android 对listview数据的增删改查

 

android listview是常用的数据展示控件。其中对数据的增删改查操作也是常用的功能，比如重新获取了新的数据，或者添加，删除某条记录等等更新都需要对listview的数据进行重新的加载。listview更新数据只需要调用到notifyDataSetChanged（）方法，就可以实现对listview数据的更新。如果涉及到线程，则需要在UI的线程更新。

本文针对listview常用的操作进行listview item的数据实行增删改查的操作，主要界面如下。

源码下载：UpdateListView.zip

图-1 android 实现对listview数据的增删改查主要界面

本例只有一个UpdateListViewActivity类，相关的操作以及功能均在一个界面完成。对listview 数据的增删改查，实质就是对填充的数组（填充的数据）进行重新修改后，再次调用notifyDataSetChanged（）方法进行更新。尽管如此，对数据使用起来还是比较生疏，下面的例子能加强对listview数据更新的理解。

UpdateListViewActivity.java类是程序的唯一的一个类，实现了对listview增删改查的操作，代码比较多，但理解并不比较复杂。

1.UpdateListViewActivity.java

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1. package com.updatelistview.main;   
2.   
3. import java.util.ArrayList;   
4. import java.util.HashMap;   
5.   
6. import android.app.Activity;   
7. import android.app.AlertDialog;   
8. import android.content.Context;   
9. import android.content.DialogInterface;   
10. import android.os.Bundle;   
11. import android.view.LayoutInflater;   
12. import android.view.View;   
13. import android.view.View.OnClickListener;   
14. import android.widget.Button;   
15. import android.widget.EditText;   
16. import android.widget.LinearLayout;   
17. import android.widget.ListView;   
18. import android.widget.SimpleAdapter;   
19. import android.widget.Toast;   
20.   
21. public class UpdateListViewActivity extends Activity {   
22.     // 控件   
23.     private Button addBtn;   
24.     private Button deleteBtn;   
25.     private Button editBtn;   
26.     private Button queryBtn;   
27.     private ListView listview;   
28.     // 数组   
29.     private SimpleAdapter listItemAdapter;   
30.     private ArrayList<HASHMAP<STRING, Object>> listItem = null;   
31.   
32.     /** Called when the activity is first created. */  
33.     @Override  
34.     public void onCreate(Bundle savedInstanceState) {   
35.         super.onCreate(savedInstanceState);   
36.         setContentView(R.layout.main);   
37.   
38.         // 获取控件   
39.         addBtn = (Button) findViewById(R.id.add_id);   
40.         deleteBtn = (Button) findViewById(R.id.delete_id);   
41.         editBtn = (Button) findViewById(R.id.edit_id);   
42.         queryBtn = (Button) findViewById(R.id.query_id);   
43.         listview = (ListView) findViewById(R.id.show_result);   
44.   
45.         // 初始化数据   
46.         init();   
47.   
48.         // 设置控件事件监听   
49.         addBtn.setOnClickListener(addClick);   
50.         deleteBtn.setOnClickListener(deleteClick);   
51.         editBtn.setOnClickListener(editClick);   
52.         queryBtn.setOnClickListener(queryClick);   
53.   
54.     }   
55.   
56.     // 添加事件响应   
57.     OnClickListener addClick = new OnClickListener() {   
58.   
59.         @Override  
60.         public void onClick(View v) {   
61.             // TODO Auto-generated method stub   
62.   
63.             // 加载输入框的布局文件   
64.             LayoutInflater inflater = (LayoutInflater) UpdateListViewActivity.this  
65.                     .getSystemService(Context.LAYOUT_INFLATER_SERVICE);   
66.             final LinearLayout layout = (LinearLayout) inflater.inflate(   
67.                     R.layout.input_add, null);   
68.   
69.             // 弹出的对话框   
70.   
71.             new AlertDialog.Builder(UpdateListViewActivity.this)   
72.                     /* 弹出窗口的最上头文字 */  
73.                     .setTitle("添加一条数据")   
74.                     /* 设置弹出窗口的图式 */  
75.                     .setIcon(android.R.drawable.ic_dialog_info)   
76.                     /* 设置弹出窗口的信息 */  
77.                     .setMessage("请输入添加的内容")   
78.                     .setView(layout)   
79.                     .setPositiveButton("确定",   
80.                             new DialogInterface.OnClickListener() {   
81.                                 public void onClick(   
82.                                         DialogInterface dialoginterface, int i) {   
83.   
84.                                     EditText inputStringr = (EditText) layout   
85.                                             .findViewById(R.id.input_add_string);   
86.   
87.                                     String str = inputStringr.getText()   
88.                                             .toString();   
89.   
90.                                     if (str == null || str.equals("")) {   
91.   
92.                                         Toast.makeText(getApplicationContext(),   
93.                                                 "添加的内容不能为空", Toast.LENGTH_SHORT)   
94.                                                 .show();   
95.                                     } else {   
96.                                         HashMap<STRING, Object> map = new HashMap<STRING, Object>();   
97.                                         map.put("viewspot", str);   
98.                                         map.put("add", R.drawable.right);   
99.                                         listItem.add(0, map);   
100.                                         // 如果在前面添加一条数据添加   
101.                                         // listItem.add(map);   
102.                                         listItemAdapter.notifyDataSetChanged();   
103.                                         Toast.makeText(   
104.                                                 UpdateListViewActivity.this,   
105.                                                 "添加的一条数据为:" + str + "",   
106.                                                 Toast.LENGTH_SHORT).show();   
107.   
108.                                     }   
109.   
110.                                 }   
111.                             })   
