我的 recyclerView 适配器有一个奇怪的问题,我只想根据选择显示/隐藏 ImageView 但是当我notifyItemChanged(selection)
在点击侦听器中调用时,它会调用onCreateViewHolder
并延迟刷新视图,我不知道为什么而且我没有找到另一种解决方案来执行我需要的操作。
这是我的适配器:
public class ChannelAdapter extends RecyclerView.Adapter<ChannelAdapter.ChannelHolder> {
private ArrayList<Integer> channelList;
private Integer selection = 0;
public ChannelAdapter(ArrayList<Integer> channelList) {
this.channelList = channelList;
}
@NotNull
@Override
public ChannelHolder onCreateViewHolder(ViewGroup parent, int viewType) {
Log.d(TAG, "onCreateViewHolder: ");
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.adapter_channel_item_selected, parent, false);
ChannelHolder holder = new ChannelHolder(view);
return holder;
}
@SuppressLint("SetTextI18n")
@Override
public void onBindViewHolder(ChannelHolder holder, int position) {
Log.d(TAG, "onBindViewHolder: "+position);
holder.textViewChannelId.setText("#"+channelList.get(position));
holder.textViewChannel.setText(channelList.get(position).toString());
if(position==selection){
holder.imageViewSelectorLeft.setVisibility(View.VISIBLE);
holder.imageViewSelectorRight.setVisibility(View.VISIBLE);
}
else{
holder.imageViewSelectorLeft.setVisibility(View.INVISIBLE);
holder.imageViewSelectorRight.setVisibility(View.INVISIBLE);
}
}
@Override
public int getItemCount() {
return channelList.size();
}
public class ChannelHolder extends RecyclerView.ViewHolder {
TextView textViewChannel, textViewChannelId;
ImageView imageViewSelectorLeft, imageViewSelectorRight;
public ChannelHolder(View itemView) {
super(itemView);
textViewChannelId = itemView.findViewById(R.id.textViewChannelId);
textViewChannel = itemView.findViewById(R.id.textViewChannel);
imageViewSelectorLeft = itemView.findViewById(R.id.imageViewSelectorLeft);
imageViewSelectorRight = itemView.findViewById(R.id.imageViewSelectorRight);
itemView.setOnClickListener(v -> {
notifyItemChanged(selection);
selection=getAdapterPosition();
notifyItemChanged(selection);
});
}
}
}
我错过了什么还是我做错了?提前感谢您的帮助
编辑:
我尝试使用notifyItemChanged
设置为 1 的有效负载并覆盖onBindViewHolder
以获取有效负载,但它仍然调用onCreateViewHolder
,即使mSupportsChangeAnimations
设置为 false