android studio中使用recyclerview小白篇

Posted 2020-09-30 宝鼎波波

继续接着昨天的来,昨天终于弄好了一个例子,但是那个没有点击事件, 需要自己添加,参照别人的例子,弄了个比较简单的,主要是改动myRecycleradatper.java中的部分.

增加如下的接口:

 //增加一个静态的接口.
    private OnItemClickListener listener;
    public static interface OnItemClickListener {
        void onItemClick(View view , int position);
    }
    public void setOnItemClickListener(OnItemClickListener listener) {
        this.listener = listener;
    }

　　

在onBindViewHolder中增加如下的代码

     if (listener != null) {
            holder.v.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    listener.onItemClick(v,position);
                }
            });
        }

　　

这就好了,是目前能找到的比较简洁的方法了.

在主界面中直接使用就可以了.如下:

        recycleAdapter.setOnItemClickListener(new myRecycleradatper.OnItemClickListener() {
            @Override
            public void onItemClick(View view, int position) {
                Log.e("constr"," " + position);
            }
        });

　　

观看点击后log.e的记录值.

 

自定义的数据适配器全部代码如下,供参照,虽然不好,但是能用,我也不知啥意思,以后慢慢理解吧:

public class myRecycleradatper extends RecyclerView.Adapter<myRecycleradatper.MyViewHolder> {
    private List<filelist> mDatas;
    private Context mContext;
    private LayoutInflater inflater;

    //增加一个静态的接口.
    private OnItemClickListener listener;
    public static interface OnItemClickListener {
        void onItemClick(View view , int position);
    }
    public void setOnItemClickListener(OnItemClickListener listener) {
        this.listener = listener;
    }


    public myRecycleradatper(Context context, List<filelist> datas){
        this. mContext=context;
        this. mDatas=datas;
        inflater=LayoutInflater. from(mContext);
    }

    @Override
    public int getItemCount() {
        return mDatas.size();
    }
    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

        View view = inflater.inflate(R.layout.item_view,parent, false);
        MyViewHolder holder= new MyViewHolder(view);

        return holder;
    }

    @Override
    public void onBindViewHolder(MyViewHolder holder, final int position) {
        filelist da=mDatas.get(position);
        if(position%2==0){
            //holder.tv.setBackgroundColor(Color.BLUE);
            holder.v.setBackgroundColor(Color.GRAY);
        }
        if (listener != null) {
            holder.v.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    listener.onItemClick(v,position);
                }
            });
        }
        holder.tv.setText(da.getName());
        holder.msg.setText(da.getZt());

    }

    class MyViewHolder extends RecyclerView.ViewHolder{
        TextView tv;
        TextView msg;
        View v;
        public MyViewHolder(View view) {
            super(view);
            tv=(TextView) view.findViewById(R.id.txt_xs);
            msg=(TextView)view.findViewById(R.id.txt_msg);
            v=view;
        }

    }
}