提交报告

src/Elderlycaresystem2/.gitignore

@@ -0,0 +1,15 @@
+*.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

src/Elderlycaresystem2/.idea/.gitignore

@@ -0,0 +1,3 @@
+# 默认忽略的文件
+/shelf/
+/workspace.xml

src/Elderlycaresystem2/.idea/.name

@@ -0,0 +1 @@
+Elderlycaresystem2

src/Elderlycaresystem2/.idea/compiler.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <bytecodeTargetLevel target="11" />
+  </component>
+</project>

src/Elderlycaresystem2/.idea/gradle.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
+  <component name="GradleSettings">
+    <option name="linkedExternalProjectsSettings">
+      <GradleProjectSettings>
+        <option name="testRunner" value="GRADLE" />
+        <option name="distributionType" value="DEFAULT_WRAPPED" />
+        <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="gradleHome" value="D:/gradle-8.6" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+            <option value="$PROJECT_DIR$/app" />
+          </set>
+        </option>
+      </GradleProjectSettings>
+    </option>
+  </component>
+</project>

src/Elderlycaresystem2/.idea/misc.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_11" default="true" project-jdk-name="Android Studio default JDK" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/build/classes" />
+  </component>
+  <component name="ProjectType">
+    <option name="id" value="Android" />
+  </component>
+</project>

src/Elderlycaresystem2/app/.gitignore

@@ -0,0 +1 @@
+/build

src/Elderlycaresystem2/app/build.gradle

@@ -0,0 +1,66 @@
+plugins {
+    id 'com.android.application'
+}
+
+android {
+    namespace 'com.example.elderlycaresystem2'
+    compileSdk 33
+
+    defaultConfig {
+        applicationId "com.example.elderlycaresystem2"
+        minSdk 24
+        targetSdk 33
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled 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 'androidx.appcompat:appcompat:1.4.1'
+    implementation 'com.google.android.material:material:1.5.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.1.3'
+    implementation 'androidx.navigation:navigation-fragment:2.4.1'
+    implementation 'androidx.navigation:navigation-ui:2.4.1'
+    testImplementation 'junit:junit:4.13.2'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
+    implementation 'com.fasterxml.jackson.core:jackson-databind:2.15.3'
+    implementation 'com.fasterxml.jackson.core:jackson-core:2.15.3'
+    implementation 'com.fasterxml.jackson.core:jackson-annotations:2.15.3'
+    // RecyclerView 用于显示消息列表
+    implementation 'androidx.recyclerview:recyclerview:1.2.1'
+
+    // Retrofit 用于网络请求
+    implementation 'com.squareup.retrofit2:retrofit:2.9.0'
+    implementation 'com.squareup.retrofit2:converter-jackson:2.9.0'
+    implementation 'com.fasterxml.jackson.core:jackson-databind:2.15.2' // 使用最新版本
+
+    // OkHttp 日志拦截器（可选，用于调试）
+    implementation 'com.squareup.okhttp3:logging-interceptor:4.9.1'
+
+    // Glide 或 Picasso 用于加载图片（如果需要）
+    implementation 'com.github.bumptech.glide:glide:4.12.0'
+//    kapt 'com.github.bumptech.glide:compiler:4.12.0'y
+    implementation 'com.google.code.gson:gson:2.8.9'
+
+    // 其他常用库
+    implementation 'androidx.lifecycle:lifecycle-extensions:2.2.0'
+
+}

src/Elderlycaresystem2/app/proguard-rules.pro

@@ -0,0 +1,21 @@
+# 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

src/Elderlycaresystem2/app/src/androidTest/java/com/example/elderlycaresystem2/ExampleInstrumentedTest.java

@@ -0,0 +1,26 @@
+package com.example.elderlycaresystem2;
+
+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.elderlycaresystem2", appContext.getPackageName());
+    }
+}

src/Elderlycaresystem2/app/src/main/AndroidManifest.xml

@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.CALL_PHONE" />
+    <uses-permission android:name="android.permission.VIBRATE" />
+
+    <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:supportsRtl="true"
+        android:theme="@style/Theme.Elderlycaresystem2.NoActionBar"
+        tools:targetApi="31">
+        <activity
+            android:name=".DetectionActivity"
+            android:exported="true"
+            android:label="@string/app_name"
+            android:theme="@style/Theme.Elderlycaresystem2.NoActionBar">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+        <service
+            android:name=".FallManager"
+            android:enabled="true"
+            android:exported="false"/>
+        <activity android:name=".UserActivity" />
+        <!--        <activity android:name=".DetectionActivity" />-->
+        <activity android:name=".TalkActivity" />
+        <activity android:name=".ChangeActivity" />
+        <activity android:name=".ContactActivity" />
+    </application>
+
+
+</manifest>

src/Elderlycaresystem2/app/src/main/java/com/example/elderlycaresystem2/AIRequest.java

@@ -0,0 +1,40 @@
+package com.example.elderlycaresystem2; // 请替换为您的实际包名
+
+import java.util.List;
+
+public class AIRequest {
+    private String model;
+    private double temperature;
+    private List<Message> messages;
+
+    public AIRequest(String model, double temperature, List<Message> messages) {
+        this.model = model;
+        this.temperature = temperature;
+        this.messages = messages;
+    }
+
+    // Getters 和 Setters
+    public String getModel() {
+        return model;
+    }
+
+    public void setModel(String model) {
+        this.model = model;
+    }
+
+    public double getTemperature() {
+        return temperature;
+    }
+
+    public void setTemperature(double temperature) {
+        this.temperature = temperature;
+    }
+
+    public List<Message> getMessages() {
+        return messages;
+    }
+
+    public void setMessages(List<Message> messages) {
+        this.messages = messages;
+    }
+}

src/Elderlycaresystem2/app/src/main/java/com/example/elderlycaresystem2/AIResponse.java

@@ -0,0 +1,130 @@
+package com.example.elderlycaresystem2;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import java.util.List;
+
+@JsonIgnoreProperties(ignoreUnknown = true)
+public class AIResponse {
+    private String id;
+    private String object;
+    private long created;
+    private String model;
+    private List<Choice> choices;
+    private Usage usage;
+
+    // Getter 和 Setter 方法
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    public String getObject() {
+        return object;
+    }
+
+    public void setObject(String object) {
+        this.object = object;
+    }
+
+    public long getCreated() {
+        return created;
+    }
+
+    public void setCreated(long created) {
+        this.created = created;
+    }
+
+    public String getModel() {
+        return model;
+    }
+
+    public void setModel(String model) {
+        this.model = model;
+    }
+
+    public List<Choice> getChoices() {
+        return choices;
+    }
+
+    public void setChoices(List<Choice> choices) {
+        this.choices = choices;
+    }
+
+    public Usage getUsage() {
+        return usage;
+    }
+
+    public void setUsage(Usage usage) {
+        this.usage = usage;
+    }
+
+    @JsonIgnoreProperties(ignoreUnknown = true)
+    public static class Choice {
+        private int index;
+        private Message message;
+        private String finish_reason;
+
+        // Getter 和 Setter 方法
+
+        public int getIndex() {
+            return index;
+        }
+
+        public void setIndex(int index) {
+            this.index = index;
+        }
+
+        public Message getMessage() {
+            return message;
+        }
+
+        public void setMessage(Message message) {
+            this.message = message;
+        }
+
+        public String getFinish_reason() {
+            return finish_reason;
+        }
+
+        public void setFinish_reason(String finish_reason) {
+            this.finish_reason = finish_reason;
+        }
+    }
+
+    @JsonIgnoreProperties(ignoreUnknown = true)
+    public static class Usage {
+        private int prompt_tokens;
+        private int completion_tokens;
+        private int total_tokens;
+
+        // Getter 和 Setter 方法
+
+        public int getPrompt_tokens() {
+            return prompt_tokens;
+        }
+
+        public void setPrompt_tokens(int prompt_tokens) {
+            this.prompt_tokens = prompt_tokens;
+        }
+
+        public int getCompletion_tokens() {
+            return completion_tokens;
+        }
+
+        public void setCompletion_tokens(int completion_tokens) {
+            this.completion_tokens = completion_tokens;
+        }
+
+        public int getTotal_tokens() {
+            return total_tokens;
+        }
+
+        public void setTotal_tokens(int total_tokens) {
+            this.total_tokens = total_tokens;
+        }
+    }
+}

src/Elderlycaresystem2/app/src/main/java/com/example/elderlycaresystem2/ApiService.java

@@ -0,0 +1,10 @@
+package com.example.elderlycaresystem2; // 请替换为您的实际包名
+
+import retrofit2.Call;
+import retrofit2.http.Body;
+import retrofit2.http.POST;
+
+public interface ApiService {
+    @POST("v1/chat/completions") // 定义相对路径
+    Call<AIResponse> getAIReply(@Body AIRequest request);
+}

src/Elderlycaresystem2/app/src/main/java/com/example/elderlycaresystem2/ChangeActivity.java

