我有一个 Horizontal RecyclerView:每个项目都有一个使用 Facebook Fresco 图像库加载到其中的图像。然而,虽然正确的图像最初是在屏幕上滚动一点时加载的,但当 RecyclerView 进一步滚动时它会消失。
此外,还有来回滚动将错误图像放入错误项目的问题(我认为这是回收视图持有者的问题)。也就是说,您可以在下面的屏幕截图中看到覆盖项目的文本始终显示在正确的项目上,因此这个回收问题是图像独有的。
我可以确认我每次都向 SimpleDraweeView 传递正确的 URL。
以下是一些屏幕和随附的日志:
屏幕截图 1:显示从右侧输入的正确图像。
将其滚动到屏幕上并成功加载图像时记录:
AbstractDraweeController: controller cbb6b5b 5: onTouchEvent MotionEvent { action=ACTION_DOWN, actionButton=0, id[0]=0, x[0]=32.860107, y[0]=198.16406, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=464189, downTime=464189, deviceId=0, source=0x1002 }
AbstractDraweeController: controller c077610 8: setHierarchy: com.facebook.drawee.generic.GenericDraweeHierarchy@d36ab12
AbstractDraweeController: controller 87baf9c null -> 9: initialize
AbstractDraweeController: controller c077610 8: setHierarchy: null
AbstractDraweeController: controller 87baf9c 9: setHierarchy: com.facebook.drawee.generic.GenericDraweeHierarchy@d36ab12
AbstractDraweeController: controller 87baf9c 9: onAttach: request needs submit
PipelineDraweeController: controller 87baf9c: getDataSource
AbstractDraweeController: controller 87baf9c 9: submitRequest: dataSource: ad37da5
BufferedDiskCache: Did not find image for http://i.imgur.com/OVwFM9ub.jpg in staging area
BufferedDiskCache: Disk cache read for http://i.imgur.com/OVwFM9ub.jpg
BufferedDiskCache: Found entry in disk cache for http://i.imgur.com/OVwFM9ub.jpg
NativeMemoryChunkPool: Used = (7, 188416); Free = (0, 0)
NativeMemoryChunkPool: get (alloc) (object, size) = (ef2f57a, 16384)
GenericByteArrayPool: Used = (1, 16384); Free = (0, 0)
GenericByteArrayPool: get (reuse) (object, size) = (cf34727, 16384)
GenericByteArrayPool: release (reuse) (object, size) = (cf34727, 16384)
GenericByteArrayPool: Used = (0, 0); Free = (1, 16384)
BufferedDiskCache: Successful read from disk cache for http://i.imgur.com/OVwFM9ub.jpg
TiffUtil: Unsupported orientation
BitmapPool: Used = (7, 2831360); Free = (0, 0)
BitmapPool: get (alloc) (object, size) = (8622988, 102400)
AbstractDraweeController: controller 87baf9c 9: set_final_result @ onNewResult: image: CloseableReference 1a34f21
屏幕截图 2:显示从右向左进一步滚动后的 RecyclerView。这表明之前加载到 ViewHolder 中的图像现在已经消失了。
在屏幕截图 1 和 2 之间生成以下日志:
AbstractDraweeController: controller cbb6b5b 5: onTouchEvent MotionEvent { action=ACTION_DOWN, actionButton=0, id[0]=0, x[0]=103.65283, y[0]=144.14063, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=793409, downTime=793409, deviceId=0, source=0x1002 }
AbstractDraweeController: controller 87baf9c 9: onDetach
AbstractDraweeController: controller e14aa9d 2: onDetach
AbstractDraweeController: controller 87baf9c 9: release: image: CloseableReference 1a34f21
AbstractDraweeController: controller e14aa9d 2: release: image: CloseableReference 61f0be9
代码:ViewHolder XML
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:fresco="http://schemas.android.com/apk/res-auto"
android:layout_width="120dp"
android:layout_height="match_parent"
android:background="#993366">
<com.facebook.drawee.view.SimpleDraweeView
android:id="@+id/recycler_drawee_view"
android:layout_width="110dp"
android:layout_height="match_parent"
android:background="#336699"
fresco:placeholderImage="@drawable/placeholder" />
<TextView
android:id="@+id/recycler_text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TEST" />
</FrameLayout>
代码:SimpleDraweeView 设置
GenericDraweeHierarchyBuilder builder =
new GenericDraweeHierarchyBuilder(context.getResources());
mHierarchy = builder
.setFadeDuration(300)
.setPlaceholderImage(context.getDrawable(R.drawable.placeholder))
.build();
...
mDraweeView.setHierarchy(mHierarchy);
Uri uri = Uri.parse(imageLink);
DraweeController controller = Fresco.newDraweeControllerBuilder()
.setUri(uri)
.build();
mDraweeView.setController(controller);
代码:RecyclerView.Adapter
@Override
public SimpleHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(mContext).inflate(R.layout.recycler_view_item, viewGroup, false);
return new SimpleHolder(view, mHierarchy);
}
...
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) {
holder.setText(EntryUtils.getFullCaption(mData.get(position)));
holder.setImage(EntryUtils.getThumbnailLink(mData.get(position)));
}
再次感谢。