深入解析Android中的RecyclerView组件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="vertical" >

 <!-- A RecyclerView with some commonly used attributes -->
<android.support.v7.widget.RecyclerView
 android:id="@+id/my_recycler_view"
 android:scrollbars="vertical"
 android:layout_width="match_parent"
 android:layout_height="match_parent"/>
</LinearLayout>

package com.androidl.bob;

public class Bean {
 public static final int Y_TYPE = 0; //view类型0
 public static final int X_TYPE = 1; //view类型2
 public static final int Z_TYPE = 2;//view 类型3
 private int type;
 private String text;

 public Bean(int type, String text) {
  super();
  this.type = type;
  this.text = text;
 }

 public int getType() {
  return type;
 }

 public void setType(int type) {
  this.type = type;
 }

 public String getText() {
  return text;
 }

 public void setText(String text) {
  this.text = text;
 }

}

package com.androidl.bob;

import java.util.List;

import com.example.androidl.R;

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

/**
 * Date : 2014/7/15
 * 
 * @author edsheng
 * 
 */
public class RecycleAdapter extends RecyclerView.Adapter<ViewHolder> {

 private List<Bean> beans;

 public RecycleAdapter(List<Bean> beans) {
  super();
  this.beans = beans;
 }

 /**
  * 内部TextHoler
  * 
  * @author edsheng
  * 
  */
 public class TextHoler extends RecyclerView.ViewHolder {
  public TextView textView;

  public TextHoler(View textview) {
   super(textview);
   this.textView = (TextView) textview.findViewById(R.id.mytext);
  }
 }

 /**
  * iamgeHolder
  * 
  * @author edsheng
  * 
  */
 public class ImageHoler extends RecyclerView.ViewHolder {
  public ImageView Imageview;

  public ImageHoler(View textview) {
   super(textview);
   this.Imageview = (ImageView) textview.findViewById(R.id.myiamge);
  }
 }

 /**
  * 按钮的holder
  * 
  * @author edsheng
  * 
  */
 public class ButtonHolder extends RecyclerView.ViewHolder {
  public Button button;

  public ButtonHolder(View textview) {
   super(textview);
   this.button = (Button) textview.findViewById(R.id.mybutton);
  }
 }

 @Override
 public int getItemCount() {
  // TODO Auto-generated method stub
  return beans.size();
 }

 /**
  * 获取消息的类型
  */
 @Override
 public int getItemViewType(int position) {
  // TODO Auto-generated method stub
  return beans.get(position).getType();
 }

 /**
  * 创建VIewHolder
  */
 @Override
 public ViewHolder onCreateViewHolder(ViewGroup parent, int viewtype) {
  // TODO Auto-generated method stub
  View v = null;
  ViewHolder holer = null;
  switch (viewtype) {
  case Bean.X_TYPE:
   v = LayoutInflater.from(parent.getContext()).inflate(
     R.layout.recylce_item_x, null);
   holer = new TextHoler(v);
   break;
  case Bean.Y_TYPE:
   v = LayoutInflater.from(parent.getContext()).inflate(
     R.layout.recylce_item_y, null);
   holer = new ButtonHolder(v);
   break;
  case Bean.Z_TYPE:
   v = LayoutInflater.from(parent.getContext()).inflate(
     R.layout.recylce_item_z, null);
   holer = new ImageHoler(v);
   break;
  }

  return holer;
 }

 /**
  * 绑定viewholder
  */
 @Override
 public void onBindViewHolder(ViewHolder holder, int position) {
  // TODO Auto-generated method stub
  switch (getItemViewType(position)) {
  case Bean.X_TYPE:
   TextHoler textholer = (TextHoler) holder;
   textholer.textView.setText(beans.get(position).getText());
   break;
  case Bean.Y_TYPE:
   ButtonHolder buttonHolder = (ButtonHolder) holder;
   buttonHolder.button.setText(beans.get(position).getText());
   break;
  case Bean.Z_TYPE:
   ImageHoler imageHoler = (ImageHoler) holder;
   // imageHoler.Imageview.setImageResource(android.R.drawable.checkbox_on_background);
   break;
  }
 }
}

package com.androidl.bob;

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

import android.app.Activity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;

import com.example.androidl.R;

public class Mainactivity extends Activity {
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  // TODO Auto-generated method stub
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main_activity);
   RecyclerView mRecyclerView = (RecyclerView) findViewById(R.id.my_recycler_view);

// // improve performance if you know that changes in content
// // do not change the size of the RecyclerView
//  mRecyclerView.setHasFixedSize(true);

   //创建布局管理器
  LinearLayoutManager mLayoutManager = new LinearLayoutManager(this);
  mLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
  mRecyclerView.setLayoutManager(mLayoutManager);

  //初始化数据
  List<Bean> myDataset = new ArrayList<Bean>();

  myDataset.add(new Bean(Bean.Z_TYPE, "图片"));
  myDataset.add(new Bean(Bean.X_TYPE, "文字"));
  myDataset.add(new Bean(Bean.Y_TYPE, "按钮"));
  myDataset.add(new Bean(Bean.Z_TYPE, "图片"));
  myDataset.add(new Bean(Bean.X_TYPE, "shit"));
  myDataset.add(new Bean(Bean.X_TYPE, "我擦"));
  myDataset.add(new Bean(Bean.Z_TYPE, "图片"));
  myDataset.add(new Bean(Bean.Y_TYPE, "按钮"));
  myDataset.add(new Bean(Bean.Y_TYPE, "按钮"));
  myDataset.add(new Bean(Bean.X_TYPE, "文字"));
  //创建Adapter
  RecycleAdapter mAdapter = new RecycleAdapter(myDataset);
  mRecyclerView.setAdapter(mAdapter);

 }

}