Android RecycleView使用（CheckBox全选、反选、单选）

package com.bwie.day06;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;

import com.bwie.day06.myadapter.MyAdapter;

public class MainActivity extends AppCompatActivity {

  private MyAdapter myAdapter;
  private LinearLayoutManager linearLayoutManager;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    //初始化控件
    RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recyclerview);
    //在加载数据之前配置
    linearLayoutManager = new LinearLayoutManager(this);
    recyclerView.setLayoutManager(linearLayoutManager);
    //创建一个适配器
    myAdapter = new MyAdapter();
    recyclerView.setAdapter(myAdapter);


  }

  public void btnAll(View view) {
    myAdapter.All();
  }

  public void btnner(View view) {
    myAdapter.neverall();
  }
}

package com.bwie.day06.myadapter;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.TextView;
import com.bwie.day06.R;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder  {
//这个是checkbox的Hashmap集合
private final HashMap<Integer, Boolean  map;
//这个是数据集合
private final ArrayList<String  list;
public MyAdapter() {
map = new HashMap< ();
list = new ArrayList< ();
for (int i = 0; i < 30; i++) {
//添加30条数据
list.add("这是条目" + i);
map.put(i, false);
}
}
/**
* 全选
*/
public void All() {
Set<Map.Entry<Integer, Boolean   entries = map.entrySet();
boolean shouldall = false;
for (Map.Entry<Integer, Boolean  entry : entries) {
Boolean value = entry.getValue();
if (!value) {
shouldall = true;
break;
}
}
for (Map.Entry<Integer, Boolean  entry : entries) {
entry.setValue(shouldall);
}
notifyDataSetChanged();
}
/**
* 反选
*/
public void neverall() {
Set<Map.Entry<Integer, Boolean   entries = map.entrySet();
for (Map.Entry<Integer, Boolean  entry : entries) {
entry.setValue(!entry.getValue());
}
notifyDataSetChanged();
}
/**
* 单选
*
* @param postion
*/
public void singlesel(int postion) {
Set<Map.Entry<Integer, Boolean   entries = map.entrySet();
for (Map.Entry<Integer, Boolean  entry : entries) {
entry.setValue(false);
}
map.put(postion, true);
notifyDataSetChanged();
}
//这里主要初始化布局控件
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
RecyclerView.LayoutManager layoutManager = ((RecyclerView) parent).getLayoutManager();
//初始化布局文件
View inflate = LayoutInflater.from(parent.getContext()).inflate(R.layout.check, parent, false);
return new MyViewHolder(inflate);
}
@Override
public void onBindViewHolder(final MyViewHolder holder, final int position) {
//放入集合中的值
holder.txt.setText(list.get(position));
holder.checkBox.setChecked(map.get(position));
holder.checkBox.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
map.put(position, !map.get(position));
//刷新适配器
notifyDataSetChanged();
//单选
//        singlesel(position);
}
});
}
@Override
public int getItemCount() {
return list.size();
}
public class MyViewHolder extends RecyclerView.ViewHolder {
View itemView;
private TextView txt;
private CheckBox checkBox;
//初始化控件
public MyViewHolder(View itemView) {
super(itemView);
this.itemView = itemView;
txt = (TextView) itemView.findViewById(R.id.txt);
checkBox = (CheckBox) itemView.findViewById(R.id.cbox);
}
}
}

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" 
<Button
android:onClick="btnAll"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="全选" / 
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="反选"
android:onClick="btnner"/ 
</LinearLayout 
<android.support.v7.widget.RecyclerView
android:id="@+id/recyclerview"
android:layout_width="match_parent"
android:layout_height="match_parent" </android.support.v7.widget.RecyclerView 

<CheckBox
android:id="@+id/cbox"
android:layout_width="wrap_content"
android:layout_height="wrap_content" / 
<TextView
android:text="dfdfdfdf"
android:id="@+id/txt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp" /