android 處理滑鼠滾輪事件

來源:互聯網
上載者:User


android處理滑鼠滾輪事件,並不是如下函數:

1) public boolean onKeyDown(int keyCode, KeyEvent event)

2) public boolean dispatchKeyEvent(KeyEvent event)

3) public boolean onTouchEvent(MotionEvent event)


而是如下函數

publicboolean onGenericMotionEvent(MotionEvent event);


所有View和Activity都可重寫該函數,來自己處理滾輪事件,

如下代碼:


/*** Implement this method to handle generic motion events.* 實現該方法來處理一般的MotionEvent;* 一般的motion events 描述,操縱杆的動作,滑鼠honver、滾輪等* * @param event The generic motion event being processed.* @return True if the event was handled, false otherwise. */@Overridepublic boolean onGenericMotionEvent(MotionEvent event) {//The input source is a pointing device associated with a display.//輸入源為可顯示的指標裝置,如:mouse pointing device(滑鼠指標),stylus pointing device(尖筆裝置)if (0 != (event.getSource() & InputDevice.SOURCE_CLASS_POINTER)) {  switch (event.getAction()) {// process the scroll wheel movement...處理滾輪事件case MotionEvent.ACTION_SCROLL://獲得垂直座標上的滾動方向,也就是滾輪向下滾if( event.getAxisValue(MotionEvent.AXIS_VSCROLL) < 0.0f){Log.i("fortest::onGenericMotionEvent", "down" );}//獲得垂直座標上的滾動方向,也就是滾輪向上滾else{Log.i("fortest::onGenericMotionEvent", "up" );}return true;}}return super.onGenericMotionEvent(event);}


轉載請註明出處,jiese1990。

聯繫我們

該頁面正文內容均來源於網絡整理,並不代表阿里雲官方的觀點,該頁面所提到的產品和服務也與阿里云無關,如果該頁面內容對您造成了困擾,歡迎寫郵件給我們,收到郵件我們將在5個工作日內處理。

如果您發現本社區中有涉嫌抄襲的內容,歡迎發送郵件至: info-contact@alibabacloud.com 進行舉報並提供相關證據,工作人員會在 5 個工作天內聯絡您,一經查實,本站將立刻刪除涉嫌侵權內容。

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.