@@ -0,0 +1,82 @@
+// src/main/java/com/example/elderlycaresystem2/ChangeActivity.java
+package com.example.elderlycaresystem2;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.text.TextUtils;
+import android.view.View;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.Toast;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+public class ChangeActivity extends AppCompatActivity implements View.OnClickListener {
+
+    private EditText etAcc;
+    private Button btnConfirm;
+    private ContactManager contactManager;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_change); // 确保布局文件名为 activity_contact.xml
+
+        // 初始化 ContactManager
+        contactManager = new ContactManager(this);
+
+        // 绑定视图
+        View back=findViewById(R.id.btn_back);
+        etAcc = findViewById(R.id.et_acc);
+        btnConfirm = findViewById(R.id.btn_queding);
+        back.setOnClickListener(this);
+
+        // 加载当前联系人信息
+        loadContactInfo();
+
+        // 设置确认按钮点击事件
+        btnConfirm.setOnClickListener(view -> {
+            String acc = etAcc.getText().toString().trim();
+
+            if (validateInput(acc)) {
+                // 保存联系人信息
+                contactManager.setAcc(acc);
+
+                Toast.makeText(ChangeActivity.this, "阈值已更新", Toast.LENGTH_SHORT).show();
+
+                // 结束当前活动，返回上一页
+                finish();
+            }
+        });
+    }
+    @Override
+    public void onClick(View v) {
+        if (v.getId() == R.id.btn_back) {
+            Intent intent = new Intent(ChangeActivity.this, UserActivity.class);
+            startActivity(intent);
+            finish();
+        }
+        else {
+            return;
+        }
+
+    }
+
+    // 加载当前联系人信息到输入框
+    private void loadContactInfo() {
+        String currentAcc = contactManager.getAcc();
+        etAcc.setText(currentAcc);
+
+    }
+
+    // 验证用户输入
+    private boolean validateInput(String acc) {
+
+        if (TextUtils.isEmpty(acc)) {
+            Toast.makeText(this, "摔倒阈值不能为空", Toast.LENGTH_SHORT).show();
+            return false;
+        }
+
+        return true;
+    }
+}

src/Elderlycaresystem2/app/src/main/java/com/example/elderlycaresystem2/ContactActivity.java

@@ -0,0 +1,96 @@
+// src/main/java/com/example/elderlycaresystem2/ContactActivity.java
+package com.example.elderlycaresystem2;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.text.TextUtils;
+import android.view.View;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.Toast;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+public class ContactActivity extends AppCompatActivity implements View.OnClickListener {
+
+    private EditText etName, etPhone;
+    private Button btnConfirm;
+    private ContactManager contactManager;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_contact); // 确保布局文件名为 activity_contact.xml
+
+        // 初始化 ContactManager
+        contactManager = new ContactManager(this);
+
+        // 绑定视图
+        View back=findViewById(R.id.btn_back);
+        etName = findViewById(R.id.et_name);
+        etPhone = findViewById(R.id.et_phone);
+        btnConfirm = findViewById(R.id.btn_queding);
+        back.setOnClickListener(this);
+
+        // 加载当前联系人信息
+        loadContactInfo();
+
+        // 设置确认按钮点击事件
+        btnConfirm.setOnClickListener(view -> {
+            String name = etName.getText().toString().trim();
+            String phone = etPhone.getText().toString().trim();
+
+            if (validateInput(name, phone)) {
+                // 保存联系人信息
+                contactManager.setContactName(name);
+                contactManager.setContactPhone(phone);
+
+                Toast.makeText(ContactActivity.this, "紧急联系人已更新", Toast.LENGTH_SHORT).show();
+
+                // 结束当前活动，返回上一页
+                finish();
+            }
+        });
+    }
+    @Override
+    public void onClick(View v) {
+        if (v.getId() == R.id.btn_back) {
+            Intent intent = new Intent(ContactActivity.this, UserActivity.class);
+            startActivity(intent);
+            finish();
+        }
+        else {
+            return;
+        }
+
+    }
+
+    // 加载当前联系人信息到输入框
+    private void loadContactInfo() {
+        String currentName = contactManager.getContactName();
+        String currentPhone = contactManager.getContactPhone();
+
+        etName.setText(currentName);
+        etPhone.setText(currentPhone);
+    }
+
+    // 验证用户输入
+    private boolean validateInput(String name, String phone) {
+        if (TextUtils.isEmpty(name)) {
+            Toast.makeText(this, "联系人名字不能为空", Toast.LENGTH_SHORT).show();
+            return false;
+        }
+
+        if (TextUtils.isEmpty(phone)) {
+            Toast.makeText(this, "电话号码不能为空", Toast.LENGTH_SHORT).show();
+            return false;
+        }
+
+        if (!phone.matches("\\d{11}")) { // 简单验证11位数字
+            Toast.makeText(this, "请输入有效的11位电话号码", Toast.LENGTH_SHORT).show();
+            return false;
+        }
+
+        return true;
+    }
+}

src/Elderlycaresystem2/app/src/main/java/com/example/elderlycaresystem2/ContactData.java

@@ -0,0 +1,4 @@
+package com.example.elderlycaresystem2;
+
+public class ContactData {
+}

src/Elderlycaresystem2/app/src/main/java/com/example/elderlycaresystem2/ContactManager.java

@@ -0,0 +1,42 @@
+// src/main/java/com/example/elderlycaresystem2/ContactManager.java
+package com.example.elderlycaresystem2;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.preference.PreferenceManager;
+
+public class ContactManager {
+    private static final String KEY_CONTACT_NAME = "contact_name";
+    private static final String KEY_CONTACT_PHONE = "contact_phone";
+    private static final String KEY_ACC = "acc";
+    private SharedPreferences sharedPreferences;
+
+    public ContactManager(Context context) {
+        sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
+    }
+
+    // 获取联系人名字
+    public String getContactName() {
+        return sharedPreferences.getString(KEY_CONTACT_NAME, "紧急联系人");
+    }
+
+    // 获取联系人电话
+    public String getContactPhone() {
+        return sharedPreferences.getString(KEY_CONTACT_PHONE, "110");
+    }
+    public String getAcc() {
+        return sharedPreferences.getString(KEY_ACC, "20");
+    }
+    // 设置联系人名字
+    public void setContactName(String name) {
+        sharedPreferences.edit().putString(KEY_CONTACT_NAME, name).apply();
+    }
+
+    // 设置联系人电话
+    public void setContactPhone(String phone) {
+        sharedPreferences.edit().putString(KEY_CONTACT_PHONE, phone).apply();
+    }
+    public void setAcc(String acc) {
+        sharedPreferences.edit().putString(KEY_ACC, acc).apply();
+    }
+}

src/Elderlycaresystem2/app/src/main/java/com/example/elderlycaresystem2/DetectionActivity.java

