第四次代码

DeliciousFoodApp--杨松林第四次实验代码/.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties

DeliciousFoodApp--杨松林第四次实验代码/.idea/.gitignore

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+# Default ignored files
+/shelf/
+/workspace.xml

DeliciousFoodApp--杨松林第四次实验代码/.idea/compiler.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <bytecodeTargetLevel target="17" />
+  </component>
+</project>

DeliciousFoodApp--杨松林第四次实验代码/.idea/deploymentTargetDropDown.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="deploymentTargetDropDown">
+    <value>
+      <entry key="app">
+        <State>
+          <targetSelectedWithDropDown>
+            <Target>
+              <type value="QUICK_BOOT_TARGET" />
+              <deviceKey>
+                <Key>
+                  <type value="VIRTUAL_DEVICE_PATH" />
+                  <value value="C:\Users\songl\.android\avd\Pixel_3a_API_34_extension_level_7_x86_64.avd" />
+                </Key>
+              </deviceKey>
+            </Target>
+          </targetSelectedWithDropDown>
+          <timeTargetWasSelectedWithDropDown value="2024-04-01T06:33:15.175480700Z" />
+        </State>
+      </entry>
+    </value>
+  </component>
+</project>

DeliciousFoodApp--杨松林第四次实验代码/.idea/gradle.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
+  <component name="GradleSettings">
+    <option name="linkedExternalProjectsSettings">
+      <GradleProjectSettings>
+        <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="gradleJvm" value="#GRADLE_LOCAL_JAVA_HOME" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+            <option value="$PROJECT_DIR$/app" />
+          </set>
+        </option>
+        <option name="resolveExternalAnnotations" value="false" />
+      </GradleProjectSettings>
+    </option>
+  </component>
+</project>

DeliciousFoodApp--杨松林第四次实验代码/.idea/migrations.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectMigrations">
+    <option name="MigrateToGradleLocalJavaHome">
+      <set>
+        <option value="$PROJECT_DIR$" />
+      </set>
+    </option>
+  </component>
+</project>

DeliciousFoodApp--杨松林第四次实验代码/.idea/misc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" default="true" project-jdk-name="jbr-17" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/build/classes" />
+  </component>
+  <component name="ProjectType">
+    <option name="id" value="Android" />
+  </component>
+  <component name="VisualizationToolProject">
+    <option name="state">
+      <ProjectState>
+        <option name="scale" value="0.6388508891928865" />
+      </ProjectState>
+    </option>
+  </component>
+</project>

DeliciousFoodApp--杨松林第四次实验代码/app/.gitignore

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+/build

DeliciousFoodApp--杨松林第四次实验代码/app/build.gradle.kts

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+plugins {
+    alias(libs.plugins.androidApplication)
+}
+
+android {
+    namespace = "com.example.deliciousfoodapp"
+    compileSdk = 34
+
+    defaultConfig {
+        applicationId = "com.example.deliciousfoodapp"
+        minSdk = 24
+        targetSdk = 34
+        versionCode = 1
+        versionName = "1.0"
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro")
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+    buildFeatures {
+        viewBinding = true
+    }
+}
+
+dependencies {
+
+    implementation(libs.appcompat)
+    implementation(libs.material)
+    implementation(libs.activity)
+    implementation(libs.constraintlayout)
+    implementation(libs.legacy.support.v4)
+    implementation(libs.recyclerview)
+    testImplementation(libs.junit)
+    androidTestImplementation(libs.ext.junit)
+    androidTestImplementation(libs.espresso.core)
+}

DeliciousFoodApp--杨松林第四次实验代码/app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

DeliciousFoodApp--杨松林第四次实验代码/app/src/androidTest/java/com/example/deliciousfoodapp/ExampleInstrumentedTest.java

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+package com.example.deliciousfoodapp;
+
+import android.content.Context;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
+        assertEquals("com.example.deliciousfoodapp", appContext.getPackageName());
+    }
+}

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <application
+        android:allowBackup="true"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.DeliciousFoodApp"
+        tools:targetApi="31">
+        <activity
+            android:name=".IndexActivity"
+            android:exported="true" />
+        <activity
+            android:name=".testActivity2"
+            android:exported="false" />
+        <activity
+            android:name=".RegisterinformationActivity"
+            android:exported="false" />
+        <activity
+            android:name=".RegisterActivity"
+            android:exported="false" />
+        <activity
+            android:name=".LoginActivity"
+            android:exported="true" />
+        <activity
+            android:name=".MainActivity"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/java/com/example/deliciousfoodapp/HomeMyAdapter.java

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+package com.example.deliciousfoodapp;
+
+import android.content.Context;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.BaseAdapter;
+import android.widget.ImageView;
+
+import com.example.deliciousfoodapp.R;
+
+import java.util.List;
+import java.util.Map;
+
+public class HomeMyAdapter extends BaseAdapter {
+    private List<Map<String, Object>> datas;
+    private Context mContext;
+
+    public HomeMyAdapter(List<Map<String, Object>> datas, Context mContext) {
+        this.datas = datas;
+        this.mContext = mContext;
+    }
+
+    @Override
+    public int getCount() {
+        // 返回数据的总数
+        return datas.size();
+    }
+
+    @Override
+    public Object getItem(int position) {
+        // 返回在list中指定位置的数据的内容
+        return datas.get(position);
+    }
+
+    @Override
+    public long getItemId(int position) {
+        // 返回数据在list中所在的位置
+        return position;
+    }
+
+    @Override
+    public View getView(int position, View convertView, ViewGroup parent) {
+        final ViewHolder holder;
+        if (convertView == null) {
+            // 使用自定义的布局文件作为Layout
+            convertView = LayoutInflater.from(mContext).inflate(
+                    R.layout.homelist_item_layout, null);
+            // 减少findView的次数
+            holder = new ViewHolder();
+            // 初始化布局中的元素
+            holder.mImageView = (ImageView)
+                    convertView.findViewById(R.id.imageview);
+            convertView.setTag(holder);
+        } else {
+            holder = (ViewHolder) convertView.getTag();
+        }
+        // 从传入的数据中提取数据并绑定到指定的view中
+        holder.mImageView.setImageResource((Integer) datas.get(position).get("img"));
+        return convertView;
+    }
+    static class ViewHolder {
+        ImageView mImageView;
+    }
+
+}

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/java/com/example/deliciousfoodapp/HomeNewAdapter.java

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+package com.example.deliciousfoodapp;
+
+import android.content.Context;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.BaseAdapter;
+import android.widget.ImageView;
+
+import com.example.deliciousfoodapp.R;
+
+import java.util.List;
+import java.util.Map;
+
+public class HomeNewAdapter extends BaseAdapter {
+    List<Map<String,Object>> datas;
+    Context mContext;
+    HomeNewAdapter(List<Map<String,Object>> datas, Context mContext){
+        this.datas=datas;
+        this.mContext=mContext;
+    }
+    @Override
+    public int getCount() {
+        return datas.size();
+    }
+
+    @Override
+    public Object getItem(int position) {
+        return datas.get(position);
+    }
+
+    @Override
+    public long getItemId(int position) {
+        return position;
+    }
+
+    @Override
+    public View getView(int position, View convertView, ViewGroup parent) {
+        ViewHolder holder;
+        if(convertView==null){
+            convertView= LayoutInflater.from(mContext).inflate(R.layout.homelist_item_layout,null);
+            holder=new ViewHolder();
+            holder.mImageView=convertView.findViewById(R.id.imageview);
+            convertView.setTag(holder);
+        }else{
+            holder= (ViewHolder) convertView.getTag();
+        }
+
+        holder.mImageView.setImageResource((Integer) datas.get(position).get("img"));
+
+        return convertView;
+    }
+
+    static class ViewHolder {
+        ImageView mImageView;
+    }
+}
+

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/java/com/example/deliciousfoodapp/IndexActivity.java

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+package com.example.deliciousfoodapp;
+
+import android.os.Bundle;
+import android.view.View;
+import android.widget.LinearLayout;
+
+import androidx.activity.EdgeToEdge;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentManager;
+import androidx.fragment.app.FragmentTransaction;
+
+public class IndexActivity extends AppCompatActivity implements View.OnClickListener{
+    public  LinearLayout homeline,foodline,shoppingline,personline;
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        EdgeToEdge.enable(this);
+        setContentView(R.layout.activity_index);
+        homeline=findViewById(R.id.home);
+        homeline.setOnClickListener(this);
+        foodline=findViewById(R.id.food);
+        foodline.setOnClickListener(this);
+        shoppingline=findViewById(R.id.shopping);
+        shoppingline.setOnClickListener(this);
+        personline=findViewById(R.id.person);
+        personline.setOnClickListener(this);
+        replaceFragment(new homeFragment());
+    }
+    @Override
+    public void onClick(View v) {
+        switch (v.getId()){
+            case R.id.home:
+                replaceFragment(new homeFragment());
+                break;
+            case R.id.food:
+                replaceFragment(new foodFragment());
+                break;
+            case R.id.shopping:
+                replaceFragment(new shopFragment());
+                break;
+            case R.id.person:
+                replaceFragment(new personFragment());
+        }
+    }
+
+    private void replaceFragment(Fragment fragment) {
+        FragmentManager fragmentManager=getSupportFragmentManager();
+        FragmentTransaction transaction=fragmentManager.beginTransaction();
+        transaction.replace(R.id.framlayout,fragment);
+        transaction.commit();
+    }
+}

