在API 27到29迁移后,可能会遇到Android RecyclerView性能差劲的问题。以下是一些可能的解决方法:
示例代码:
public class MyAdapter extends RecyclerView.Adapter {
private List- itemList;
// ...
public void updateData(List
- newData) {
DiffUtil.DiffResult diffResult = DiffUtil.calculateDiff(new MyDiffCallback(itemList, newData));
itemList = newData;
diffResult.dispatchUpdatesTo(this);
}
// ...
private static class MyDiffCallback extends DiffUtil.Callback {
private List
- oldList;
private List
- newList;
public MyDiffCallback(List
- oldList, List
- newList) {
this.oldList = oldList;
this.newList = newList;
}
@Override
public int getOldListSize() {
return oldList.size();
}
@Override
public int getNewListSize() {
return newList.size();
}
@Override
public boolean areItemsTheSame(int oldItemPosition, int newItemPosition) {
return oldList.get(oldItemPosition).getId() == newList.get(newItemPosition).getId();
}
@Override
public boolean areContentsTheSame(int oldItemPosition, int newItemPosition) {
return oldList.get(oldItemPosition).equals(newList.get(newItemPosition));
}
}
// ...
}
示例代码:
public class MyAdapter extends RecyclerView.Adapter {
// ...
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.item_layout, parent, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
// 绑定数据到ViewHolder
}
@Override
public void onViewRecycled(@NonNull ViewHolder holder) {
super.onViewRecycled(holder);
// 清除ViewHolder中的数据
}
// ...
public static class ViewHolder extends RecyclerView.ViewHolder {
// ...
public ViewHolder(@NonNull View itemView) {
super(itemView);
// 初始化ViewHolder中的视图组件
}
}
// ...
}
这些解决方法可以帮助提高Android RecyclerView在API 27到29迁移后的性能。根据具体情况选择适合的方法来优化性能。