Android学习笔记--RecyclerView控件的使用

首先我们要依赖 

compile 'com.android.support:recyclerview-v7:25.0.0'
之后才可以使用

recyclerview

XMl文件

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.wuxianedu.alistshengjiban.MainActivity">

    <android.support.v7.widget.RecyclerView
        android:layout_width="match_parent" android:id="@+id/rv_id"
        android:layout_height="match_parent" android:layout_below="@+id/buju" />
    <LinearLayout android:id="@+id/buju"  android:orientation="horizontal"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
        <Button android:id="@+id/but_id" android:text="网格视图"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
        <Button android:id="@+id/but_xianxing" android:text="线性布局"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
        <Button android:id="@+id/but_tianjia" android:text="添加ITEM"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    </LinearLayout>

</RelativeLayout>

 MainActivity

package com.wuxianedu.alistshengjiban;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.StaggeredGridLayoutManager;
import android.view.View;
import android.widget.Button;
import android.widget.RemoteViews;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity implements View.OnClickListener{
    private RecyclerView recyclerView;
    private MyAdaoter myAdaoter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        recyclerView = (RecyclerView) findViewById(R.id.rv_id);
        findViewById(R.id.but_id).setOnClickListener(this);
        findViewById(R.id.but_xianxing).setOnClickListener(this);
        findViewById(R.id.but_tianjia).setOnClickListener(this);

        final List<String> list = new ArrayList<>();
        //循环赋值
        for (int i = 0; i < 10; i++) {
            if(i%2 == 0){
                list.add("我"+ i );
            }else {
                list.add(i+"");
            }
        }
        //new一个Adapter
        myAdaoter = new MyAdaoter(list,this);
        //这里是接口回调，因为RecyclerView没有点击事件，所有需要自己写接口
        myAdaoter.setOnItem(new MyAdaoter.IsetOnc() {
            //点击事件回调
            @Override
            public void setOnClickList(int xiabiao) {
                //回调过来的下标
                Toast.makeText(MainActivity.this, "你点击了"+xiabiao, Toast.LENGTH_SHORT).show();
            }
            //长按事件回调
            @Override
            public void setOnLongClickList(int xiabiao) {
                //移除数据
                myAdaoter.recelm(xiabiao);
            }
        });
        recyclerView.setAdapter(myAdaoter);


        //获取布局管理器
       recyclerView.setLayoutManager(new LinearLayoutManager(this));
        //1.context  2 布局方向，3 是否倒序
        //recyclerView.setLayoutManager(new LinearLayoutManager(this,LinearLayoutManager.HORIZONTAL,false));
        //recyclerView.setLayoutManager(new StaggeredGridLayoutManager(2,StaggeredGridLayoutManager.VERTICAL));
        //瀑布流
        recyclerView.addItemDecoration(new DividerItemDecoration(this,DividerItemDecoration.HORIZONTAL_LIST));

    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.but_id://网格布局
                recyclerView.setLayoutManager(new StaggeredGridLayoutManager(2,StaggeredGridLayoutManager.VERTICAL));
                break;
            case R.id.but_xianxing://线性布局
                recyclerView.setLayoutManager(new LinearLayoutManager(this,LinearLayoutManager.VERTICAL,false));
                break;
            case R.id.but_tianjia://添加数据
                myAdaoter.addImte("我是惠");
                break;
        }
    }
}

MyAdaoter代码

package com.wuxianedu.alistshengjiban;

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

import java.util.List;

/**
 * Created by Administrator on 2016/11/15.
 */
public class MyAdaoter extends RecyclerView.Adapter<MyAdaoter.ViewHolder> {
    private List<String> list;
    private Context context;
    private IsetOnc isetonc;

    /**
     * 删除集合
     */
    public  void recelm(int dizhi){
        list.remove(dizhi);
        notifyItemRemoved(dizhi);
        notifyItemRangeChanged(dizhi,list.size()-1);
    }

    /**
     * 添加子条目
     * @param str
     */
    public void addImte(String str){
        list.add(4,str);
        notifyItemInserted(4);
        notifyItemRangeChanged(4,list.size()-4);
    }

    public MyAdaoter(List<String> list,Context context) {
        this.list = list;
        this.context = context;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_adapter,parent,false);
        ViewHolder viewHolder = new ViewHolder(view);
        return viewHolder;
    }
    /**
     * 类似GetView
     * @param holder
     * @param position
     */
    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        holder.textView.setText(list.get(position));
        //setTag当前的TAG
        holder.itemView.setTag(position);
    }
    /**
     * 长度
     * @return
     */
    @Override
    public int getItemCount() {
        return list.size();
    }
    /**
     * 初始化组件
     */
    class ViewHolder extends RecyclerView.ViewHolder{
        TextView textView;
        public ViewHolder(final View itemView) {
            super(itemView);
            textView = (TextView) itemView.findViewById(R.id.tv_id);
            itemView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if(isetonc != null){
                        //点击id时候判断如果isetonc不为空的时候再给接口赋值，这样就不会出现空指针了
                        //获取之前setTag的值，给接口赋值
                        isetonc.setOnClickList((Integer) itemView.getTag());
                    }
                }
            });
            itemView.setOnLongClickListener(new View.OnLongClickListener() {
                @Override
                public boolean onLongClick(View v) {
                    if(isetonc != null){
                        //点击id时候判断如果isetonc不为空的时候再给接口赋值，这样就不会出现空指针了
                        isetonc.setOnLongClickList((Integer) itemView.getTag());
                    }
                    return true;
                }
            });
        }
    }
    /**
     * 给接口赋值
     * @param isetonc
     */
    public void setOnItem(IsetOnc isetonc){
        this.isetonc = isetonc;
    }
    interface IsetOnc{
        //点击事件
        void setOnClickList(int xiabiao);
        //长按事件
        void setOnLongClickList(int xiabiao);
    }
}

今天有事，就先写这些，以后在补