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/java/com/example/deliciousfoodapp/LoginActivity.java

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+package com.example.deliciousfoodapp;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+
+import androidx.activity.EdgeToEdge;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.core.graphics.Insets;
+import androidx.core.view.ViewCompat;
+import androidx.core.view.WindowInsetsCompat;
+
+public class LoginActivity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        EdgeToEdge.enable(this);
+        setContentView(R.layout.activity_login);
+        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main), (v, insets) -> {
+            Insets systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars());
+            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom);
+            return insets;
+        });
+        Button button1 = (Button) findViewById(R.id.buttonlogin);
+        Button button2 = (Button) findViewById(R.id.buttonregister);
+        button1.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                Intent intent=new Intent(LoginActivity.this, IndexActivity.class);
+                startActivity(intent);
+            }
+        });
+        button2.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                   Intent intent=new Intent(LoginActivity.this, RegisterActivity.class);
+                   startActivity(intent);
+            }
+        });
+    }
+}

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/java/com/example/deliciousfoodapp/MainActivity.java

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+package com.example.deliciousfoodapp;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+
+import androidx.activity.EdgeToEdge;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.core.graphics.Insets;
+import androidx.core.view.ViewCompat;
+import androidx.core.view.WindowInsetsCompat;
+
+public class MainActivity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        EdgeToEdge.enable(this);
+        setContentView(R.layout.activity_main);
+        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main), (v, insets) -> {
+            Insets systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars());
+            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom);
+            return insets;
+        });
+
+        Button button = (Button) findViewById(R.id.button);
+        button.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                  Intent intent=new Intent(MainActivity.this, LoginActivity.class);
+                  startActivity(intent);
+            }
+        });
+    }
+}

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/java/com/example/deliciousfoodapp/RegisterActivity.java

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+package com.example.deliciousfoodapp;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+import android.widget.CheckBox;
+import android.widget.EditText;
+import android.widget.RadioButton;
+import android.widget.RadioGroup;
+
+import androidx.appcompat.app.AppCompatActivity;
+public class RegisterActivity extends AppCompatActivity implements RadioGroup.OnCheckedChangeListener, View.OnClickListener {
+    //定义字符串用来保存各个信息
+    private String username_str = "";
+    private String password_str = "";
+    private String surepassword_str = "";
+    private String phone_str = "";
+    private String email_str = "";
+    private String address_str = "";
+    //默认为男性选中
+    private String genderRadioGroup_str = "男";
+    private String taste_str = "1";
+
+    //组件定义
+    EditText username_edit, password_edit, surepassword_edit, phone_edit, email_edit, address_edit;
+    RadioGroup genderRadioGroup_group;
+    RadioButton nan_but, nv_but;
+    CheckBox sour, sweet, spicy;
+    Button register;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_register);
+        //组件初始化
+        username_edit = (EditText) findViewById(R.id.usernamebox);
+        password_edit = (EditText) findViewById(R.id.passwordbox);
+        surepassword_edit = (EditText) findViewById(R.id.surepasswordbox);
+        phone_edit = (EditText) findViewById(R.id.phonebox);
+        email_edit = (EditText) findViewById(R.id.emailbox);
+        address_edit = (EditText) findViewById(R.id.addressbox);
+        genderRadioGroup_group = (RadioGroup) findViewById(R.id.genderRadioGroup);
+        //添加监听事件
+        genderRadioGroup_group.setOnCheckedChangeListener(this);
+        nan_but = (RadioButton) findViewById(R.id.maleRadioButton);
+        sour = (CheckBox) findViewById(R.id.checkbox_sour);
+        sweet = (CheckBox) findViewById(R.id.checkbox_sweet);
+        spicy = (CheckBox) findViewById(R.id.checkbox_spicy);
+        register = (Button) findViewById(R.id.referbutton);
+        register.setOnClickListener(this);
+    }
+
+    @Override
+    public void onClick(View view) {
+        if (view.getId() == R.id.referbutton) {
+            // 获取用户名、手机号、密码等信息
+            username_str = username_edit.getText().toString();
+            password_str = password_edit.getText().toString();
+            surepassword_str = surepassword_edit.getText().toString();
+            phone_str = phone_edit.getText().toString();
+            email_str = email_edit.getText().toString();
+            address_str = address_edit.getText().toString();
+
+            // 获取喜欢的口味即复选框的值
+            taste_str = "";  // 清除上一次已经选中的选项
+            if (sour.isChecked()) {
+                taste_str += sour.getText().toString();
+            }
+            if (sweet.isChecked()) {
+                taste_str += sweet.getText().toString();
+            }
+            if (spicy.isChecked()) {
+                taste_str += spicy.getText().toString();
+            }
+
+            Intent intent = new Intent(this, RegisterinformationActivity.class);
+            Bundle bundle = new Bundle();
+            bundle.putString("usernamebox", username_str);
+            bundle.putString("passwordbox", password_str);
+            bundle.putString("surepasswordbox", surepassword_str);
+            bundle.putString("phonebox", phone_str);
+            bundle.putString("emailbox", email_str);
+            bundle.putString("addressbox", address_str);
+            bundle.putString("genderRadioGroup", genderRadioGroup_str);
+            bundle.putString("tastebox", taste_str);
+            intent.putExtras(bundle);
+            startActivity(intent);
+        }
+    }
+
+    @Override
+    public void onCheckedChanged(RadioGroup group, int checkedId) {
+        //根据用户选择来改变sex_str的值
+        genderRadioGroup_str = checkedId == R.id.maleRadioButton ? "男性" : "女性";
+    }
+
+}

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/java/com/example/deliciousfoodapp/RegisterinformationActivity.java

@@ -0,0 +1,60 @@
+package com.example.deliciousfoodapp;
+
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import androidx.activity.EdgeToEdge;
+import androidx.appcompat.app.AlertDialog;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.core.graphics.Insets;
+import androidx.core.view.ViewCompat;
+import androidx.core.view.WindowInsetsCompat;
+
+public class RegisterinformationActivity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        EdgeToEdge.enable(this);
+        setContentView(R.layout.activity_registerinformation);
+        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main), (v, insets) -> {
+            Insets systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars());
+            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom);
+            Intent intent=this.getIntent();
+            Bundle bundle=intent.getExtras();
+            String username=bundle.getString("usernamebox");
+            String password=bundle.getString("passwordbox");
+            String surepassword=bundle.getString("surepasswordbox");
+            String phone=bundle.getString("phonebox");
+            String email=bundle.getString("emailbox");
+            String address=bundle.getString("addressbox");
+            String gender=bundle.getString("genderRadioGroup");
+            String taste=bundle.getString("tastebox");
+            TextView show_text=(TextView)findViewById(R.id.show_content);
+            show_text.setText("用户名为："+username+"\n"+"登录密码为："+password+"\n"+"确认密码为："+surepassword+"\n"+"手机号码为："+phone+"\n"+"电子邮箱为："+email+"\n"+"所在地为："+address+"\n"+"性别是："+gender+"\n"+"喜欢的口味是："+taste+"\n");
+            return insets;
+        });
+        Button gobackbutton = (Button) findViewById(R.id.gobackbutton);
+        gobackbutton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                new AlertDialog.Builder(RegisterinformationActivity.this).setTitle("系统提示")
+                        .setMessage("请确认所有信息都正确后再点击“确定")
+                        .setPositiveButton("确定", new DialogInterface.OnClickListener() {
+                            public void onClick(DialogInterface dialog, int which) {
+                                Intent intent=new Intent(RegisterinformationActivity.this, LoginActivity.class);
+                                startActivity(intent);
+                            }
+                        }).setNegativeButton("返回", new DialogInterface.OnClickListener() {
+                            @Override
+                            public void onClick(DialogInterface dialog, int which) {
+                            }
+                        }).show();
+            }
+        });
+    }
+}

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/java/com/example/deliciousfoodapp/adapter/FoodLeftAdapter.java

