[Android]插入耳机时只有耳机声音

Question

当耳机插入android时，我只想从耳机发出声音。 （按警报音量）

        AudioManager audioManager = (AudioManager)context.getSystemService(Context.AUDIO_SERVICE);
        audioManager.setStreamVolume(AudioManager.STREAM_ALARM,alarmVolume,0);

        mediaPlayer.setAudioStreamType(AudioManager.STREAM_ALARM);
        mediaPlayer.prepare();
        mediaPlayer.setLooping(false);

        mediaPlayer.start();

Answer 1

为此你需要听有线耳机状态。

 private void registerWiredHeadsetIntentBroadcast() {
    IntentFilter filter = new IntentFilter("android.intent.action.HEADSET_PLUG");
    this.wiredHeadsetReceiver = new BroadcastReceiver() {
        public void onReceive(Context context, Intent intent) {
            int state = intent.getIntExtra("state", 0);
            int microphone = intent.getIntExtra("microphone", 0);
            boolean hasWiredHeadset = state == 1;
            isWiredHeadsetPlugged=hasWiredHeadset;
                switch (state) {
                    case 0:
                        //unplugged
                        audioManager.setWiredHeadsetOn(false);
                        audioManager.setSpeakerphoneOn(true);
                        break;
                    case 1:
                        //plugged
                        audioManager.setWiredHeadsetOn(true);
                        break;
                    default:
                }
        }
    };
    this.apprtcContext.registerReceiver(this.wiredHeadsetReceiver, filter);
}

将AudioStreamType分配给音频管理器，你很高兴。