@@ -0,0 +1,365 @@
+// src/main/java/com/example/elderlycaresystem2/MainActivity.java
+package com.example.elderlycaresystem2;
+
+import android.Manifest;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.content.pm.PackageManager;
+import android.hardware.Sensor;
+import android.hardware.SensorEvent;
+import android.hardware.SensorEventListener;
+import android.hardware.SensorManager;
+import android.net.Uri;
+import android.os.Bundle;
+import android.os.Handler;
+import android.os.Looper;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import androidx.annotation.NonNull;
+import androidx.appcompat.app.AlertDialog;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.core.app.ActivityCompat;
+import androidx.core.content.ContextCompat;
+
+public class DetectionActivity extends AppCompatActivity implements SensorEventListener,View.OnClickListener {
+    private LinearLayout btn_talk;
+    private LinearLayout btn_main;
+    private LinearLayout btn_user;
+
+    private static final String TAG = "MainActivity";
+    private static final int REQUEST_CALL_PERMISSION = 100;
+
+    private SensorManager sensorManager;
+    private Sensor accelerometer;
+    private Sensor gyroscope;
+    private TextView statusTextView;
+    private Button buttonToggleDetection;
+
+    // 阈值参数
+    private final double FALL_THRESHOLD_LOW = 20.0;  // 加速度低阈值
+    private final double FALL_THRESHOLD_HIGH = 30.0; // 加速度高阈值
+    private final double ROTATION_THRESHOLD = 20.0; // 陀螺仪旋转变化阈值
+
+    private boolean isFalling = false;  // 跌倒标志位
+    private boolean hasFallen = false;  // 防止多次触发
+    private boolean isDetectionEnabled = true; // 跌倒检测是否开启
+
+    // 倒计时相关
+    private Handler handler = new Handler(Looper.getMainLooper());
+    private Runnable autoCallRunnable;
+    private int countdownSeconds = 10; // 倒计时秒数
+
+    // 紧急联系人管理
+    private ContactManager contactManager;
+
+    // 用于标记权限请求是否是由跌倒检测触发
+    private boolean isPermissionRequestedForFall = false;
+
+    // SharedPreferences 键
+    private static final String PREF_DETECTION_ENABLED = "pref_detection_enabled";
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_detection); // 确保布局文件名为 activity_main.xml
+
+        // 初始化 ContactManager
+        contactManager = new ContactManager(this);
+
+        // 初始化TextView用于显示状态
+        statusTextView = findViewById(R.id.statusTextView); // 确保 ID 一致
+
+        // 初始化按钮
+        buttonToggleDetection = findViewById(R.id.switch_toggle_detection);
+
+        // 初始化传感器管理器
+        sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
+
+        btn_talk  = findViewById(R.id.btn_talk);
+        btn_main  = findViewById(R.id.btn_main);
+        btn_user  = findViewById(R.id.btn_user);
+        // 给开关按钮设置选择监听器，一旦用户点击它，就触发监听器的onCheckedChanged方法
+        //底部导航栏
+        btn_talk.setOnClickListener(this);
+        btn_main.setOnClickListener(this);
+        btn_user.setOnClickListener(this);
+        // 获取加速度计和陀螺仪传感器
+        if (sensorManager != null) {
+            accelerometer = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
+            gyroscope = sensorManager.getDefaultSensor(Sensor.TYPE_GYROSCOPE);
+        }
+
+        // 读取检测状态
+        SharedPreferences sharedPreferences = getSharedPreferences("app_prefs", MODE_PRIVATE);
+        isDetectionEnabled = sharedPreferences.getBoolean(PREF_DETECTION_ENABLED, true);
+        updateDetectionUI();
+
+        // 设置按钮点击事件
+        buttonToggleDetection.setOnClickListener(view -> {
+            isDetectionEnabled = !isDetectionEnabled;
+            // 保存检测状态
+            sharedPreferences.edit().putBoolean(PREF_DETECTION_ENABLED, isDetectionEnabled).apply();
+            // 更新UI和传感器监听器
+            updateDetectionUI();
+        });
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        // 根据检测状态注册传感器监听器
+        if (isDetectionEnabled) {
+            registerSensorListeners();
+        }
+    }
+
+    @Override
+    protected void onPause() {
+        super.onPause();
+        // 取消注册监听器
+        sensorManager.unregisterListener(this);
+    }
+
+    @Override
+    public void onSensorChanged(SensorEvent event) {
+        if (!isDetectionEnabled || hasFallen) {
+            // 检测未开启或已检测到跌倒，避免处理
+            return;
+        }
+
+        if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
+            handleAccelerometerData(event.values);
+        } else if (event.sensor.getType() == Sensor.TYPE_GYROSCOPE) {
+            handleGyroscopeData(event.values);
+        }
+    }
+
+    private void handleAccelerometerData(float[] values) {
+        // 获取加速度数据
+        float x = values[0];
+        float y = values[1];
+        float z = values[2];
+
+        // 计算加速度的模
+        double totalAcceleration = Math.sqrt(x * x + y * y + z * z);
+        Log.d(TAG, "加速度模: " + totalAcceleration);
+        SharedPreferences shared=getSharedPreferences("加速度",MODE_PRIVATE);
+        shared.edit().putFloat("加速度", (float) totalAcceleration).apply();
+        // 判断是否进入自由落体阶段
+        if (totalAcceleration > FALL_THRESHOLD_LOW) {
+            isFalling = true; // 标记为正在摔倒
+            runOnUiThread(() -> statusTextView.setText("正在摔倒... 自由落体检测到"));
+        }
+        if (isFalling && (totalAcceleration > FALL_THRESHOLD_HIGH)) {
+            // 如果之前进入自由落体阶段，且现在检测到冲击，认为是摔倒
+            isFalling = false; // 重置摔倒标志位
+            hasFallen = true; // 防止重复触发
+            runOnUiThread(() -> {
+                statusTextView.setText("摔倒检测到！正在处理...");
+                showFallDialog();
+            });
+        }
+    }
+
+    private void handleGyroscopeData(float[] values) {
+        // 获取陀螺仪数据
+        float rotationX = values[0];
+        float rotationY = values[1];
+        float rotationZ = values[2];
+        Log.d(TAG, "陀螺仪旋转: X=" + rotationX + ", Y=" + rotationY + ", Z=" + rotationZ);
+
+        // 判断旋转变化是否过大
+        if (Math.abs(rotationX) > ROTATION_THRESHOLD || Math.abs(rotationY) > ROTATION_THRESHOLD || Math.abs(rotationZ) > ROTATION_THRESHOLD) {
+            runOnUiThread(() -> statusTextView.setText("陀螺仪检测到异常旋转！"));
+            showFallDialog();
+        }
+    }
+
+    private void showFallDialog() {
+        AlertDialog.Builder builder = new AlertDialog.Builder(this);
+        builder.setTitle("跌倒警报");
+        builder.setMessage("检测到跌倒，是否拨打紧急联系人电话？");
+
+        builder.setPositiveButton("是", new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialog, int which) {
+
+                // 取消自动拨打
+                handler.removeCallbacks(autoCallRunnable);
+
+                // 拨打电话
+                makeEmergencyCall();
+            }
+        });
+
+        builder.setNegativeButton("否", new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialog, int which) {
+                // 取消自动拨打
+                handler.removeCallbacks(autoCallRunnable);
+                dialog.dismiss();
+                hasFallen = false; // 允许再次触发
+                runOnUiThread(() -> statusTextView.setText("摔倒检测取消"));
+            }
+        });
+
+        builder.setCancelable(false); // 不允许点击外部取消
+
+        AlertDialog alertDialog = builder.create();
+        alertDialog.show();
+
+        // 启动倒计时任务，倒计时结束后自动拨打电话
+        startAutoCallCountdown();
+    }
+
+    private void startAutoCallCountdown() {
+        autoCallRunnable = new Runnable() {
+            int remainingSeconds = countdownSeconds;
+
+            @Override
+            public void run() {
+                if (remainingSeconds > 0) {
+                    runOnUiThread(() -> statusTextView.setText("倒计时 " + remainingSeconds + " 秒后自动拨打紧急电话"));
+                    remainingSeconds--;
+                    handler.postDelayed(this, 1000);
+                } else {
+                    makeEmergencyCall();
+                }
+            }
+        };
+        handler.post(autoCallRunnable);
+    }
+
+    private void makeEmergencyCall() {
+        String emergencyNumber = contactManager.getContactPhone(); // 使用 ContactManager 获取号码
+
+        if (emergencyNumber == null || emergencyNumber.isEmpty()) {
+            Toast.makeText(this, "紧急联系人号码未设置", Toast.LENGTH_SHORT).show();
+            return;
+        }
+
+        // 检查拨打电话权限
+        if (ContextCompat.checkSelfPermission(this, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
+            Toast.makeText(this, "未授予拨打电话权限", Toast.LENGTH_SHORT).show();
+            // 仅在跌倒检测触发时请求权限
+            isPermissionRequestedForFall = true;
+            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CALL_PHONE}, REQUEST_CALL_PERMISSION);
+            return;
+        }
+
+        // 拨打电话
+        Intent callIntent = new Intent(Intent.ACTION_CALL);
+        callIntent.setData(Uri.parse("tel:" + emergencyNumber));
+        callIntent.putExtra("com.android.phone.extra.slot", 0); // simSlotIndex为0或1
+        try {
+            startActivity(callIntent);
+        } catch (SecurityException e) {
+            Log.e(TAG, "拨打电话失败: " + e.getMessage());
+            Toast.makeText(this, "拨打电话失败，请检查权限设置", Toast.LENGTH_SHORT).show();
+        }
+    }
+
+    // 处理权限请求结果
+    @Override
+    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+        if (requestCode == REQUEST_CALL_PERMISSION) {
+            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
+                if (isPermissionRequestedForFall) {
+                    isPermissionRequestedForFall = false;
+                    // 权限授予后，尝试拨打电话
+                    makeEmergencyCall();
+                }
+            } else {
+                Toast.makeText(this, "未授予拨打电话权限，无法自动拨打紧急电话", Toast.LENGTH_SHORT).show();
+            }
+        } else {
+            super.onRequestPermissionsResult(requestCode, permissions, grantResults);
+        }
+    }
+
+    // 可根据需要处理传感器精度变化
+    @Override
+    public void onAccuracyChanged(Sensor sensor, int accuracy) {
+        // 不需要处理
+    }
+
+    // 菜单相关代码
+    @Override
+    public boolean onCreateOptionsMenu(android.view.Menu menu) {
+        // Inflate the menu; 这将把 menu_main.xml 添加到 ActionBar
+        getMenuInflater().inflate(R.menu.menu_main, menu);
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(@NonNull android.view.MenuItem item) {
+        // 处理 ActionBar 的项目点击事件
+        int id = item.getItemId();
+
+        if (id == R.id.action_settings) {
+            // 启动 ContactActivity
+            Intent intent = new Intent(this, ContactActivity.class);
+            startActivity(intent);
+            return true;
+        }
+
+        return super.onOptionsItemSelected(item);
+    }
+
+    /**
+     * 注册传感器监听器
+     */
+    private void registerSensorListeners() {
+        if (accelerometer != null) {
+            sensorManager.registerListener(this, accelerometer, SensorManager.SENSOR_DELAY_NORMAL);
+        }
+        if (gyroscope != null) {
+            sensorManager.registerListener(this, gyroscope, SensorManager.SENSOR_DELAY_NORMAL);
+        }
+        Toast.makeText(this, "跌倒检测已开启", Toast.LENGTH_SHORT).show();
+        buttonToggleDetection.setText("关闭跌倒检测");
+        statusTextView.setText("跌倒检测已开启");
+    }
+
+    /**
+     * 注销传感器监听器
+     */
+    private void unregisterSensorListeners() {
+        sensorManager.unregisterListener(this);
+        Toast.makeText(this, "跌倒检测已关闭", Toast.LENGTH_SHORT).show();
+        buttonToggleDetection.setText("开启跌倒检测");
+        statusTextView.setText("跌倒检测已关闭");
+    }
+
+    /**
+     * 更新检测按钮的UI和传感器监听器
+     */
+    private void updateDetectionUI() {
+        if (isDetectionEnabled) {
+            registerSensorListeners();
+        } else {
+            unregisterSensorListeners();
+        }
+    }
+    @Override
+    public void onClick(View v) {
+        if (v.getId() == R.id.btn_talk) {
+            Intent intent = new Intent(DetectionActivity.this, TalkActivity.class);
+            startActivity(intent);
+            finish();
+        } else if (v.getId() == R.id.btn_main) {
+            return;
+        }else {
+            Intent intent = new Intent(DetectionActivity.this,UserActivity.class);
+            startActivity(intent);
+            finish();
+        }
+
+    }
+}

src/Elderlycaresystem2/app/src/main/java/com/example/elderlycaresystem2/DialogueData.java

