如何获取耳机是否已插入和耳机实时插拔情况？

1、在一般的程序中检测手机是否已插入耳机的情况：

<pre name="code" class="java">    AudioManager localAudioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE); 
    boolean hasHeadset = localAudioManager.isWiredHeadsetOn();

<span style="font-size:18px;"><uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" /></span>

 耳机的插拔事件，android系统都会发出广播告知用户。我们在程序中需要去接收这个广播，在AndroidManifest.xml文件中写死是无效的，具体原因有待研究，网上查了一下说是“sticky” event。

走到这里就只能手动的在代码里面动态注册了啊！创建一个子类，继承自BroadcastReceiver,用于监听耳机的插拔情况。

public class HeadsetReceiver extends BroadcastReceiver {   
   
    @Override   
    public void onReceive(Context context, Intent intent) {   
      if (intent.hasExtra("state")){   
        if (intent.getIntExtra("state", 0) == 0){ //耳机插入
          Toast.makeText(context, "headset is not plug", Toast.LENGTH_LONG).show();   
        }   
        else if (intent.getIntExtra("state", 0) == 1){ //耳机拔出
          Toast.makeText(context, "headset is plug", Toast.LENGTH_LONG).show();   
        }   
      }   
    }    
}<pre name="code" class="java">

public class TestHeadSetPlugActivity extends Activity { 
private HeadsetReceiver headsetReceiver; 
/** Called when the activity is first created. */ 
@Override 
public void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.activity_main); 
/* register receiver */ 
registerHeadsetPlugReceiver(); 
} 
private void registerHeadsetPlugReceiver() { 
	headsetReceiver = new HeadsetReceiver(); 
IntentFilter intentFilter = new IntentFilter(); 
intentFilter.addAction("android.intent.action.HEADSET_PLUG"); 
registerReceiver(HeadsetReceiver, intentFilter); 
} 
@Override 
public void onDestroy() { 
unregisterReceiver(HeadsetReceiver); 
super.onDestroy(); 
} 
} 

如何获取耳机是否已插入和耳机实时插拔情况？

原文：http://blog.csdn.net/lisineng/article/details/44654137