android 相册开发问题

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>