@@ -0,0 +1,4 @@
+package com.example.elderlycaresystem2;
+
+public class DialogueData {
+}

src/Elderlycaresystem2/app/src/main/java/com/example/elderlycaresystem2/FallManager.java

@@ -0,0 +1,166 @@
+package com.example.elderlycaresystem2;
+
+import android.annotation.SuppressLint;
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.media.MediaPlayer;
+import android.net.Uri;
+import android.os.Handler;
+import android.os.Message;
+import android.os.Vibrator;
+import android.preference.PreferenceManager;
+import android.telephony.SmsManager;
+import android.util.Log;
+import android.view.WindowManager;
+import android.widget.TextView;
+import android.widget.Toast;
+import android.content.pm.PackageManager;
+import androidx.core.app.ActivityCompat;
+import androidx.core.content.ContextCompat;
+
+import java.util.Timer;
+import java.util.TimerTask;
+
+public class FallManager extends BroadcastReceiver {
+
+    private TextView countingView;
+    private Dialog dialog;
+    private Timer timer;
+    private SharedPreferences sharedPreferences;
+    private Vibrator vibrator;
+    private boolean isVibrate;
+    private MediaPlayer mediaPlayer;
+    private Context context;
+    private final String TAG = "FallLocalReceiver";
+
+    public FallManager() {
+    }
+
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        Log.d(TAG, "FallLocalReceiver.onReceive()");
+        this.context = context;
+        showAlertDialog();
+
+        sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
+        isVibrate = sharedPreferences.getBoolean("pre_key_vibrate", true);
+        if (isVibrate) {
+            startVibrate();
+        }
+        startAlarm();
+    }
+
+    private void showAlertDialog() {
+        countingView = new TextView(context);
+        AlertDialog.Builder builder = new AlertDialog.Builder(context.getApplicationContext());
+        builder.setTitle("跌倒警报");
+        builder.setView(countingView);
+        builder.setMessage("检测到跌倒发生，是否发出警报？");
+//        builder.setIcon(R.drawable.ic_warning); 《图标资源》
+        builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialog, int which) {
+                timer.cancel();
+                dialog.dismiss();
+                if (isVibrate) {
+                    stopVibrate();
+                }
+                stopAlarm();
+            }
+        });
+        dialog = builder.create();
+        dialog.setCanceledOnTouchOutside(false);
+        dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
+        countDown();
+        dialog.show();
+        Log.d(TAG, "dialog.create()");
+    }
+
+    private void countDown() {
+        timer = new Timer();
+        TimerTask timerTask = new TimerTask() {
+            int countTime = 10;
+
+            @Override
+            public void run() {
+                if (countTime > 0) {
+                    countTime--;
+                }
+                Message msgTime = handler.obtainMessage();
+                msgTime.arg1 = countTime;
+                handler.sendMessage(msgTime);
+            }
+        };
+        timer.schedule(timerTask, 50, 1000);
+    }
+
+    public Handler handler = new Handler() {
+        @SuppressLint("HandlerLeak")
+        @Override
+        public void handleMessage(Message msg) {
+            super.handleMessage(msg);
+            if (msg.arg1 > 0) {
+                countingView.setText(msg.arg1 + "秒后自动拨打紧急联系人电话");
+            } else {
+                if (dialog != null) {
+                    dialog.dismiss();
+                    if (isVibrate) {
+                        stopVibrate();
+                    }
+                    stopAlarm();
+                    checkCallPermission(); // 倒计时结束自动拨打电话
+                }
+                timer.cancel();
+            }
+        }
+    };
+
+    private void startVibrate() {
+        vibrator = (Vibrator) context.getSystemService(Context.VIBRATOR_SERVICE);
+        long[] pattern = {100, 500, 100, 500};
+        vibrator.vibrate(pattern, 2);
+    }
+
+    private void stopVibrate() {
+        vibrator.cancel();
+    }
+
+    private void startAlarm() {
+        String ringtone = sharedPreferences.getString("pre_key_alarm", null);
+        Uri ringtoneUri = Uri.parse(ringtone);
+        mediaPlayer = MediaPlayer.create(context, ringtoneUri);
+        mediaPlayer.setLooping(true); // 设置循环
+        mediaPlayer.start();
+    }
+
+    private void stopAlarm() {
+        if (mediaPlayer != null) {
+            mediaPlayer.stop();
+            mediaPlayer.release();
+        }
+        mediaPlayer.stop();
+        mediaPlayer.release();
+    }
+
+    private void checkCallPermission() {
+        String phoneNum = sharedPreferences.getString("pre_key_phone", null);
+        if (phoneNum != null && !phoneNum.isEmpty()) {
+            Intent callIntent = new Intent(Intent.ACTION_CALL);
+            callIntent.setData(Uri.parse("tel:" + phoneNum));
+
+            // 检查权限
+            if (ContextCompat.checkSelfPermission(context, android.Manifest.permission.CALL_PHONE) == PackageManager.PERMISSION_GRANTED) {
+                context.startActivity(callIntent);
+            } else {
+                Toast.makeText(context, "请授予拨打电话权限", Toast.LENGTH_SHORT).show();
+            }
+        } else {
+            Toast.makeText(context, "没有设置紧急联系人号码", Toast.LENGTH_SHORT).show();
+        }
+    }
+}

src/Elderlycaresystem2/app/src/main/java/com/example/elderlycaresystem2/FirstFragment.java

@@ -0,0 +1,47 @@
+package com.example.elderlycaresystem2;
+
+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.navigation.fragment.NavHostFragment;
+
+import com.example.elderlycaresystem2.databinding.FragmentFirstBinding;
+
+public class FirstFragment extends Fragment {
+
+    private FragmentFirstBinding binding;
+
+    @Override
+    public View onCreateView(
+            LayoutInflater inflater, ViewGroup container,
+            Bundle savedInstanceState
+    ) {
+
+        binding = FragmentFirstBinding.inflate(inflater, container, false);
+        return binding.getRoot();
+
+    }
+
+    public void onViewCreated(@NonNull View view, Bundle savedInstanceState) {
+        super.onViewCreated(view, savedInstanceState);
+
+        binding.buttonFirst.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                NavHostFragment.findNavController(FirstFragment.this)
+                        .navigate(R.id.action_FirstFragment_to_SecondFragment);
+            }
+        });
+    }
+
+    @Override
+    public void onDestroyView() {
+        super.onDestroyView();
+        binding = null;
+    }
+
+}

src/Elderlycaresystem2/app/src/main/java/com/example/elderlycaresystem2/MainActivity.java

@@ -0,0 +1,76 @@
+package com.example.elderlycaresystem2;
+
+import android.os.Bundle;
+
+import com.google.android.material.snackbar.Snackbar;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.view.View;
+
+import androidx.navigation.NavController;
+import androidx.navigation.Navigation;
+import androidx.navigation.ui.AppBarConfiguration;
+import androidx.navigation.ui.NavigationUI;
+
+import com.example.elderlycaresystem2.databinding.ActivityMainBinding;
+
+import android.view.Menu;
+import android.view.MenuItem;
+
+public class MainActivity extends AppCompatActivity {
+
+    private AppBarConfiguration appBarConfiguration;
+    private ActivityMainBinding binding;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        binding = ActivityMainBinding.inflate(getLayoutInflater());
+        setContentView(binding.getRoot());
+
+        setSupportActionBar(binding.toolbar);
+
+        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment_content_main);
+        appBarConfiguration = new AppBarConfiguration.Builder(navController.getGraph()).build();
+        NavigationUI.setupActionBarWithNavController(this, navController, appBarConfiguration);
+
+        binding.fab.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
+                        .setAction("Action", null).show();
+            }
+        });
+    }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        // Inflate the menu; this adds items to the action bar if it is present.
+        getMenuInflater().inflate(R.menu.menu_main, menu);
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        // Handle action bar item clicks here. The action bar will
+        // automatically handle clicks on the Home/Up button, so long
+        // as you specify a parent activity in AndroidManifest.xml.
+        int id = item.getItemId();
+
+        //noinspection SimplifiableIfStatement
+        if (id == R.id.action_settings) {
+            return true;
+        }
+
+        return super.onOptionsItemSelected(item);
+    }
+
+    @Override
+    public boolean onSupportNavigateUp() {
+        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment_content_main);
+        return NavigationUI.navigateUp(navController, appBarConfiguration)
+                || super.onSupportNavigateUp();
+    }
+}

src/Elderlycaresystem2/app/src/main/java/com/example/elderlycaresystem2/Message.java

@@ -0,0 +1,34 @@
+package com.example.elderlycaresystem2;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+
+@JsonIgnoreProperties(ignoreUnknown = true)
+public class Message {
+    private String role;
+    private String content;
+
+    public Message() {
+    }
+
+    public Message(String role, String content) {
+        this.role = role;
+        this.content = content;
+    }
+
+    // Getters 和 Setters
+    public String getRole() {
+        return role;
+    }
+
+    public void setRole(String role) {
+        this.role = role;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    public void setContent(String content) {
+        this.content = content;
+    }
+}

src/Elderlycaresystem2/app/src/main/java/com/example/elderlycaresystem2/MessageManager.java

