recyleView使用笔记

直接上代码：

package com.test.recycleview;

import android.app.Activity;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;

/**
 * test recyleView
 */
public class MainActivity extends Activity{
    private RecyclerView recyclerView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        recyclerView=new RecyclerView(this);
        ViewGroup.LayoutParams params=new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
        setContentView(recyclerView,params);
        initRecycleView();
        initData();
    }
    private void initRecycleView(){
        LinearLayoutManager manager=new LinearLayoutManager(this);
        recyclerView.setLayoutManager(manager);
        recyclerView.addOnItemTouchListener(new RecyclerView.OnItemTouchListener() {
            @Override
            public boolean onInterceptTouchEvent(RecyclerView recyclerView, MotionEvent event) {
                return false;
            }

            @Override
            public void onTouchEvent(RecyclerView recyclerView, MotionEvent event) {

            }
        });

        recyclerView.addItemDecoration(new RecyclerView.ItemDecoration() {
            @Override
            public void onDrawOver(Canvas c, RecyclerView parent, RecyclerView.State state) {
                super.onDraw(c, parent, state);
                Paint paint=new Paint();
                paint.setColor(Color.GRAY);
                paint.setStrokeWidth(3);
                for (int i = 0, size = parent.getChildCount(); i < size; i++) {
                    View child = parent.getChildAt(i);
                    c.drawLine(0, child.getBottom(), parent.getRight(), child.getBottom(), paint);
                }
            }
        });

    }
    public void initData(){
        ArrayList<String> data=new ArrayList<String>(50);
        for (int i=0;i<100;i++){
            data.add(String.valueOf(i));
        }
        recyclerView.setAdapter(new MyAdapter(data));
    }
    public class MyAdapter extends RecyclerView.Adapter{
        ArrayList<String> data;

        public MyAdapter(ArrayList<String> data) {
            this.data = data;
        }

        @Override
        public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
            View view=View.inflate(MainActivity.this, android.R.layout.simple_list_item_1,null);
            ViewGroup.LayoutParams params=new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
            view.setLayoutParams(params);
            return new ViewHolder(view);
        }

        @Override
        public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, int i) {
            ((ViewHolder)viewHolder).textView.setText(String.valueOf(i));
        }

        @Override
        public int getItemCount() {
            return data.size();
        }

        private class ViewHolder extends RecyclerView.ViewHolder{
            public TextView textView;
            public ViewHolder(View itemView) {
                super(itemView);
                textView= (TextView) itemView;
                textView.setGravity(Gravity.CENTER);
                itemView.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        Toast.makeText(MainActivity.this,"click postion:"+getPosition()+" content: "+textView.getText(),Toast.LENGTH_LONG).show();
                    }
                });
            }
        }
    }

}