112.                     .setNegativeButton("取消",   
113.                             new DialogInterface.OnClickListener() { /* 设置跳出窗口的返回事件 */  
114.                                 public void onClick(   
115.                                         DialogInterface dialoginterface, int i) {   
116.                                     Toast.makeText(UpdateListViewActivity.this,   
117.                                             "取消了删除数据", Toast.LENGTH_SHORT)   
118.                                             .show();   
119.   
120.                                 }   
121.                             }).show();   
122.   
123.         }   
124.     };   
125.   
126.     // 删除事件响应   
127.     OnClickListener deleteClick = new OnClickListener() {   
128.   
129.         @Override  
130.         public void onClick(View v) {   
131.             // TODO Auto-generated method stub   
132.   
133.             /**  
134.              * listItem.clear();清空所有数据  
135.              *  
136.              * */  
137.   
138.             /*  
139.              * listItem.clear();  
140.              * listItemAdapter.notifyDataSetChanged();  
141.              */  
142.   
143.             // 加载输入框的布局文件   
144.             LayoutInflater inflater = (LayoutInflater) UpdateListViewActivity.this  
145.                     .getSystemService(Context.LAYOUT_INFLATER_SERVICE);   
146.             final LinearLayout layout = (LinearLayout) inflater.inflate(   
147.                     R.layout.input_delete, null);   
148.   
149.             // 弹出的对话框   
150.   
151.             new AlertDialog.Builder(UpdateListViewActivity.this)   
152.                     /* 弹出窗口的最上头文字 */  
153.                     .setTitle("删除一条数据")   
154.                     /* 设置弹出窗口的图式 */  
155.                     .setIcon(android.R.drawable.ic_dialog_info)   
156.                     /* 设置弹出窗口的信息 */  
157.                     .setMessage("请输入删除的索引")   
158.                     .setView(layout)   
159.                     .setPositiveButton("确定",   
160.                             new DialogInterface.OnClickListener() {   
161.                                 public void onClick(   
162.                                         DialogInterface dialoginterface, int i) {   
163.   
164.                                     EditText inputNumber = (EditText) layout   
165.                                             .findViewById(R.id.input_delete_number);   
166.   
167.                                     String str = inputNumber.getText()   
168.                                             .toString();   
169.   
170.                                     if (str == null || str.equals("")) {   
171.   
172.                                         Toast.makeText(getApplicationContext(),   
173.                                                 "请输入一个数字", Toast.LENGTH_SHORT)   
174.                                                 .show();   
175.                                     } else {   
176.                                         int number = Integer.valueOf(str);   
177.   
178.                                         int size = listItem.size();   
179.   
180.                                         // 判断数字是否超出数组索引范围   
181.                                         if (number >= size) {   
182.                                             Toast.makeText(   
183.                                                     getApplicationContext(),   
184.                                                     "没有找到删除的数据索引",   
185.                                                     Toast.LENGTH_SHORT).show();   
186.   
187.                                         } else {   
188.   
189.                                             String value = listItem.get(number)   
190.                                                     .toString();   
191.                                             listItem.remove(number);   
192.                                             listItemAdapter   
193.                                                     .notifyDataSetChanged();   
194.                                             Toast.makeText(   
195.                                                     UpdateListViewActivity.this,   
196.                                                     "删除的数据为:" + value + "",   
197.                                                     Toast.LENGTH_SHORT).show();   
198.   
199.                                         }   
200.                                     }   
201.   
202.                                 }   
203.                             })   
204.                     .setNegativeButton("取消",   
205.                             new DialogInterface.OnClickListener() { /* 设置跳出窗口的返回事件 */  
206.                                 public void onClick(   
207.                                         DialogInterface dialoginterface, int i) {   
208.                                     Toast.makeText(UpdateListViewActivity.this,   
209.                                             "取消了删除数据", Toast.LENGTH_SHORT)   
210.                                             .show();   
211.   
212.                                 }   
213.                             }).show();   
214.   
215.         }   
216.     };   
217.     // 修改事件响应   
218.     OnClickListener editClick = new OnClickListener() {   
219.   
220.         @Override  
221.         public void onClick(View v) {   
222.             // TODO Auto-generated method stub   
223.             // 加载输入框的布局文件   
224.             LayoutInflater inflater = (LayoutInflater) UpdateListViewActivity.this  
