Android(安卓)距离感应器和耳机状态监测(控制Audio输出通道切换)

* 切换扬声器播放声音 or 听筒播放
* 1. 距离感应器：继承SensorEventListener这个监听，重写onSensorChanged方法
* 2. 检测耳机插入和拔出：HeadsetPlugReceiver监听广播AudioManager.ACTION_AUDIO_BECOMING_NOISY和"android.intent.action.HEADSET_PLUG"，

* 3. 切换扬声器模式和听筒模式需要增加权限： <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS"></uses-permission>

下面是核心代码：

1. 距离感应器监听方法：

/* * 实现SensorEventListener需要实现的两个方法。 */@Overridepublic void onSensorChanged(SensorEvent event) {// TODO Auto-generated method stubf_proximiny = event.values[0];if (f_proximiny >= mProximiny.getMaximumRange()) {Log.i("==================>onSensorChanged", "MODE_NORMAL");audioManager.setMode(AudioManager.MODE_NORMAL);} else {Log.i("==================>onSensorChanged", "MODE_IN_CALL");audioManager.setMode(AudioManager.MODE_IN_CALL);}}

2. 耳机插拔监听：

2.1 广播注册：

myNoisyAudioStreamReceiver = new HeadsetPlugReceiver();IntentFilter intentFilter = new IntentFilter(AudioManager.ACTION_AUDIO_BECOMING_NOISY);intentFilter.addAction("android.intent.action.HEADSET_PLUG");registerReceiver(myNoisyAudioStreamReceiver, intentFilter);

2.2 广播监听：

public class HeadsetPlugReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { Log.i("NoisyAudioStreamReceiver=====================>", "change mode");if (intent.hasExtra("state")){ if (intent.getIntExtra("state", 0) == 0){ Log.i("NoisyAudioStreamReceiver=====================>headset not connected", "change mode1");audioManager.setMode(AudioManager.MODE_NORMAL);} else if (intent.getIntExtra("state", 0) == 1){ Log.i("NoisyAudioStreamReceiver=====================>headset connected", "change mode3");audioManager.setMode(AudioManager.MODE_IN_CALL);} } } }

2.3 广播注销：

@Overrideprotected void onDestroy() {super.onDestroy();unregisterReceiver(myNoisyAudioStreamReceiver);}

Demo下载：

Android 距离感应控制Audio输出通道

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