蒋迎晨第四次实验代码

DeliciousFoodApp——蒋迎晨第四次实验代码/.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——蒋迎晨第四次实验代码/.idea/.gitignore

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

DeliciousFoodApp——蒋迎晨第四次实验代码/.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——蒋迎晨第四次实验代码/.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\Cindy\.android\avd\Pixel_7_Pro_API_29.avd" />
+                </Key>
+              </deviceKey>
+            </Target>
+          </targetSelectedWithDropDown>
+          <timeTargetWasSelectedWithDropDown value="2024-03-26T00:25:29.443954100Z" />
+        </State>
+      </entry>
+    </value>
+  </component>
+</project>

DeliciousFoodApp——蒋迎晨第四次实验代码/.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——蒋迎晨第四次实验代码/.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——蒋迎晨第四次实验代码/.idea/misc.xml

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+<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="0.5745554035567716" />
+      </ProjectState>
+    </option>
+  </component>
+</project>

DeliciousFoodApp——蒋迎晨第四次实验代码/app/.gitignore

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+/build

DeliciousFoodApp——蒋迎晨第四次实验代码/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——蒋迎晨第四次实验代码/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——蒋迎晨第四次实验代码/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——蒋迎晨第四次实验代码/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——蒋迎晨第四次实验代码/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——蒋迎晨第四次实验代码/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——蒋迎晨第四次实验代码/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——蒋迎晨第四次实验代码/app/src/main/java/com/example/deliciousfoodapp/MyAdapter.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 java.util.List;
+import java.util.Map;
+
+public class MyAdapter extends BaseAdapter {
+    private List<Map<String, Object>> datas;
+    private Context mContext;
+
+    public MyAdapter(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.list_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——蒋迎晨第四次实验代码/app/src/main/java/com/example/deliciousfoodapp/NewAdapter.java

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+package com.example.deliciousfoodapp;
+
+import android.content.Context;
+import android.text.Layout;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.BaseAdapter;
+import android.widget.Button;
+import android.widget.ImageView;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import com.example.deliciousfoodapp.R;
+
+import java.util.List;
+import java.util.Map;
+
+public class NewAdapter extends BaseAdapter {
+    List<Map<String,Object>> datas;
+    Context mContext;
+    NewAdapter(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.list_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——蒋迎晨第四次实验代码/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——蒋迎晨第四次实验代码/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——蒋迎晨第四次实验代码/app/src/main/java/com/example/deliciousfoodapp/adapter/LeftListAdapter.java

@@ -0,0 +1,84 @@
+package com.example.deliciousfoodapp.adapter;
+
+import android.annotation.SuppressLint;
+import android.view.LayoutInflater;
+import android.os.Bundle;
+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 LeftListAdapter extends RecyclerView.Adapter<LeftListAdapter.MyHolder>{
+
+    private List<String> dataList = new ArrayList<>();
+    private int currentIndex = 0;
+
+    public LeftListAdapter(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.left_list_item,null);
+        return new MyHolder(view);
+    }
+
+    @Override
+    @SuppressLint("RecyclerView")
+    public void onBindViewHolder(@NonNull MyHolder holder, int position) {
+        //绑定数据
+        String name = dataList.get(position);
+        holder.tv_name.setText(name);
+
+        //分类的点击事件
+        holder.itemView.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                if(null != mLeftListOnClickItemListener){
+                    mLeftListOnClickItemListener.onItemClick(position);
+                }
+            }
+        });
+
+        if (currentIndex == position){
+            holder.itemView.setBackgroundResource(R.drawable.type_select_bg);
+        }else {
+            holder.itemView.setBackgroundResource(R.drawable.type_no_select_bg);
+        }
+
+    }
+
+    @Override
+    public int getItemCount() {
+        return dataList.size();
+    }
+
+    static class MyHolder extends RecyclerView.ViewHolder{
+        TextView tv_name;
+        public MyHolder(@NonNull View itemView){
+            super(itemView);
+            tv_name = itemView.findViewById(R.id.name);
+        }
+    }
+    private LeftListOnClickItemListener mLeftListOnClickItemListener;
+
+    public void setLeftListOnClickItemListener(LeftListOnClickItemListener leftListOnClickItemListener){
+        mLeftListOnClickItemListener = leftListOnClickItemListener;
+    }
+    public interface LeftListOnClickItemListener{
+        void onItemClick(int position);
+    }
+
+    public void setCurrentIndex(int position){
+        this.currentIndex = position;
+        notifyDataSetChanged();
+    }
+}

