Android设备实时监控蓝牙的连接、配对、开关3种状态

embedded/2024/10/20 20:56:03/

一、简介

Android设备，需要实时监控本机蓝牙连接其他蓝牙设备的状态，包含：连接、配对、开关3种状态。本文介绍了2种方法，各有优势，下面来到我的Studio一起瞅瞅吧~

二、定时器任务 + Handler + 功能方法

定时器任务 + Handler + 功能方法，此组合适用于页面初始化时、页面创建完毕后的2种情况，更新蓝牙连接状态的界面UI。

2.1 定时器任务

java">//在页面初始化加载时引用
updateInfoTimerTask();private void updateInfoTimerTask() {MyTimeTask infoTimerTask = new MyTimeTask(1000, new TimerTask() {@Overridepublic void run() {mHandler.sendEmptyMessage(1);}});infoTimerTask.start();
}//定时器任务工具类
import java.util.Timer;
import java.util.TimerTask;public class MyTimeTask {private Timer timer;private TimerTask task;private long time;public MyTimeTask(long time, TimerTask task) {this.task = task;this.time = time;if (timer == null){timer = new Timer();}}public void start(){//每隔 time时间段 就执行一次timer.schedule(task, 0, time);}public void stop(){if (timer != null) {timer.cancel();if (task != null) {//将原任务从队列中移除task.cancel();}}}
}

2.2 Handler

java">private Handler mHandler = new Handler() {public void handleMessage(Message msg) {switch (msg.what) {case 1: {//使用Handler发送定时任务消息，在页面初始化和应用运行中实时更新蓝牙的连接状态checkBtDeviceConnectionStates(mContext);}break;}}
};

2.3 功能方法

java">public void checkBtDeviceConnectionStates(Context context) {BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();if (bluetoothAdapter == null || !bluetoothAdapter.isEnabled()) {Log.i(TAG,   "checkBtDeviceConnectionStates()：蓝牙设备不支持 或 未开启蓝牙");//更新界面UIitemTvLogBtStatus.setText(R.string.bt_connect_state_off);return;}Set<BluetoothDevice> pairedDevices = bluetoothAdapter.getBondedDevices();if (pairedDevices != null && !pairedDevices.isEmpty()) {for (BluetoothDevice device : pairedDevices) {// 检查 A2DP 连接状态（以 A2DP 为例）boolean a2dpState = bluetoothAdapter.getProfileProxy(context, new BluetoothProfile.ServiceListener() {@Overridepublic void onServiceConnected(int profile, BluetoothProfile proxy) {if (profile == BluetoothProfile.A2DP) {// 连接状态检查需要在这里进行，因为这是在服务连接后的回调中int connectionState = ((BluetoothA2dp) proxy).getConnectionState(device);switch (connectionState) {case BluetoothProfile.STATE_CONNECTED:itemTvLogBtStatus.setText(R.string.bt_connect_state_on);Log.i(TAG,   "checkBtDeviceConnectionStates()：蓝牙设备 已连接");break;case BluetoothProfile.STATE_CONNECTING:Log.i(TAG,   "checkBtDeviceConnectionStates()：蓝牙设备 正在连接");break;case BluetoothProfile.STATE_DISCONNECTED:itemTvLogBtStatus.setText(R.string.bt_connect_state_off);Log.i(TAG,   "checkBtDeviceConnectionStates()：蓝牙设备 未连接");break;case BluetoothProfile.STATE_DISCONNECTING:Log.i(TAG,   "checkBtDeviceConnectionStates()：蓝牙设备 正在断开连接");break;}// 注意：在检查完连接状态后，应该注销代理bluetoothAdapter.closeProfileProxy(profile,  proxy);}}@Overridepublic void onServiceDisconnected(int profile) {// 蓝牙服务断开连接的处理}}, BluetoothProfile.A2DP);// 注意：上述 getProfileProxy 方法是异步的，并立即返回。// 因此，上述的 connectionState 检查实际上是在回调中完成的。// 如果你需要同步检查连接状态，那么可能需要一个更复杂的设计，例如使用 FutureTask 或 RxJava。// 如果你不需要等待服务连接的结果，可以跳过 a2dpState 的值，因为这是一个整数，它通常表示服务连接的状态（不是设备的连接状态）// 如果你需要检查其他蓝牙配置文件的连接状态，只需将 BluetoothProfile.A2DP 替换为相应的配置文件常量即可}}}

