当前位置： 移动技术网 > IT编程>移动开发>Android > Android checkbox的listView具体操作方法

Android checkbox的listView具体操作方法

2019年07月24日  | 移动技术网IT编程  | 我要评论

十秒到米线,网球宝贝官网,设备完好标准

本文主要实现在自定义的listview布局中加入checkbox控件，通过判断用户是否选中checkbox来对listview的选中项进行相应的操作。通过一个demo来展示该功能，选中listview中的某一项，然后点击button按钮来显示选中了哪些项。
1、程序结构图如下：

其中person.java是实体类，mainactivity.java是activity组件类。listitem.xml是自定义的列表每项布局文件。
2、listitem.xml布局文件源码如下：

<?xml version="1.0" encoding="utf-8"?> 
<linearlayout 
 xmlns:android="http://schemas.android.com/apk/res/android" 
 android:orientation="vertical" 
 android:layout_width="fill_parent" 
 android:layout_height="fill_parent"> 
 <linearlayout 
  android:layout_width="fill_parent" 
  android:layout_height="wrap_content" 
  android:orientation="horizontal" 
  android:descendantfocusability="blocksdescendants"> 
  <checkbox 
   android:id="@+id/list.select" 
   android:layout_width="wrap_content" 
   android:layout_height="wrap_content"/> 
  <textview 
   android:id="@+id/list.name" 
   android:layout_width="fill_parent" 
   android:layout_height="wrap_content" 
   android:layout_weight="1" 
   android:text="name" 
   android:layout_gravity="center" 
   android:textsize="20dp" 
   android:layout_marginleft="10dp"/> 
  <textview 
   android:id="@+id/list.address" 
   android:layout_width="fill_parent" 
   android:layout_height="wrap_content" 
   android:layout_weight="1" 
   android:text="address" 
   android:layout_gravity="center" 
   android:textsize="20dp"/> 
 </linearlayout> 
</linearlayout>

3、 main.xml布局文件源码如下：

<?xml version="1.0" encoding="utf-8"?> 
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android" 
 android:orientation="vertical" 
 android:layout_width="fill_parent" 
 android:layout_height="fill_parent"> 
 <button 
  android:id="@+id/show" 
  android:layout_width="fill_parent" 
  android:layout_height="wrap_content" 
  android:text="show"/> 
 <listview 
  android:id="@+id/lvperson" 
  android:layout_width="fill_parent" 
  android:layout_height="fill_parent"/> 
</linearlayout>

4、person.java实体类源码如下：

package com.andyidea.bean; 
 
public class person { 
 
 private string name; 
 private string address; 
  
 public string getname() { 
  return name; 
 } 
 public void setname(string name) { 
  this.name = name; 
 } 
 public string getaddress() { 
  return address; 
 } 
 public void setaddress(string address) { 
  this.address = address; 
 } 
  
}

5、mainactivity.java类源码如下：

package com.andyidea.listview; 
 
import java.util.arraylist; 
import java.util.hashmap; 
import java.util.list; 
 
import com.andyidea.bean.person; 
 
import android.app.activity; 
import android.app.alertdialog; 
import android.content.context; 
import android.os.bundle; 
import android.util.log; 
import android.view.layoutinflater; 
import android.view.view; 
import android.view.viewgroup; 
import android.widget.baseadapter; 
import android.widget.button; 
import android.widget.checkbox; 
import android.widget.listview; 
import android.widget.textview; 
 
public class mainactivity extends activity { 
  
 button show; 
 listview lv; 
 list<person> persons = new arraylist<person>(); 
 context mcontext; 
 mylistadapter adapter; 
 list<integer> listitemid = new arraylist<integer>(); 
  