DeliciousFoodApp——蒋迎晨第四次实验代码/app/src/main/java/com/example/deliciousfoodapp/adapter/RightListAdapter.java

@@ -0,0 +1,65 @@
+package com.example.deliciousfoodapp.adapter;
+
+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.Product;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class RightListAdapter extends RecyclerView.Adapter<RightListAdapter.MyHolder> {
+
+    private List<Product> mProducts = new ArrayList<>();
+    public void setListData(List<Product> list){
+        this.mProducts = list;
+        notifyDataSetChanged();
+    }
+    @NonNull
+    @Override
+    public MyHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
+
+        //加载布局
+        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.right_list_item,null);
+        return new MyHolder(view);
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull MyHolder holder, int position) {
+        //绑定数据
+        Product product = mProducts.get(position);
+        holder.product_img.setImageResource(product.getProduct_img());
+        holder.product_title.setText(product.getProduct_title());
+        holder.product_price.setText(product.getProduct_price());
+        holder.product_shop.setText(product.getProduct_shop());
+        holder.product_produce.setText(product.getProduct_produce());
+    }
+
+    @Override
+    public int getItemCount() {
+        return mProducts.size();
+    }
+
+    static class MyHolder extends RecyclerView.ViewHolder{
+        ImageView product_img;
+        TextView product_title;
+        TextView product_price;
+        TextView product_shop;
+        TextView product_produce;
+        public MyHolder(@NonNull View itemView) {
+            super(itemView);
+            product_img = itemView.findViewById(R.id.product_img);
+            product_title = itemView.findViewById(R.id.product_title);
+            product_price = itemView.findViewById(R.id.product_price);
+            product_shop = itemView.findViewById(R.id.product_shop);
+            product_produce = itemView.findViewById(R.id.product_produce);
+        }
+    }
+}

DeliciousFoodApp——蒋迎晨第四次实验代码/app/src/main/java/com/example/deliciousfoodapp/entity/DataService.java