@@ -0,0 +1,94 @@
+package com.example.deliciousfoodapp.adapter;
+
+import android.annotation.SuppressLint;
+import android.content.Context;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.example.deliciousfoodapp.R;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class FoodLeftAdapter extends RecyclerView.Adapter<FoodLeftAdapter.MyHolder> {
+    private List<String>dataList=new ArrayList<>();
+    private int currentIndex=0;
+    public FoodLeftAdapter(List<String> dataList){
+        this.dataList=dataList;
+    }
+
+    @NonNull
+    @Override
+    public MyHolder onCreateViewHolder(@NonNull ViewGroup parent,int viewType){
+        View view=LayoutInflater.from(parent.getContext()).inflate(R.layout.item_left_food,null);
+                return new MyHolder(view);
+    }
+
+    @SuppressLint("RecyclerView")
+    @Override
+    public void onBindViewHolder (@NonNull MyHolder holder,int position){
+        //绑定数据
+        String name = dataList.get(position);
+        holder.textView.setText(name);
+
+        if (currentIndex == position) {
+            holder.itemView.setBackgroundResource(R.drawable.type_selector_bg);
+        } else {
+            holder.itemView.setBackgroundResource(0); // 清除背景
+        }
+
+        //分类的点击事件
+        holder.itemView.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                if(null!=mLeftListOnClickItemListener){//点击事件作用于左边整条列表上
+                    mLeftListOnClickItemListener.onItemClick(position);//如果它不为空，回调一个position
+                    setCurrentIndex(position); // 更新选中项索引
+                }
+            }
+        });
+
+        //点击它就出现高亮前面有一个标识
+        if(currentIndex==position){
+            holder.itemView.setBackgroundResource(R.drawable.type_selector_bg);
+        }
+    }
+
+    @Override
+    public int getItemCount(){
+        return dataList.size();
+    }
+
+    static class MyHolder extends RecyclerView.ViewHolder {
+        TextView textView;
+
+        public MyHolder(@NonNull View itemView) {
+            super(itemView);
+            textView=itemView.findViewById(R.id.name);
+        }
+    }
+
+    private LeftListOnClickItemListener mLeftListOnClickItemListener;
+
+//    public LeftListOnClickItemListener getLeftListOnClickItemListener(){
+//        return mLeftListOnClickItemListener;
+//    }
+
+    public void setLeftListOnClickItemListener(LeftListOnClickItemListener leftListOnClickItemListener){
+        mLeftListOnClickItemListener=leftListOnClickItemListener;
+    }
+    //写一个点击事件
+    public interface LeftListOnClickItemListener{
+        void onItemClick(int position);
+    }
+
+    public void setCurrentIndex(int position){
+        this.currentIndex=position;
+        notifyDataSetChanged();//刷新一下
+    }
+}

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/java/com/example/deliciousfoodapp/adapter/FoodRightAdapter.java

@@ -0,0 +1,68 @@
+package com.example.deliciousfoodapp.adapter;
+
+import android.content.Context;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.example.deliciousfoodapp.R;
+import com.example.deliciousfoodapp.entity.FoodInfo;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class FoodRightAdapter extends RecyclerView.Adapter<FoodRightAdapter.ViewHolder> {
+    private List<FoodInfo> mFoodInfos=new ArrayList<>();
+
+    public void setListData(List<FoodInfo> list){
+        this.mFoodInfos=list;
+        //刷新
+        notifyDataSetChanged();
+    }
+
+    @NonNull
+    @Override
+    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
+        //加布局
+        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_right_food, null);
+        return new ViewHolder(view);
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
+        //绑定数据
+        FoodInfo foodInfo =mFoodInfos.get(position);
+        holder.food_img.setImageResource(foodInfo.getFood_img());
+        holder.food_title.setText(foodInfo.getFood_title());
+        holder.food_details.setText(foodInfo.getFood_details());
+        //价格是int类型但是只能设置为文本类型，在后面加个+加引号
+        holder.food_price.setText(foodInfo.getFood_price()+"");
+        holder.food_next.setText(foodInfo.getFood_next());
+    }
+
+    @Override
+    public int getItemCount() {
+        return mFoodInfos.size();
+    }
+
+   static class ViewHolder extends RecyclerView.ViewHolder {
+        ImageView food_img;
+        TextView food_title;
+        TextView food_details;
+        TextView food_price;
+       TextView food_next;
+        public ViewHolder(@NonNull View itemView) {
+            super(itemView);
+            food_img = itemView.findViewById(R.id.food_img);
+            food_title = itemView.findViewById(R.id.food_title);
+            food_details = itemView.findViewById(R.id.food_details);
+            food_price= itemView.findViewById(R.id.food_price);
+            food_next= itemView.findViewById(R.id.food_next);
+        }
+    }
+}

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/java/com/example/deliciousfoodapp/entity/FoodDataService.java

