当我快速滚动我的RecyclerView时,我注意到在将图像实际加载到ImageView之前出现了空白的ImageView(使用Glide)。如果图像没有成功加载,我宁愿它不显示任何东西而不是空的ImageView容器。我不希望显示空的ImageView,除非它有加载的图像。在加载图像之前看到下面的空ImageView出现在视觉上是不愉快的,即使它在默认淡入之前只有几毫秒来自Glide的开始:
XML(删除了irrelvant代码)
<LinearLayout
android:id="@+id/image_holder_layout"
android:layout_width="85dp"
android:layout_height="85dp"
android:layout_centerVertical="true"
android:layout_marginLeft="8dp"
android:layout_marginStart="8dp"
android:gravity="center"
android:visibility="invisible">
<ImageView
android:id="@+id/flyer_item_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:background="@android:drawable/dialog_holo_light_frame" />
</LinearLayout>
RecyclerAdapter.java
public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.ItemHolder> {
private ArrayList<Item> items;
Context context;
public RecyclerAdapter(Context context, ArrayList<Item> items) {
this.items = items;
this.context = context;
}
@Override
public ItemHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
Context context = viewGroup.getContext();
boolean shouldAttachToParentImmediately = false;
View view = LayoutInflater.from(context).inflate(R.layout.list_row_flyer, viewGroup, shouldAttachToParentImmediately);
ItemHolder viewHolder = new ItemHolder(view);
return viewHolder;
}
@Override
public void onBindViewHolder(ItemHolder holder, int position) {
holder.bind(position);
}
class ItemHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
LinearLayout itemImageLinearLayout;
ImageView itemImage;
public ItemHolder(View view) {
super(view);
itemImageLinearLayout = (LinearLayout) view.findViewById(R.id.image_holder_layout);
this.itemImage = (ImageView) view.findViewById(R.id.flyer_item_image);
}
void bind(int listIndex) {
Glide.with(context)
.load(items.get(listIndex).getImageUrl())
.diskCacheStrategy(DiskCacheStrategy.ALL)
.override(Target.SIZE_ORIGINAL, Target.SIZE_ORIGINAL)
.into(itemImage);
itemImageLinearLayout.setVisibility(View.VISIBLE);
}
}
}
澄清一下:Glide淡入动画对我来说并不是必需的。如果解决方案更容易没有淡入,我就可以了。
答案 0 :(得分:1)
尝试以下任何选项
删除:android:background =&#34; @android:drawable / dialog_holo_light_frame&#34;来自imageView
尝试为imageView添加占位符。这将在加载实际图像之前添加默认图像
Glide.with(本) .load(URL) .placeholder(R.drawable.placeholder) .into(ImageView的);