@@ -0,0 +1,167 @@
+package com.example.deliciousfoodapp.entity;
+
+import com.example.deliciousfoodapp.R;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class DataService {
+    /**
+     * 模拟提供数据
+     */
+    public static List<Product> getListData(int position) {
+        List<Product> list = new ArrayList<>();
+        if (position == 0) {
+            list.add(new Product(0, R.drawable.food1, "土豆炖牛肉",
+                    "月4000+  人均  ¥45", "店铺：小碗菜",
+                    "食品介绍：土豆炖牛肉的汤汁经过长时间的炖煮，充分融合了牛肉和土豆的鲜美，口感浓郁，喝上一口满满的幸福感。"));
+            list.add(new Product(1, R.drawable.food2, "糖醋里脊",
+                    "月售6000+  人均  ¥26", "店铺：饭满鲜",
+                    "食品介绍：选用新西兰猪肋条肉为原料，辅以绍兴香醋、东海盐等佐料，采用传统与现代相结合的制作方法，成品色泽红润明亮，外表柔软滑润，酱汁酸甜可口，夹心香脆可口。"));
+            list.add(new Product(2, R.drawable.food3, "酸菜鱼",
+                    "月售1000+  人均  ¥35", "店铺：花园食府",
+                    "食品介绍：酸菜鱼，酸爽可口，鱼肉紧而嫩；水煮鱼，汤白如玉，辣中有香，香里带甜，真乃人间美味。"));
+            list.add(new Product(3, R.drawable.food4, "宫保鸡丁",
+                    "月售1000+  人均  ¥46", "店铺：百味餐厅",
+                    "食品介绍：口感丰富多样，层次分明。鸡肉的嫩滑与花生米的脆香交织在一起，给人带来丰富的口感体验。在咀嚼过程中，辣椒的辣味逐渐释放出来，让人感受到满口的麻辣与香醇。"));
+            list.add(new Product(4, R.drawable.food5, "擂椒拌饭",
+                    "月售1000+  人均  ¥64", "店铺：西苑餐厅",
+                    "食品介绍：它鲜嫩多汁，酸辣开胃，方便快捷，让人闻着味道就会忍不住流下口水，尝上一口就会忍不住吃完一整碗。"));
+            list.add(new Product(5, R.drawable.food6, "蜜汁鸡腿肉轻食健康餐",
+                    "月售1000+  人均  ¥37", "店铺：和味餐厅",
+                    "食品介绍：蜜汁鸡腿肉，肉质鲜嫩，口感十分的好。非常健康、低脂，很适合减肥的人。"));
+            list.add(new Product(6, R.drawable.food7, "招牌牛肉鸡胸双拼沙拉",
+                    "月售1000+  人均  ¥29", "店铺：福华餐厅",
+                    "食品介绍：味道很好，食材新鲜，玉米南瓜花菜都很甜，肉也不错，糙米很香，有八宝粥那味，真不错。非常健康、低脂，很适合减肥的人。"));
+            list.add(new Product(7, R.drawable.food8, "肉沫茄子盖饭",
+                    "月售1000+  人均  ¥36", "店铺：聚仙楼饭庄",
+                    "食品介绍：软糯入味的茄子拌上米饭，酱汁浓郁，一次一大碗都不够，真是好吃到舔碗底！"));
+        } else if (position == 1) {
+            list.add(new Product(8, R.drawable.food9, "烤串",
+                    "月售1000+  人均  ¥57", "店铺：嗨撸",
+                    "食品介绍：肉质鲜嫩，口感极佳。 食用后满口余香，令人回味无穷。"));
+            list.add(new Product(9, R.drawable.food10, "烤羊肉",
+                    "月售1000+  人均  ¥54", "店铺：碳夫",
+                    "食品介绍：烤制技巧精湛，烤出的肉色香味俱佳，每一口都充满了丰富的口感和幸福感。"));
+            list.add(new Product(10, R.drawable.food9, "烤串",
+                    "月售1000+  人均  ¥46", "店铺：火遍天",
+                    "食品介绍：肉质鲜嫩，口感极佳。 食用后满口余香，令人回味无穷。"));
+            list.add(new Product(11, R.drawable.food10, "烤羊肉",
+                    "月售1000+  人均  ¥53", "店铺：炉宗师",
+                    "食品介绍：烤制技巧精湛，烤出的肉色香味俱，每一口都充满了丰富的口感和幸福感。"));
+            list.add(new Product(12, R.drawable.food9, "烤串",
+                    "月售1000+  人均  ¥35", "店铺：海味轩",
+                    "食品介绍：肉质鲜嫩，口感极佳。 食用后满口余香，令人回味无穷。"));
+            list.add(new Product(13, R.drawable.food10, "烤羊肉",
+                    "月售1000+  人均  ¥48", "店铺：虾滋味",
+                    "食品介绍：烤制技巧精湛，烤出的肉色香味俱，每一口都充满了丰富的口感和幸福感。"));
+            list.add(new Product(14, R.drawable.food9, "烤串",
+                    "月售1000+  人均  ¥37", "店铺：极之宴",
+                    "食品介绍：肉质鲜嫩，口感极佳。 食用后满口余香，令人回味无穷。"));
+            list.add(new Product(15, R.drawable.food10, "烤羊肉",
+                    "月售1000+  人均  ¥56", "店铺：整两串",
+                    "食品介绍：烤制技巧精湛，烤出的肉色香味俱，每一口都充满了丰富的口感和幸福感。"));
+        } else if (position == 2) {
+            list.add(new Product(16, R.drawable.food11, "卤鸭脖",
+                    "月售1000+  人均  ¥48", "店铺：卤满满",
+                    "食品介绍：卤鸭脖口感恰到好处，辣味十足，让人回味无穷。"));
+            list.add(new Product(17, R.drawable.food12, "卤鸡爪",
+                    "月售1000+  人均  ¥54", "店铺：御满香",
+                    "食品介绍：卤鸡爪口感软糯，香味通透，入口即化，带有蒜的香味和微甜的口感，让人回味无穷。"));
+            list.add(new Product(18, R.drawable.food11, "卤鸭脖",
+                    "月售1000+  人均  ¥36", "店铺：卤满满",
+                    "食品介绍：卤鸭脖口感恰到好处，辣味十足，让人回味无穷。"));
+            list.add(new Product(19, R.drawable.food12, "卤鸡爪",
+                    "月售1000+  人均  ¥78", "店铺：御满香",
+                    "食品介绍：卤鸡爪口感软糯，香味通透，入口即化，带有蒜的香味和微甜的口感，让人回味无穷。"));
+            list.add(new Product(20, R.drawable.food11, "卤鸭脖",
+                    "月售1000+  人均  ¥39", "店铺：卤满满",
+                    "食品介绍：卤鸭脖口感恰到好处，辣味十足，让人回味无穷。"));
+            list.add(new Product(21, R.drawable.food12, "卤鸡爪",
+                    "月售1000+  人均  ¥36", "店铺：御满香",
+                    "食品介绍：卤鸡爪口感软糯，香味通透，入口即化，带有蒜的香味和微甜的口感，让人回味无穷。"));
+            list.add(new Product(22, R.drawable.food11, "卤鸭脖",
+                    "月售1000+  人均  ¥65", "店铺：卤满满",
+                    "食品介绍：卤鸭脖口感恰到好处，辣味十足，让人回味无穷。"));
+            list.add(new Product(23, R.drawable.food12, "卤鸡爪",
+                    "月售1000+  人均  ¥63", "店铺：御满香",
+                    "食品介绍：卤鸡爪口感软糯，香味通透，入口即化，带有蒜的香味和微甜的口感，让人回味无穷。"));
+        } else if (position == 3) {
+            list.add(new Product(24, R.drawable.food13, "西红柿鸡蛋面",
+                    "月售1000+  人均  ¥47", "店铺：一面之缘",
