Need to shut off the sound MediaRecorder plays when the state changes

问题

I have tried the changes found at the link below but with no avail.

How to shut off the sound MediaRecorder plays when the state changes

I tried both

AudioManager audioManager = (AudioManager) getApplicationContext().getSystemService(Context.AUDIO_SERVICE);
audioManager.setStreamMute(AudioManager.STREAM_SYSTEM, false);
audioManager.setStreamMute(AudioManager.STREAM_MUSIC,false);

and

// disable sound for recording.   
// disable sound when recording.
((AudioManager)activity.getApplicationContext().getSystemService(Context.AUDIO_SERVICE)).setStreamMute(AudioManager.STREAM_ALARM,true);
((AudioManager)activity.getApplicationContext().getSystemService(Context.AUDIO_SERVICE)).setStreamMute(AudioManager.STREAM_DTMF,true);
((AudioManager)activity.getApplicationContext().getSystemService(Context.AUDIO_SERVICE)).setStreamMute(AudioManager.STREAM_MUSIC,true);
((AudioManager)activity.getApplicationContext().getSystemService(Context.AUDIO_SERVICE)).setStreamMute(AudioManager.STREAM_RING,true);
((AudioManager)activity.getApplicationContext().getSystemService(Context.AUDIO_SERVICE)).setStreamMute(AudioManager.STREAM_SYSTEM,true);
((AudioManager)activity.getApplicationContext().getSystemService(Context.AUDIO_SERVICE)).setStreamMute(AudioManager.STREAM_VOICE_CALL,true);

But I still get the sound when I start the media recorder. I have tried putting this code both at the start of the app and directly before the:

mediaRecorder.start();

Are there any other suggestions?

回答1:

SetStreamMute works only for SYSTEM and MUSIC. For all the other you should use SetStreamVolume.

Try the following code:

AudioManager audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);

    audioManager.setStreamMute(AudioManager.STREAM_SYSTEM, true);
    audioManager.setStreamMute(AudioManager.STREAM_MUSIC,true);
    audioManager.setStreamVolume(AudioManager.STREAM_ALARM, 0, 0);
    audioManager.setStreamVolume(AudioManager.STREAM_DTMF, 0, 0);
    audioManager.setStreamVolume(AudioManager.STREAM_NOTIFICATION, 0, 0);
    audioManager.setStreamVolume(AudioManager.STREAM_RING, 0, 0);

For sanity check:

Log.d(TAG, String.format("%d,  %d, %d, %d, %d, %d, %d",
            audioManager.getStreamVolume(AudioManager.STREAM_SYSTEM),
            audioManager.getStreamVolume(AudioManager.STREAM_MUSIC),
            audioManager.getStreamVolume(AudioManager.STREAM_ALARM),
            audioManager.getStreamVolume(AudioManager.STREAM_DTMF),
            audioManager.getStreamVolume(AudioManager.STREAM_NOTIFICATION),
            audioManager.getStreamVolume(AudioManager.STREAM_RING)
            ));

The result should give: 0, 0, 0, 0, 0, 0

Keep in mind that the games with volume (exclude setStreamMute) won't reset the previous values after activity dies, so you probably want to store them to restore in onDestroy() or earlier.

来源：https://stackoverflow.com/questions/14369445/need-to-shut-off-the-sound-mediarecorder-plays-when-the-state-changes

标签

android

cordova

audio

mute