Android RecycleView

Android RecyclerView 用来替代传统的ListView

要在Android Studio 中使用RecyclerView 首先要依赖相应的包

右键项目--->Open Module Settings---->Dependecies--->添加com.android.support:recycleview

package com.example.tanjin.learnrec;import android.support.v7.app.ActionBarActivity;import android.os.Bundle;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;public class MainActivity extends ActionBarActivity {    private RecyclerView rv;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        rv = new RecyclerView(this);        setContentView(rv);        rv.setLayoutManager(new LinearLayoutManager(this));        rv.setAdapter(new RecyclerView.Adapter() {            class ViewHolder extends RecyclerView.ViewHolder            {                private TextView tv;                public ViewHolder(View itemView)                {                    super(itemView);                    tv = (TextView)itemView;                }                public TextView getTv()                {                    return  tv;                }            }            @Override            public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {                return new ViewHolder(new TextView(viewGroup.getContext()));            }            @Override            public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, int i) {                ViewHolder vh = (ViewHolder)viewHolder;                vh.getTv().setText("item"+i);            }            @Override            public int getItemCount() {                return 1000;            }        });    }}

效果：

Android RecycleView

可以上下滑动

接下来，用一个数组来实现RecycleView

增加一个字符串数组

private String[] data = new String[]{"Hello","Android"};

更改onBindViewHolder方法和getItemCount方法

public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, int i) { ViewHolder vh = (ViewHolder)viewHolder; vh.getTv().setText(data[i]);}

 public int getItemCount() {       return data.length;        }

再次运行

Android RecycleView

由以上可知，使用RecyclerView的重点在设置Adapter

onCreateViewHolder 即创建ViewHolder

onBindViewHolder 即绑定ViewHolder，设置ViewHolder里面的View

getItemCount 返回列表一共有多少项

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