java - 有没有办法在 Android 设备上同时使用两个外部音量键来获得第三个独特的输出？

Question

我正在创建一个计数应用程序，它使用外部音量键进行向上和向下计数。但我想使用同时按下的两个键来获得第三个独特的输出，例如作为重置按钮。有办法做到这一点吗？

谢谢

Answer 1

在您的 Activity 中。尝试以下代码来调高音量 + 调低音量。您可以减少 PRESS_INTERVAL 以获得像同时按下两个按钮一样的效果。希望这有帮助!

private static final int PRESS_INTERVAL = 500;
private long mUpKeyEventTime = 0;
public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (KeyEvent.KEYCODE_VOLUME_DOWN== event.getKeyCode()) {            
            if ((event.getEventTime() - mUpKeyEventTime) < PRESS_INTERVAL) {
                // This is to check if Volume UP key and Volume DOWN key are pressed at the same time.
                // Do the Task. Here You can add logic to do whatever you like
            }
            return true;
        } else if (keyCode == KeyEvent.KEYCODE_VOLUME_UP) {
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }

    public boolean onKeyUp(int keyCode, KeyEvent event) {
        if(KeyEvent.KEYCODE_VOLUME_UP == keyCode){
            mUpKeyEventTime = event.getEventTime();
        }
        return super.onKeyUp(keyCode, event);
    }