CODEWITHSUNDEEP
android
user1782267
user1782267

Reputation: 313

How to disable the physical volume buttons on Android?

I am developing an Android application, and my apps will play out an alarm once it is started, but I would like to disable the external volume buttons so that when the phone is alarming, user is not able to turn down the alarm volume. I have tested on my phone with Android version 2.3.5, but it is not working. Below is my coding. Hope someone can help me... Thanks.

@Override
public boolean onKeyDown(int keyCode, KeyEvent event){

    if (keyCode == KeyEvent.KEYCODE_VOLUME_UP){
        Toast.makeText(this, "Volume Up", Toast.LENGTH_LONG).show();
        return true;
    }

    if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN){
        Toast.makeText(this, "Volume Down", Toast.LENGTH_LONG).show();
        return true;
    }

    return super.onKeyDown(keyCode, event);
}

Upvotes: 5

Views: 11218

Answers (3)

Ankush Shrivastava
Ankush Shrivastava

Reputation: 574

just return true to disable volume operations. and now you can do other operations from onVolumeDown() and onVolumeUp() functions.

 @Override
   public boolean onKeyDown(int keyCode, KeyEvent event) {
       if(keyCode==KeyEvent.KEYCODE_VOLUME_DOWN)
          onVolumeDown();
    if(keyCode==KeyEvent.KEYCODE_VOLUME_UP)
        onVolumeUp();

    return true;
    //return super.onKeyDown(keyCode, event);
}

Upvotes: 0

Marek R
Marek R

Reputation: 38092

The best way is to play alarm sound on one audio stream (AudioManager.STREAM_ALARM) and make volume button to be associated with another audio stream (setVolumeControlStream(AudioManager.STREAM_MUSIC);). http://developer.android.com/training/managing-audio/volume-playback.html#HardwareVolumeKeys

Upvotes: 0

Marcin Orlowski
Marcin Orlowski

Reputation: 75644

Try overriding dispatchKeyEvent(KeyEvent event):

@Override
public boolean dispatchKeyEvent(KeyEvent event) {
    boolean result;
     switch( event.getKeyCode() ) {
        case KeyEvent.KEYCODE_VOLUME_UP:
        case KeyEvent.KEYCODE_VOLUME_DOWN:
            result = true;
            break;

         default:
            result= super.dispatchKeyEvent(event);
            break;
     }

     return result;
}

also see this article.

Upvotes: 12

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