225.                     .getSystemService(Context.LAYOUT_INFLATER_SERVICE);   
226.             final LinearLayout layout = (LinearLayout) inflater.inflate(   
227.                     R.layout.input_edit, null);   
228.   
229.             // 弹出的对话框   
230.   
231.             new AlertDialog.Builder(UpdateListViewActivity.this)   
232.                     /* 弹出窗口的最上头文字 */  
233.                     .setTitle("修改一条数据")   
234.                     /* 设置弹出窗口的图式 */  
235.                     .setIcon(android.R.drawable.ic_dialog_info)   
236.                     /* 设置弹出窗口的信息 */  
237.                     .setMessage("请输入修改的索引及内容")   
238.                     .setView(layout)   
239.                     .setPositiveButton("确定",   
240.                             new DialogInterface.OnClickListener() {   
241.                                 public void onClick(   
242.                                         DialogInterface dialoginterface, int i) {   
243.   
244.                                     EditText inputEditNumber = (EditText) layout   
245.                                             .findViewById(R.id.input_edit_number);   
246.   
247.                                     String numberStr = inputEditNumber   
248.                                             .getText().toString();   
249.   
250.                                     EditText inputEditString = (EditText) layout   
251.                                             .findViewById(R.id.input_edit_string);   
252.   
253.                                     String editStr = inputEditString.getText()   
254.                                             .toString();   
255.   
256.                                     if (numberStr == null  
257.                                             || numberStr.equals("")) {   
258.   
259.                                         Toast.makeText(getApplicationContext(),   
260.                                                 "请输入要修改的索引", Toast.LENGTH_SHORT)   
261.                                                 .show();   
262.                                     } else {   
263.                                         int number = Integer.valueOf(numberStr);   
264.   
265.                                         int size = listItem.size();   
266.   
267.                                         // 判断数字是否超出数组索引范围   
268.                                         if (number >= size) {   
269.                                             Toast.makeText(   
270.                                                     getApplicationContext(),   
271.                                                     "没有找到修改的数据索引",   
272.                                                     Toast.LENGTH_SHORT).show();   
273.   
274.                                         } else {   
275.   
276.                                             HashMap<STRING, Object> map = new HashMap<STRING, Object>();   
277.                                             map.put("viewspot", editStr);   
278.                                             map.put("add", R.drawable.right);   
279.   
280.                                             listItem.set(number, map);   
281.                                             listItemAdapter   
282.                                                     .notifyDataSetChanged();   
283.   
284.                                             Toast.makeText(   
285.                                                     UpdateListViewActivity.this,   
286.                                                     "数据修改为:" + editStr + "",   
287.                                                     Toast.LENGTH_SHORT).show();   
288.   
289.                                         }   
290.                                     }   
291.   
292.                                 }   
293.                             })   
294.                     .setNegativeButton("取消",   
295.                             new DialogInterface.OnClickListener() { /* 设置跳出窗口的返回事件 */  
296.                                 public void onClick(   
297.                                         DialogInterface dialoginterface, int i) {   
298.                                     Toast.makeText(UpdateListViewActivity.this,   
299.                                             "取消了修改数据", Toast.LENGTH_SHORT)   
300.                                             .show();   
301.   
302.                                 }   
303.                             }).show();   
304.   
305.         }   
306.     };   
307.   
308.     // 查询事件响应   
309.     OnClickListener queryClick = new OnClickListener() {   
310.   
311.         @Override  
312.         public void onClick(View v) {   
313.             // TODO Auto-generated method stub   
314.             // 查询数据   
315.             listItemAdapter.notifyDataSetChanged();   
316.         }   
317.     };   
318.   
319.     // 初始化数据   
320.     private void init() {   
321.   
322.         listItem = new ArrayList<HASHMAP<STRING, Object>>();   
323.         for (int i = 0; i < 12; i++) {   
324.             HashMap<STRING, Object> map = new HashMap<STRING, Object>();   
325.             map.put("viewspot", "北京故宫，颐和园" + i);   
326.             map.put("add", R.drawable.right);   
327.             listItem.add(map);   
328.         }   
329.         listItemAdapter = new SimpleAdapter(getApplicationContext(), listItem,// 数据源   
330.                 R.layout.items, new String[] { "viewspot", "add" }, new int[] {   
331.                         R.id.viewspot, R.id.add });   
332.         listview.setAdapter(listItemAdapter);   
333.   
334.     }   
335.   
336. }  

