SlidingDrawer防止onTouchEvent

Question

我有一个大型的自定义ImageView，其中的区域被定义为热点。当用户触摸图像上的热点时，我希望向他们提供一个适合所选热点的选项列表。为了最大化图像可用的空间，我在SlidingDrawer中展示了这些选项。

一旦我碰到热点，滑动抽屉覆盖的区域就会停止产生OnTouchEvent回调，即使SlidingDrawer仍然关闭。一旦我手动打开和关闭滑动抽屉，我可以得到一个单一的回调。然而，在滑动抽屉手柄两边的图像顶部的区域(这永远不会被SlidingDrawer覆盖)继续产生回调。

我尝试了以下几点，但都没有成功：

• programmatically关闭OnTouchEvent callback
• Setting中的抽屉一个自定义IOnTouchListener在自定义ImageView父级和SlidingDrawer父级
• 设置RequestDisallowInterceptTouchEvent(真)上ImageView和SlidingDrawer
• 覆盖活动

中

如果我以编程方式将ViewState的SlidingDrawer设置为"gone"，那么在关闭SlidingDrawer时，所有的热点都会生成OnTouchEvent回调。

下面是布局描述：

<company.views.CustomDetailView     
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:xsns="http://schemas.android.com/apk/res/com.xactware.xactscopedroid" 
    android:id="@+id/ref_search_detail_view"
    style="@style/BaseFullLayout.Vertical">

<company.views.CustomImageView
    android:id="@+id/full_image"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="center_horizontal"  />

<SlidingDrawer
    android:id="@+id/drawer"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:handle="@+id/handle"
    android:content="@+id/content"
    android:focusableInTouchMode="false">   

    <TextView
        android:id="@id/handle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="@dimen/font_xlarge"
        android:textColor="@color/dark_gray"
        android:textStyle="bold"
        android:layout_marginTop="10dp"
        android:layout_marginBottom="10dp"
        android:layout_marginLeft="10dp"
        android:background="@drawable/shape_data_background"
        android:focusableInTouchMode="false"    />
    <ListView
        android:id="@id/content"
        style="@style/ScopeList.ListView" />
</SlidingDrawer>

​

下面是用于设置映像、选项列表和OnHotSpotSelected回调的代码。

private void LoadImage(ParentTopic pTopic)
        {
            if (_imageView == null)
            {
                _imageView = FindViewById<RefSearchImageView>(Resource.Id.full_image);
            }

        string imgPath = pTopic.FullImage;
        if (imgPath != null)
        {
            var stream = Context.Assets.Open(System.IO.Path.Combine("en-USrefSearch", pTopic.FullImage));
            Bitmap bmp = BitmapFactory.DecodeStream(stream);
            _imageView.SetImageBitmap(bmp);
            _imageView.PTopic = pTopic;
            _imageView.OnHotSpotSelected = new HotSpotSelectedDelegate(OnHotSpotSelected);
        }


    }

    private void LoadList()
    {

        if (_parentHeaderLabel == null)
        {
            _parentHeaderLabel = FindViewById<TextView>(Resource.Id.handle);
        }

        if (Resources.Configuration.Orientation == Android.Content.Res.Orientation.Landscape)
        {
            _slidingDrawer = FindViewById<SlidingDrawer>(Resource.Id.drawer);
            //_slidingDrawer.Visibility = ViewStates.Gone;
        }
        _parentHeaderLabel.Text = null;

        if (_listView == null)
        {
            _listView = FindViewById<ListView>(Resource.Id.content);
        }
        if (_currentHeaderList != null)
        {
            _currentHeaderList.Clear();
        }

        LayoutInflater inflater = (LayoutInflater)Context.GetSystemService(Context.LayoutInflaterService);
        View emptyView = inflater.Inflate(Resource.Layout.RefSearchDetailEmptyList, _listView, false);
        _listView.EmptyView = emptyView;

        var ia = Context as ItemsActivity;
        _listView.OnItemClickListener = new OnRSHeaderClickListener(ia, _currentHeaderList);
    }

    public void OnHotSpotSelected(string code)
    {
        ItemsActivity ia = Context as ItemsActivity;
        RSParentHeader parentHeader = ia.Data.GetRSParentHeader(code);
        _parentHeaderLabel.Text = parentHeader.Desc;

        _currentHeaderList = ia.Data.GetRSHeaders(parentHeader.ID);
        _listView.Adapter = new RSHeaderListAdapter(Context, Resource.Layout.RSHeaderListItem, Resource.Id.rsheader_desc, _currentHeaderList);
        _imageView.Invalidate();
        _imageView.RequestFocus();

    }

Answer 1

我仍然不知道为什么，但ListView，这是我的SlidingDrawer的内容，继续消费TouchEvents，即使抽屉关闭。我创建了一个定制的ListView，并重写了OnTouchEvent()来告诉它不要这样做。

public override bool OnTouchEvent (MotionEvent e){
    bool consumed = base.OnTouchEvent (e);
    SlidingDrawer drawer = (SlidingDrawer)this.Parent;
    if (!drawer.IsOpened)
    {
        return false;
    }
    return consumed;
}