+                    "食品介绍：西红柿鸡蛋面不仅口感美味，而且营养丰富。西红柿含有丰富的胡萝卜素、维生素C和B族维生素，以及番茄红素，有助于抗衰老和预防心血管疾病。"));
+            list.add(new Product(25, R.drawable.food14, "西安臊子面",
+                    "月售1000+  人均  ¥38", "店铺：尚面膳食",
+                    "食品介绍：是陕西地区的特色风味小吃，以其独特的口感和丰富的文化内涵而闻名。它是一种细长匀称的面条，通常薄筋光且透亮，味道以酸辣为主。"));
+            list.add(new Product(26, R.drawable.food13, "西红柿鸡蛋面",
+                    "月售1000+  人均  ¥29", "店铺：一面之缘",
+                    "食品介绍：西红柿鸡蛋面不仅口感美味，而且营养丰富。西红柿含有丰富的胡萝卜素、维生素C和B族维生素，以及番茄红素，有助于抗衰老和预防心血管疾病。"));
+            list.add(new Product(27, R.drawable.food14, "西安臊子面",
+                    "月售1000+  人均  ¥26", "店铺：尚面膳食",
+                    "食品介绍：是陕西地区的特色风味小吃，以其独特的口感和丰富的文化内涵而闻名。它是一种细长匀称的面条，通常薄筋光且透亮，味道以酸辣为主。"));
+            list.add(new Product(28, R.drawable.food13, "西红柿鸡蛋面",
+                    "月售1000+  人均  ¥54", "店铺：一面之缘",
+                    "食品介绍：西红柿鸡蛋面不仅口感美味，而且营养丰富。西红柿含有丰富的胡萝卜素、维生素C和B族维生素，以及番茄红素，有助于抗衰老和预防心血管疾病。"));
+            list.add(new Product(29, R.drawable.food14, "西安臊子面",
+                    "月售1000+  人均  ¥43", "店铺：尚面膳食",
+                    "食品介绍：是陕西地区的特色风味小吃，以其独特的口感和丰富的文化内涵而闻名。它是一种细长匀称的面条，通常薄筋光且透亮，味道以酸辣为主。"));
+            list.add(new Product(30, R.drawable.food13, "西红柿鸡蛋面",
+                    "月售1000+  人均  ¥42", "店铺：一面之缘",
+                    "食品介绍：西红柿鸡蛋面不仅口感美味，而且营养丰富。西红柿含有丰富的胡萝卜素、维生素C和B族维生素，以及番茄红素，有助于抗衰老和预防心血管疾病。"));
+            list.add(new Product(31, R.drawable.food14, "西安臊子面",
+                    "月售1000+  人均  ¥31", "店铺：尚面膳食",
+                    "食品介绍：是陕西地区的特色风味小吃，以其独特的口感和丰富的文化内涵而闻名。它是一种细长匀称的面条，通常薄筋光且透亮，味道以酸辣为主。"));
+        } else if (position == 4) {
+            list.add(new Product(32, R.drawable.food15, "蛋挞",
+                    "月售1000+  人均  ¥41", "店铺：壹甜半品",
+                    "食品介绍：蛋挞皮口感细腻，入口有淡淡的蛋香味，外面包裹一圈白色芝士，中间夹着奶黄馅料，轻轻一咬，酥脆的底层便露出来。"));
+            list.add(new Product(33, R.drawable.food16, "草莓千层蛋糕",
+                    "月售1000+  人均  ¥24", "店铺：甜小白",
+                    "食品介绍：草莓千层口感太棒了，奶香和草莓的酸甜融合的太完美啦‼而且不是那种很甜腻的甜品。"));
+            list.add(new Product(34, R.drawable.food15, "蛋挞",
+                    "月售1000+  人均  ¥48", "店铺：壹甜半品",
+                    "食品介绍：蛋挞皮口感细腻，入口有淡淡的蛋香味，外面包裹一圈白色芝士，中间夹着奶黄馅料，轻轻一咬，酥脆的底层便露出来。"));
+            list.add(new Product(35, R.drawable.food16, "草莓千层蛋糕",
+                    "月售1000+  人均  ¥39", "店铺：甜小白",
+                    "食品介绍：草莓千层口感太棒了，奶香和草莓的酸甜融合的太完美啦‼而且不是那种很甜腻的甜品。便"));
+            list.add(new Product(36, R.drawable.food15, "蛋挞",
+                    "月售1000+  人均  ¥39", "店铺：壹甜半品",
+                    "食品介绍：蛋挞皮口感细腻，入口有淡淡的蛋香味，外面包裹一圈白色芝士，中间夹着奶黄馅料，轻轻一咬，酥脆的底层便露出来。"));
+            list.add(new Product(37, R.drawable.food16, "草莓千层蛋糕",
+                    "月售1000+  人均  ¥84", "店铺：甜小白",
+                    "食品介绍：草莓千层口感太棒了，奶香和草莓的酸甜融合的太完美啦‼而且不是那种很甜腻的甜品。便"));
+            list.add(new Product(38, R.drawable.food15, "蛋挞",
+                    "月售1000+  人均  ¥28", "店铺：壹甜半品",
+                    "食品介绍：蛋挞皮口感细腻，入口有淡淡的蛋香味，外面包裹一圈白色芝士，中间夹着奶黄馅料，轻轻一咬，酥脆的底层便露出来。"));
+            list.add(new Product(39, R.drawable.food16, "草莓千层蛋糕",
+                    "月售1000+  人均  ¥38", "店铺：甜小白",
+                    "食品介绍：草莓千层口感太棒了，奶香和草莓的酸甜融合的太完美啦‼而且不是那种很甜腻的甜品。"));
+        } else {
+            list.add(new Product(40, R.drawable.food17, "珍珠奶茶",
+                    "月售1000+  人均  ¥9", "店铺：果然奶茶店",
+                    "食品介绍：珍珠奶茶的口感层次分明，既有珍珠的嚼劲，又有茶香的悠扬，还有牛奶的香甜，使得这款饮料如此令人沉醉。"));
+            list.add(new Product(41, R.drawable.food18, "柠檬水",
+                    "月售1000+  人均  ¥5", "店铺：奶香当铺",
+                    "食品介绍：柠檬水的味道酸甜可口,给人一种清新的感觉。柠檬中所含的柠檬酸能够增加食欲,让人口水直流。无论是夏天炎热的时候,还是寒冷的冬天,一杯柠檬水都能够让人心旷神怡。"));
+            list.add(new Product(42, R.drawable.food17, "珍珠奶茶",
+                    "月售1000+  人均  ¥9", "店铺：果然奶茶店",
+                    "食品介绍：珍珠奶茶的口感层次分明，既有珍珠的嚼劲，又有茶香的悠扬，还有牛奶的香甜，使得这款饮料如此令人沉醉。"));
+            list.add(new Product(43, R.drawable.food18, "柠檬水",
+                    "月售1000+  人均  ¥5", "店铺：奶香当铺",
+                    "食品介绍：柠檬水的味道酸甜可口,给人一种清新的感觉。柠檬中所含的柠檬酸能够增加食欲,让人口水直流。无论是夏天炎热的时候,还是寒冷的冬天,一杯柠檬水都能够让人心旷神怡。"));
+            list.add(new Product(44, R.drawable.food17, "珍珠奶茶",
+                    "月售1000+  人均  ¥9", "店铺：果然奶茶店",
+                    "食品介绍：珍珠奶茶的口感层次分明，既有珍珠的嚼劲，又有茶香的悠扬，还有牛奶的香甜，使得这款饮料如此令人沉醉。便"));
+            list.add(new Product(45, R.drawable.food18, "柠檬水",
+                    "月售1000+  人均  ¥5", "店铺：奶香当铺",
+                    "食品介绍：柠檬水的味道酸甜可口,给人一种清新的感觉。柠檬中所含的柠檬酸能够增加食欲,让人口水直流。无论是夏天炎热的时候,还是寒冷的冬天,一杯柠檬水都能够让人心旷神怡。"));
+            list.add(new Product(46, R.drawable.food17, "珍珠奶茶",
+                    "月售1000+  人均  ¥9", "店铺：果然奶茶店店",
+                    "食品介绍：珍珠奶茶的口感层次分明，既有珍珠的嚼劲，又有茶香的悠扬，还有牛奶的香甜，使得这款饮料如此令人沉醉。"));
+            list.add(new Product(47, R.drawable.food18, "柠檬水",
+                    "月售1000+  人均  ¥5", "店铺：奶香当铺",
+                    "食品介绍：柠檬水的味道酸甜可口,给人一种清新的感觉。柠檬中所含的柠檬酸能够增加食欲,让人口水直流。无论是夏天炎热的时候,还是寒冷的冬天,一杯柠檬水都能够让人心旷神怡。"));
+        }
+            return list;
+        }
+    }