@@ -0,0 +1,159 @@
+package com.example.deliciousfoodapp.entity;
+
+import com.example.deliciousfoodapp.R;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class FoodDataService {
+    //提供数据
+    public static List<FoodInfo> getListData(int position){
+        List<FoodInfo> list=new ArrayList<>();
+        if(position==0){
+            list.add(new FoodInfo(0, R.drawable.grapefruit,"天然清爽，健康选择。","酸甜可口，带有清新的果香，满足你对健康生活的追求。",12,"元/斤"));
+            list.add(new FoodInfo(1, R.drawable.dragonfruit,"独特魅力，色彩斑斓。","口感清爽，果肉细腻，多汁爽口，是时尚人士的首选。",15,"元/斤"));
+            list.add(new FoodInfo(2, R.drawable.hamimelon,"果香四溢，甜蜜滋味。","水分丰富，果肉细腻，口感清甜，让你尽情享受夏日的清凉。",14,"元/斤"));
+            list.add(new FoodInfo(3, R.drawable.pineapple,"酸甜可口，果香扑鼻。","口感丰富，多汁爽口，富含维生素C，是夏日解暑的最佳选择。",8,"元/斤"));
+            list.add(new FoodInfo(4, R.drawable.cherry,"美味小巧，诱人色泽。","果肉鲜嫩，酸甜可口，口感丰富，是爱情的象征。",46,"元/1斤"));
+            list.add(new FoodInfo(5, R.drawable.lemon,"清新怡人，酸甜可口。","富含维生素C，口感鲜爽，可制作饮料或调味料，增添生活情趣。",13,"元/斤"));
+            list.add(new FoodInfo(6, R.drawable.starfruit,"果肉细腻，香甜可口。","鲜红诱人，汁水丰富，口感浓郁，是夏日水果中的佳品。",36,"元/斤"));
+            list.add(new FoodInfo(7, R.drawable.sweetcherry,"明星风采，独特风味。","口感清爽，果肉多汁，味道独特，富含维生素C，让你倍感清新。",10,"元/斤"));
+            }else if(position==1){
+            list.add(new FoodInfo(8, R.drawable.one,"新鲜炒酱、烹饪必备。","汁水丰富，口感鲜甜，色泽鲜艳，是健康餐桌上的明星。",6,"元/斤"));
+            list.add(new FoodInfo(9, R.drawable.three,"凉拌、生吃首选。","口感清脆，汁水丰富，清凉解暑，是夏日的必备蔬菜。",3,"元/斤"));
+            list.add(new FoodInfo(10, R.drawable.one,"蔬菜沙拉、炖汤佳品。","口感甘甜，营养丰富，富含胡萝卜素，有益眼睛健康。",5,"元/斤"));
+            list.add(new FoodInfo(11, R.drawable.three,"清炒、煮汤、火锅必备。","叶片脆嫩，汁水鲜甜，营养丰富，是家常菜的主角。",2,"元/斤"));
+            list.add(new FoodInfo(12, R.drawable.one,"烧茄子、酱茄子、烤茄子。","肉质细嫩，口感鲜美，烹饪多样，满足不同口味需求。",4,"元/斤"));
+            list.add(new FoodInfo(13, R.drawable.three,"炒菜、凉拌、烧烤。","口感爽脆，香气诱人，是各类菜肴的调味佳品。",3,"元/斤"));
+            list.add(new FoodInfo(14, R.drawable.mango,"汆、炒、煮皆宜。","叶片嫩绿，口感爽滑，富含维生素C，有益健康。",7,"元/斤"));
+            list.add(new FoodInfo(15, R.drawable.two,"炖、煮、炸、烤皆可。","口感绵软，味道浓郁，是各类美食的基础材料。",3,"元/斤"));
+        }else if(position==2){
+            list.add(new FoodInfo(16, R.drawable.one,"澳洲和牛，口感细腻，肉香四溢，尽享尊贵美味。","肉质鲜嫩多汁，口感柔滑，带有淡淡的奶香，令人回味无穷。",100,"元/斤"));
+            list.add(new FoodInfo(17, R.drawable.three,"黑山猪肉，肉质鲜美，口感醇厚，健康又美味。","肉质紧实，口感鲜美，带有淡淡的甜香，是烹饪佳肴的绝佳选择。",200,"元/斤"));
+            list.add(new FoodInfo(18, R.drawable.one,"新疆羊肉，肉质鲜嫩，口感独特，草原风情尽在其中。","羊肉鲜美无膻，口感细腻，带有一种独特的草原香气，令人陶醉。",90,"元/斤"));
+            list.add(new FoodInfo(19, R.drawable.three,"山林散养鸡，肉质紧实，口感鲜美，营养又健康。","鸡肉鲜美多汁，口感滑嫩，带有山林的自然清香，是健康饮食的首选。",120,"元/斤"));
+            list.add(new FoodInfo(20, R.drawable.one,"深海金枪鱼，肉质细腻，口感鲜美，海洋馈赠的珍品。","鱼肉鲜嫩爽滑，口感鲜美，带有淡淡的海洋气息，令人流连忘返。",300,"元/斤"));
+            list.add(new FoodInfo(21, R.drawable.three,"金华火腿，口感醇香，肉质鲜美，烹饪佳品不容错过。","金华火腿，口感醇香，肉质鲜美，烹饪佳品不容错过。",260,"元/斤"));
+            list.add(new FoodInfo(22, R.drawable.mango,"炭烤羊排，外酥里嫩，香气四溢，烧烤美味尽在其中。","羊排经过炭火慢烤，外酥里嫩，口感鲜美，香气扑鼻，是烧烤爱好者的最爱。",280,"元/斤"));
+            list.add(new FoodInfo(23, R.drawable.two,"香煎培根，口感香脆，肉质鲜美，美味早餐的不二之选。","培根经过香煎，口感香脆，肉质鲜美，搭配面包或鸡蛋食用更佳。",166,"元/斤"));
+        }else if(position==3){
+            list.add(new FoodInfo(24, R.drawable.one,"皮薄馅足，汤汁鲜美，品尝传统小吃之经典。","小笼包皮薄如纸，内馅鲜嫩多汁，轻咬一口，汤汁四溢，口感细腻。",15,"元/笼"));
+            list.add(new FoodInfo(25, R.drawable.three,"香脆可口，馅料丰富，街头小吃之首选。","煎饼果子外皮金黄酥脆，内馅饱满，口感层次丰富，是早餐或夜宵的绝佳选择。",10,"元/个"));
+            list.add(new FoodInfo(26, R.drawable.one,"外酥里嫩，气味独特，挑战味蕾的臭豆腐。","臭豆腐经过特殊发酵，外皮酥脆，内里嫩滑，口感独特，是喜欢尝试不同风味食客的选择。",16,"元/份"));
+            list.add(new FoodInfo(27, R.drawable.three,"肉质鲜嫩，香气扑鼻，烧烤小吃的代表之作。","羊肉串选用优质羊肉，经过精心烤制，肉质鲜嫩多汁，香气四溢，是烧烤爱好者的最爱。",2,"元/串"));
+            list.add(new FoodInfo(28, R.drawable.one,"麻辣鲜香，食材丰富，味蕾的麻辣盛宴。","麻辣烫选用多种食材，搭配麻辣底料，口感麻辣鲜香，让人回味无穷，是喜欢辣味食客的不二之选。",30,"元/份"));
+            list.add(new FoodInfo(29, R.drawable.three,"甜而不腻，外酥内软，传统甜点的魅力所在。","糖油粑粑外皮酥脆，内里软糯，甜度适中，口感丰富，是喜欢甜食者的心头好。",8,"元/个"));
+            list.add(new FoodInfo(30, R.drawable.mango,"冷面筋道，酱料浓郁，街头巷尾的美食佳品。","烤冷面选用优质冷面，搭配特制酱料，口感筋道爽滑，酱香四溢，是夜市小吃的一大特色。",10,"元/份"));
+            list.add(new FoodInfo(31, R.drawable.two,"酸辣可口，粉质滑嫩，开胃解馋的小吃之选。","酸辣粉选用优质红薯粉，搭配酸辣汤汁，口感滑嫩爽口，酸辣适中，是开胃解馋的绝佳小吃。",12,"元/碗"));
+        }else if(position==4){
+            list.add(new FoodInfo(32, R.drawable.one,"酸辣粉选用优质红薯粉，搭配酸辣汤汁，口感滑嫩爽口，酸辣适中，是开胃解馋的绝佳小吃。","慕斯蛋糕口感轻盈，入口即化，搭配丰富的水果和果酱，层次丰富，甜而不腻。",20,"元/块"));
+            list.add(new FoodInfo(33, R.drawable.three,"咖啡香浓，口感丰富，传统意式甜点的经典之作。","提拉米苏融合了咖啡的苦涩、可可的浓郁和奶油的绵密，口感层次丰富，令人回味无穷。",20,"元/份"));
+            list.add(new FoodInfo(34, R.drawable.one,"巧克力浓郁，口感醇厚，满足巧克力控的味蕾。","黑森林蛋糕外层覆盖着浓郁的巧克力，内里则是松软的蛋糕和酸甜的樱桃，口感丰富，甜而不腻。",35,"元/块"));
+            list.add(new FoodInfo(35, R.drawable.three,"色彩缤纷，口感酥脆，法式甜点的精致之选。","马卡龙外壳酥脆，内里柔软，色彩缤纷，口感轻盈，是下午茶时光的绝佳伴侣。",9,"元/个"));
+            list.add(new FoodInfo(36, R.drawable.one,"榴莲飘香，口感滑嫩，热带风味的甜品盛宴。","榴莲班戟外皮薄脆，内馅是浓郁的榴莲肉，口感滑嫩，香气四溢，是榴莲爱好者的最爱。",20,"元/个"));
+            list.add(new FoodInfo(37, R.drawable.three,"芒果香甜，口感嫩滑，夏日清凉的甜品佳品。","芒果布丁以新鲜芒果为原料，口感嫩滑，芒果的香甜与布丁的细腻完美结合，是夏日消暑的绝佳选择。",16,"元/杯"));
+            list.add(new FoodInfo(38, R.drawable.mango,"焦糖香浓，口感细腻，传统英式甜点的魅力所在。","焦糖炖蛋口感柔滑，焦糖的香甜与蛋液的细腻完美结合，入口即化，是甜品爱好者的不二之选。",15,"元/份"));
+            list.add(new FoodInfo(39, R.drawable.two,"芒果清爽，口感丰富，夏日解暑的甜品之选。","杨枝甘露以芒果、西柚等水果为主料，口感清爽，酸甜适中，是夏日消暑、解渴的绝佳甜品。",18,"元/碗"));
+        }else if(position==5){
+            list.add(new FoodInfo(40, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(41, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(42, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(43, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(44, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(45, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(46, R.drawable.mango,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(47, R.drawable.two,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+        }else if(position==6){
+            list.add(new FoodInfo(48, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(49, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(50, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(51, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(52, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(53, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(54, R.drawable.mango,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(55, R.drawable.two,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+        }else if(position==7){
+            list.add(new FoodInfo(56, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(57, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(58, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(59, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(60, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(61, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(62, R.drawable.mango,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(63, R.drawable.two,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+        }else if(position==8){
+            list.add(new FoodInfo(64, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(65, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(66, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(67, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(68, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(69, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(70, R.drawable.mango,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(71, R.drawable.two,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+        }else if(position==9){
+            list.add(new FoodInfo(72, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(73, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(74, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(75, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(76, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(77, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(78, R.drawable.mango,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(79, R.drawable.two,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",1,"元/1斤"));
+        }else if(position==10){
+            list.add(new FoodInfo(80, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(81, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(82, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(83, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(84, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(85, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(86, R.drawable.mango,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(87, R.drawable.two,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+        }else if(position==11){
+            list.add(new FoodInfo(88, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(89, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(90, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(91, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(92, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(93, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(94, R.drawable.mango,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(95, R.drawable.two,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+        }else if(position==12){
+            list.add(new FoodInfo(96, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(97, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(98, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(99, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(100, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(101, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(102, R.drawable.mango,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(103, R.drawable.two,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+        }else if(position==13){
+            list.add(new FoodInfo(104, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(105, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(106, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(107, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(108, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(109, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(110, R.drawable.mango,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(111, R.drawable.two,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+        }else if(position==14){
+            list.add(new FoodInfo(112, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(113, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(114, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(115, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(116, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(117, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(118, R.drawable.mango,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(119, R.drawable.two,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+        }else{
+            list.add(new FoodInfo(120, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(121, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(122, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(123, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(124, R.drawable.one,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(125, R.drawable.three,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(126, R.drawable.mango,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+            list.add(new FoodInfo(127, R.drawable.two,"尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。","口味：甜  场地：湖南",10,"元/1斤"));
+        }
+        return list;
+    }
+}

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/java/com/example/deliciousfoodapp/entity/FoodInfo.java

