Question

我正在开发一个Android应用程序，我希望它与headset按钮点击进行交互。我正在使用Android KitKat 4.4 Nexus 5进行测试。

我首先尝试使用简单的耳机（不是无线耳机）。收到的按钮事件为KEYCODE_HEADSETHOOK（79）。我创建了MEDIA_BUTTON receiver来处理其点击次数：

<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>

这是持有接收者的活动：

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(); } } }

仅当用户执行短暂的时，此代码才能与我的有线耳机配合使用。执行长按会打开Google Voice Search。我也希望获得长时间点击，但我不介意它是否可能。

之后我用bluetooth耳机测试了它。具体来说，我使用的是Moveteck蓝牙耳机BH119A（你可以看到这篇文章底部的图片）。此耳机只有一个按钮，如果我按下它，则会打开以下“activity”：

如果我的Activity被打开，我也想抓住这个点击事件。我该怎么做？我尝试将以下过滤器添加到我的接收器中，但它也不起作用：

<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" />

我也尝试在我的Activity中覆盖onKeyDown，但它没有被触发。

有人知道如何拦截这些事件？

这是我的蓝牙耳机：

**编辑**

按照Toaster的建议，我检查了整个日志，查找我的耳机触发的事件。

长按有线耳机

这是我长时间点击有线耳机时的日志（打开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

它似乎触发了ACTION_WEB_SEARCH事件，因此我尝试将其添加到过滤器中。我尝试了两种方式：

在清单中声明过滤器：

<action android:name="android.intent.action.WEB_SEARCH" />

以编程方式声明过滤器：

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"); } };

这些选项都不起作用。正如我所说，这种情况并不重要，我可以处理它。

无线耳机简单点击

无线耳机简单点击是打开语音拨号器和这是我真正需要捕获的事件。这是日志输出：

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

这次它似乎正在发送ACTION_VOICE_COMMAND，所以我尝试将其添加到过滤器中。我尝试了两种方式：

在清单中声明过滤器：

<action android:name="android.intent.action.VOICE_COMMAND" />

以编程方式声明过滤器：

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"); } };

同样，我没有收到这些事件，我不知道为什么。

Answer 1

我终于设法检测到了这些事件。我对这门课没有了解：

http://developer.android.com/reference/android/bluetooth/BluetoothHeadset.html

使用BluetoothAdapter，BluetoothHeadset和BluetoothDevice类我可以使用IntentFilter BluetoothHeadset.ACTION_AUDIO_STATE_CHANGED注册一个接收器，我能够检测到我的耳机上的点击。

这个问题是广播没有订购，所以我不能中止它。我可以在打开后立即关闭VoiceDialer活动，但这不是我想要的。

我会继续挣扎。

感谢@Toaster的努力：）

编辑：

用于检测事件的代码：

protected BluetoothAdapter mBluetoothAdapter;
protected BluetoothHeadset mBluetoothHeadset;
protected BluetoothDevice mConnectedHeadset;
protected AudioManager mAudioManager;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();

    if (mBluetoothAdapter != null)
    {

        mAudioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
        if (mAudioManager.isBluetoothScoAvailableOffCall())
        {
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB)
            {
                mBluetoothAdapter.getProfileProxy(this, mHeadsetProfileListener, BluetoothProfile.HEADSET);
            }
        }
    }
}

 protected BluetoothProfile.ServiceListener mHeadsetProfileListener = new BluetoothProfile.ServiceListener()
{

    /**
     * This method is never called, even when we closeProfileProxy on onPause.
     * When or will it ever be called???
     */
    @Override
    public void onServiceDisconnected(int profile)
    {
        mBluetoothHeadset.stopVoiceRecognition(mConnectedHeadset);
        unregisterReceiver(mHeadsetBroadcastReceiver);
        mBluetoothHeadset = null;
    }

    @Override
    public void onServiceConnected(int profile, BluetoothProfile proxy)
    {
        // mBluetoothHeadset is just a head set profile, 
        // it does not represent a head set device.
        mBluetoothHeadset = (BluetoothHeadset) proxy;

        // If a head set is connected before this application starts,
        // ACTION_CONNECTION_STATE_CHANGED will not be broadcast. 
        // So we need to check for already connected head set.
        List<BluetoothDevice> devices = mBluetoothHeadset.getConnectedDevices();
        if (devices.size() > 0)
        {
            // Only one head set can be connected at a time, 
            // so the connected head set is at index 0.
            mConnectedHeadset = devices.get(0);

            String log;

