I’m developing an Android application and I want it to interact with headset button clicks. I’m testing it in a Nexus 5 with Android KitKat 4.4.
I tried first with a simple headset (not wireless). The button event received was KEYCODE_HEADSETHOOK (79). I created a MEDIA_BUTTON receiver to handle its clicks:
<receiver android:name="com.example.mytest.SearchActivity$MediaButtonIntentReceiver">
<intent-filter>
<intent-filter android:priority="1000000000">
<action android:name="android.intent.action.MEDIA_BUTTON" />
</intent-filter>
</intent-filter>
</receiver>
This is the activity holding the receiver:
public class SearchActivity extends Activity {
private AudioManager mAudioManager;
private ComponentName mAudioReceiver;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.search);
mAudioManager = (AudioManager) getSystemService(AUDIO_SERVICE);
mAudioReceiver = new ComponentName(getPackageName(),
MediaButtonIntentReceiver.class.getName());
}
@Override
protected void onResume() {
super.onResume();
mAudioManager.registerMediaButtonEventReceiver(mAudioReceiver);
}
@Override
protected void onPause() {
super.onPause();
mAudioManager.unregisterMediaButtonEventReceiver(mAudioReceiver);
}
public static class MediaButtonIntentReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Log.d("SA", "ON RECEIVE");
...
abortBroadcast();
}
}
}
This code works with my wired headset only if the user performs a short click. Performing a long click opens Google Voice Search. I’d like to capture long clicks too, but I don’t mind if it’s not possible.
After that I tested it with a bluetooth headset. Specifically, I’m using Moveteck Bluetooth Headset BH119A (you can see an image at the bottom of this post). This headset only has one button, and if I press it the following "activity" is opened:
I’d like to capture this click event too if my Activity is opened. How can I do it? I tried adding the following filters to my receiver, but it’s not working either:
<action android:name="android.bluetooth.headset.action.VENDOR_SPECIFIC_HEADSET_EVENT" />
<action android:name="android.intent.action.VOICE_COMMAND" />
<action android:name="android.intent.action.CALL_BUTTON" />
I also tried overriding onKeyDown in my Activity, but it’s not triggered.
Anybody knows how can I intercept those events?
This is my bluetooth headset:
** EDIT **
Following Toaster’s advice, I checked the whole log looking for the events my headset triggers.
Wired headset long click
This is the log when I long click in my wired headset (it opens Google Voice Search):
12-10 09:24:36.644: I/MediaFocusControl(740): voice-based interactions: about to use ACTION_WEB_SEARCH
12-10 09:24:36.644: I/ActivityManager(740): START u0 {act=android.speech.action.WEB_SEARCH flg=0x10800000 cmp=com.google.android.googlequicksearchbox/.SearchActivity} from pid 740
12-10 09:24:36.754: I/ActivityManager(740): START u0 {act=android.speech.action.WEB_SEARCH flg=0x10000000 cmp=com.google.android.googlequicksearchbox/com.google.android.launcher.GEL} from pid 10153
12-10 09:24:36.764: I/InputDispatcher(740): Dropping event because there is no focused window or focused application.
12-10 09:24:36.764: I/InputDispatcher(740): Dropping event because there is no focused window or focused application.
12-10 09:24:36.774: I/GEL(1025): handleIntent(Intent { act=android.speech.action.WEB_SEARCH flg=0x10400000 cmp=com.google.android.googlequicksearchbox/com.google.android.launcher.GEL })
12-10 09:24:36.774: V/SearchControllerCache(10153): creating SearchController
12-10 09:24:36.804: I/AudioRouter(10153): ROUTE_NONE->ROUTE_NO_BLUETOOTH
12-10 09:24:36.804: I/MediaFocusControl(740): AudioFocus requestAudioFocus() from android.media.AudioManager@4267ad58com.google.android.voicesearch.audio.AudioRouterImpl$1@42695f60
12-10 09:24:36.804: I/Velvet.SdchManager(10153): Sdch cache load complete.