DeliciousFoodApp——蒋迎晨第四次实验代码/app/src/main/java/com/example/deliciousfoodapp/entity/Product.java

@@ -0,0 +1,67 @@
+package com.example.deliciousfoodapp.entity;
+
+public class Product {
+    private int product_id;
+    private int product_img;
+    private String product_title;
+    private String product_price;
+    private String product_shop;
+    private String product_produce;
+
+
+    public Product(int productID, int productImg, String productTitle, String productPrice, String productShop, String productProduce) {
+        product_id = productID;
+        product_img = productImg;
+        product_title = productTitle;
+        product_price = productPrice;
+        product_shop = productShop;
+        product_produce = productProduce;
+    }
+
+    public int getProduct_id(){
+        return product_id;
+    }
+
+    public void setProduct_id(int product_id) {
+        this.product_id = product_id;
+    }
+
+    public int getProduct_img() {
+        return product_img;
+    }
+
+    public void setProduct_img(int product_img) {
+        this.product_img = product_img;
+    }
+    public String getProduct_title() {
+        return product_title;
+    }
+
+    public void setProduct_title(String product_title) {
+        this.product_title = product_title;
+    }
+
+    public String getProduct_price() {
+        return product_price;
+    }
+
+    public void setProduct_price(String product_price) {
+        this.product_price = product_price;
+    }
+
+    public String getProduct_shop() {
+        return product_shop;
+    }
+
+    public void setProduct_shop(String product_shop) {
+        this.product_shop = product_shop;
+    }
+
+    public String getProduct_produce() {
+        return product_produce;
+    }
+
+    public void setProduct_produce(String product_produce) {
+        this.product_produce = product_produce;
+    }
+}