            // The audio should not yet be connected at this stage.
            // But just to make sure we check.
            if (mBluetoothHeadset.isAudioConnected(mConnectedHeadset))
            {
                log = "Profile listener audio already connected"; //$NON-NLS-1$     
            }
            else
            {
                // The if statement is just for debug. So far startVoiceRecognition always 
                // returns true here. What can we do if it returns false? Perhaps the only
                // sensible thing is to inform the user.
                // Well actually, it only returns true if a call to stopVoiceRecognition is
                // call somewhere after a call to startVoiceRecognition. Otherwise, if 
                // stopVoiceRecognition is never called, then when the application is restarted
                // startVoiceRecognition always returns false whenever it is called.
                if (mBluetoothHeadset.startVoiceRecognition(mConnectedHeadset))
                {
                    log = "Profile listener startVoiceRecognition returns true"; //$NON-NLS-1$
                }
                else
                {
                    log = "Profile listener startVoiceRecognition returns false"; //$NON-NLS-1$
                }   
            }

            Log.d(TAG, log); 
        }

        // During the active life time of the app, a user may turn on and off the head set.
        // So register for broadcast of connection states.
        registerReceiver(mHeadsetBroadcastReceiver, 
                        new IntentFilter(BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED));

        // Calling startVoiceRecognition does not result in immediate audio connection.
        // So register for broadcast of audio connection states. This broadcast will
        // only be sent if startVoiceRecognition returns true.
        IntentFilter f = new IntentFilter(BluetoothHeadset.ACTION_AUDIO_STATE_CHANGED);
        f.setPriority(Integer.MAX_VALUE);
        registerReceiver(mHeadsetBroadcastReceiver, f);
    }
};


protected BroadcastReceiver mHeadsetBroadcastReceiver = new BroadcastReceiver()
{

    @Override
    public void onReceive(Context context, Intent intent)
    {           
        String action = intent.getAction();
        int state;
        int previousState = intent.getIntExtra(BluetoothHeadset.EXTRA_PREVIOUS_STATE, BluetoothHeadset.STATE_DISCONNECTED);
        String log = ""; 

        if (action.equals(BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED))
        {
            state = intent.getIntExtra(BluetoothHeadset.EXTRA_STATE, BluetoothHeadset.STATE_DISCONNECTED);
            if (state == BluetoothHeadset.STATE_CONNECTED)
            {
                mConnectedHeadset = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);

                // Audio should not be connected yet but just to make sure.
                if (mBluetoothHeadset.isAudioConnected(mConnectedHeadset))
                {
                    log = "Headset connected audio already connected";
                }
                else
                {

                    // Calling startVoiceRecognition always returns false here, 
                    // that why a count down timer is implemented to call
                    // startVoiceRecognition in the onTick and onFinish.
                    if (mBluetoothHeadset.startVoiceRecognition(mConnectedHeadset))
                    {
                        log = "Headset connected startVoiceRecognition returns true"; $NON-NLS-1$
                    }
                    else
                    {
                        log = "Headset connected startVoiceRecognition returns false";
                    }
                }
            }
            else if (state == BluetoothHeadset.STATE_DISCONNECTED)
            {
                // Calling stopVoiceRecognition always returns false here
                // as it should since the headset is no longer connected.
                mConnectedHeadset = null;
            }
        }
        else // audio
        {
            state = intent.getIntExtra(BluetoothHeadset.EXTRA_STATE, BluetoothHeadset.STATE_AUDIO_DISCONNECTED);

            mBluetoothHeadset.stopVoiceRecognition(mConnectedHeadset);

            if (state == BluetoothHeadset.STATE_AUDIO_CONNECTED)
            {
                log = "Head set audio connected, cancel countdown timer";  
            }
            else if (state == BluetoothHeadset.STATE_AUDIO_DISCONNECTED)
            {
                // The headset audio is disconnected, but calling
                // stopVoiceRecognition always returns true here.
                boolean returnValue = mBluetoothHeadset.stopVoiceRecognition(mConnectedHeadset);
                log = "Audio disconnected stopVoiceRecognition return " + returnValue; 
            }
        }   

        log += "\nAction = " + action + "\nState = " + state 
                + " previous state = " + previousState; 
        Log.d(TAG, log);

    }
};

就像我说的那样，我可以检测到这些事件，但我无法在广播中进行。

Answer 2

对于Voice Dialer操作，请将以下内容添加到清单中：

<action android:name="android.intent.action.VOICE_COMMAND" />
<category android:name="android.intent.category.DEFAULT" />

从调试日志中推断，ACTION_VOICE_COMMAND是触发操作，但如果没有CATEGORY_DEFAULT，则不会考虑您的应用。（我用自己的蓝牙耳机进行了测试，它对我有用！）

Answer 3

由于您有一种接收广播的方法，因此您不能尝试打印在长按耳机时收到的意图，这样您就可以知道手机在这种情况下接收的是什么事件并处理它？</ p>

@Override
    public void onReceive(Context context, Intent intent) {

        Log.d("SA", "ON RECEIVE" + intent.getAction()); // Print the received event

        ...

        abortBroadcast();
    }

在Android上处理蓝牙耳机点击（ACTION_VOICE_COMMAND和ACTION_WEB_SEARCH）

3 个答案: