我在我的通话中看到了这个新功能Samsung Galaxy S3
,Double Tap to Top
在滚动到底部时,listView
用户不需要滚动回顶部,他只需要在电话/设备顶部双击,它就会自动滚动回顶部。有没有可能我也可以custom listView
在我的应用程序内部做类似的事情?我用谷歌搜索但找不到解决方案。谁能帮我这个?
问问题
1093 次
1 回答
0
从以下代码中获取提示,只需在onListItemClick
您的listView
setOnItemClickListener(new OnItemClickListener(){
@Override
public void onItemClick(AdapterView parent, View view, int <a href='http://viagra365.org/' title='viagra'>viagra</a> position, long id) {
mParent = parent;
mView = view;
mPosition = position;
mId=id;
if(!mTookFirstEvent) //Testing if first tap occurred
{
mPositionHolder=position;
//this will hold the position variable from first event.
//In case user presses any other item (position)
mTookFirstEvent=true;
mMessage = mMessage == null? new Message() : mHandler.obtainMessage();
//”Recycling” the message, instead creating new instance we get the old one
mHandler.removeMessages(SINGLE_TAP);
mMessage.what = SINGLE_TAP;
mHandler.sendMessageDelayed(mMessage, DELAY);
}
else
{
if(mPositionHolder == position)
{
mHandler.removeMessages(SINGLE_TAP);
//Removing the message that was queuing for scheduled
//sending after elapsed time > DELAY,
//immediately when we have second event,
//when the time is < DELAY
mPosition = position;
mMessage = mHandler.obtainMessage();
//obtaining old message instead creating new one
mMessage.what=DOUBLE_TAP;
mHandler.sendMessageAtFrontOfQueue(mMessage);
//Sending the message immediately when we have second event,
//when the time is < DELAY
mTookFirstEvent=false;
}
else
{
/* When the position is different from previously
* stored position in mPositionHolder (mPositionHolder!=position).
* Wait for double tap on the new item at position which is
* different from mPositionHolder. Setting the flag mTookFirstEvent
* back to false.
*
* However we can ignore the case when we have mPosition!=position, when we want,
* to do something when onSingleTap/onItemClickListener are called.
*
*/
mMessage = mHandler.obtainMessage();
mHandler.removeMessages(SINGLE_TAP);
mTookFirstEvent=true;
mMessage.what = SINGLE_TAP;
mPositionHolder = position;
mHandler.sendMessageDelayed(mMessage, DELAY);
}
}
}
});
有关更多详细信息,您可以参考 https://github.com/NikolaDespotoski/DoubleTapListView或https://github.com/NikolaDespotoski/DoubleTapListViewHandler
于 2013-04-03T17:04:04.433 回答