Why I am not able to control Media volume when the alert dialog is shown in Android?

Question

I am controlling media volume programmatically from my app. I am setting alert dialog when the media volume is below certain range. When this alert is displayed at this point if I try to adjust the volume controller buttons the ringer volume will get adjusted not media volume. Why is this happening?

I am using these lines to control media volume..

case KeyEvent.KEYCODE_VOLUME_DOWN:

             audio.adjustStreamVolume(AudioManager.STREAM_MUSIC,
                    AudioManager.ADJUST_LOWER, AudioManager.FLAG_SHOW_UI);
             return true;
case KeyEvent.KEYCODE_VOLUME_UP:

             audio.adjustStreamVolume(AudioManager.STREAM_MUSIC,
                    AudioManager.ADJUST_RAISE, AudioManager.FLAG_SHOW_UI);

             return true;

Once the alert dialog is dismissed I am able to control the media volume. I am facing this issue only in phone not in tablet.

Answer 1

您可能需要调用Dialog.setVolumeControlStream 。

Answer 2

How about just letting the phone control the volume on its own? That's pretty much how the designers thought developer-managing-audio-volume . Saves you a lot of trouble. All you have to do is add this line to the onCreate() of each Activity:

setVolumeControlStream(AudioManager.STREAM_MUSIC);

If you want to intercept the volume and add a warning if it goes past a thresh-hold, go ahead. It should still work.