您可以使用广播接收器。

因此，您可以在“ AndroidManifest.xml”中编写此代码

-->

但是，这不起作用。当OS发送此“ HEADSET_PLUG”意图时，OS设置标志“ Intent.FLAG_RECEIVER_located_ONLY”。因此，您应在Activity或Service类中编写如下代码，而不是“ AndroidManifest”。

public class BRHeadsetActivity extends Activity {

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

IntentFilter receiverFilter = new IntentFilter(Intent.ACTION_HEADSET_PLUG);

HeadsetStateReceiver receiver = new HeadsetStateReceiver();

registerReceiver( receiver, receiverFilter );

}

希望本文对您有所帮助。再见！

这是Android SDK源代码“ HeadsetObserver.java”的一部分。

private final void sendIntent(int headset, int headsetState, int prevHeadsetState, String headsetName) {

if ((headsetState & headset) != (prevHeadsetState & headset)) {

//  Pack up the values and broadcast them to everyone

Intent intent = new Intent(Intent.ACTION_HEADSET_PLUG);

**intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY);**

int state = 0;

int microphone = 0;

if ((headset & HEADSETS_WITH_MIC) != 0) {

microphone = 1;

}

if ((headsetState & headset) != 0) {

state = 1;

}

intent.putExtra("state", state);

intent.putExtra("name", headsetName);

intent.putExtra("microphone", microphone);

if (LOG) Slog.v(TAG, "Intent.ACTION_HEADSET_PLUG: state: "+state+" name: "+headsetName+" mic: "+microphone);

// TODO: Should we require a permission?

ActivityManagerNative.broadcastStickyIntent(intent, null);

}

}