@@ -0,0 +1,4 @@
+package com.example.elderlycaresystem2;
+
+public class MessageManager {
+}

src/Elderlycaresystem2/app/src/main/java/com/example/elderlycaresystem2/MessagesAdapter.java

@@ -0,0 +1,115 @@
+package com.example.elderlycaresystem2; // 请替换为您的实际包名
+
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.RecyclerView;
+
+import java.util.List;
+
+public class MessagesAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
+
+    private List<Message> messages;
+
+    private static final int VIEW_TYPE_USER = 1;
+    private static final int VIEW_TYPE_ASSISTANT = 2;
+    private static final int VIEW_TYPE_SYSTEM = 3;
+
+    public MessagesAdapter(List<Message> messages) {
+        this.messages = messages;
+    }
+
+    @Override
+    public int getItemViewType(int position) {
+        String role = messages.get(position).getRole();
+        switch (role) {
+            case "user":
+                return VIEW_TYPE_USER;
+            case "assistant":
+                return VIEW_TYPE_ASSISTANT;
+            case "system":
+                return VIEW_TYPE_SYSTEM;
+            default:
+                return VIEW_TYPE_ASSISTANT;
+        }
+    }
+
+    @NonNull
+    @Override
+    public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
+        View view;
+        if(viewType == VIEW_TYPE_USER){
+            view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_message_sent, parent, false);
+            return new UserMessageViewHolder(view);
+        } else if(viewType == VIEW_TYPE_ASSISTANT){
+            view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_message_received, parent, false);
+            return new AssistantMessageViewHolder(view);
+        } else { // VIEW_TYPE_SYSTEM
+            view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_message_system, parent, false);
+            return new SystemMessageViewHolder(view);
+        }
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
+        Message message = messages.get(position);
+        if(holder.getItemViewType() == VIEW_TYPE_USER){
+            ((UserMessageViewHolder) holder).bind(message);
+        } else if(holder.getItemViewType() == VIEW_TYPE_ASSISTANT){
+            ((AssistantMessageViewHolder) holder).bind(message);
+        } else { // VIEW_TYPE_SYSTEM
+            ((SystemMessageViewHolder) holder).bind(message);
+        }
+    }
+
+    @Override
+    public int getItemCount() {
+        return messages.size();
+    }
+
+    // ViewHolder for user messages
+    public class UserMessageViewHolder extends RecyclerView.ViewHolder {
+        TextView textViewMessage;
+
+        public UserMessageViewHolder(@NonNull View itemView) {
+            super(itemView);
+            textViewMessage = itemView.findViewById(R.id.textViewMessage);
+        }
+
+        void bind(Message message){
+            textViewMessage.setText(message.getContent());
+        }
+    }
+
+    // ViewHolder for assistant messages
+    public class AssistantMessageViewHolder extends RecyclerView.ViewHolder {
+        TextView textViewMessage;
+
+        public AssistantMessageViewHolder(@NonNull View itemView) {
+            super(itemView);
+            textViewMessage = itemView.findViewById(R.id.textViewMessage);
+        }
+
+        void bind(Message message){
+            textViewMessage.setText(message.getContent());
+        }
+    }
+
+    // ViewHolder for system messages
+    public class SystemMessageViewHolder extends RecyclerView.ViewHolder {
+        TextView textViewMessage;
+
+        public SystemMessageViewHolder(@NonNull View itemView) {
+            super(itemView);
+            textViewMessage = itemView.findViewById(R.id.textViewMessage);
+        }
+
+        void bind(Message message){
+            textViewMessage.setText(message.getContent());
+            // 可以设置不同的样式，例如居中显示，淡色等
+        }
+    }
+}

src/Elderlycaresystem2/app/src/main/java/com/example/elderlycaresystem2/RetrofitClient.java

@@ -0,0 +1,65 @@
+package com.example.elderlycaresystem2; // 请替换为您的实际包名
+
+import okhttp3.Interceptor;
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.Response;
+import okhttp3.logging.HttpLoggingInterceptor;
+import retrofit2.Retrofit;
+import retrofit2.converter.jackson.JacksonConverterFactory;
+
+import java.io.IOException;
+
+public class RetrofitClient {
+    private static final String BASE_URL = "https://openkey.cloud/"; // 确保以斜杠结尾
+    private static RetrofitClient instance;
+    private ApiService apiService;
+
+    private static final String API_KEY = "sk-ZoGHErXVBPukGFAW0f4f88C51cD84717AfEaBd70A9B7E49d"; // 请替换为您的新API密钥
+
+    private RetrofitClient() {
+        // 日志拦截器（可选，用于调试）
+        HttpLoggingInterceptor logging = new HttpLoggingInterceptor();
+        logging.setLevel(HttpLoggingInterceptor.Level.BODY);
+
+        // 添加 Authorization 拦截器
+        Interceptor authorizationInterceptor = new Interceptor() {
+            @Override
+            public Response intercept(Chain chain) throws IOException {
+                Request originalRequest = chain.request();
+                Request.Builder builder = originalRequest.newBuilder()
+                        .header("Authorization", "Bearer " + API_KEY)
+                        .header("Content-Type", "application/json");
+                Request newRequest = builder.build();
+                return chain.proceed(newRequest);
+            }
+        };
+
+        // 创建 OkHttpClient
+        OkHttpClient client = new OkHttpClient.Builder()
+                .addInterceptor(authorizationInterceptor)
+                .addInterceptor(logging)
+                .build();
+
+        // 创建 Retrofit 实例
+        Retrofit retrofit = new Retrofit.Builder()
+                .baseUrl(BASE_URL)
+                .addConverterFactory(JacksonConverterFactory.create())
+                .client(client)
+                .build();
+
+        // 创建 API 服务
+        apiService = retrofit.create(ApiService.class);
+    }
+
+    public static synchronized RetrofitClient getInstance(){
+        if(instance == null){
+            instance = new RetrofitClient();
+        }
+        return instance;
+    }
+
+    public ApiService getApiService(){
+        return apiService;
+    }
+}

src/Elderlycaresystem2/app/src/main/java/com/example/elderlycaresystem2/SecondFragment.java

@@ -0,0 +1,47 @@
+package com.example.elderlycaresystem2;
+
+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.navigation.fragment.NavHostFragment;
+
+import com.example.elderlycaresystem2.databinding.FragmentSecondBinding;
+
+public class SecondFragment extends Fragment {
+
+    private FragmentSecondBinding binding;
+
+    @Override
+    public View onCreateView(
+            LayoutInflater inflater, ViewGroup container,
+            Bundle savedInstanceState
+    ) {
+
+        binding = FragmentSecondBinding.inflate(inflater, container, false);
+        return binding.getRoot();
+
+    }
+
+    public void onViewCreated(@NonNull View view, Bundle savedInstanceState) {
+        super.onViewCreated(view, savedInstanceState);
+
+        binding.buttonSecond.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                NavHostFragment.findNavController(SecondFragment.this)
+                        .navigate(R.id.action_SecondFragment_to_FirstFragment);
+            }
+        });
+    }
+
+    @Override
+    public void onDestroyView() {
+        super.onDestroyView();
+        binding = null;
+    }
+
+}

src/Elderlycaresystem2/app/src/main/java/com/example/elderlycaresystem2/TalkActivity.java