12-10 09:24:36.814: W/IInputConnectionWrapper(18407): showStatusIcon on inactive InputConnection
12-10 09:24:36.814: I/Icing.InternalIcingCorporaProvider(10153): Updating corpora: A: NONE, C: DELTA
12-10 09:24:36.854: I/VS.G3EngineManager(10153): create_rm: m=GRAMMAR,l=en-US
12-10 09:24:36.854: W/Search.ConcurrentUtils(10153): Executor queue length is now 9. Perhaps some tasks are too long, or the pool is too small. [GrecoExecutor-1]
12-10 09:24:36.854: I/VS.G3EngineManager(10153): Brought up new g3 instance :/system/usr/srec/en-US/grammar.config for: en-USin: 9 ms
12-10 09:24:36.864: D/audio_hw_primary(189): out_set_parameters: enter: usecase(1: low-latency-playback) kvpairs: routing=4
12-10 09:24:36.864: D/audio_hw_primary(189): select_devices: out_snd_device(4: headphones) in_snd_device(0: )
12-10 09:24:36.874: D/audio_hw_primary(189): select_devices: out_snd_device(0: ) in_snd_device(18: headset-mic)
12-10 09:24:36.874: D/(189): Failed to fetch the lookup information of the device 00000008
12-10 09:24:36.874: E/ACDB-LOADER(189): Error: ACDB AudProc vol returned = -19
12-10 09:24:38.864: I/LATENCY(10153): 0-4,45-2064,
12-10 09:24:38.874: I/AudioRouter(10153): ROUTE_NO_BLUETOOTH->ROUTE_NONE
12-10 09:24:38.874: I/MediaFocusControl(740): AudioFocus abandonAudioFocus() from android.media.AudioManager@4267ad58com.google.android.voicesearch.audio.AudioRouterImpl$1@42695f60
12-10 09:24:38.874: I/MicrophoneInputStream(10153): mic_close
It seems it triggers an ACTION_WEB_SEARCH event, so I tried to add it to the filter. I tried it two ways:
Declaring the filter in the manifest:
<action android:name="android.intent.action.WEB_SEARCH" />Declaring the filter programmatically:
protected void onResume() { IntentFilter f = new IntentFilter(Intent.ACTION_WEB_SEARCH); registerReceiver(myReceiver, f); } private BroadcastReceiver myReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { Log.d("AA", "ON RECEIVE"); } };
None of this options work. As I said, this scenario isn’t of much importance, I can deal with it.
Wireless headset simple click
The Wireless headset simple click is the one opening the Voice Dialer and it’s the event I really need to capture. This is the log output:
12-10 10:41:22.014: E/bt-rfcomm(21800): PORT_DataInd, p_port:0x7507a7e8, p_data_co_callback is null
12-10 10:41:22.014: D/HeadsetStateMachine(21800): processVrEvent: state=1 mVoiceRecognitionStarted: false mWaitingforVoiceRecognition: false isInCall: false
12-10 10:41:22.014: I/ActivityManager(740): START u0 {act=android.intent.action.VOICE_COMMAND flg=0x10000000 cmp=com.google.android.googlequicksearchbox/com.google.android.voicesearch.handsfree.HandsFreeIntentActivity} from pid 21800
12-10 10:41:22.154: V/Avrcp(21800): New genId = 440, clearing = 1
12-10 10:41:22.154: D/HandsFreeIntentActivity(10153): #onStart(Intent { act=android.intent.action.VOICE_COMMAND flg=0x10800000 cmp=com.google.android.googlequicksearchbox/com.google.android.voicesearch.handsfree.HandsFreeIntentActivity })
12-10 10:41:22.154: D/HandsFreeIntentActivity(10153): Starting activity: Intent { act=android.intent.action.VOICE_COMMAND flg=0x10000000 cmp=com.google.android.googlequicksearchbox/com.google.android.voicesearch.handsfree.HandsFreeActivity }
12-10 10:41:22.154: I/ActivityManager(740): START u0 {act=android.intent.action.VOICE_COMMAND flg=0x10000000 cmp=com.google.android.googlequicksearchbox/com.google.android.voicesearch.handsfree.HandsFreeActivity} from pid 10153
