android recycleview实现checked单选

最新推荐文章于 2024-05-16 02:17:42 发布

原创最新推荐文章于 2024-05-16 02:17:42 发布 · 813 阅读

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CC 4.0 BY-SA版权

本文介绍如何在自定义的适配器中实现点击监听功能，并通过设置默认选中项来更新视图状态。

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首先在adapter里面键一个接口

 private int currentCheckedItemPosition;
    private OnItemClickListener onItemClickListener;

    public InvitationImageAdapter(Context mComent, List<InvitationImageBean.ContentsBean> list) {
        this.mComent = mComent;
        this.inflater = LayoutInflater.from(mComent);
        this.list = list;
        currentCheckedItemPosition = -1;
    }

 public void setDefaultCheckedItemPosition(int position) {
        currentCheckedItemPosition = position;
    }

    public int getCheckedItemPosition() {
        return currentCheckedItemPosition;
    }

    public void check(int position) {
        setDefaultCheckedItemPosition(position);
        notifyDataSetChanged();
    }

    public void setOnItemClickListener(@NonNull OnItemClickListener listener) {
        onItemClickListener = listener;
    }

    public interface OnItemClickListener {
        void onItemClick(View view, int position, long id);
    }

最后在activity里面调用方法

 adapter.setDefaultCheckedItemPosition(0);
        adapter.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(View view, int position, long id) {
                adapter.check(position);
              

            }
        });