DeliciousFoodApp——蒋迎晨第四次实验代码/app/src/main/java/com/example/deliciousfoodapp/foodFragment.java

@@ -0,0 +1,77 @@
+package com.example.deliciousfoodapp;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.annotation.NonNull;
+import androidx.fragment.app.Fragment;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.example.deliciousfoodapp.adapter.LeftListAdapter;
+import com.example.deliciousfoodapp.adapter.RightListAdapter;
+import com.example.deliciousfoodapp.entity.DataService;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class foodFragment extends Fragment {
+    private View rootView;
+    private RecyclerView LeftRecyclerView;
+    private RecyclerView RightRecyclerView;
+    private LeftListAdapter mLeftListAdapter;
+    private RightListAdapter mRightListAdapter;
+    private List<String> leftDataList = new ArrayList<>();
+
+    public foodFragment() {
+
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater,ViewGroup container,Bundle saveInstanceState){
+        rootView = inflater.inflate(R.layout.fragment_food,container,false);
+        //初始化控件
+        LeftRecyclerView=rootView.findViewById(R.id.leftlist);
+        RightRecyclerView=rootView.findViewById(R.id.rightlist);
+
+        return rootView;
+    }
+
+    @Override
+    public void onActivityCreated(@NonNull Bundle saveInstanceState) {
+        super.onActivityCreated(saveInstanceState);
+
+        leftDataList.add("简餐");
+        leftDataList.add("烧烤");
+        leftDataList.add("卤味");
+        leftDataList.add("面条");
+        leftDataList.add("甜品");
+        leftDataList.add("奶茶饮料");
+
+        mLeftListAdapter = new LeftListAdapter(leftDataList);
+        LeftRecyclerView.setAdapter(mLeftListAdapter);
+
+        mRightListAdapter = new RightListAdapter();
+        RightRecyclerView.setAdapter(mRightListAdapter);
+
+        //默认加载食品数据
+        mRightListAdapter.setListData(DataService.getListData(0));
+
+        //recyclerView点击事件
+        mLeftListAdapter.setLeftListOnClickItemListener(new LeftListAdapter.LeftListOnClickItemListener(){
+            @Override
+            public void onItemClick(int position){
+                mLeftListAdapter.setCurrentIndex(position);
+
+                //点击左侧分类切换对应的列表数据
+                mRightListAdapter.setListData(DataService.getListData(position));
+            }
+        });
+
+    }
+
+
+
+
+}