package com.updatelistview.main;

import java.util.ArrayList;
import java.util.HashMap;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;

public class UpdateListViewActivity extends Activity {
	// 控件
	private Button addBtn;
	private Button deleteBtn;
	private Button editBtn;
	private Button queryBtn;
	private ListView listview;
	// 数组
	private SimpleAdapter listItemAdapter;
	private ArrayList
  
  
   
   
    
    > listItem = null;

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		// 获取控件
		addBtn = (Button) findViewById(R.id.add_id);
		deleteBtn = (Button) findViewById(R.id.delete_id);
		editBtn = (Button) findViewById(R.id.edit_id);
		queryBtn = (Button) findViewById(R.id.query_id);
		listview = (ListView) findViewById(R.id.show_result);

		// 初始化数据
		init();

		// 设置控件事件监听
		addBtn.setOnClickListener(addClick);
		deleteBtn.setOnClickListener(deleteClick);
		editBtn.setOnClickListener(editClick);
		queryBtn.setOnClickListener(queryClick);

	}

	// 添加事件响应
	OnClickListener addClick = new OnClickListener() {

		@Override
		public void onClick(View v) {
			// TODO Auto-generated method stub

			// 加载输入框的布局文件
			LayoutInflater inflater = (LayoutInflater) UpdateListViewActivity.this
					.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
			final LinearLayout layout = (LinearLayout) inflater.inflate(
					R.layout.input_add, null);