@@ -0,0 +1,67 @@
+package com.example.deliciousfoodapp.entity;
+
+public class FoodInfo {
+    private int food_id;
+    private int food_img;
+    private String food_title;
+    private String food_details;
+    private int food_price;
+
+    private String food_next;
+    public FoodInfo(int food_id, int food_img, String food_title, String food_details, int food_price,String food_next) {
+        this.food_id = food_id;
+        this.food_img = food_img;
+        this.food_title = food_title;
+        this.food_details = food_details;
+        this.food_price = food_price;
+        this.food_next = food_next;
+    }
+
+    public int getFood_id() {
+        return food_id;
+    }
+
+    public void setFood_id(int food_id) {
+        this.food_id = food_id;
+    }
+
+    public int getFood_img() {
+        return food_img;
+    }
+
+    public void setFood_img(int food_img) {
+        this.food_img = food_img;
+    }
+
+    public String getFood_title() {
+        return food_title;
+    }
+
+    public void setFood_title(String food_title) {
+        this.food_title = food_title;
+    }
+
+    public String getFood_details() {
+        return food_details;
+    }
+
+    public void setFood_details(String food_details) {
+        this.food_details = food_details;
+    }
+
+    public int getFood_price() {
+        return food_price;
+    }
+
+    public void setFood_price(int food_price) {
+        this.food_price = food_price;
+    }
+
+    public String getFood_next() {
+        return food_next;
+    }
+
+    public void setFood_next(String food_next) {
+        this.food_next = food_next;
+    }
+}

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/java/com/example/deliciousfoodapp/foodFragment.java

@@ -0,0 +1,81 @@
+package com.example.deliciousfoodapp;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Toast;
+
+import androidx.annotation.NonNull;
+import androidx.fragment.app.Fragment;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.example.deliciousfoodapp.adapter.FoodLeftAdapter;
+import com.example.deliciousfoodapp.adapter.FoodRightAdapter;
+import com.example.deliciousfoodapp.entity.FoodDataService;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class foodFragment extends Fragment {
+    private View rootView;
+    private RecyclerView foodleftRecyclerView;
+    private RecyclerView foodrightRecyclerView;
+    private FoodLeftAdapter mLeftListAdapter;
+
+    private FoodRightAdapter mRightListAdapter;
+    private List<String> leftDataList=new ArrayList<>();
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                             Bundle savedInstanceState) {
+        rootView=inflater.inflate(R.layout.fragment_food, container, false);
+
+        //初始化控件
+        foodleftRecyclerView=rootView.findViewById(R.id.foodleftRecyclerView);
+        foodrightRecyclerView=rootView.findViewById(R.id.foodrightRecyclerView);
+        return rootView;
+    }
+
+    @Override
+    public void onActivityCreated(@NonNull Bundle savedInstanceState){
+        super.onActivityCreated(savedInstanceState);
+
+        leftDataList.add("水果");
+        leftDataList.add("蔬菜");
+        leftDataList.add("肉类");
+        leftDataList.add("小吃");
+        leftDataList.add("甜点");
+        leftDataList.add("主食类");
+        leftDataList.add("面食");
+        leftDataList.add("海鲜");
+        leftDataList.add("炸鸡");
+        leftDataList.add("饮品");
+        leftDataList.add("早点");
+        leftDataList.add("土特产");
+        leftDataList.add("凉菜");
+        leftDataList.add("汤羹");
+        leftDataList.add("面包");
+
+
+        mLeftListAdapter=new FoodLeftAdapter(leftDataList);
+        foodleftRecyclerView.setAdapter(mLeftListAdapter);
+
+        mRightListAdapter=new FoodRightAdapter();
+        foodrightRecyclerView.setAdapter(mRightListAdapter);
+        //默认加载美食数据
+        mRightListAdapter.setListData(FoodDataService.getListData(0));
+
+        //recyclerview点击事件
+        mLeftListAdapter.setLeftListOnClickItemListener(new FoodLeftAdapter.LeftListOnClickItemListener() {
+            @Override
+            public void onItemClick(int position) {
+              //Toast.makeText(getActivity(),position+"----",Toast.LENGTH_SHORT).show();
+                mLeftListAdapter.setCurrentIndex(position);
+
+                //点击左侧分类就切换右侧的数据
+                mRightListAdapter.setListData(FoodDataService.getListData(position));
+            }
+        });
+    }
+}

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/java/com/example/deliciousfoodapp/homeFragment.java

@@ -0,0 +1,67 @@
+package com.example.deliciousfoodapp;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ListView;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+
+import com.example.deliciousfoodapp.R;
+import com.example.deliciousfoodapp.HomeNewAdapter;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+
+public class homeFragment extends Fragment {
+    private ListView mListView;
+    private HomeNewAdapter myAdapter;
+    private List<Map<String, Object>> list = new ArrayList<>();
+
+    @Nullable
+    @Override
+    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
+        View view = inflater.inflate(R.layout.fragment_home, container, false);
+
+        initData();
+
+        mListView = view.findViewById(R.id.homelistview);
+        myAdapter = new HomeNewAdapter(list, requireContext());
+        mListView.setAdapter(myAdapter);
+
+        return view;
+    }
+
+    // 自定义数据，也可以添加网络数据
+    private void initData() {
+        Map<String, Object> map = new HashMap<>();
+        map.put("img", R.drawable.one);
+        list.add(map);
+
+        map = new HashMap<>();
+        map.put("img", R.drawable.two);
+        list.add(map);
+
+        map = new HashMap<>();
+        map.put("img", R.drawable.three);
+        list.add(map);
+
+        map = new HashMap<>();
+        map.put("img", R.drawable.four);
+        list.add(map);
+
+        map = new HashMap<>();
+        map.put("img", R.drawable.five);
+        list.add(map);
+
+        map = new HashMap<>();
+        map.put("img", R.drawable.six);
+        list.add(map);
+    }
+}

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/java/com/example/deliciousfoodapp/personFragment.java

@@ -0,0 +1,28 @@
+package com.example.deliciousfoodapp;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.fragment.app.Fragment;
+
+import com.example.deliciousfoodapp.R;
+
+
+public class personFragment extends Fragment {
+
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                             Bundle savedInstanceState) {
+
+        return inflater.inflate(R.layout.fragment_person, container, false);
+    }
+}

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/java/com/example/deliciousfoodapp/placeholder/PlaceholderContent.java

@@ -0,0 +1,72 @@
+package com.example.deliciousfoodapp.placeholder;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Helper class for providing sample content for user interfaces created by
+ * Android template wizards.
+ * <p>
+ * TODO: Replace all uses of this class before publishing your app.
+ */
+public class PlaceholderContent {
+
+    /**
+     * An array of sample (placeholder) items.
+     */
+    public static final List<PlaceholderItem> ITEMS = new ArrayList<PlaceholderItem>();
+
+    /**
+     * A map of sample (placeholder) items, by ID.
+     */
+    public static final Map<String, PlaceholderItem> ITEM_MAP = new HashMap<String, PlaceholderItem>();
+
+    private static final int COUNT = 25;
+
+    static {
+        // Add some sample items.
+        for (int i = 1; i <= COUNT; i++) {
+            addItem(createPlaceholderItem(i));
+        }
+    }
+
+    private static void addItem(PlaceholderItem item) {
+        ITEMS.add(item);
+        ITEM_MAP.put(item.id, item);
+    }
+
+    private static PlaceholderItem createPlaceholderItem(int position) {
+        return new PlaceholderItem(String.valueOf(position), "Item " + position, makeDetails(position));
+    }
+
+    private static String makeDetails(int position) {
+        StringBuilder builder = new StringBuilder();
+        builder.append("Details about Item: ").append(position);
+        for (int i = 0; i < position; i++) {
+            builder.append("\nMore details information here.");
+        }
+        return builder.toString();
+    }
+
+    /**
+     * A placeholder item representing a piece of content.
+     */
+    public static class PlaceholderItem {
+        public final String id;
+        public final String content;
+        public final String details;
+
+        public PlaceholderItem(String id, String content, String details) {
+            this.id = id;
+            this.content = content;
+            this.details = details;
+        }
+
+        @Override
+        public String toString() {
+            return content;
+        }
+    }
+}

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/java/com/example/deliciousfoodapp/shopFragment.java

@@ -0,0 +1,27 @@
+package com.example.deliciousfoodapp;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.fragment.app.Fragment;
+
+import com.example.deliciousfoodapp.R;
+
+
+public class shopFragment extends Fragment {
+
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                             Bundle savedInstanceState) {
+        return inflater.inflate(R.layout.fragment_shop, container, false);
+    }
+}

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/res/drawable/edittext_border.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android">
+    <solid android:color="#FFFFFF" />
+    <stroke
+        android:width="2dp"
+        android:color="#000000" />
+    <corners
+        android:radius="4dp" />
+</shape>

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/res/drawable/ic_launcher_background.xml

@@ -0,0 +1,170 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillColor="#3DDC84"
+        android:pathData="M0,0h108v108h-108z" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M9,0L9,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,0L19,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,0L29,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,0L39,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,0L49,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,0L59,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,0L69,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,0L79,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M89,0L89,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M99,0L99,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,9L108,9"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,19L108,19"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,29L108,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,39L108,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,49L108,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,59L108,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,69L108,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,79L108,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,89L108,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,99L108,99"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,29L89,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,39L89,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,49L89,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,59L89,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,69L89,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,79L89,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,19L29,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,19L39,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,19L49,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,19L59,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,19L69,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,19L79,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+</vector>

