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" />