			// 弹出的对话框

			new AlertDialog.Builder(UpdateListViewActivity.this)
					/* 弹出窗口的最上头文字 */
					.setTitle("添加一条数据")
					/* 设置弹出窗口的图式 */
					.setIcon(android.R.drawable.ic_dialog_info)
					/* 设置弹出窗口的信息 */
					.setMessage("请输入添加的内容")
					.setView(layout)
					.setPositiveButton("确定",
							new DialogInterface.OnClickListener() {
								public void onClick(
										DialogInterface dialoginterface, int i) {

									EditText inputStringr = (EditText) layout
											.findViewById(R.id.input_add_string);

									String str = inputStringr.getText()
											.toString();

									if (str == null || str.equals("")) {

										Toast.makeText(getApplicationContext(),
												"添加的内容不能为空", Toast.LENGTH_SHORT)
												.show();
									} else {
										HashMap
    
    
     
      map = new HashMap
     
     
      
      ();
										map.put("viewspot", str);
										map.put("add", R.drawable.right);
										listItem.add(0, map);
										// 如果在前面添加一条数据添加
										// listItem.add(map);
										listItemAdapter.notifyDataSetChanged();
										Toast.makeText(
												UpdateListViewActivity.this,
												"添加的一条数据为:" + str + "",
												Toast.LENGTH_SHORT).show();

									}

								}
							})
					.setNegativeButton("取消",
							new DialogInterface.OnClickListener() { /* 设置跳出窗口的返回事件 */
								public void onClick(
										DialogInterface dialoginterface, int i) {
									Toast.makeText(UpdateListViewActivity.this,
											"取消了删除数据", Toast.LENGTH_SHORT)
											.show();

								}
							}).show();

		}
	};

	// 删除事件响应
	OnClickListener deleteClick = new OnClickListener() {

		@Override
		public void onClick(View v) {
			// TODO Auto-generated method stub

			/**
			 * listItem.clear();清空所有数据
			 *
			 * */

			/*
			 * listItem.clear();
			 * listItemAdapter.notifyDataSetChanged();
			 */

			// 加载输入框的布局文件
			LayoutInflater inflater = (LayoutInflater) UpdateListViewActivity.this
					.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
			final LinearLayout layout = (LinearLayout) inflater.inflate(
					R.layout.input_delete, null);

			// 弹出的对话框

			new AlertDialog.Builder(UpdateListViewActivity.this)
					/* 弹出窗口的最上头文字 */
					.setTitle("删除一条数据")
					/* 设置弹出窗口的图式 */
					.setIcon(android.R.drawable.ic_dialog_info)
					/* 设置弹出窗口的信息 */
					.setMessage("请输入删除的索引")
					.setView(layout)
					.setPositiveButton("确定",
							new DialogInterface.OnClickListener() {
								public void onClick(
										DialogInterface dialoginterface, int i) {

									EditText inputNumber = (EditText) layout
											.findViewById(R.id.input_delete_number);

									String str = inputNumber.getText()
											.toString();

									if (str == null || str.equals("")) {

										Toast.makeText(getApplicationContext(),
												"请输入一个数字", Toast.LENGTH_SHORT)
												.show();
									} else {
										int number = Integer.valueOf(str);

										int size = listItem.size();

										// 判断数字是否超出数组索引范围
										if (number >= size) {
											Toast.makeText(
													getApplicationContext(),
													"没有找到删除的数据索引",
													Toast.LENGTH_SHORT).show();

										} else {

											String value = listItem.get(number)
													.toString();
											listItem.remove(number);
											listItemAdapter
													.notifyDataSetChanged();
											Toast.makeText(
													UpdateListViewActivity.this,
													"删除的数据为:" + value + "",
													Toast.LENGTH_SHORT).show();

										}
									}

								}
							})
					.setNegativeButton("取消",
							new DialogInterface.OnClickListener() { /* 设置跳出窗口的返回事件 */
								public void onClick(
										DialogInterface dialoginterface, int i) {
									Toast.makeText(UpdateListViewActivity.this,
											"取消了删除数据", Toast.LENGTH_SHORT)
											.show();

								}
							}).show();

