android - 接管 Android 上的音量键

Question

我想接管音量调高和音量调低的过度输入。目前我的代码是:

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

    Log.v(TAG, event.toString());
    if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN){
        mLamp.moveBackward();

        return false;
    }
    else if(keyCode == KeyEvent.KEYCODE_VOLUME_UP){
        mLamp.moveForward();

        return false;
    }

    return true;
}
public boolean onKeyUp(int keyCode, KeyEvent event) {

    Log.v(TAG, event.toString());
    if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN){
        return false;
    }
    else if(keyCode == KeyEvent.KEYCODE_VOLUME_UP){
        return false;
    }

    return true;
}

这会触发 mLamp.moveBackward() 和 mLamp.moveForward() 函数，但它仍然会改变铃声的音量。我必须怎么做才能使铃声响度不变？

Answer 1

If you handled the event, return true. If you want to allow the event to be handled by the next receiver, return false.