关键长按监听器上的android

Question

我有一个列表视图，如果长按向上或向下，我需要连续滚动 如果短按上下键，我想要单列表导航。我尝试使用按键长按监听器，但每次单击向上或向下按钮时，它都会进入上键监听器或按键监听器

    @Override
public boolean onKeyLongPress(int keyCode, KeyEvent event) {
    // TODO Auto-generated method stub


    switch(keyCode)
    {
    case 23:
        Log.v("onkeylong_pressed","onkey_longpressed="+keyCode);
        return true;
    case 21:
        Log.v("onkeylong_pressed","onkey_longpressed="+keyCode);
        return true;
    case KeyEvent.KEYCODE_DPAD_DOWN:

        Log.v("onkeylong_pressed","onkey_longpressed="+keyCode);

        return true;
    }
    //return true;
    return super.onKeyLongPress(keyCode, event);
}


@Override
public boolean onKeyUp(int keyCode, KeyEvent event) {
    scroll.setSmoothScrollingEnabled(false);
    WheelView wheelView = getWheel(R.id.category_wheel);
    int currentItemIndex = wheelView.getCurrentItem();



    switch (keyCode) {

    case KeyEvent.KEYCODE_DPAD_DOWN:

             wheelView.setCurrentItem(currentItemIndex + 1);

        return true;

    case KeyEvent.KEYCODE_DPAD_UP:

        if (currentItemIndex == 0) {
            currentItemIndex = itemsList.size() - 1;
        }
        scroll.setScrollX(0);
        wheelView.setCurrentItem(currentItemIndex - 1);

        Index_Right=0;x=150;


        return true;

    case KeyEvent.KEYCODE_DPAD_RIGHT:


        return true;
    case KeyEvent.KEYCODE_DPAD_LEFT:


        return true;
    }   



    return super.onKeyUp(keyCode, event);
}

   @Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    // TODO Auto-generated method stub
    switch(keyCode){
    case KeyEvent.KEYCODE_DPAD_DOWN:
        long_Press=true;

        event.startTracking();


        return true;
    }
    return super.onKeyDown(keyCode, event);

}

任何人都可以帮帮我。谢谢。