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/res/drawable/ic_launcher_foreground.xml

@@ -0,0 +1,30 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="85.84757"
+                android:endY="92.4963"
+                android:startX="42.9492"
+                android:startY="49.59793"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/res/drawable/type_selector_bg.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+           <item>
+                 <shape>
+                     <solid android:color="@color/white"/>
+                 </shape>
+           </item>
+
+<!--           在选中的前面加一个标识-->
+           <item android:top="10dp" android:bottom="10dp" android:right="76dp">
+               <shape>
+                   <solid android:color="#FF9800"/>
+               </shape>
+           </item>
+</layer-list>

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/res/layout/activity_index.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    tools:context=".IndexActivity">
+
+    <FrameLayout
+        android:id="@+id/framlayout"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1">
+
+
+    </FrameLayout>
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content">
+        <include layout="@layout/content_nav"/>
+    </LinearLayout>
+
+</LinearLayout>

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/res/layout/activity_login.xml

@@ -0,0 +1,184 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".LoginActivity">
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="horizontal">
+        <ImageView
+            android:id="@+id/imageView2"
+            android:layout_width="match_parent"
+            android:layout_height="105dp"
+            android:layout_weight="1"
+            app:srcCompat="@drawable/title"
+            tools:ignore="MissingConstraints" />
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="horizontal"
+        android:layout_marginTop="80dp"
+        android:gravity="center_horizontal">
+        <ImageButton
+            android:id="@+id/imageButton4"
+            android:layout_width="225dp"
+            android:layout_height="220dp"
+            android:layout_marginTop="15dp"
+
+            app:srcCompat="@drawable/noodles" />
+    </LinearLayout>
+
+    <TableLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_marginTop="300dp"
+        android:stretchColumns="1">
+        <TableRow
+            android:layout_width="match_parent"
+            android:layout_height="match_parent">
+            <ImageView
+                android:id="@+id/imageView6"
+                android:layout_width="50dp"
+                android:layout_height="48dp"
+                android:layout_marginStart="45dp"
+                android:layout_marginTop="20dp"
+                android:layout_column="0"
+                app:srcCompat="@drawable/user" />
+
+            <EditText
+                android:id="@+id/editText"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_column="1"
+                android:layout_marginTop="30dp"
+                android:layout_marginEnd="80dp"
+                android:hint="请输入电子邮箱/手机号"
+                android:textSize="18sp"
+                android:textStyle="bold" />
+        </TableRow>
+
+        <TableRow
+            android:layout_width="match_parent"
+            android:layout_height="match_parent">
+            <ImageView
+                android:id="@+id/imageView7"
+                android:layout_width="50dp"
+                android:layout_height="48dp"
+                android:layout_marginStart="45dp"
+                android:layout_marginTop="25dp"
+                android:layout_column="0"
+                app:srcCompat="@drawable/password" />
+            <EditText
+                android:id="@+id/editText2"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="30dp"
+                android:layout_marginEnd="80dp"
+                android:textSize="18sp"
+                android:textStyle="bold"
+                android:layout_column="1"
+                android:hint="请输入密码" />
+        </TableRow>
+    </TableLayout>
+
+    <RelativeLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_marginTop="480dp">
+
+        <Button
+            android:id="@+id/buttonlogin"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignParentTop="true"
+            android:layout_marginLeft="80dp"
+            android:backgroundTint="#F16E01"
+            android:textColor="@android:color/white"
+            android:text="登录"
+            android:textSize="24sp" />
+        <Button
+            android:id="@+id/buttonregister"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignParentTop="true"
+            android:layout_toRightOf="@id/buttonlogin"
+            android:layout_marginLeft="80dp"
+            android:backgroundTint="#F16E01"
+            android:text="注册"
+            android:textColor="@android:color/white"
+            android:textColorLink="#3AB6C6"
+            android:textSize="24sp"
+            android:onClick="click"/>
+
+        <CheckBox
+            android:id="@+id/checkBox2"
+            android:layout_width="wrap_content"
+            android:layout_height="32dp"
+            android:layout_below="@id/buttonlogin"
+            android:layout_marginRight="90dp"
+            android:layout_toLeftOf="@id/textView4"
+            android:text="记住密码"
+            android:textSize="18sp" />
+        <TextView
+            android:id="@+id/textView4"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_below="@id/buttonregister"
+            android:layout_alignParentRight="true"
+            android:layout_marginEnd="55dp"
+            android:text="忘记密码 ?"
+            android:textSize="18sp" />
+        <TextView
+            android:id="@+id/textView5"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_below="@id/checkBox2"
+            android:layout_marginEnd="32dp"
+            android:layout_marginTop="20dp"
+            android:layout_centerHorizontal="true"
+            android:text="—— 第三方账号登录 ——"
+            android:textSize="20sp"/>
+        <ImageButton
+            android:id="@+id/imageButton1"
+            android:layout_width="40dp"
+            android:layout_height="46dp"
+            android:layout_below="@id/textView5"
+            android:layout_toLeftOf="@id/imageButton2"
+            android:layout_marginRight="40dp"
+            android:layout_marginTop="15dp"
+            app:srcCompat="@drawable/qq" />
+        <ImageButton
+            android:id="@+id/imageButton2"
+            android:layout_width="40dp"
+            android:layout_height="36dp"
+            android:layout_below="@id/textView5"
+            android:layout_marginTop="18dp"
+            android:layout_centerHorizontal="true"
+            app:srcCompat="@drawable/weichat" />
+        <ImageButton
+            android:id="@+id/imageButton3"
+            android:layout_width="40dp"
+            android:layout_height="36dp"
+            android:layout_below="@id/textView5"
+            android:layout_toRightOf="@id/imageButton2"
+            android:layout_marginLeft="40dp"
+            android:layout_marginTop="18dp"
+            app:srcCompat="@drawable/weibo" />
+        <CheckBox
+            android:id="@+id/checkBox"
+            android:layout_width="380dp"
+            android:layout_height="wrap_content"
+            android:layout_below="@id/imageButton3"
+            android:layout_centerHorizontal="true"
+            android:layout_marginTop="15dp"
+            android:text="同意《用户服务协议》及《基本功能隐私协议》"
+            android:textSize="16sp" />
+    </RelativeLayout>
+
+</androidx.constraintlayout.widget.ConstraintLayout>

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/res/layout/activity_main.xml

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".MainActivity"
+    android:background="@drawable/bg2">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical">
+
+        <Button
+            android:id="@+id/button"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="560dp"
+            android:layout_gravity="center"
+            android:textSize="24sp"
+            android:text="开启美食之旅"
+            android:backgroundTint="#F16E01"
+            android:textColor="@android:color/white"
+            android:onClick="click"/>
+
+
+    </LinearLayout>
+</androidx.constraintlayout.widget.ConstraintLayout>

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/res/layout/activity_register.xml

