KeyEven接收

KeyEven接收
擷取按Key的動作

    public boolean dispatchKeyEvent(KeyEvent event) {
        switch (event.getKeyCode()){
        case KeyEvent.KEYCODE_MENU:
            break;
        case KeyEvent.KEYCODE_BACK:
            break;
        case KeyEvent.KEYCODE_VOLUME_UP:
            break;
        case KeyEvent.KEYCODE_VOLUME_DOWN:
            break;
        default:
            break;
        }
    }

// 目前"POWER"及"HOME"還不清楚要怎麼做
// Android OS限制?