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  • checkbox实现单选,全选,反选,取消选

    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical" >
      <LinearLayout 
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          >
        <Button 
            android:id="@+id/button1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="全选"
            android:layout_weight="1"
            />
        <Button 
            android:id="@+id/button2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="反 选"
             android:layout_weight="1"
            />
        <Button 
            android:id="@+id/button3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="全不选"
             android:layout_weight="1"
            />
    </LinearLayout>
    <ListView 
        android:id="@+id/listveiw"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        
        ></ListView>
      
      
      
      
    </LinearLayout>
    

      

    listveiw.xml

    如果ListView的Item中包含CheckBox,由于CheckBox的焦点优先级高于ListView,所以当选中ListView时,ListView将不会有选中的状态,解决的方法就是在checkbox组件中加一属性:android:focusable="false"

    <?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
       <TextView 
           android:id="@+id/text"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:text="ddd"
           
           />
    
       <CheckBox
           android:id="@+id/checkbox"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
          
            android:focusable="false"  
           
           android:layout_alignParentRight="true"
           android:layout_alignParentTop="true" />
    
    </RelativeLayout>
    

      MainActivity.java

    package com.bawei.day04_listview;
    
    import java.util.ArrayList;
    import java.util.List;
    
    import com.bawei.vo.Good;
    
    import android.os.Bundle;
    import android.app.Activity;
    import android.view.Menu;
    import android.view.View;
    import android.view.View.OnClickListener;
    import android.widget.BaseAdapter;
    import android.widget.Button;
    import android.widget.ListView;
    
    public class MainActivity extends Activity {
    
        private Button button1;
        private Button button2;
        private Button button3;
        private ListView listView;
        private List<Good> list;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            button1 = (Button) findViewById(R.id.button1);
            button2 = (Button) findViewById(R.id.button2);
            button3 = (Button) findViewById(R.id.button3);
            listView = (ListView) findViewById(R.id.listveiw);
            list = new ArrayList<Good>();
            for (int i = 0; i < 60; i++) {
                list.add(new Good("PP"+i, false));
            }
            
            BaseAdapter adapter=new Adper(list,MainActivity.this,button1,button2,button3);
            listView.setAdapter(adapter);
            
          
        }
    
    }
    

      list的vo包Good.java

    package com.bawei.vo;
    
    public class Good {
    private String name;
    private boolean bo;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public boolean getBo() {
        return bo;
    }
    public void setBo(boolean bo) {
        this.bo = bo;
    }
    @Override
    public String toString() {
        return "Good [name=" + name + ", bo=" + bo + "]";
    }
    public Good(String name, boolean bo) {
        super();
        this.name = name;
        this.bo = bo;
    }
    public Good() {
        super();
    }
    
    }
    

      Adper.java

    package com.bawei.day04_listview;
    
    import java.util.List;
    
    import com.bawei.vo.Good;
    
    import android.content.Context;
    import android.view.View;
    import android.view.View.OnClickListener;
    import android.view.ViewGroup;
    import android.widget.BaseAdapter;
    import android.widget.Button;
    import android.widget.CheckBox;
    import android.widget.CompoundButton;
    import android.widget.CompoundButton.OnCheckedChangeListener;
    import android.widget.TextView;
    
    public class Adper extends BaseAdapter {
        List<Good> list;
        Context context;
        Button button1;
        Button button2;
        Button button3;
        public Adper(List<Good> list, Context context, Button button1, Button button2, Button button3) {
            // TODO Auto-generated constructor stub
        this.list=list;
        this.context=context;
        this.button1=button1;
        this.button2=button2;
        this.button3=button3;
        }
    
        public int getCount() {
            // TODO Auto-generated method stub
            return list.size();
        }
    
        public Object getItem(int position) {
            // TODO Auto-generated method stub
            return null;
        }
    
        public long getItemId(int position) {
            // TODO Auto-generated method stub
            return 0;
        }
    
        public View getView(final int position, View convertView, ViewGroup parent) {
            // TODO Auto-generated method stub
            final ViewHolder viewHolder;
            if(convertView==null){
                convertView=View.inflate(context, R.layout.listveiw, null);
             viewHolder=new ViewHolder();
             viewHolder.textView=(TextView) convertView.findViewById(R.id.text);
            viewHolder.checkBox=(CheckBox) convertView.findViewById(R.id.checkbox); 
            convertView.setTag(viewHolder);
            }else{
                viewHolder=(ViewHolder) convertView.getTag();
            }
            viewHolder.textView.setText(list.get(position).getName());
            
            //checkbox监听
            viewHolder.checkBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
                
                public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                    // TODO Auto-generated method stub
                     if(isChecked){
                        
                         list.get(position).setBo(isChecked);
                        
                    }else{
                        
                        list.get(position).setBo(isChecked);
                        
                    }
    
                }
            });
            //全选 
            button1.setOnClickListener(new OnClickListener() {
                
                public void onClick(View v) {
                    // TODO Auto-generated method stub
                    for (int i = 0; i < list.size(); i++) {
                        //改变boolean
                        list.get(i).setBo(true);
                        //刷新
                        notifyDataSetChanged();
                    }
                    
                }
            });
            
            //反选
            button2.setOnClickListener(new OnClickListener() {
                
                public void onClick(View v) {
                    // TODO Auto-generated method stub
                    for (int i = 0; i < list.size(); i++) {
                        if(list.get(i).getBo()){
                            list.get(i).setBo(false);
                        }else{
                            list.get(i).setBo(true);
                        }
                        notifyDataSetChanged();
                    }
                }
            });
            //全不选
            button3.setOnClickListener(new OnClickListener() {
                
                public void onClick(View v) {
                    // TODO Auto-generated method stub
                    for (int i = 0; i < list.size(); i++) {
                        
                        list.get(i).setBo(false);
                        
                        notifyDataSetChanged();
                    }
                }
            });
            //显示checkBox
            viewHolder.checkBox.setChecked(list.get(position).getBo());
            return convertView;
        }
    class ViewHolder{
        TextView textView;
        CheckBox checkBox;
    }
    }
    

      

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  • 原文地址:https://www.cnblogs.com/jsonfan/p/5384170.html
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