Android检测手机耳机插拔的代码

AudioManager就有这个方法：isWiredHeadsetOn()；

如果插入了耳机，就返回true,否则false;

当然，要加个权限，不然一直是返回false。

    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />  

实时检测耳机插入和拔出：

每当插入和拔出耳机时，系统都会发送Intent广播， 所以，只需要用一个receiver把这个广播intent（获取的action是：“android.intent.action.HEADSET_PLUG”）截获就好。

这个receiver必须要用代码注册，而不能写在manifest里面用写入内存的方式。

在Android下实现检测耳机插入和拔出，也即建立一个Broadcast Receiver，监听“android.intent.action.HEADSET_PLUG”广播

但直接在AndroidManifest.xml中添加一个<receiver>标签是无效的，如：

    <receiver android:name=".HeadsetPlugReceiver">          <intent-filter>            <action android:name="android.intent.action.HEADSET_PLUG" android:enabled="true"></action>          </intent-filter>          </receiver>  

你会发现Receiver的onReceive事件永远不会被触发，解决方法就是手动编写代码注册该广播。

首先，创建一个BroadcastReceiver的子类，用于监听耳机插入和拔出：

    public class HeadsetPlugReceiver extends BroadcastReceiver {                      private static final String TAG = "HeadsetPlugReceiver";                      @Override              public void onReceive(Context context, Intent intent) {                if (intent.hasExtra("state")){                  if (intent.getIntExtra("state", 0) == 0){                  Toast.makeText(context, "headset not connected", Toast.LENGTH_LONG).show();                  }                  else if (intent.getIntExtra("state", 0) == 1){                    Toast.makeText(context, "headset connected", Toast.LENGTH_LONG).show();                  }                }              }                  }    

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

参考：http://outofmemory.cn/code-snippet/970/android-detect-user-shifou-cha-erji
来自：http://blog.csdn.net/jerome_xx/article/details/8711579