/**

* 监听音量加减

*/

@Override

public boolean onKeyDown(int keyCode, KeyEvent event) {

switch (keyCode) {

case KeyEvent.KEYCODE_VOLUME_DOWN:

Toast.makeText(MainActivity.this, "减", Toast.LENGTH_SHORT).show();

break;

case KeyEvent.KEYCODE_VOLUME_UP:

Toast.makeText(MainActivity.this, "加", Toast.LENGTH_SHORT).show();

return true;

case KeyEvent.KEYCODE_VOLUME_MUTE:

return true;

}

return super.onKeyDown(keyCode, event);

}