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

user_456425 0
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My Android application uses MediaRecorder on a SurfaceHolder to show a live preview of what the camera is capturing. Every time the user presses the REC button on the app, the app starts to record. Every time the state of the MediaRecorder switches to/from 'start', Android automatically (?) fires off a beep. This beep sounds different from phone to phone, which makes me think that this beep is natively attached to the state change of MediaRecorder. The beep is not played if the volume of the phone is set to silent.

I google it and did some research but I couldn't find a way to turn this beep off. Is it possible? If so, how?

The app was tested on: Nexus One 2.3.4, Desire HD 2.3.3

record media audio android
5 Answers

Add this code before the start:

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

audioManager.setStreamMute(AudioManager.STREAM_SYSTEM, true);
audioManager.setStreamMute(AudioManager.STREAM_MUSIC,true);

And add this code after the stop:

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

audioManager.setStreamMute(AudioManager.STREAM_SYSTEM, false);
audioManager.setStreamMute(AudioManager.STREAM_MUSIC,false);

There are countries/firmwares that use STREAM_SYSTEM and others using STREAM_MUSIC. There are also countries where this is illegal but use a different channel.

user_11874210
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