Android 监听耳机外放设备

Android 设备插拔耳机状态监听；播放视频，音频切换（外放，耳机）.

核心代码：

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothHeadset;
import android.bluetooth.BluetoothProfile;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Build;

import tv.buka.roomSdk.util.LogUtil;

/**
* 耳机状态监听
* 注册广播监听
*
*/
public class HeadsetPlugReceiver extends BroadcastReceiver {
private static final String TAG = "HeadsetPlugReceiver";

private HeadsetPlugListener mHeadsetPlugListener;

public HeadsetPlugReceiver(HeadsetPlugListener headsetPlugListener) {
this.mHeadsetPlugListener = headsetPlugListener;
}

@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED.equals(action)) {
LogUtil.e(TAG, action);
BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
int state = adapter.getProfileConnectionState(BluetoothProfile.HEADSET);
if (BluetoothProfile.STATE_CONNECTED == state) {
mHeadsetPlugListener.onHeadsetPlug(true);
}
if (BluetoothProfile.STATE_CONNECTED == state) {
mHeadsetPlugListener.onHeadsetPlug(false);
}
}
} else if (Intent.ACTION_HEADSET_PLUG.equals(action)) {
if (intent.hasExtra("state")) {
if (intent.getIntExtra("state", 0) == 0) {
//外放
mHeadsetPlugListener.onHeadsetPlug(true);
} else if (intent.getIntExtra("state", 0) == 1) {
//耳机
mHeadsetPlugListener.onHeadsetPlug(false);
}
}
}
}

public interface HeadsetPlugListener {
void onHeadsetPlug(boolean isPlug);//true说明没有耳机 false说明有耳机
}
}

//耳机植入监听 1、具体使用的类调用
mHeadsetPlugReceiver = new HeadsetPlugReceiver(new HeadsetPlugReceiver.HeadsetPlugListener() {
@Override
public void onHeadsetPlug(boolean isPlug) {

// 接口回调 isPlug ----监听的状态
       if (isPlug) {
           if (BluetoothProfile.STATE_CONNECTED == adapter.getProfileConnectionState(BluetoothProfile.HEADSET)) {
               //蓝牙设备输出

  microSpeaker(context)；
           } else if (BluetoothProfile.STATE_DISCONNECTED == adapter.getProfileConnectionState(BluetoothProfile.HEADSET)) {
               //外放

   loudSpeaker(context)
           } else {
               //外放

loudSpeaker(context)
           }
       } else {
           //耳机输出

microSpeaker(context)
}
}
});

// 2.注册广播放在页面初始化的地方.
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(Intent.ACTION_HEADSET_PLUG);
intentFilter.addAction(BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED);
registerReceiver(mHeadsetPlugReceiver, intentFilter);

// 3.处理音频外放，还是当前耳机播放

//外放
public void loudSpeaker(Activity context) {
   AudioManager audioManager = (AudioManager)context.getSystemService("audio");
   audioManager.setSpeakerphoneOn(true);
   context.setVolumeControlStream(0);
   audioManager.setMode(0);
}

//内放
public void microSpeaker(Activity context) {
   AudioManager audioManager = (AudioManager)context.getSystemService("audio");
   audioManager.setSpeakerphoneOn(false);
   context.setVolumeControlStream(0);
   audioManager.setMode(0);
}

https://blog.csdn.net/huangwenkui1990/article/details/94554305

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