		}
	};
	// 修改事件响应
	OnClickListener editClick = new OnClickListener() {

		@Override
		public void onClick(View v) {
			// TODO Auto-generated method stub
			// 加载输入框的布局文件
			LayoutInflater inflater = (LayoutInflater) UpdateListViewActivity.this
					.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
			final LinearLayout layout = (LinearLayout) inflater.inflate(
					R.layout.input_edit, null);

			// 弹出的对话框

			new AlertDialog.Builder(UpdateListViewActivity.this)
					/* 弹出窗口的最上头文字 */
					.setTitle("修改一条数据")
					/* 设置弹出窗口的图式 */
					.setIcon(android.R.drawable.ic_dialog_info)
					/* 设置弹出窗口的信息 */
					.setMessage("请输入修改的索引及内容")
					.setView(layout)
					.setPositiveButton("确定",
							new DialogInterface.OnClickListener() {
								public void onClick(
										DialogInterface dialoginterface, int i) {

									EditText inputEditNumber = (EditText) layout
											.findViewById(R.id.input_edit_number);

									String numberStr = inputEditNumber
											.getText().toString();

									EditText inputEditString = (EditText) layout
											.findViewById(R.id.input_edit_string);

									String editStr = inputEditString.getText()
											.toString();

									if (numberStr == null
											|| numberStr.equals("")) {

										Toast.makeText(getApplicationContext(),
												"请输入要修改的索引", Toast.LENGTH_SHORT)
												.show();
									} else {
										int number = Integer.valueOf(numberStr);

										int size = listItem.size();

										// 判断数字是否超出数组索引范围
										if (number >= size) {
											Toast.makeText(
													getApplicationContext(),
													"没有找到修改的数据索引",
													Toast.LENGTH_SHORT).show();

										} else {

											HashMap
      
      
        map = new HashMap 
       
         (); map.put("viewspot", editStr); map.put("add", R.drawable.right); listItem.set(number, map); listItemAdapter .notifyDataSetChanged(); Toast.makeText( UpdateListViewActivity.this, "数据修改为:" + editStr + "", Toast.LENGTH_SHORT).show(); } } } }) .setNegativeButton("取消", new DialogInterface.OnClickListener() { /* 设置跳出窗口的返回事件 */ public void onClick( DialogInterface dialoginterface, int i) { Toast.makeText(UpdateListViewActivity.this, "取消了修改数据", Toast.LENGTH_SHORT) .show(); } }).show(); } }; // 查询事件响应 OnClickListener queryClick = new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub // 查询数据 listItemAdapter.notifyDataSetChanged(); } }; // 初始化数据 private void init() { listItem = new ArrayList 
         
         
           >(); for (int i = 0; i < 12; i++) { HashMap 
          
            map = new HashMap 
           
             (); map.put("viewspot", "北京故宫，颐和园" + i); map.put("add", R.drawable.right); listItem.add(map); } listItemAdapter = new SimpleAdapter(getApplicationContext(), listItem,// 数据源 R.layout.items, new String[] { "viewspot", "add" }, new int[] { R.id.viewspot, R.id.add }); listview.setAdapter(listItemAdapter); } } 
            
           
          
         
         
        
      
     
     
    
    
   
   
  
  
  
  

main.xml是主要的布局界面，也是UpdateListViewActivity加载的布局文件。

2.main.xml（主要界面）

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1. <?xml version="1.0" encoding="utf-8"?>  
2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
3. android:orientation="vertical"  
4. android:layout_width="fill_parent"  
5. android:layout_height="wrap_content">  
6. <Button android:layout_width="fill_parent" android:text="添加数据" android:layout_height="wrap_content" android:id="@+id/add_id"></Button>  
7. <Button android:layout_width="fill_parent" android:text="删除数据" android:layout_height="wrap_content" android:id="@+id/delete_id"></Button>  
8. <Button android:layout_width="fill_parent" android:text="修改数据" android:layout_height="wrap_content" android:id="@+id/edit_id"></Button>  
9. <Button android:layout_width="fill_parent" android:text="查询数据" android:layout_height="wrap_content" android:id="@+id/query_id"></Button>  
10.   
11. <ListView android:layout_width="fill_parent"  
12. android:layout_height="wrap_content"  
13. android:id="@+id/show_result"  
14. >  
15. </ListView>  
16. </LinearLayout>  