@@ -0,0 +1,234 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".RegisterActivity">
+
+    <RelativeLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+        <ImageView
+            android:id="@+id/imageView"
+            android:layout_width="wrap_content"
+            android:layout_height="150dp"
+            android:layout_alignParentTop="true"
+            app:srcCompat="@drawable/register" />
+
+        <RelativeLayout
+            android:layout_centerHorizontal="true"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_below="@id/imageView"
+            android:padding="30dp"
+            android:id="@+id/relativelayout2">
+
+            <TextView
+                android:id="@+id/username"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="用户名："
+                android:textSize="20sp" />
+            <EditText
+                android:id="@+id/usernamebox"
+                android:layout_width="200dp"
+                android:layout_height="wrap_content"
+                android:textSize="20sp"
+                android:layout_marginLeft="20dp"
+                android:background="@drawable/edittext_border"
+                android:layout_toRightOf="@id/username" />
+
+            <TextView
+                android:id="@+id/password"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="登录密码："
+                android:layout_below="@id/username"
+                android:layout_marginTop="30dp"
+                android:textSize="20sp" />
+
+            <EditText
+                android:id="@+id/passwordbox"
+                android:layout_width="200dp"
+                android:layout_height="wrap_content"
+                android:layout_below="@id/usernamebox"
+                android:layout_marginLeft="24dp"
+                android:layout_marginTop="35dp"
+                android:layout_toRightOf="@id/username"
+                android:background="@drawable/edittext_border"
+                android:textSize="20sp" />
+
+            <TextView
+                android:id="@+id/surepassword"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="30dp"
+                android:text="确认密码:"
+                android:layout_below="@id/password"
+                android:textSize="20sp" />
+
+            <EditText
+                android:id="@+id/surepasswordbox"
+                android:layout_width="200dp"
+                android:layout_height="wrap_content"
+                android:layout_below="@id/passwordbox"
+                android:layout_marginLeft="17dp"
+                android:layout_marginTop="27dp"
+                android:layout_toRightOf="@id/phone"
+                android:background="@drawable/edittext_border"
+                android:textSize="20sp" />
+
+            <TextView
+                android:id="@+id/phone"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="30dp"
+                android:text="手机号码:"
+                android:layout_below="@id/surepassword"
+                android:textSize="20sp" />
+
+            <EditText
+                android:id="@+id/phonebox"
+                android:layout_width="200dp"
+                android:layout_height="wrap_content"
+                android:layout_below="@id/surepasswordbox"
+                android:layout_marginLeft="21dp"
+                android:layout_marginTop="30dp"
+                android:layout_toRightOf="@id/phone"
+                android:background="@drawable/edittext_border"
+                android:textSize="20sp" />
+
+            <TextView
+                android:id="@+id/email"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="30dp"
+                android:text="电子邮箱:"
+                android:layout_below="@id/phonebox"
+                android:textSize="20sp" />
+
+            <EditText
+                android:id="@+id/emailbox"
+                android:layout_width="200dp"
+                android:layout_height="wrap_content"
+                android:layout_below="@id/phonebox"
+                android:layout_marginLeft="20dp"
+                android:layout_marginTop="38dp"
+                android:layout_toRightOf="@id/email"
+                android:background="@drawable/edittext_border"
+                android:textSize="20sp" />
+
+            <TextView
+                android:id="@+id/address"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="30dp"
+                android:text="所在地:"
+                android:layout_below="@id/email"
+                android:textSize="20sp" />
+
+            <EditText
+                android:id="@+id/addressbox"
+                android:layout_width="200dp"
+                android:layout_height="wrap_content"
+                android:layout_below="@id/emailbox"
+                android:layout_marginLeft="42dp"
+                android:layout_marginTop="27dp"
+                android:layout_toRightOf="@id/address"
+                android:background="@drawable/edittext_border"
+                android:textSize="20sp" />
+
+            <TextView
+                android:id="@+id/gender"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="30dp"
+                android:text="性别:"
+                android:layout_below="@id/address"
+                android:textSize="20sp" />
+            <RadioGroup
+                android:id="@+id/genderRadioGroup"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="20dp"
+                android:orientation="horizontal"
+                android:layout_below="@id/addressbox"
+                android:layout_toRightOf="@id/surepassword"
+                android:layout_marginLeft="18dp">
+
+                <RadioButton
+                    android:id="@+id/maleRadioButton"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="男"
+                    android:textSize="20sp" />
+
+                <RadioButton
+                    android:id="@+id/femaleRadioButton"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="女"
+                    android:textSize="20sp"
+                    android:layout_marginLeft="30dp"/>
+            </RadioGroup>
+
+            <TextView
+                android:id="@+id/taste"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_below="@id/gender"
+                android:layout_marginTop="30dp"
+                android:text="喜欢口味："
+                android:textSize="20sp"/>
+
+            <CheckBox
+                android:id="@+id/checkbox_sour"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_below="@id/genderRadioGroup"
+                android:layout_marginLeft="10dp"
+                android:layout_marginTop="13dp"
+                android:layout_toRightOf="@id/taste"
+                android:text="酸"
+                android:textSize="20sp" />
+
+            <CheckBox
+                android:id="@+id/checkbox_sweet"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_below="@id/genderRadioGroup"
+                android:layout_marginLeft="0dp"
+                android:layout_marginTop="13dp"
+                android:layout_toRightOf="@id/checkbox_sour"
+                android:text="甜"
+                android:textSize="20sp" />
+
+            <CheckBox
+                android:id="@+id/checkbox_spicy"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_below="@id/genderRadioGroup"
+                android:layout_marginLeft="1dp"
+                android:layout_marginTop="13dp"
+                android:layout_toRightOf="@id/checkbox_sweet"
+                android:text="辣"
+                android:textSize="20sp" />
+        </RelativeLayout>
+
+        <Button
+            android:id="@+id/referbutton"
+            android:layout_width="137dp"
+            android:layout_height="wrap_content"
+            android:layout_below="@id/relativelayout2"
+            android:layout_centerHorizontal="true"
+            android:backgroundTint="#FEA37C"
+            android:textSize="24sp"
+            android:text="提交"
+            android:textColor="@android:color/white"
+            android:onClick="click"/>
+
+    </RelativeLayout>
+</androidx.constraintlayout.widget.ConstraintLayout>

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/res/layout/activity_registerinformation.xml

@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".RegisterinformationActivity">
+    <RelativeLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+        <ImageView
+            android:id="@+id/informationimage"
+            android:layout_width="wrap_content"
+            android:layout_height="130dp"
+            android:layout_alignParentTop="true"
+            app:srcCompat="@drawable/information" />
+    <LinearLayout
+            android:id="@+id/linearlayout1"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="160dp"
+            android:orientation="vertical"
+            android:gravity="center_horizontal">
+         <TextView
+              android:id="@+id/show_content"
+              android:layout_width="wrap_content"
+              android:layout_height="wrap_content"
+              android:layout_gravity="center"
+              android:text="TextView"
+              android:textSize="20sp"
+              android:textColor="@android:color/black"/>
+    </LinearLayout>
+
+        <Button
+            android:id="@+id/gobackbutton"
+            android:layout_width="200dp"
+            android:layout_height="wrap_content"
+            android:backgroundTint="#FEA37C"
+            android:onClick="click"
+            android:text="返回登录页"
+            android:textColor="@android:color/white"
+            android:textSize="23sp"
+            android:layout_centerHorizontal="true"
+            android:layout_below="@id/linearlayout1"
+            android:layout_marginTop="20dp"/>
+    </RelativeLayout>
+</androidx.constraintlayout.widget.ConstraintLayout>

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/res/layout/content_nav.xml

@@ -0,0 +1,102 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="horizontal"
+    android:layout_marginBottom="50dp"
+
+   >
+   <LinearLayout
+       android:id="@+id/home"
+       android:layout_width="0dp"
+       android:layout_weight="1"
+       android:layout_height="wrap_content"
+       android:layout_gravity="bottom"
+       android:background="#F7F5BC"
+       android:orientation="vertical"
+       >
+        <ImageView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:layout_marginTop="2dp"
+            android:src="@drawable/home"/>
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:text="首页"
+            android:textColor="#707070"
+            android:textSize="18sp"/>
+   </LinearLayout>
+    <LinearLayout
+        android:id="@+id/food"
+        android:layout_width="0dp"
+        android:layout_weight="1"
+        android:layout_height="wrap_content"
+        android:background="#F7F5BC"
+        android:layout_gravity="bottom"
+        android:orientation="vertical"
+        >
+        <ImageView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:layout_marginTop="2dp"
+            android:src="@drawable/food"/>
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:text="分类"
+            android:textColor="#707070"
+            android:textSize="18sp"/>
+    </LinearLayout>
+    <LinearLayout
+        android:id="@+id/shopping"
+        android:layout_width="0dp"
+        android:layout_weight="1"
+        android:layout_gravity="bottom"
+        android:layout_height="wrap_content"
+        android:background="#F7F5BC"
+        android:orientation="vertical"
+        >
+        <ImageView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:layout_marginTop="2dp"
+            android:src="@drawable/shopping"/>
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:text="订单"
+            android:textColor="#707070"
+            android:textSize="18sp"/>
+    </LinearLayout>
+    <LinearLayout
+        android:id="@+id/person"
+        android:layout_width="0dp"
+        android:layout_weight="1"
+        android:layout_gravity="bottom"
+        android:layout_height="wrap_content"
+        android:background="#F7F5BC"
+        android:orientation="vertical"
+        >
+        <ImageView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:layout_marginTop="2dp"
+            android:src="@drawable/person"/>
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:text="我的"
+            android:textColor="#707070"
+            android:textSize="18sp"/>
+    </LinearLayout>
+</LinearLayout>

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/res/layout/fragment_food.xml

@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.appcompat.widget.LinearLayoutCompat xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    tools:context=".foodFragment">
+
+    <!-- TODO: Update blank fragment layout -->
+    <androidx.appcompat.widget.Toolbar
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="#FF9800"
+        android:textSize="30sp"
+        app:title="美食分类"
+        app:titleTextColor="@color/white"/>
+
+    <androidx.appcompat.widget.LinearLayoutCompat
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="horizontal">
+         <androidx.appcompat.widget.LinearLayoutCompat
+             android:layout_width="80dp"
+             android:layout_height="match_parent"
+             android:background="#F7F5BC">
+
+             <androidx.recyclerview.widget.RecyclerView
+                 android:id="@+id/foodleftRecyclerView"
+                 android:layout_width="match_parent"
+                 tools:listitem="@layout/item_left_food"
+                 app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
+                 android:layout_height="match_parent"/>
+
+         </androidx.appcompat.widget.LinearLayoutCompat>
+
+         <androidx.appcompat.widget.LinearLayoutCompat
+             android:layout_width="match_parent"
+             android:layout_height="match_parent">
+
+             <androidx.recyclerview.widget.RecyclerView
+                 android:id="@+id/foodrightRecyclerView"
+                 android:layout_width="match_parent"
+                 android:layout_height="match_parent"
+                 tools:listitem="@layout/item_right_food"
+                 app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"/>
+
+         </androidx.appcompat.widget.LinearLayoutCompat>
+    </androidx.appcompat.widget.LinearLayoutCompat>
+</androidx.appcompat.widget.LinearLayoutCompat>