12-10 10:41:22.204: D/OpenGLRenderer(10153): Enabling debug mode 0
12-10 10:41:22.214: W/IInputConnectionWrapper(18895): showStatusIcon on inactive InputConnection
12-10 10:41:22.244: I/ActivityManager(740): Displayed com.google.android.googlequicksearchbox/com.google.android.voicesearch.handsfree.HandsFreeActivity: +80ms (total +89ms)
12-10 10:41:22.374: I/AudioRouter(10153): ROUTE_NONE->ROUTE_BLUETOOTH_WANTED
12-10 10:41:22.384: I/MediaFocusControl(740): AudioFocus requestAudioFocus() from android.media.AudioManager@4267ad58com.google.android.voicesearch.audio.AudioRouterImpl$1@42695f60
12-10 10:41:22.384: V/Avrcp(21800): New genId = 441, clearing = 1
12-10 10:41:22.384: D/BluetoothManagerService(740): Message: 30
12-10 10:41:22.384: D/BluetoothHeadset(10153): Proxy object connected
12-10 10:41:22.384: I/BluetoothController(10153): BT device connected
12-10 10:41:22.394: I/AudioRouter(10153): BT required, starting SCO
12-10 10:41:22.394: I/BluetoothController(10153): Starting VR
12-10 10:41:22.394: D/BluetoothHeadset(10153): startVoiceRecognition()
12-10 10:41:22.394: D/HeadsetStateMachine(21800): Voice recognition started successfully
12-10 10:41:22.394: D/HeadsetStateMachine(21800): Initiating audio connection for Voice Recognition
12-10 10:41:22.394: W/bt-btm(21800): BTM Remote does not support 3-EDR eSCO
12-10 10:41:22.434: I/TextToSpeech(10153): Sucessfully bound to com.google.android.tts
12-10 10:41:22.454: I/TextToSpeech(10153): Connected to ComponentInfo{com.google.android.tts/com.google.android.tts.service.GoogleTTSService}
12-10 10:41:22.454: I/TextToSpeech(10153): Set up connection to ComponentInfo{com.google.android.tts/com.google.android.tts.service.GoogleTTSService}
12-10 10:41:22.484: D/dalvikvm(21966): GC_CONCURRENT freed 346K, 3% free 16647K/17064K, paused 2ms+3ms, total 13ms
12-10 10:41:22.764: D/audio_hw_primary(189): out_set_parameters: enter: usecase(1: low-latency-playback) kvpairs: routing=32
12-10 10:41:22.774: D/audio_hw_primary(189): select_devices: out_snd_device(11: bt-sco-headset) in_snd_device(0: )
12-10 10:41:24.874: I/EventLogService(1148): Aggregate from 1386666683008 (log), 1386666683008 (data)
12-10 10:41:24.994: I/ServiceDumpSys(1148): dumping service [account]
12-10 10:41:25.994: D/dalvikvm(10153): GC_CONCURRENT freed 1582K, 15% free 23868K/27920K, paused 5ms+7ms, total 60ms
12-10 10:41:26.014: I/VS.G3EngineManager(10153): create_rm: m=GRAMMAR,l=en-US
12-10 10:41:26.024: I/VS.G3EngineManager(10153): Brought up new g3 instance :/system/usr/srec/en-US/grammar.config for: en-USin: 4 ms
12-10 10:41:26.024: D/audio_hw_primary(189): out_set_parameters: enter: usecase(1: low-latency-playback) kvpairs: routing=32
12-10 10:41:26.034: D/audio_hw_primary(189): select_devices: out_snd_device(0: ) in_snd_device(25: bt-sco-mic)
12-10 10:41:26.034: D/(189): Failed to fetch the lookup information of the device 00000015
12-10 10:41:26.034: E/ACDB-LOADER(189): Error: ACDB AudProc vol returned = -19
This time it seems it’s sending an ACTION_VOICE_COMMAND, so I tried to add it to the filter. I tried it two ways:
Declaring the filter in the manifest:
<action android:name="android.intent.action.VOICE_COMMAND" />Declaring the filter programmatically:
protected void onResume() { IntentFilter f = new IntentFilter(Intent.ACTION_VOICE_COMMAND); registerReceiver(myReceiver, f); } private BroadcastReceiver myReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { Log.d("AA", "ON RECEIVE"); } };
Again, I’m not receiving these events, I don’t know why.