@@ -0,0 +1,153 @@
+package com.example.elderlycaresystem2;
+
+import android.content.Context;
+import android.content.Intent;
+import android.os.Bundle;
+import android.text.TextUtils;
+import android.util.Log;
+import android.view.View;
+import android.view.inputmethod.InputMethodManager;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.LinearLayout;
+import android.widget.Toast;
+
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+import java.util.ArrayList;
+
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
+
+public class TalkActivity extends AppCompatActivity implements View.OnClickListener{
+
+    private RecyclerView recyclerViewMessages;
+    private EditText editTextMessage;
+    private Button buttonSend;
+    private MessagesAdapter adapter;
+    private ArrayList<Message> messagesList;
+    private ApiService apiService;
+    private LinearLayout btn_talk;
+    private LinearLayout btn_main;
+    private LinearLayout btn_user;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_talk); // 确保布局文件名正确
+
+        recyclerViewMessages = findViewById(R.id.recyclerViewMessages);
+        editTextMessage = findViewById(R.id.editTextMessage);
+        buttonSend = findViewById(R.id.buttonSend);
+
+        messagesList = new ArrayList<>();
+        adapter = new MessagesAdapter(messagesList);
+        recyclerViewMessages.setAdapter(adapter);
+        recyclerViewMessages.setLayoutManager(new LinearLayoutManager(this));
+
+        apiService = RetrofitClient.getInstance().getApiService();
+        btn_talk  = findViewById(R.id.btn_talk);
+        btn_main  = findViewById(R.id.btn_main);
+        btn_user  = findViewById(R.id.btn_user);
+        //底部导航栏
+        btn_talk.setOnClickListener(this);
+        btn_main.setOnClickListener(this);
+        btn_user.setOnClickListener(this);
+
+        // 初始化对话，系统提示
+        addSystemMessage("这是一个专注于老人的助手，可以帮助你解决一些问题。");
+
+        buttonSend.setOnClickListener(view -> {
+            String messageText = editTextMessage.getText().toString().trim();
+            if(!TextUtils.isEmpty(messageText)){
+                sendMessage(messageText);
+                editTextMessage.setText("");
+            }
+        });
+    }
+
+    private void addSystemMessage(String content) {
+        Message systemMessage = new Message("system", content);
+        messagesList.add(systemMessage);
+        adapter.notifyItemInserted(messagesList.size() - 1);
+        recyclerViewMessages.scrollToPosition(messagesList.size() - 1);
+        Log.d("TalkActivity", "系统消息添加: " + content); // 添加日志
+    }
+
+    private void sendMessage(String messageText){
+        // 添加发送的消息到列表
+        Message userMessage = new Message("user", messageText);
+        messagesList.add(userMessage);
+        adapter.notifyItemInserted(messagesList.size() - 1);
+        recyclerViewMessages.scrollToPosition(messagesList.size() - 1);
+        Log.d("TalkActivity", "用户消息添加: " + messageText); // 添加日志
+
+        // 隐藏键盘
+        InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+        if (imm != null) {
+            imm.hideSoftInputFromWindow(editTextMessage.getWindowToken(), 0);
+        }
+
+        // 创建 AIRequest 对象
+        AIRequest request = new AIRequest("gpt-3.5-turbo", 0.7, messagesList);
+
+        // 发送请求
+        Call<AIResponse> call = apiService.getAIReply(request);
+        call.enqueue(new Callback<AIResponse>() {
+            @Override
+            public void onResponse(Call<AIResponse> call, Response<AIResponse> response) {
+                if(response.isSuccessful() && response.body() != null){
+                    AIResponse aiResponse = response.body();
+                    if(aiResponse.getChoices() != null && !aiResponse.getChoices().isEmpty()){
+                        String reply = aiResponse.getChoices().get(0).getMessage().getContent();
+                        Log.d("TalkActivity", "AI 回复: " + reply); // 添加日志
+
+                        // 添加助手的回复到消息列表
+                        Message assistantMessage = new Message("assistant", reply);
+                        messagesList.add(assistantMessage);
+
+                        // 确保在主线程中更新 UI
+                        runOnUiThread(() -> {
+                            adapter.notifyItemInserted(messagesList.size() - 1);
+                            recyclerViewMessages.scrollToPosition(messagesList.size() - 1);
+                            Log.d("TalkActivity", "AI 回复已添加到列表"); // 添加日志
+                        });
+                    } else {
+                        showError("AI 回复为空。");
+                        Log.e("TalkActivity", "AI 回复为空。");
+                    }
+                } else {
+                    showError("AI 回复失败，请稍后再试。");
+                    Log.e("TalkActivity", "AI 回复失败，状态码：" + response.code() + "，响应体：" + response.body());
+                }
+            }
+
+            @Override
+            public void onFailure(Call<AIResponse> call, Throwable t) {
+                showError("网络错误，请检查连接。");
+                Log.e("TalkActivity", "网络错误", t);
+            }
+        });
+    }
+    @Override
+    public void onClick(View v) {
+        if (v.getId() == R.id.btn_talk) {
+            return;
+        } else if (v.getId() == R.id.btn_main) {
+            Intent intent = new Intent(TalkActivity.this,DetectionActivity.class);
+            startActivity(intent);
+            finish();
+        }else {
+            Intent intent = new Intent(TalkActivity.this, UserActivity.class);
+            startActivity(intent);
+            finish();
+        }
+
+    }
+
+    private void showError(String message){
+        Toast.makeText(TalkActivity.this, message, Toast.LENGTH_SHORT).show();
+    }
+}

src/Elderlycaresystem2/app/src/main/java/com/example/elderlycaresystem2/UserActivity.java

@@ -0,0 +1,79 @@
+package com.example.elderlycaresystem2;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+import android.widget.LinearLayout;
+import android.widget.Toast;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+public class UserActivity extends AppCompatActivity implements View.OnClickListener {
+    private LinearLayout btn_talk;
+    private LinearLayout btn_main;
+    private LinearLayout btn_user;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_user);
+
+
+        Button modifyContactButton = findViewById(R.id.modify_contact_button);
+        Button logoutButton = findViewById(R.id.logout_button);
+        Button accButton = findViewById(R.id.modify_acc_button);
+
+        btn_talk  = findViewById(R.id.btn_talk);
+        btn_main  = findViewById(R.id.btn_main);
+        btn_user  = findViewById(R.id.btn_user);
+        // 给开关按钮设置选择监听器，一旦用户点击它，就触发监听器的onCheckedChanged方法
+        //底部导航栏
+        btn_talk.setOnClickListener(this);
+        btn_main.setOnClickListener(this);
+        btn_user.setOnClickListener(this);
+        modifyContactButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                // 处理修改紧急联系人逻辑
+                Toast.makeText(UserActivity.this, "修改紧急联系人", Toast.LENGTH_SHORT).show();
+                Intent intent = new Intent(UserActivity.this, ContactActivity.class);
+                startActivity(intent);
+            }
+        });
+        accButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                // 处理修改摔倒阈值逻辑
+                Toast.makeText(UserActivity.this, "修改摔倒阈值", Toast.LENGTH_SHORT).show();
+                Intent intent = new Intent(UserActivity.this, ChangeActivity.class);
+                startActivity(intent);
+            }
+        });
+
+        logoutButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                // 处理退出软件逻辑
+                Toast.makeText(UserActivity.this, "退出软件", Toast.LENGTH_SHORT).show();
+                finish();
+            }
+        });
+    }
+    @Override
+    public void onClick(View v) {
+        if (v.getId() == R.id.btn_talk) {
+            Intent intent = new Intent(UserActivity.this, TalkActivity.class);
+            startActivity(intent);
+            finish();
+        } else if (v.getId() == R.id.btn_main) {
+            Intent intent = new Intent(UserActivity.this,DetectionActivity.class);
+            startActivity(intent);
+            finish();
+        }else {
+            return;
+        }
+
+    }
+
+}

src/Elderlycaresystem2/app/src/main/res/drawable-v24/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>

src/Elderlycaresystem2/app/src/main/res/drawable/back1.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android" >
+    <!-- 实心 -->
+    <solid android:color="#E8E8E8" />
+    <!-- 边框 -->
+    <!-- 圆角 -->
+    <corners android:radius="0dp" />
+
+    <!-- 设置各边倒角大小 -->
+    <corners
+        android:bottomLeftRadius="0dp"
+        android:bottomRightRadius="0dp"
+        android:topLeftRadius="0dp"
+        android:topRightRadius="0dp" />
+    <!-- This is the line -->
+
+</shape>

src/Elderlycaresystem2/app/src/main/res/drawable/bg_message_received.xml

@@ -0,0 +1,5 @@
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid android:color="#E5E5EA"/>
+    <corners android:radius="16dp"/>
+</shape>

src/Elderlycaresystem2/app/src/main/res/drawable/bg_message_sent.xml

@@ -0,0 +1,6 @@
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid android:color="#0084FF"/>
+    <corners android:radius="16dp"/>
+
+</shape>

src/Elderlycaresystem2/app/src/main/res/drawable/bg_system_message.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid android:color="#F0F0F0"/> <!-- 灰色背景 -->
+    <corners android:radius="8dp"/> <!-- 圆角半径 -->
+</shape>

src/Elderlycaresystem2/app/src/main/res/drawable/edit_text_background.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid android:color="#FFFFFF"/> <!-- 背景颜色 -->
+    <stroke android:width="1dp" android:color="#CCCCCC"/> <!-- 边框 -->
+    <corners android:radius="8dp"/> <!-- 圆角半径 -->
+    <padding
+        android:left="10dp"
+        android:top="10dp"
+        android:right="10dp"
+        android:bottom="10dp" />
+</shape>

src/Elderlycaresystem2/app/src/main/res/drawable/editext_selector.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_focused="true" android:drawable="@drawable/shape_edit_focus"/>
+    <item android:drawable="@drawable/shape_edit_normal"/>
+</selector>

src/Elderlycaresystem2/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>

src/Elderlycaresystem2/app/src/main/res/drawable/shape_edit_focus.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android" >
+
+    <solid android:color="#ffffff" />
+
+    <stroke
+        android:width="3dp"
+        android:color="#ff0000ff" />
+
+    <corners
+        android:bottomLeftRadius="5dp"
+        android:bottomRightRadius="5dp"
+        android:topLeftRadius="5dp"
+        android:topRightRadius="5dp" />
+
+    <padding
+        android:bottom="2dp"
+        android:left="2dp"
+        android:right="2dp"
+        android:top="2dp" />
+
+</shape>

src/Elderlycaresystem2/app/src/main/res/drawable/shape_edit_normal.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android" >
+
+    <solid android:color="#ffffff" />
+
+    <stroke
+        android:width="3dp"
+        android:color="#ffaaaaaa" />
+
+    <corners
+        android:bottomLeftRadius="5dp"
+        android:bottomRightRadius="5dp"
+        android:topLeftRadius="5dp"
+        android:topRightRadius="5dp" />
+
+    <padding
+        android:bottom="2dp"
+        android:left="2dp"
+        android:right="2dp"
+        android:top="2dp" />
+
+</shape>

