android ListView内数据的动态添加与删除实例代码

概述main.xml文件： 复制代码代码如下:<?xmlversion=\"1.0\"encoding=\"utf-8\"?> <LinearLayoutxmlns:android=\"http://schemas.android.com/apk/res/android\" 

main.xml 文件： 

复制代码 代码如下:

<?xml version="1.0" enCoding="utf-8"?> 

<linearLayout xmlns:androID="http://schemas.androID.com/apk/res/androID" 

     androID:layout_wIDth="fill_parent" 

     androID:layout_height="fill_parent" 

     androID:orIEntation="horizontal"  

     > 

     <linearLayout 

       androID:layout_wIDth="fill_parent" 

      androID:layout_height="fill_parent"    

      androID:orIEntation="vertical" 

      > 

     <ListVIEw  

      androID:ID="@+ID/ListvIEw"     

      androID:layout_wIDth="fill_parent" 

      androID:layout_height="wrap_content" 

     /> 

     <button  

      androID:ID="@+ID/add"     

      androID:layout_wIDth="wrap_content" 

      androID:layout_height="wrap_content"  

      androID:text="添加" 

      /> 

     </linearLayout> 

 </linearLayout>

ListvIEw_item.xml文件：
复制代码 代码如下:
 <?xml version="1.0" enCoding="utf-8"?> 

 <linearLayout xmlns:androID="http://schemas.androID.com/apk/res/androID" 

     androID:layout_wIDth="fill_parent" 

     androID:layout_height="wrap_content" 

     androID:orIEntation="horizontal" 

     androID:background="#000000" 

     androID:padding="20dp" 

     > 

        

     <EditText 

     androID:ID="@+ID/edit" 

     androID:layout_wIDth="200dp" 

     androID:layout_height="wrap_content" 

     /> 

     <button 

     androID:ID="@+ID/del" 

     androID:layout_wIDth="wrap_content" 

     androID:layout_height="wrap_content"    

     androID:text="删除" 

     /> 

        

 </linearLayout>

MainActivity .java
复制代码 代码如下:
 package com.yyy.testandroID; 

    
import java.util.ArrayList; 
    

import androID.app.Activity; 

import androID.content.Context; 

import androID.os.Bundle; 

import androID.vIEw.LayoutInflater; 

import androID.vIEw.VIEw; 

import androID.vIEw.VIEw.OnClickListener; 

import androID.vIEw.VIEw.OnFocuschangelistener; 

import androID.vIEw.VIEwGroup; 

 import androID.Widget.BaseAdapter; 

 import androID.Widget.button; 

 import androID.Widget.EditText; 

 import androID.Widget.ListVIEw; 

 import androID.Widget.TextVIEw; 

    

 public class TestAndroIDActivity extends Activity { 

     /** Called when the activity is first created. */ 

        

     private button button,add; 

     private TextVIEw text; 

     private ListVIEw ListvIEw; 

     public MyAdapter adapter; 

     @OverrIDe 

     public voID onCreate(Bundle savedInstanceState) { 

         super.onCreate(savedInstanceState); 

         setContentVIEw(R.layout.main); 

         ListvIEw = (ListVIEw) findVIEwByID(R.ID.ListvIEw); 

         add = (button) findVIEwByID(R.ID.add); 

         adapter = new MyAdapter(this); 

         ListvIEw.setAdapter(adapter); 

            

         add.setonClickListener(new OnClickListener() { 

             @OverrIDe 

             public voID onClick(VIEw arg0) { 

                 // Todo auto-generated method stub 

                 adapter.arr.add(""); 

                 adapter.notifyDataSetChanged(); 

             } 

         }); 

     } 
 

     private class MyAdapter extends BaseAdapter { 

    

         private Context context; 

         private LayoutInflater inflater; 

         public ArrayList<String> arr; 

         public MyAdapter(Context context) { 

             super(); 

             this.context = context; 

             inflater = LayoutInflater.from(context); 

             arr = new ArrayList<String>(); 

             for(int i=0;i<3;i++){    //ListvIEw初始化3个子项 

                 arr.add(""); 

             } 

         } 

         @OverrIDe 

         public int getCount() { 

             // Todo auto-generated method stub 

             return arr.size(); 

         } 

         @OverrIDe 

         public Object getItem(int arg0) { 

             // Todo auto-generated method stub 

             return arg0; 

         } 

         @OverrIDe 

         public long getItemID(int arg0) { 

             // Todo auto-generated method stub 

             return arg0; 

         } 

         @OverrIDe 

         public VIEw getVIEw(final int position,VIEw vIEw,VIEwGroup arg2) { 

             // Todo auto-generated method stub 

             if(vIEw == null){ 

                 vIEw = inflater.inflate(R.layout.List_item,null); 

             } 

             final EditText edit = (EditText) vIEw.findVIEwByID(R.ID.edit); 

             edit.setText(arr.get(position));    //在重构adapter的时候不至于数据错乱 

             button del = (button) vIEw.findVIEwByID(R.ID.del); 

             edit.setonFocuschangelistener(new OnFocuschangelistener() { 

                 @OverrIDe 

                 public voID onFocusChange(VIEw v,boolean hasFocus) { 

                     // Todo auto-generated method stub 

                     if(arr.size()>0){ 

                         arr.set(position,edit.getText().toString()); 

                     } 

                 } 

             }); 

             del.setonClickListener(new OnClickListener() { 

                 @OverrIDe 

                 public voID onClick(VIEw arg0) { 

                     // Todo auto-generated method stub 

                     //从集合中删除所删除项的EditText的内容 

                     arr.remove(position); 

                     adapter.notifyDataSetChanged(); 

                 } 

             }); 

             return vIEw; 

         } 

     } 

 }

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