Android开发之ListView条目批量选择删除

2021-08-20 08:49:58

ListView实现的列表，如果是可编辑，可删除的，一般都要提供批量删除功能，否则的话，一项一项的删除体验很不好，也给用户带来了很大的麻烦。

实现效果图

具体实现代码

select.xml

主布局文件包含一个ListView还有一个隐藏的布局，包含了两个Button一个TextView,默认布局为gone，当监听到长按响应事件时候显示。

<?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" >
   
   <ListView 
       
       android:id="@+id/list"
       android:layout_width="match_parent"
       android:layout_height="match_parent"
       android:layout_weight="1"
       android:cacheColorHint="#FFF" >

       </ListView>
       
   <RelativeLayout 
       
       android:id="@+id/relative"
       android:layout_width="fill_parent"
       android:layout_height="50dp"
       android:gravity="bottom"
       android:background="@color/lemonchiffon"
       android:visibility="gone"
       >
       <Button 
           
           android:id="@+id/cancle"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:text="撤销    |"
           android:textSize="20sp"
           android:background="@null"
           android:layout_centerVertical="true"
           
           />
       <TextView 
           
           android:id="@+id/txtcount"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:text="共计"
           android:textSize="15sp"
           android:layout_centerInParent="true"
           
           />
       
       <Button 
           
           android:id="@+id/delete"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:text="|  删除"
           android:textSize="20sp"
           android:background="@null"
           android:layout_alignParentRight="true"
           android:layout_centerVertical="true"
           />
       
       
   </RelativeLayout>
</LinearLayout>

item.xml

包含一个TextView 一个CheckBox

<?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="horizontal" >
  
   <TextView
       android:id="@+id/txtName"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:layout_alignParentLeft="true"
       android:layout_centerVertical="true"
       android:layout_gravity="center_vertical"
       android:layout_marginLeft="5dp"
       android:layout_weight="1"
       android:text="444444444444"
       android:textSize="17sp"
       android:textColor="#333" />
   
   <CheckBox 
       android:id="@+id/check"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:visibility="gone"
       android:clickable="false"
       />
</LinearLayout>

通过自定义Adapter绑定ListView数据源，实现长按监听，在长按监听时候，切记将监听事件返回ture。

/**
    * @author ieasy360_1
    * 自定义Adapter
    */
   class Adapter extends BaseAdapter{
       private Context context;
       private LayoutInflater inflater=null;
       private HashMap<Integer, View> mView ;
       public  HashMap<Integer, Integer> visiblecheck ;//用来记录是否显示checkBox
       public  HashMap<Integer, Boolean> ischeck;
       private TextView txtcount;
       public Adapter(Context context,TextView txtcount)
       {
           this.context = context;
           this.txtcount = txtcount;
           inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
           mView = new HashMap<Integer, View>();
           visiblecheck = new HashMap<Integer, Integer>();
           ischeck      = new HashMap<Integer, Boolean>();
           if(isMulChoice){
               for(int i=0;i<array.size();i++){
                   ischeck.put(i, false);
                   visiblecheck.put(i, CheckBox.VISIBLE);
               }
           }else{
               for(int i=0;i<array.size();i++)
               {
                   ischeck.put(i, false);
                   visiblecheck.put(i, CheckBox.INVISIBLE);
               }
           }
       }

       public int getCount() {
           // TODO Auto-generated method stub
           return array.size();
       }

       public Object getItem(int position) {
           // TODO Auto-generated method stub
           return array.get(position);
       }

       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
           View view = mView.get(position);
           if(view==null)
           {
               view = inflater.inflate(R.layout.item, null);
               TextView txt = (TextView)view.findViewById(R.id.txtName);
               final CheckBox ceb = (CheckBox)view.findViewById(R.id.check);
               
               txt.setText(array.get(position));
               
               ceb.setChecked(ischeck.get(position));
               ceb.setVisibility(visiblecheck.get(position));
               
               view.setOnLongClickListener(new Onlongclick());
               
               view.setOnClickListener(new OnClickListener() {
                   
                   public void onClick(View v) {
                       // TODO Auto-generated method stub
                       if(isMulChoice){
                           if(ceb.isChecked()){
                               ceb.setChecked(false);
                               selectid.remove(array.get(position));
                           }else{
                               ceb.setChecked(true);
                               selectid.add(array.get(position));
                           }
                           txtcount.setText("共选择了"+selectid.size()+"项");
                       }else {
                           Toast.makeText(context, "点击了"+array.get(position), Toast.LENGTH_LONG).show();
                       }
                   }
               });
               
               mView.put(position, view);
           }
           return view;
       }
       
       class Onlongclick implements OnLongClickListener{

           public boolean onLongClick(View v) {
               // TODO Auto-generated method stub
               
               isMulChoice = true;
               selectid.clear();
               layout.setVisibility(View.VISIBLE);
               for(int i=0;i<array.size();i++)
               {
                   adapter.visiblecheck.put(i, CheckBox.VISIBLE);
               }
               adapter = new Adapter(context,txtcount);
               listview.setAdapter(adapter);
               return true;
           }
       }
   }

全部实现代码

package com.example.test;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnLongClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;

