Detecting whether a headset is plugged into an Android device or not.
AudioManager.isWiredHeadsetOn()
always return false
because it requires user-permission MODIFY_AUDIO_SETTINGS
.
I spent several days while found answer. There are no info about this in official documentation. And this bug
already registered in BugTracker
.
You can use the broadcast receiver.
So, You might write this code in "AndroidManifest.xml"
<receiver android:name="com.juno.brheadset.HeadsetStateReceiver">
<intent-filter>
<action android:name="android.intent.action.HEADSET_PLUG"/>
</intent-filter>
</receiver>-->
But, This doesn't work. When OS send this "HEADSET_PLUG" intent, OS set the flag "Intent.FLAG_RECEIVER_REGISTERED_ONLY" So, You should write the code like below in Activity or Service class instead of "AndroidManifest" things.
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 );
}
I hope this article help you. Bye!
This is the part of "HeadsetObserver.java", Android SDK Source.
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);
}
}
When you say "headset", do you mean "wired headset"? If so, there's an intent to detect whether or not one is being plugged or unplugged: ACTION_HEADSET_PLUG
.
To check the status, you can use AudioManager.isWiredHeadsetOn()
, although that may return false if there is also a bluetooth headset, and audio is routed to that instead.