RecyclerView的简单使用

一

     

package com.example.liangshaoteng.myapplication;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.StaggeredGridLayoutManager;

public class MainActivity extends AppCompatActivity {

    private String[] data={"a","b","c","d","e","f","g","h","i","j","k","l","m"};
    public static final String LOG="look";
    private RecyclerView recyclerView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //初始化控件
        recyclerView = (RecyclerView) findViewById(R.id.recyclerview);
        //LinearLayout
        LinearLayoutManager  linearLayoutManager =new LinearLayoutManager(this);
        //GridLayout
        GridLayoutManager gridLayoutManager = new GridLayoutManager(this,3);
        //瀑布流
        StaggeredGridLayoutManager layoutManager=new StaggeredGridLayoutManager(2,StaggeredGridLayoutManager.VERTICAL);
        //设置使用那个模式
        recyclerView.setLayoutManager(layoutManager);
        //adapter
        FruitAdapter fruitAdapter=new FruitAdapter(data);
        recyclerView.setAdapter(fruitAdapter);
    }
}

package com.example.liangshaoteng.myapplication;

import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

/**
 * Created by liangshaoteng on 17-6-20.
 */

public class FruitAdapter extends RecyclerView.Adapter<FruitAdapter.ViewHolder>{

    String[] strings;

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view=LayoutInflater.from(parent.getContext()).inflate(R.layout.activity_main2,parent,false);
        final ViewHolder viewHolder=new ViewHolder(view);
        //设置点击事件
        viewHolder.textView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(v.getContext(),"postion : "+viewHolder.getAdapterPosition(),Toast.LENGTH_LONG).show();
            }
        });
        return viewHolder;
    }

    public FruitAdapter(String[] strings){
        //获取外界传来的数据
        this.strings=strings;
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        //获取当前的数据
        String string = strings[position];
        //设置文本数据
        holder.textView.setText(string);
    }

    @Override
    public int getItemCount() {
        //外界数据的总数
        return strings.length;
    }

    public class ViewHolder extends RecyclerView.ViewHolder {

        private final TextView textView;

        public ViewHolder(View itemView) {
            super(itemView);
            //初始化控件
            textView = (TextView) itemView.findViewById(R.id.tv);
        }
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main2"
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="50dp"
    tools:context="com.example.liangshaoteng.myapplication.Main2Activity">

    
    <ImageView
        android:layout_gravity="center"
        android:src="@android:drawable/alert_dark_frame"
        android:id="@+id/iv"
        android:layout_width="50dp"
        android:layout_height="50dp"
        />
    <TextView
        android:id="@+id/tv"
        android:text="465"
        android:layout_marginLeft="20dp"
        android:gravity="center_vertical"
        android:layout_gravity="center_vertical"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
</LinearLayout>