/**
* @author ieasy360_1
* 
*/
public class MulSelect extends Activity implements OnClickListener {
   
   private ListView listview;
   private Context  context;
   private List<String> array = new ArrayList<String>();
   private List<String> selectid = new ArrayList<String>();
   private boolean isMulChoice = false; //是否多选
   private Adapter  adapter;
   private RelativeLayout layout;
   private Button cancle,delete;
   private TextView txtcount;

   @Override
   protected void onCreate(Bundle savedInstanceState) {
       // TODO Auto-generated method stub
       super.onCreate(savedInstanceState);
       setContentView(R.layout.select);
       context = this;
       listview = (ListView)findViewById(R.id.list);
       layout = (RelativeLayout)findViewById(R.id.relative);
       txtcount = (TextView)findViewById(R.id.txtcount);
       cancle   = (Button)findViewById(R.id.cancle);
       delete   = (Button)findViewById(R.id.delete);
       cancle.setOnClickListener(this);
       delete.setOnClickListener(this);
       init();
       adapter = new Adapter(context,txtcount);
       listview.setAdapter(adapter);
       
   }
   
   void init()
   {
       for(int i=0;i<20;i++)
       {
           array.add("小明"+i);
       }
   }
   
   public void onClick(View v) {
       // TODO Auto-generated method stub
       switch (v.getId()) {
       case R.id.cancle:
           isMulChoice = false;
           selectid.clear();
           adapter = new Adapter(context,txtcount);
           listview.setAdapter(adapter);
           layout.setVisibility(View.INVISIBLE);
           break;
       case R.id.delete:
           isMulChoice =false;
           for(int i=0;i<selectid.size();i++){
               for(int j=0;j<array.size();j++){
                   if(selectid.get(i).equals(array.get(j))){
                       array.remove(j);
                   }
               }
           }
           selectid.clear();
           adapter = new Adapter(context,txtcount);
           listview.setAdapter(adapter);
           layout.setVisibility(View.INVISIBLE);
           break;
       default:
           break;
       }
       
   }
   
   @Override
   public void onCreateContextMenu(ContextMenu menu, View v,
           ContextMenuInfo menuInfo) {
       // TODO Auto-generated method stub
       super.onCreateContextMenu(menu, v, menuInfo);
       menu.setHeaderTitle("操作");
   }

   /**
    * @author ieasy360_1
    * 自定义Adapter
    */
   class Adapter extends BaseAdapter{
       private Context context;
       private LayoutInflater inflater=null;
       private HashMap<Integer, View> mView ;
       public  HashMap<Integer, Integer> visiblecheck ;//用来记录是否显示checkBox
       public  HashMap<Integer, Boolean> ischeck;
       private TextView txtcount;
       public Adapter(Context context,TextView txtcount)
       {
           this.context = context;
           this.txtcount = txtcount;
           inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
           mView = new HashMap<Integer, View>();
           visiblecheck = new HashMap<Integer, Integer>();
           ischeck      = new HashMap<Integer, Boolean>();
           if(isMulChoice){
               for(int i=0;i<array.size();i++){
                   ischeck.put(i, false);
                   visiblecheck.put(i, CheckBox.VISIBLE);
               }
           }else{
               for(int i=0;i<array.size();i++)
               {
                   ischeck.put(i, false);
                   visiblecheck.put(i, CheckBox.INVISIBLE);
               }
           }
       }

       public int getCount() {
           // TODO Auto-generated method stub
           return array.size();
       }

       public Object getItem(int position) {
           // TODO Auto-generated method stub
           return array.get(position);
       }

       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
           View view = mView.get(position);
           if(view==null)
           {
               view = inflater.inflate(R.layout.item, null);
               TextView txt = (TextView)view.findViewById(R.id.txtName);
               final CheckBox ceb = (CheckBox)view.findViewById(R.id.check);
               
               txt.setText(array.get(position));
               
               ceb.setChecked(ischeck.get(position));
               ceb.setVisibility(visiblecheck.get(position));
               
               view.setOnLongClickListener(new Onlongclick());
               
               view.setOnClickListener(new OnClickListener() {
                   
                   public void onClick(View v) {
                       // TODO Auto-generated method stub
                       if(isMulChoice){
                           if(ceb.isChecked()){
                               ceb.setChecked(false);
                               selectid.remove(array.get(position));
                           }else{
                               ceb.setChecked(true);
                               selectid.add(array.get(position));
                           }
                           txtcount.setText("共选择了"+selectid.size()+"项");
                       }else {
                           Toast.makeText(context, "点击了"+array.get(position), Toast.LENGTH_LONG).show();
                       }
                   }
               });
               
               mView.put(position, view);
           }
           return view;
       }
       
       class Onlongclick implements OnLongClickListener{

           public boolean onLongClick(View v) {
               // TODO Auto-generated method stub
               
               isMulChoice = true;
               selectid.clear();
               layout.setVisibility(View.VISIBLE);
               for(int i=0;i<array.size();i++)
               {
                   adapter.visiblecheck.put(i, CheckBox.VISIBLE);
               }
               adapter = new Adapter(context,txtcount);
               listview.setAdapter(adapter);
               return true;
           }
       }
   }
}

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