src/Elderlycaresystem2/app/src/main/res/layout/activity_change.xml

@@ -0,0 +1,90 @@
+<?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="vertical"
+    android:padding="0dp"
+    android:textColor="@color/black"
+    android:background="@color/white">
+
+    <!-- 顶部的标题栏 -->
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="65dp"
+        android:background="@color/white"
+        android:orientation="vertical">
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="60dp"
+            android:background="@drawable/back1"
+            android:orientation="horizontal">
+            <View
+                android:id="@+id/btn_back"
+                android:layout_width="40dp"
+                android:layout_height="40dp"
+                android:layout_gravity="center_vertical"
+                android:background="@drawable/back"/>
+            <TextView
+                android:id="@+id/title"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:gravity=""
+                android:padding="16dp"
+                android:background="@drawable/back1"
+                android:text="摔倒阈值管理"
+                android:textColor="@color/black"
+                android:textSize="20sp"
+                android:textStyle="bold" />
+        </LinearLayout>
+        <View
+            android:layout_width="match_parent"
+            android:layout_height="2dp"
+            android:background="@color/black"/>
+    </LinearLayout>
+    <View
+        android:layout_width="match_parent"
+        android:layout_height="80dp" />
+
+    <EditText
+        android:id="@+id/et_acc"
+        style="@style/text_normal"
+        android:hint="请输入摔倒加速度阈值"
+        android:textColor="@color/black"
+        android:inputType="text"
+        android:textSize="20sp"
+        android:layout_height="60dp"
+        android:layout_gravity="center_horizontal"
+        android:layout_width="400dp"
+        android:background="@drawable/editext_selector" />
+
+    <View
+        android:layout_width="match_parent"
+        android:layout_height="30dp" />
+
+
+    <Button
+        android:id="@+id/btn_queding"
+        android:layout_width="400dp"
+        android:layout_height="70dp"
+        android:layout_marginTop="90dp"
+        android:text="确认修改"
+        android:textSize="20sp"
+        android:layout_gravity="center_horizontal"
+        android:backgroundTint="@color/purple_500"
+        android:textColor="@android:color/white"
+        />
+
+    <!-- 中间的功能按钮 -->
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1"
+        android:gravity="center"
+        android:orientation="vertical">
+
+    </LinearLayout>
+
+    <!-- 底部导航栏 -->
+
+</LinearLayout>

src/Elderlycaresystem2/app/src/main/res/layout/activity_contact.xml

@@ -0,0 +1,101 @@
+<?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="vertical"
+    android:padding="0dp"
+    android:textColor="@color/black"
+    android:background="@color/white">
+
+    <!-- 顶部的标题栏 -->
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="65dp"
+        android:background="@color/white"
+        android:orientation="vertical">
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="60dp"
+            android:background="@drawable/back1"
+            android:orientation="horizontal">
+            <View
+                android:id="@+id/btn_back"
+                android:layout_width="40dp"
+                android:layout_height="40dp"
+                android:layout_gravity="center_vertical"
+                android:background="@drawable/back"/>
+            <TextView
+                android:id="@+id/title"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:gravity=""
+                android:padding="16dp"
+                android:background="@drawable/back1"
+                android:text="紧急联系人管理"
+                android:textColor="@color/black"
+                android:textSize="20sp"
+                android:textStyle="bold" />
+        </LinearLayout>
+        <View
+            android:layout_width="match_parent"
+            android:layout_height="2dp"
+            android:background="@color/black"/>
+    </LinearLayout>
+    <View
+        android:layout_width="match_parent"
+        android:layout_height="80dp" />
+
+    <EditText
+        android:id="@+id/et_name"
+        style="@style/text_normal"
+        android:hint="请输入联系人名字"
+        android:textColor="@color/black"
+        android:inputType="text"
+        android:textSize="20sp"
+        android:layout_height="60dp"
+        android:layout_gravity="center_horizontal"
+        android:layout_width="400dp"
+        android:background="@drawable/editext_selector" />
+
+    <View
+        android:layout_width="match_parent"
+        android:layout_height="30dp" />
+
+    <EditText
+        android:id="@+id/et_phone"
+        style="@style/text_normal"
+        android:hint="请输入电话号码"
+        android:textColor="@color/black"
+        android:inputType="number"
+        android:textSize="20sp"
+        android:layout_height="60dp"
+        android:layout_gravity="center_horizontal"
+        android:layout_width="400dp"
+        android:background="@drawable/editext_selector" />
+
+    <Button
+        android:id="@+id/btn_queding"
+        android:layout_width="400dp"
+        android:layout_height="70dp"
+        android:layout_marginTop="90dp"
+        android:text="确认修改"
+        android:textSize="20sp"
+        android:layout_gravity="center_horizontal"
+        android:backgroundTint="@color/purple_500"
+        android:textColor="@android:color/white"
+        />
+
+    <!-- 中间的功能按钮 -->
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1"
+        android:gravity="center"
+        android:orientation="vertical">
+
+    </LinearLayout>
+
+    <!-- 底部导航栏 -->
+
+</LinearLayout>

src/Elderlycaresystem2/app/src/main/res/layout/activity_detection.xml

@@ -0,0 +1,169 @@
+<?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:orientation="vertical"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:textColor="@color/black"
+    android:background="@color/white">
+    <!-- 顶部的标题栏 -->
+    <!-- 顶部的标题栏 -->
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="65dp"
+        android:background="@color/white"
+        android:orientation="vertical">
+        <TextView
+            android:id="@+id/title"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:gravity="center_horizontal"
+            android:padding="16dp"
+            android:background="@drawable/back1"
+            android:text="摔倒检测"
+            android:textColor="@color/black"
+            android:textSize="21sp"
+            android:textStyle="bold" />
+        <View
+            android:layout_width="match_parent"
+            android:layout_height="2dp"
+            android:background="@color/black"/>
+    </LinearLayout>
+
+
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center_horizontal"
+        android:layout_marginTop="30dp"
+        android:text="跌倒检测控制"
+        android:textColor="@color/primary_text"
+        android:textSize="25sp" />
+    <ImageView
+        android:layout_width="210dp"
+        android:layout_height="210dp"
+        android:layout_gravity="center_horizontal"
+        android:layout_marginTop="30dp"
+        android:layout_marginBottom="50dp"
+        android:src="@drawable/home_main" />
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="79dp"
+        android:background="#BFB06C"
+        android:orientation="horizontal"
+        android:gravity="center_vertical">
+
+        <!-- 状态显示 -->
+        <TextView
+            android:id="@+id/statusTextView"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:text="等待跌倒检测..."
+            android:textSize="18sp" />
+
+        <!-- 控制跌倒检测的 Switch 按钮 -->
+        <Switch
+            android:id="@+id/switch_toggle_detection"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="开启跌倒检测"
+            android:textSize="20dp" />
+    </LinearLayout>
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1"
+        android:gravity="center"
+        android:orientation="vertical">
+
+    </LinearLayout>
+
+    <!-- 底部导航栏 -->
+
+    <LinearLayout
+
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="#E8E8E8"
+        android:orientation="horizontal"
+        android:weightSum="3"
+        android:layout_alignParentBottom="true">
+
+        <LinearLayout
+            android:id="@+id/btn_talk"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:gravity="center"
+            android:orientation="vertical"
+            android:padding="8dp">
+
+            <ImageView
+
+                android:layout_width="24dp"
+                android:layout_height="24dp"
+                android:src="@drawable/talk2"/>
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="聊天"
+                android:textColor="@color/black"
+                android:textSize="18sp" />
+        </LinearLayout>
+
+        <LinearLayout
+            android:id="@+id/btn_main"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:gravity="center"
+            android:orientation="vertical"
+            android:padding="8dp">
+
+            <ImageView
+                android:layout_width="24dp"
+                android:layout_height="24dp"
+                android:src="@drawable/main2"
+                app:tint="@android:color/holo_red_light"/>
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="主页"
+                android:textColor="@android:color/holo_red_light"
+                android:textSize="18sp" />
+        </LinearLayout>
+
+        <LinearLayout
+            android:id="@+id/btn_user"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:gravity="center"
+            android:orientation="vertical"
+            android:padding="8dp">
+
+            <ImageView
+
+                android:layout_width="24dp"
+                android:layout_height="24dp"
+                android:src="@drawable/user2"
+                />
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="我的"
+                android:textColor="@color/black"
+                android:textSize="18sp" />
+        </LinearLayout>
+    </LinearLayout>
+
+
+
+
+</LinearLayout>

src/Elderlycaresystem2/app/src/main/res/layout/activity_main.xml

@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.coordinatorlayout.widget.CoordinatorLayout 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:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".MainActivity">
+
+    <com.google.android.material.appbar.AppBarLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:theme="@style/Theme.Elderlycaresystem2.AppBarOverlay">
+
+        <androidx.appcompat.widget.Toolbar
+            android:id="@+id/toolbar"
+            android:layout_width="match_parent"
+            android:layout_height="?attr/actionBarSize"
+            android:background="?attr/colorPrimary"
+            app:popupTheme="@style/Theme.Elderlycaresystem2.PopupOverlay" />
+
+    </com.google.android.material.appbar.AppBarLayout>
+
+    <include layout="@layout/content_main" />
+
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
+        android:id="@+id/fab"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="bottom|end"
+        android:layout_marginEnd="@dimen/fab_margin"
+        android:layout_marginBottom="16dp"
+        app:srcCompat="@android:drawable/ic_dialog_email" />
+
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