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/res/layout/fragment_home.xml

@@ -0,0 +1,271 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:layout_marginTop="20dp"
+    tools:context=".homeFragment">
+
+
+    <FrameLayout
+        android:id="@+id/framlayout"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_weight="1"
+        android:background="#F7F5BC">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal">
+
+            <SearchView
+                android:id="@+id/searchView"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:focusable="false"
+                android:iconifiedByDefault="false"
+                android:queryHint="请输入搜索内容" />
+
+            <ImageView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:src="@drawable/xx"/>
+            <ImageView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:src="@drawable/gd1"
+                android:layout_marginRight="5dp"/>
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="210dp"
+            android:layout_marginTop="50dp"
+            android:background="@drawable/seven">
+        </LinearLayout>
+
+        <FrameLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="20dp">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="250dp"
+                android:orientation="horizontal">
+
+                <LinearLayout
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:gravity="center"
+                    android:orientation="vertical">
+
+                    <ImageView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:src="@drawable/jiancan" />
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="简餐"
+                        android:textColor="#FFBF00"
+                        android:textSize="20sp" />
+                </LinearLayout>
+
+                <LinearLayout
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:gravity="center"
+                    android:orientation="vertical">
+
+                    <ImageView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:src="@drawable/jiancan" />
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="简餐"
+                        android:textColor="#FFBF00"
+                        android:textSize="20sp" />
+                </LinearLayout>
+
+                <LinearLayout
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:gravity="center"
+                    android:orientation="vertical">
+
+                    <ImageView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:src="@drawable/jiancan" />
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="简餐"
+                        android:textColor="#FFBF00"
+                        android:textSize="20sp" />
+                </LinearLayout>
+
+                <LinearLayout
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:gravity="center"
+                    android:orientation="vertical">
+
+                    <ImageView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:src="@drawable/jiancan" />
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="简餐"
+                        android:textColor="#FFBF00"
+                        android:textSize="20sp" />
+                </LinearLayout>
+            </LinearLayout>
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="330dp"
+                android:orientation="horizontal">
+
+                <LinearLayout
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:gravity="center"
+                    android:orientation="vertical">
+
+                    <ImageView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:src="@drawable/jiancan" />
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="简餐"
+                        android:textColor="#FFBF00"
+                        android:textSize="20sp" />
+                </LinearLayout>
+
+                <LinearLayout
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:gravity="center"
+                    android:orientation="vertical">
+
+                    <ImageView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:src="@drawable/jiancan" />
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="简餐"
+                        android:textColor="#FFBF00"
+                        android:textSize="20sp" />
+                </LinearLayout>
+
+                <LinearLayout
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:gravity="center"
+                    android:orientation="vertical">
+
+                    <ImageView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:src="@drawable/jiancan" />
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="简餐"
+                        android:textColor="#FFBF00"
+                        android:textSize="20sp" />
+                </LinearLayout>
+
+                <LinearLayout
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:gravity="center"
+                    android:orientation="vertical">
+
+                    <ImageView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:src="@drawable/jiancan" />
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="简餐"
+                        android:textColor="#FFBF00"
+                        android:textSize="20sp" />
+                </LinearLayout>
+            </LinearLayout>
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="horizontal">
+
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginLeft="15dp"
+                    android:layout_marginTop="400dp"
+                    android:text="美食榜单"
+                    android:textColor="#FB8612"
+                    android:textStyle="bold"
+                    android:textSize="25sp"/>
+
+                <ImageView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_gravity="bottom"
+                    android:layout_marginRight="20dp"
+                    android:src="@drawable/gd2" />
+            </LinearLayout>
+
+
+            <RelativeLayout
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:background="#F1EE8D"
+                android:layout_marginTop="450dp">
+
+                <ListView
+                    android:id="@+id/homelistview"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:background="#F1EE8D"
+                    android:padding="8dp"/>
+
+            </RelativeLayout>
+
+        </FrameLayout>
+    </FrameLayout>
+
+
+</LinearLayout>

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/res/layout/fragment_person.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".personFragment">
+
+    <!-- TODO: Update blank fragment layout -->
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:textSize="30sp"
+        android:text="个人中心"
+        android:layout_marginTop="50dp"/>
+
+</FrameLayout>

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/res/layout/fragment_shop.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".shopFragment">
+
+    <!-- TODO: Update blank fragment layout -->
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:textSize="30sp"
+        android:text="订单"
+        android:layout_marginTop="50dp"/>
+
+</FrameLayout>

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/res/layout/homelist_item_layout.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:gravity="center_horizontal">
+        <ImageView
+            android:id="@+id/imageview"
+            android:layout_width="300dp"
+            android:layout_height="250dp"
+            android:layout_margin="8dp"/>
+</LinearLayout>

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/res/layout/item_left_food.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.appcompat.widget.LinearLayoutCompat xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content">
+
+    <TextView
+        android:id="@+id/name"
+        android:paddingLeft="10dp"
+        android:layout_width="100dp"
+        android:layout_height="50dp"
+        android:gravity="center_vertical"
+        android:text="水果"/>
+
+
+
+</androidx.appcompat.widget.LinearLayoutCompat>

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/res/layout/item_right_food.xml

@@ -0,0 +1,76 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.appcompat.widget.LinearLayoutCompat xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content">
+
+   <androidx.appcompat.widget.LinearLayoutCompat
+       android:layout_width="match_parent"
+       android:layout_height="wrap_content"
+       android:layout_margin="10dp">
+       <ImageView
+           android:id="@+id/food_img"
+           android:layout_width="100dp"
+           android:layout_height="100dp"
+           android:src="@drawable/noodles"
+           android:scaleType="centerCrop"/>
+
+       <androidx.appcompat.widget.LinearLayoutCompat
+           android:layout_marginLeft="10dp"
+           android:layout_width="match_parent"
+           android:layout_height="match_parent"
+           android:orientation="vertical">
+
+           <TextView
+               android:id="@+id/food_title"
+               android:layout_width="wrap_content"
+               android:layout_height="wrap_content"
+               android:singleLine="true"
+               android:textColor="#333"
+               android:text="尝尝我们的招牌牛肉面，每一口都是对味蕾的极致诱惑！新鲜的牛肉片搭配着细腻的面条，汤汁鲜美浓郁，回味无穷。"/>
+
+           <TextView
+               android:id="@+id/food_details"
+               android:layout_marginTop="10dp"
+               android:layout_width="match_parent"
+               android:layout_height="wrap_content"
+               android:maxLines="1"
+               android:textSize="12sp"
+               android:text="口味：酸辣。产地：湖南"/>
+
+           <androidx.appcompat.widget.LinearLayoutCompat
+               android:layout_width="wrap_content"
+               android:layout_height="wrap_content">
+
+               <ImageView
+                   android:layout_width="80px"
+                   android:layout_height="80px"
+                   android:layout_marginTop="16dp"
+                   android:src="@drawable/money2"/>
+
+               <TextView
+                   android:id="@+id/food_price"
+                   android:layout_width="wrap_content"
+                   android:layout_height="wrap_content"
+                   android:textSize="20sp"
+                   android:layout_marginTop="16dp"
+                   android:text="19"
+                   android:textStyle="bold"
+                   android:textColor="#D3277C"/>
+
+               <TextView
+                   android:id="@+id/food_next"
+                   android:layout_width="wrap_content"
+                   android:layout_height="wrap_content"
+                   android:textSize="20sp"
+                   android:layout_marginTop="16dp"
+                   android:text="元/1斤"
+                   android:textStyle="bold"
+                   android:textColor="#D3277C"/>
+
+           </androidx.appcompat.widget.LinearLayoutCompat>
+
+
+       </androidx.appcompat.widget.LinearLayoutCompat>
+   </androidx.appcompat.widget.LinearLayoutCompat>
+
+</androidx.appcompat.widget.LinearLayoutCompat>

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/res/menu/main.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+    <item
+        android:id="@+id/navigation_home"
+        android:icon="@drawable/home"
+        android:title="首页" />
+
+    <item
+        android:id="@+id/navigation_dashboard"
+        android:icon="@drawable/food"
+        android:title="分类" />
+
+    <item
+        android:id="@+id/navigation_notifications"
+        android:icon="@drawable/shopping"
+        android:title="购物车" />
+    <item
+        android:id="@+id/navigation_blank"
+        android:icon="@drawable/person"
+        android:title="我的" />
+
+</menu>

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

DeliciousFoodApp--杨松林第四次实验代码/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>