三、Interface + Listener + 实现类

Interface + Listener + 实现类，此组合可实现监控蓝牙的连接、配对、开关3种状态，适用于页面创建完毕后。

3.1 Interface

java">public interface BluetoothInterface {//监听手机本身蓝牙的状态void listenBluetoothConnectState(int state);int ACTION_STATE_OFF = 10;int ACTION_STATE_TURNING_OFF = 11;int ACTION_STATE_ON = 12;int ACTION_STATE_TURNING_ON = 13;//监听蓝牙设备的配对状态void listenBluetoothBondState(int state);int ACTION_BOND_NONE = 1;int ACTION_BOND_BONDING = 2;int ACTION_BOND_BONDED = 3;//监听蓝牙设备连接和连接断开的状态void listenBluetoothDeviceState(int state);int ACTION_ACL_CONNECTED = 1;int ACTION_ACL_DISCONNECT_REQUESTED = 0;int ACTION_ACL_DISCONNECTED = -1;}

3.2 Listener

Listener类，实际作用是启用BroadcastReceiver监听功能的包装工具类。

java">import android.Manifest;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.util.Log;
import androidx.core.app.ActivityCompat;//监听蓝牙设备状态的广播
public class BluetoothListener {public static final String TAG = BluetoothListener.class.getSimpleName();private Context mContext;private BluetoothInterface mBluetoothInterface;public BluetoothListener(Context context, BluetoothInterface bluetoothInterface) {this.mContext = context;this.mBluetoothInterface = bluetoothInterface;observeBluetooth();getBluetoothDeviceStatus();}public void observeBluetooth() {IntentFilter lIntentFilter = new IntentFilter();lIntentFilter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);       //蓝牙开关状态变化lIntentFilter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);   //蓝牙设备配对状态变化lIntentFilter.addAction(BluetoothDevice.ACTION_ACL_CONNECTED);        //蓝牙已连接状态变化lIntentFilter.addAction(BluetoothDevice.ACTION_ACL_DISCONNECTED);     //蓝牙断开连接状态变化lIntentFilter.addAction(BluetoothDevice.ACTION_ACL_DISCONNECT_REQUESTED);   //蓝牙即将断开连接状态变化mContext.registerReceiver(blueToothReceiver, lIntentFilter);}//判断蓝牙当前 开启/关闭 状态public boolean getBluetoothDeviceStatus() {BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();boolean isEnabled = bluetoothAdapter.isEnabled();Log.i(TAG, "蓝牙当前状态 ：" + isEnabled);return isEnabled;}public BroadcastReceiver blueToothReceiver = new BroadcastReceiver() {@Overridepublic void onReceive(Context context, Intent intent) {String action = intent.getAction();Log.i(TAG, "蓝牙广播监听事件 onReceive，action：" + action);//监听手机本身蓝牙状态的广播：手机蓝牙开启、关闭时发送if (action.equals(BluetoothAdapter.ACTION_STATE_CHANGED)) {int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.ERROR);switch (state) {case BluetoothAdapter.STATE_OFF:Log.i(TAG, "STATE_OFF 手机蓝牙 已关闭");mBluetoothInterface.listenBluetoothConnectState(BluetoothInterface.ACTION_STATE_OFF);break;case BluetoothAdapter.STATE_TURNING_OFF:Log.i(TAG, "STATE_TURNING_OFF 手机蓝牙 正在关闭");mBluetoothInterface.listenBluetoothConnectState(BluetoothInterface.ACTION_STATE_TURNING_OFF);break;case BluetoothAdapter.STATE_ON:Log.i(TAG, "STATE_ON 手机蓝牙 已开启");mBluetoothInterface.listenBluetoothConnectState(BluetoothInterface.ACTION_STATE_ON);break;case BluetoothAdapter.STATE_TURNING_ON:Log.i(TAG, "STATE_TURNING_ON 手机蓝牙 正在开启");mBluetoothInterface.listenBluetoothConnectState(BluetoothInterface.ACTION_STATE_TURNING_ON);break;}}//监听蓝牙设备配对状态的广播：蓝牙设备配对和解除配对时发送else if (action.equals(BluetoothDevice.ACTION_BOND_STATE_CHANGED)) {int state = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE, -1);switch (state) {case BluetoothDevice.BOND_NONE:Log.i(TAG, "BOND_NONE 删除配对设备");mBluetoothInterface.listenBluetoothBondState(BluetoothInterface.ACTION_BOND_NONE);break;case BluetoothDevice.BOND_BONDING:mBluetoothInterface.listenBluetoothBondState(BluetoothInterface.ACTION_BOND_BONDING);Log.i(TAG, "BOND_NONE BOND_BONDING 正在配对");break;case BluetoothDevice.BOND_BONDED:mBluetoothInterface.listenBluetoothBondState(BluetoothInterface.ACTION_BOND_BONDED);Log.i(TAG, "BOND_BONDED 配对成功");break;}}//监听蓝牙设备连接和连接断开的广播：蓝牙设备连接上和断开连接时发送, 这两个监听的是底层的连接状态else if (action.equals(BluetoothDevice.ACTION_ACL_CONNECTED)) {mBluetoothInterface.listenBluetoothDeviceState(BluetoothInterface.ACTION_ACL_CONNECTED);BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);assert device != null;if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.BLUETOOTH_CONNECT) != PackageManager.PERMISSION_GRANTED) {Log.i(TAG, "CONNECTED，蓝牙设备连接异常：权限拒绝！");return;}Log.i(TAG, "CONNECTED，蓝牙设备连接成功：" + device.getName());} else if (action.equals(BluetoothDevice.ACTION_ACL_DISCONNECTED)){mBluetoothInterface.listenBluetoothDeviceState(BluetoothInterface.ACTION_ACL_DISCONNECTED);BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);assert device != null;if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.BLUETOOTH_CONNECT) != PackageManager.PERMISSION_GRANTED) {Log.i(TAG, "DISCONNECTED，蓝牙设备断开连接：权限拒绝！");return;}Log.i(TAG, "DISCONNECTED，蓝牙设备断开连接：" + device.getName());} else if (action.equals(BluetoothDevice.ACTION_ACL_DISCONNECT_REQUESTED)){mBluetoothInterface.listenBluetoothDeviceState(BluetoothInterface.ACTION_ACL_DISCONNECT_REQUESTED);BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);assert device != null;if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.BLUETOOTH_CONNECT) != PackageManager.PERMISSION_GRANTED) {Log.i(TAG, "DISCONNECT_REQUESTED，蓝牙设备即将断开连接：权限拒绝！");return;}Log.i(TAG, "DISCONNECT_REQUESTED，蓝牙设备即将断开连接：" + device.getName());}}};public void close(){if (blueToothReceiver != null){mContext.unregisterReceiver(blueToothReceiver);}if (mContext != null){mContext = null;}Log.d(TAG, "close()");}
}