src/Elderlycaresystem2/app/src/main/res/layout/activity_talk.xml

@@ -0,0 +1,157 @@
+<?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:orientation="vertical"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:textColor="@color/black"
+    android:background="@color/white">
+    <!-- 顶部的标题栏 -->
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="65dp"
+        android:background="@color/white"
+        android:orientation="vertical">
+        <TextView
+            android:id="@+id/title"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:gravity="center_horizontal"
+            android:padding="16dp"
+            android:background="@drawable/back1"
+            android:text="聊天"
+            android:textColor="@color/black"
+            android:textSize="21sp"
+            android:textStyle="bold" />
+        <View
+            android:layout_width="match_parent"
+            android:layout_height="2dp"
+            android:background="@color/black"/>
+    </LinearLayout>
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="2"
+        android:gravity="center"
+        android:orientation="vertical">
+
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/recyclerViewMessages"
+            android:layout_width="match_parent"
+            android:layout_height="0dp"
+            android:layout_weight="1"
+            android:padding="8dp" />
+
+        <LinearLayout
+            android:orientation="horizontal"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:padding="8dp">
+
+            <EditText
+                android:id="@+id/editTextMessage"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:hint="输入消息"
+                android:textColor="@color/black"
+                android:padding="8dp"
+                android:background="@drawable/edit_text_background"/>
+
+            <Button
+                android:id="@+id/buttonSend"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="发送"
+                android:layout_marginStart="8dp"/>
+        </LinearLayout>
+    </LinearLayout>
+
+
+    <!-- 底部导航栏 -->
+
+    <LinearLayout
+
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="#E8E8E8"
+        android:orientation="horizontal"
+        android:weightSum="3"
+        android:layout_alignParentBottom="true">
+
+        <LinearLayout
+            android:id="@+id/btn_talk"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:gravity="center"
+            android:orientation="vertical"
+            android:padding="8dp">
+
+            <ImageView
+
+                android:layout_width="24dp"
+                android:layout_height="24dp"
+                android:src="@drawable/talk2"
+                app:tint="@android:color/holo_red_light"/>
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="聊天"
+                android:textColor="@android:color/holo_red_light"
+                android:textSize="18sp" />
+        </LinearLayout>
+
+        <LinearLayout
+            android:id="@+id/btn_main"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:gravity="center"
+            android:orientation="vertical"
+            android:padding="8dp">
+
+            <ImageView
+                android:layout_width="24dp"
+                android:layout_height="24dp"
+                android:src="@drawable/main2"
+                />
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="主页"
+                android:textColor="@color/black"
+                android:textSize="18sp"/>
+        </LinearLayout>
+
+        <LinearLayout
+            android:id="@+id/btn_user"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:gravity="center"
+            android:orientation="vertical"
+            android:padding="8dp">
+
+            <ImageView
+
+                android:layout_width="24dp"
+                android:layout_height="24dp"
+                android:src="@drawable/user2"
+                />
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="我的"
+                android:textColor="@color/black"
+                android:textSize="18sp" />
+        </LinearLayout>
+    </LinearLayout>
+
+
+
+
+</LinearLayout>

src/Elderlycaresystem2/app/src/main/res/layout/activity_user.xml

@@ -0,0 +1,154 @@
+<?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:orientation="vertical"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:textColor="@color/black"
+    android:background="@color/white">
+
+    <!-- 顶部的标题栏 -->
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="65dp"
+        android:background="@color/white"
+        android:orientation="vertical">
+        <TextView
+            android:id="@+id/title"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:gravity="center_horizontal"
+            android:padding="16dp"
+            android:background="@drawable/back1"
+            android:text="我的"
+            android:textColor="@color/black"
+            android:textSize="21sp"
+            android:textStyle="bold" />
+        <View
+            android:layout_width="match_parent"
+            android:layout_height="2dp"
+            android:background="@color/black"/>
+    </LinearLayout>
+
+    <!-- 中间的功能按钮 -->
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1"
+        android:gravity="center"
+        android:background="@color/white"
+        android:orientation="vertical">
+
+        <!-- 修改紧急联系人按钮 -->
+
+        <!-- 添加设备按钮 -->
+        <Button
+            android:id="@+id/modify_contact_button"
+            android:layout_width="350dp"
+            android:layout_height="80dp"
+            android:backgroundTint="@color/purple_500"
+            android:text="修改紧急联系人"
+            android:textSize="30dp"
+            android:textColor="@android:color/white" />
+        <Button
+            android:id="@+id/modify_acc_button"
+            android:layout_width="350dp"
+            android:layout_height="80dp"
+            android:layout_marginTop="50dp"
+            android:backgroundTint="@color/purple_500"
+            android:text="修改摔倒阈值"
+            android:textSize="30dp"
+            android:textColor="@android:color/white" />
+
+        <!-- 退出软件按钮 -->
+        <Button
+            android:id="@+id/logout_button"
+            android:layout_width="350dp"
+            android:layout_height="80dp"
+            android:layout_marginTop="200dp"
+            android:text="退出软件"
+            android:textSize="30dp"
+            android:backgroundTint="@color/purple_500"
+            android:textColor="@android:color/white" />
+    </LinearLayout>
+
+    <!-- 底部导航栏 -->
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="#E8E8E8"
+        android:orientation="horizontal"
+        android:weightSum="3"
+        android:layout_alignParentBottom="true">
+
+        <LinearLayout
+            android:id="@+id/btn_talk"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:gravity="center"
+            android:orientation="vertical"
+            android:padding="8dp">
+
+            <ImageView
+                android:layout_width="24dp"
+                android:layout_height="24dp"
+                android:src="@drawable/talk2"/>
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="聊天"
+                android:textColor="@color/black"
+                android:textSize="18sp" />
+        </LinearLayout>
+
+        <LinearLayout
+            android:id="@+id/btn_main"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:gravity="center"
+            android:orientation="vertical"
+            android:padding="8dp">
+
+            <ImageView
+                android:layout_width="24dp"
+                android:layout_height="24dp"
+                android:src="@drawable/main2"
+                />
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="主页"
+                android:textColor="@color/black"
+                android:textSize="18sp" />
+        </LinearLayout>
+
+        <LinearLayout
+            android:id="@+id/btn_user"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:gravity="center"
+            android:orientation="vertical"
+            android:padding="8dp">
+
+            <ImageView
+                android:layout_width="24dp"
+                android:layout_height="24dp"
+                android:src="@drawable/user2"
+                app:tint="@android:color/holo_red_light"
+                />
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="我的"
+                android:textColor="@android:color/holo_red_light"
+                android:textSize="18sp" />
+        </LinearLayout>
+    </LinearLayout>
+</LinearLayout>

src/Elderlycaresystem2/app/src/main/res/layout/content_main.xml

@@ -0,0 +1,19 @@
+<?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"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    app:layout_behavior="@string/appbar_scrolling_view_behavior">
+
+    <fragment
+        android:id="@+id/nav_host_fragment_content_main"
+        android:name="androidx.navigation.fragment.NavHostFragment"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        app:defaultNavHost="true"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:navGraph="@navigation/nav_graph" />
+</androidx.constraintlayout.widget.ConstraintLayout>

src/Elderlycaresystem2/app/src/main/res/layout/fragment_first.xml

@@ -0,0 +1,28 @@
+<?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:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".FirstFragment">
+
+    <TextView
+        android:id="@+id/textview_first"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/hello_first_fragment"
+        app:layout_constraintBottom_toTopOf="@id/button_first"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <Button
+        android:id="@+id/button_first"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/next"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/textview_first" />
+</androidx.constraintlayout.widget.ConstraintLayout>

src/Elderlycaresystem2/app/src/main/res/layout/fragment_second.xml

@@ -0,0 +1,27 @@
+<?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:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".SecondFragment">
+
+    <TextView
+        android:id="@+id/textview_second"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        app:layout_constraintBottom_toTopOf="@id/button_second"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <Button
+        android:id="@+id/button_second"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/previous"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/textview_second" />
+</androidx.constraintlayout.widget.ConstraintLayout>

src/Elderlycaresystem2/app/src/main/res/layout/item_message_received.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="horizontal"
+    android:gravity="start"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:padding="8dp">
+
+    <TextView
+        android:id="@+id/textViewMessage"
+        android:background="@drawable/bg_message_received"
+        android:textColor="#000000"
+        android:padding="10dp"
+        android:textSize="25dp"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"/>
+</LinearLayout>

src/Elderlycaresystem2/app/src/main/res/layout/item_message_sent.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="horizontal"
+    android:gravity="end"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:padding="8dp">
+
+    <TextView
+        android:id="@+id/textViewMessage"
+        android:background="@drawable/bg_message_sent"
+        android:textColor="#FFFFFF"
+        android:padding="10dp"
+        android:textSize="25dp"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"/>
+</LinearLayout>

src/Elderlycaresystem2/app/src/main/res/layout/item_message_system.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="horizontal"
+    android:gravity="center"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:padding="8dp">
+
+    <TextView
+        android:id="@+id/textViewMessage"
+        android:background="@drawable/bg_system_message"
+        android:textColor="#888888"
+        android:padding="10dp"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"/>
+</LinearLayout>

src/Elderlycaresystem2/app/src/main/res/menu/menu_main.xml

@@ -0,0 +1,10 @@
+<menu 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"
+    tools:context="com.example.elderlycaresystem2.MainActivity">
+    <item
+        android:id="@+id/action_settings"
+        android:orderInCategory="100"
+        android:title="@string/action_settings"
+        app:showAsAction="never" />
+</menu>

src/Elderlycaresystem2/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

src/Elderlycaresystem2/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

src/Elderlycaresystem2/app/src/main/res/mipmap-anydpi-v33/ic_launcher.xml

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