is it possible to mute a call while recording the sound in android

Question

I want to build a app where I want to modulate the sound in a call.I have written a code that record the sound nd play it in different pitch.Now I want this feature while calling.I want to mute the call record the sound then play it with diff pitch.How to mute the call but still record the audio.

Answer 1

This answer works to mute your microphone during a call:

Boolean isMuted = false;

Then in your event, say an onClick

AudioManager audioManager = (AudioManager) getContext().getSystemService(Context.AUDIO_SERVICE);
if(!isMuted){

   if((audioManager.getMode()== AudioManager.MODE_IN_CALL)||(audioManager.getMode()== AudioManager.MODE_IN_COMMUNICATION)){
   audioManager.setMicrophoneMute(true);
  }
  isMuted = true;

 }else{

  if((audioManager.getMode()== AudioManager.MODE_IN_CALL)||(audioManager.getMode()== AudioManager.MODE_IN_COMMUNICATION)){
    audioManager.setMicrophoneMute(false);
    }
  isMuted = false;
 }

Remember to enable permissions in your manifest:

<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />

Answer 2

Step 1. set permission in manifest

<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />

Step 2. reverse microphone status

AudioManager audioManager = 
     (AudioManager) getBaseContext().getSystemService(Context.AUDIO_SERVICE);
if (audioManager!=null) {
     audioManager.setMicrophoneMute(!audioManager.isMicrophoneMute());
}

Answer 3

I couldn't make AudioManager.setMicrophoneMute(boolean) work on my Honor device, but I found another way to do this. I needed this funcionality in my custom dial app, so I already had custom InCallService, intercepting all calls. This class has method setMuted(boolean state) which works perfectly.