 /** called when the activity is first created. */ 
 @override 
 public void oncreate(bundle savedinstancestate) { 
  super.oncreate(savedinstancestate); 
  setcontentview(r.layout.main); 
  mcontext = getapplicationcontext(); 
  show = (button)findviewbyid(r.id.show); 
  lv = (listview)findviewbyid(r.id.lvperson); 
   
  initpersondata(); 
  adapter = new mylistadapter(persons); 
  lv.setadapter(adapter); 
   
  show.setonclicklistener(new view.onclicklistener() { 
 
   @override 
   public void onclick(view v) { 
     
    listitemid.clear(); 
    for(int i=0;i<adapter.mchecked.size();i++){ 
     if(adapter.mchecked.get(i)){ 
      listitemid.add(i); 
     } 
    } 
     
    if(listitemid.size()==0){ 
     alertdialog.builder builder1 = new alertdialog.builder(mainactivity.this); 
     builder1.setmessage("没有选中任何记录"); 
     builder1.show(); 
    }else{ 
     stringbuilder sb = new stringbuilder(); 
      
     for(int i=0;i<listitemid.size();i++){ 
      sb.append("itemid="+listitemid.get(i)+" . "); 
     } 
     alertdialog.builder builder2 = new alertdialog.builder(mainactivity.this); 
     builder2.setmessage(sb.tostring()); 
     builder2.show(); 
    } 
   } 
  }); 
 } 
  
 /** 
  * 模拟数据 
  */ 
 private void initpersondata(){ 
  person mperson; 
  for(int i=1;i<=12;i++){ 
   mperson = new person(); 
   mperson.setname("andy"+i); 
   mperson.setaddress("guangzhou"+i); 
   persons.add(mperson); 
  } 
 } 
  
 //自定义listview适配器 
 class mylistadapter extends baseadapter{ 
  list<boolean> mchecked; 
  list<person> listperson; 
  hashmap<integer,view> map = new hashmap<integer,view>(); 
   
  public mylistadapter(list<person> list){ 
   listperson = new arraylist<person>(); 
   listperson = list; 
    
   mchecked = new arraylist<boolean>(); 
   for(int i=0;i<list.size();i++){ 
    mchecked.add(false); 
   } 
  } 
 
  @override 
  public int getcount() { 
   return listperson.size(); 
  } 
 
  @override 
  public object getitem(int position) { 
   return listperson.get(position); 
  } 
 
  @override 
  public long getitemid(int position) { 
   return position; 
  } 
 
  @override 
  public view getview(int position, view convertview, viewgroup parent) { 
   view view; 
   viewholder holder = null; 
    
   if (map.get(position) == null) { 
    log.e("mainactivity","position1 = "+position); 
     
    layoutinflater minflater = (layoutinflater) mcontext 
      .getsystemservice(context.layout_inflater_service); 
    view = minflater.inflate(r.layout.listitem, null); 
    holder = new viewholder(); 
    holder.selected = (checkbox)view.findviewbyid(r.id.list_select); 
    holder.name = (textview)view.findviewbyid(r.id.list_name); 
    holder.address = (textview)view.findviewbyid(r.id.list_address); 
    final int p = position; 
    map.put(position, view); 
    holder.selected.setonclicklistener(new view.onclicklistener() { 
      
     @override 
     public void onclick(view v) { 
      checkbox cb = (checkbox)v; 
      mchecked.set(p, cb.ischecked()); 
     } 
    }); 
    view.settag(holder); 
   }else{ 
    log.e("mainactivity","position2 = "+position); 
    view = map.get(position); 
    holder = (viewholder)view.gettag(); 
   } 
    
   holder.selected.setchecked(mchecked.get(position)); 
   holder.name.settext(listperson.get(position).getname()); 
   holder.address.settext(listperson.get(position).getaddress()); 
    
   return view; 
  } 
   
 } 
  
 static class viewholder{ 
  checkbox selected; 
  textview name; 
  textview address; 
 } 
}

程序运行后的结果如下：

希望本文所述对大家学习android软件编程有所帮助。

您可能感兴趣的文章:

如对本文有疑问，请在下面进行留言讨论，广大热心网友会与你互动！！ 点击进行留言回复

相关文章:

验证码：
最近更新的文章
大家感兴趣的文章
移动技术网