最近小弟实现了， 一款相册， 但是在实现流水线的时候，recycleview 嵌套 recycleview 加载图片的时候，内存迟迟没法销毁。 导致占用内存到 2g. 下面贴一贴我的代码
public class PhotoAdapter extends RecyclerView.Adapter<PhotoAdapter.ViewHolder> {
private Context context;
private List<PhotoGroup> photoGroupList;
// 构造方法（将图片数据传入）
public PhotoAdapter(List<PhotoGroup> photoGroupList) {
this.photoGroupList = photoGroupList;
}
@Override
public int getItemViewType(int position) {
if (position == 0) {
return 0;
}
return -1;
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
if (context == null) {
context = parent.getContext();
}
// 返回外层 分组的 item
View view = LayoutInflater.from(context).inflate(R.layout.image_group_item, parent, false);
final ViewHolder holder = new ViewHolder(view);
return holder;
}
@Override
public void onViewRecycled(@NonNull ViewHolder holder) {
super.onViewRecycled(holder);
Glide.with(holder.itemView).clear(holder.itemView);
Glide.with(holder.itemView).clear(holder.cardView);
Glide.with(holder.itemView).clear(holder.recyclerView);
}
//将数据绑定到控件上
@Override
public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
PhotoGroup PhotoGroup = photoGroupList.get(position);
ChildAdapter childAdapter = (ChildAdapter) holder.recyclerView.getAdapter();
if (childAdapter == null) {
// 设定 image_group_item 布局（每列显示 4 个子布局 image_child_item ）
GridLayoutManager manager = new GridLayoutManager(context, 4);
holder.recyclerView.setItemViewCacheSize(2000);
holder.recyclerView.setHasFixedSize(true);
holder.recyclerView.setNestedScrollingEnabled(false);
holder.recyclerView.setLayoutManager(manager);
// 设置子布局的适配器 [ PhotoGroup.getPhotoArrayList() 是一个分组中的图片数据]
holder.recyclerView.setAdapter(new ChildAdapter(PhotoGroup.getPhotoArrayList()));
} else {
// 重用子布局的适配，如果已经初始化过，直接调用 notifyDataSetChanged() 刷新布局就行
childAdapter.setData(PhotoGroup.getPhotoArrayList());
// childAdapter.notifyDataSetChanged();
}
}
@Override
public int getItemCount() {
return photoGroupList.size();
}
// ViewHolder 对应 image_group_item 文件，里面元素只有最外层 CardView 和一个嵌套 RecyclerView
static class ViewHolder extends RecyclerView.ViewHolder {
RelativeLayout cardView;
RecyclerView recyclerView;
public ViewHolder(View view) {
super(view);
cardView = (RelativeLayout) view;
recyclerView = (RecyclerView) view.findViewById(R.id.tupian_item_recyclerView);
recyclerView.addOnScrollListener(new ImageAutoLoadScrollListener(view.getContext()));
}
}
/*****************************ChildAdapter ***************************************/
// 嵌套子适配（内部类）
public class ChildAdapter extends RecyclerView.Adapter<ChildViewHolder> {
// 每一个组的图片数据
private ArrayList<Photo> photoList;
//构造函数
public ChildAdapter(ArrayList<Photo> photoList) {
this.photoList = photoList;
}
//用于更新图片数据
public void setData(ArrayList<Photo> photoList) {
this.photoList = photoList;
}
@NonNull
@Override
public ChildViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
if (context == null) {
context = parent.getContext();
}
View view = LayoutInflater.from(context).inflate(R.layout.image_child_item, parent, false);
final ChildViewHolder holder = new ChildViewHolder(view);
return holder;
}
@Override
public void onViewRecycled(@NonNull ChildViewHolder holder) {
super.onViewRecycled(holder);
Glide.with(holder.itemView.getContext()).clear(holder.imageView);
}
@Override
public void onBindViewHolder(@NonNull ChildViewHolder holder, int position) {
Photo image = photoList.get(position);
Uri uri = ContentUris.withAppendedId(
UriUtil.INSTANCE.getMediaType(image.getMediaType()),
image.getId()
);
Glide.with(holder.imageView.getContext())
.asDrawable()
.load(uri)
.thumbnail(0.1f)
.override(SizeUtils.dp2px(100), SizeUtils.dp2px(100))
.placeholder(R.drawable.folder_ripple)
.format(DecodeFormat.PREFER_RGB_565)
.skipMemoryCache(true)
.into(holder.imageView);
}
@Override
public int getItemCount() {
return photoList.size();
}
}
}
下面是我流水线布局的代码
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/main_recyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</androidx.constraintlayout.widget.ConstraintLayout>
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/image_child_item_id"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="2dp"
app:cardCornerRadius="4dp">
<com.example.pic.picmanager.MyRoundImageView
android:id="@+id/image_item_imageView"
android:layout_width="match_parent"
android:layout_height="100dp"
android:adjustViewBounds="true"
android:scaleType="centerCrop"
app:round="4dp" />
</RelativeLayout>
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/image_group_item_id"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:cardCornerRadius="4dp"
app:cardElevation="0dp">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/tupian_item_recyclerView"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>
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