[英]ListView disable vertical scrolling of header view
I have a ListView
with com.google.android.gms.maps.MapView
in its header. 我的标题中有一个带有com.google.android.gms.maps.MapView
的ListView
。 When I'm scrolling the list I want the MapView
to be hidden and it works just fine. 当我滚动列表时,我希望隐藏MapView
,它可以正常工作。 But, when I'm scrolling the header from up to down, or down up I don't want ListView
to perform scrolling - I want it to allow MapView
to perform its zoom/scroll operations. 但是,当我从上到下滚动标题或向下滚动时我不希望ListView
执行滚动 - 我希望它允许MapView
执行其缩放/滚动操作。
I know that it's bad idea to use ListView
/ MapView
together, but I need to find a solution. 我知道一起使用ListView
/ MapView
是个坏主意 ,但我需要找到一个解决方案。 I thought about setting the OnTouchListener
on the ListView
instance and dispatching its events to the MapView
when needed but it looks like a not very straightforward solution. 我考虑过在ListView
实例上设置OnTouchListener
并在需要时将其事件调度到MapView
,但它看起来不是一个非常简单的解决方案。
In the end I've solved it by extending the ListView
class: 最后我通过扩展ListView
类来解决它:
public class SingleScrollableHeaderListView extends ListView {
private View mHeaderView;
public SingleScrollableHeaderListView(Context context) {
super(context);
}
public SingleScrollableHeaderListView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public SingleScrollableHeaderListView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
if (mHeaderView != null) return mHeaderView.onTouchEvent(ev);
return super.onInterceptTouchEvent(ev);
}
@Override
public void addHeaderView(View v, Object data, boolean isSelectable) {
if (mHeaderView != null) removeHeaderView(mHeaderView);
mHeaderView = v;
super.addHeaderView(v, data, isSelectable);
}
}
The significant part is the onInterceptTouchEvent()
method - here I'm passing the MotionEvent
instance to the header view if it exists, otherwise I let the ListView
to deal with the motion event. 该显著的部分是onInterceptTouchEvent()
方法-在这里我传递的MotionEvent
实例的标题视图,如果它存在,否则我让ListView
来处理运动事件。
尝试在MapView上的OnTouch中调用requestDisallowInterceptTouchEvent(true)到listview
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