问题描述
我有两个列表视图
。有没有什么办法,当我滚动列表中的任何一个同步列表视图
的位置。林实施的 AbsListView.OnScrollListener
,注册到的ListView
。当的ListView
滚动时的 onScroll()
方法 OnScrollListener
将被触发,然后我叫'smoothScrollToPosition()。但它doent正常工作。有人可以提供我任何code例子吗?
I have two ListViews
. Is there any way to synchronize the position of ListViews
when I scroll any one of the Lists. Im implementing an AbsListView.OnScrollListener
, registering to the ListView
. When the ListView
is scrolled, the onScroll()
method of OnScrollListener
will be triggered, then i call `smoothScrollToPosition()'. But it doent work properly. Can someone provide me any code example for this?
推荐答案
下面是一个工作code什么nininho是建议样品
Here is a working code sample of what nininho is suggesting
MainActivity
MainActivity
public class MainActivity extends Activity {
public static String[] Cheeses = new String[] { "Abbaye de Belloc", "Abbaye du Mont des Cats",
"Abertam", "Abondance", "Ackawi", "Acorn", "Adelost", "Affidelice au Chablis",
"Afuega'l Pitu", "Airag", "Airedale", "Aisy Cendre", "Allgauer Emmentaler", "Alverca",
"Ambert", "American Cheese", };
ListView list1;
ListView list2;
boolean isLeftListEnabled = true;
boolean isRightListEnabled = true;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ListAdapter adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,
Cheeses);
list1 = (ListView) findViewById(R.id.list1);
list1.setAdapter(adapter);
list2 = (ListView) findViewById(R.id.list2);
list2.setAdapter(adapter);
// IF YOU DO NOT OVERRIDE THIS
// ONLY THE ONE THAT IS TOUCHED WILL SCROLL OVER
list1.setOverScrollMode(ListView.OVER_SCROLL_NEVER);
list2.setOverScrollMode(ListView.OVER_SCROLL_NEVER);
list1.setOnScrollListener(new OnScrollListener() {
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
// onScroll will be called and there will be an infinite loop.
// That's why i set a boolean value
if (scrollState == SCROLL_STATE_TOUCH_SCROLL) {
isRightListEnabled = false;
} else if (scrollState == SCROLL_STATE_IDLE) {
isRightListEnabled = true;
}
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount,
int totalItemCount) {
View c = view.getChildAt(0);
if (c != null && isLeftListEnabled) {
list2.setSelectionFromTop(firstVisibleItem, c.getTop());
}
}
});
list2.setOnScrollListener(new OnScrollListener() {
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
if (scrollState == SCROLL_STATE_TOUCH_SCROLL) {
isLeftListEnabled = false;
} else if (scrollState == SCROLL_STATE_IDLE) {
isLeftListEnabled = true;
}
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount,
int totalItemCount) {
View c = view.getChildAt(0);
if (c != null && isRightListEnabled) {
list1.setSelectionFromTop(firstVisibleItem, c.getTop());
}
}
});
}
}
在XML
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:splitMotionEvents="true">
<ListView android:id="@+id/list1"
android:layout_width="0dip"
android:layout_height="match_parent"
android:layout_weight="1" />
<ListView android:id="@+id/list2"
android:layout_width="0dip"
android:layout_height="match_parent"
android:layout_weight="1" />
</LinearLayout>
这篇关于如何syncronisize 2列表视图位置的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!