DeliciousFoodApp——蒋迎晨第四次实验代码/app/src/main/java/com/example/deliciousfoodapp/homeFragment.java

@@ -0,0 +1,64 @@
+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 java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+
+public class homeFragment extends Fragment {
+    private ListView mListView;
+    private NewAdapter 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.listview);
+        myAdapter = new NewAdapter(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——蒋迎晨第四次实验代码/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——蒋迎晨第四次实验代码/app/src/main/java/com/example/deliciousfoodapp/shopFragment.java

@@ -0,0 +1,25 @@
+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;
+
+
+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——蒋迎晨第四次实验代码/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——蒋迎晨第四次实验代码/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——蒋迎晨第四次实验代码/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——蒋迎晨第四次实验代码/app/src/main/res/drawable/type_no_select_bg.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <item>
+        <shape>
+            <solid android:color="#F1EE8D"/>
+        </shape>
+    </item>
+
+</layer-list>

DeliciousFoodApp——蒋迎晨第四次实验代码/app/src/main/res/drawable/type_select_bg.xml

@@ -0,0 +1,14 @@
+<?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>
+    <item android:top="10dp" android:bottom="10dp" android:right="96dp">
+        <shape>
+            <solid android:color="@color/orange"/>
+        </shape>
+    </item>
+</layer-list>

DeliciousFoodApp——蒋迎晨第四次实验代码/app/src/main/res/layout/activity_index.xml

@@ -0,0 +1,24 @@
+<?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:background="#F7F5BC"
+        android:layout_weight="1">
+    </FrameLayout>
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content">
+        <include layout="@layout/content_nav"/>
+    </LinearLayout>
+
+</LinearLayout>

DeliciousFoodApp——蒋迎晨第四次实验代码/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——蒋迎晨第四次实验代码/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_gravity="center"
+            android:layout_marginTop="600dp"
+            android:backgroundTint="#F16E01"
+            android:onClick="click"
+            android:text="开启美食之旅"
+            android:textColor="@android:color/white"
+            android:textSize="24sp" />
+
+
+    </LinearLayout>
+</androidx.constraintlayout.widget.ConstraintLayout>

DeliciousFoodApp——蒋迎晨第四次实验代码/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="100dp"
+                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="18dp"
+                android:background="@drawable/edittext_border"
+                android:layout_toRightOf="@id/username" />
+
+            <TextView
+                android:id="@+id/password"
+                android:layout_width="100dp"
+                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="18dp"
+                android:layout_marginTop="30dp"
+                android:layout_toRightOf="@id/username"
+                android:background="@drawable/edittext_border"
+                android:textSize="20sp" />
+
+            <TextView
+                android:id="@+id/surepassword"
+                android:layout_width="100dp"
+                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="18dp"
+                android:layout_marginTop="30dp"
+                android:layout_toRightOf="@id/phone"
+                android:background="@drawable/edittext_border"
+                android:textSize="20sp" />
+
+            <TextView
+                android:id="@+id/phone"
+                android:layout_width="100dp"
+                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="18dp"
+                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="100dp"
+                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="18dp"
+                android:layout_marginTop="30dp"
+                android:layout_toRightOf="@id/email"
+                android:background="@drawable/edittext_border"
+                android:textSize="20sp" />
+
+            <TextView
+                android:id="@+id/address"
+                android:layout_width="100dp"
+                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="18dp"
+                android:layout_marginTop="30dp"
+                android:layout_toRightOf="@id/address"
+                android:background="@drawable/edittext_border"
+                android:textSize="20sp" />
+
+            <TextView
+                android:id="@+id/gender"
+                android:layout_width="100dp"
+                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="35dp"
+                android:layout_marginTop="26dp"
+                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="100dp"
+                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="18dp"
+                android:layout_marginTop="15dp"
+                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="2dp"
+                android:layout_marginTop="15dp"
+                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="2dp"
+                android:layout_marginTop="15dp"
+                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——蒋迎晨第四次实验代码/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——蒋迎晨第四次实验代码/app/src/main/res/layout/content_nav.xml