3.3 实现类

java">public class 你的Activity或Fragment或View封装类 implements BluetoothInterface {private static String TAG = LogStatusView.class.getSimpleName();private Context mContext;private 你的Activity或Fragment或View封装类(Context context) {this.mContext = context.getApplicationContext();//蓝牙广播监听事件mBluetoothListener = new BluetoothListener(mContext, this);}@Overridepublic void listenBluetoothConnectState(int state) {if(state == ACTION_STATE_ON){bluetoothConnectState = 0;Log.i(TAG, "setBluetoothConnectState，手机蓝牙 已开启：" + state);} else if (state == ACTION_STATE_OFF){bluetoothConnectState = 1;Log.i(TAG, "setBluetoothConnectState，手机蓝牙 已关闭：" + state);}}@Overridepublic void listenBluetoothBondState(int state) {if(state == ACTION_BOND_BONDING){Log.i(TAG, "setBluetoothBondState，蓝牙正在配对：" + state);} else if (state == ACTION_BOND_BONDED){Log.i(TAG, "setBluetoothBondState，蓝牙配对成功：" + state);}}@Overridepublic void listenBluetoothDeviceState(int state) {if(state == ACTION_ACL_CONNECTED){itemTvLogBtStatus.setText(R.string.bt_connect_state_on);Log.i(TAG, "setBluetoothDeviceState，蓝牙设备连接成功：" + state);} else if (state == ACTION_ACL_DISCONNECTED){itemTvLogBtStatus.setText(R.string.bt_connect_state_off);Log.i(TAG, "setBluetoothDeviceState，蓝牙设备断开连接：" + state);}}//资源回收/注销代理方法public void onReset() {if (mBluetoothListener != null){mBluetoothListener.close();}Log.i(TAG, "onReset()");}}

四、小结

以上就是我对这个功能的简单介绍，创作这篇文章是基于项目中的开发需求，记录一下，分享在此，有需要者请自取，写完收工。


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