在对话框中按下音量减小时隐藏UI

Question

有没有办法在按下volume_up / volume_down键时隐藏音量ui。我知道可以通过一个活动来完成它，当它显示出对话框时，它似乎无法工作。

有解决方案吗？

Answer 1

这适用于Dialog类：

AudioManager man = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
dialog.setOnKeyListener(new OnKeyListener() {
    @Override
    public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) {
        switch (event.getKeyCode()) {
            case KeyEvent.KEYCODE_VOLUME_UP:
                man.adjustStreamVolume(AudioManager.STREAM_MUSIC,
                    AudioManager.ADJUST_RAISE,
                    AudioManager.FLAG_REMOVE_SOUND_AND_VIBRATE);
                return true;
            case KeyEvent.KEYCODE_VOLUME_DOWN:
                man.adjustStreamVolume(AudioManager.STREAM_MUSIC,
                    AudioManager.ADJUST_LOWER,
                    AudioManager.FLAG_REMOVE_SOUND_AND_VIBRATE);
                return true;
           default:
                return super.onKeyDown(keyCode, event);
        }
    }
});

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Answer 2

尝试此代码，它应禁用卷

的Toast消息

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if ((keyCode == KeyEvent.KEYCODE_VOLUME_DOWN)){
        //Do something to hide the view
        AudioManager manager = (AudioManager)this.getSystemService(Context.AUDIO_SERVICE);
        manager.adjustVolume(AudioManager.ADJUST_LOWER, 0);
    }
    if ((keyCode == KeyEvent.KEYCODE_VOLUME_UP)){
        //Do something to hide the view
        AudioManager manager = (AudioManager)this.getSystemService(Context.AUDIO_SERVICE);
        manager.adjustVolume(AudioManager.ADJUST_RAISE, 0);
    }
    return true;
}