@@ -0,0 +1,113 @@
+<?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——蒋迎晨第四次实验代码/app/src/main/res/layout/fragment_food.xml

@@ -0,0 +1,46 @@
+<?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"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:orientation="vertical"
+    tools:context=".foodFragment">
+
+    <androidx.appcompat.widget.Toolbar
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="@color/orange2"
+        app:title="美食分类"
+        app:titleTextColor="@color/white"/>
+        <androidx.appcompat.widget.LinearLayoutCompat
+            android:layout_width="match_parent"
+            android:layout_height="match_parent">
+
+            <androidx.appcompat.widget.LinearLayoutCompat
+                android:layout_width="100dp"
+                android:layout_height="match_parent">
+
+                <androidx.recyclerview.widget.RecyclerView
+                    android:id="@+id/leftlist"
+                    android:layout_width="match_parent"
+                    android:layout_height="match_parent"
+                    android:background="#F1EE8D"
+                    app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
+                    tools:listitem="@layout/left_list_item" />
+            </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/rightlist"
+                    tools:listitem="@layout/right_list_item"
+                    app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
+                    android:layout_width="match_parent"
+                    android:layout_height="match_parent"/>
+            </androidx.appcompat.widget.LinearLayoutCompat>
+
+        </androidx.appcompat.widget.LinearLayoutCompat>
+
+</androidx.appcompat.widget.LinearLayoutCompat>

DeliciousFoodApp——蒋迎晨第四次实验代码/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/listview"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:background="#F1EE8D"
+                    android:padding="8dp"/>
+
+            </RelativeLayout>
+
+        </FrameLayout>
+    </FrameLayout>
+
+
+</LinearLayout>

DeliciousFoodApp——蒋迎晨第四次实验代码/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——蒋迎晨第四次实验代码/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——蒋迎晨第四次实验代码/app/src/main/res/layout/left_list_item.xml

@@ -0,0 +1,14 @@
+<?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:layout_width="100dp"
+        android:layout_height="50dp"
+        android:text="xxx"
+        android:textSize="20sp"
+        android:gravity="center"/>
+
+</androidx.appcompat.widget.LinearLayoutCompat>

DeliciousFoodApp——蒋迎晨第四次实验代码/app/src/main/res/layout/list_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——蒋迎晨第四次实验代码/app/src/main/res/layout/right_list_item.xml

@@ -0,0 +1,60 @@
+<?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">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_margin="10dp">
+        <ImageView
+            android:id="@+id/product_img"
+            android:layout_width="100dp"
+            android:layout_height="100dp"
+            android:scaleType="centerCrop"
+            android:src="@drawable/one"/>
+
+        <LinearLayout
+            android:layout_marginLeft="10dp"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:orientation="vertical">
+            <TextView
+                android:id="@+id/product_title"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:singleLine="true"
+                android:textColor="#333"
+                android:textSize="18sp"
+                android:text="食品食品食品食品食品食品食品食品食品食品食品食品"/>
+
+            <TextView
+                android:id="@+id/product_price"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="3dp"
+                android:text="月售1000+  人均  ¥84"
+                android:textColor="#F10404"
+                android:textSize="15sp" />
+
+            <TextView
+                android:id="@+id/product_shop"
+                android:layout_marginTop="3dp"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:textSize="15sp"
+                android:text="店铺：xx店"/>
+
+            <TextView
+                android:id="@+id/product_produce"
+                android:layout_marginTop="3dp"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:singleLine="true"
+                android:textSize="15sp"
+                android:text="食品介绍：xxxxxxxxxx"/>
+
+        </LinearLayout>
+    </LinearLayout>
+
+</androidx.appcompat.widget.LinearLayoutCompat>