RecycleView（CheckBox全选,反选,单选）

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MainActiivity

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();    }}

Adapter

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);        }    }}

main.xml

<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>

Check.xml

<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" />

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