<?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="wrap_content">
<Button android:layout_width="fill_parent" android:text="添加数据" android:layout_height="wrap_content" android:id="@+id/add_id"></Button>
<Button android:layout_width="fill_parent" android:text="删除数据" android:layout_height="wrap_content" android:id="@+id/delete_id"></Button>
<Button android:layout_width="fill_parent" android:text="修改数据" android:layout_height="wrap_content" android:id="@+id/edit_id"></Button>
<Button android:layout_width="fill_parent" android:text="查询数据" android:layout_height="wrap_content" android:id="@+id/query_id"></Button>

<ListView android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/show_result"
>
</ListView>
</LinearLayout>

items.xml是listview加载的数据选项布局文件

3.items.xml（listview item 内容填充布局）

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1. <?xml version="1.0" encoding="utf-8"?>  
2. <LinearLayout  
3. xmlns:android="http://schemas.android.com/apk/res/android"  
4. android:layout_width="fill_parent"  
5. android:layout_height="wrap_content">  
6. <TextView android:layout_width="fill_parent"  
7. android:layout_height="wrap_content"  
8. android:id="@+id/viewspot"  
9. android:padding="6dip"  
10. android:layout_weight="1"  
11. android:textColor="#cceecc">  
12. </TextView>  
13.   
14. <ImageView android:layout_width="100dip"  
15. android:layout_height="wrap_content"  
16. android:id="@+id/add"  
17. android:padding="10dip"  
18. android:src="@drawable/right"></ImageView>  
19.   
20. </LinearLayout>  

<?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">
<TextView android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/viewspot"
android:padding="6dip"
android:layout_weight="1"
android:textColor="#cceecc">
</TextView>

<ImageView android:layout_width="100dip"
android:layout_height="wrap_content"
android:id="@+id/add"
android:padding="10dip"
android:src="@drawable/right"></ImageView>

</LinearLayout>

input_add.xml是点击“添加数据”按钮时弹出AlertDialog对话框时加载的输入框布局文件

4.input_add.xml（弹出的添加界面）

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1. <?xml version="1.0" encoding="utf-8"?>  
2. <LinearLayout  
3. xmlns:android="http://schemas.android.com/apk/res/android"  
4. android:layout_width="fill_parent"  
5. android:layout_height="fill_parent">  
6. <EditText android:layout_width="fill_parent"  
7. android:layout_height="wrap_content"  
8. android:id="@+id/input_add_string"  
9. android:singleLine="true"></EditText>  
10. </LinearLayout>  

<?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">
<EditText android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/input_add_string"
android:singleLine="true"></EditText>
</LinearLayout>

input_delete.xml是点击“删除数据”按钮时弹出AlertDialog对话框时加载的输入删除索引的布局文件

5.input_delete.xml（弹出的删除界面）

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1. <?xml version="1.0" encoding="utf-8"?>  
2. <LinearLayout  
3. xmlns:android="http://schemas.android.com/apk/res/android"  
4. android:layout_width="fill_parent"  
5. android:layout_height="fill_parent">  
6. <EditText android:layout_width="fill_parent"  
7. android:layout_height="wrap_content"  
8. android:id="@+id/input_delete_number"  
9. android:singleLine="true"  
10. android:digits="0123456789"></EditText>  
11. </LinearLayout>  

<?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">
<EditText android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/input_delete_number"
android:singleLine="true"
android:digits="0123456789"></EditText>
</LinearLayout>

input_edit.xml删除数据的布局文件

6.input_edit.xml（弹出的编辑界面）

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1. <?xml version="1.0" encoding="utf-8"?>  
2. <LinearLayout  
3. xmlns:android="http://schemas.android.com/apk/res/android"  
4. android:layout_width="fill_parent"  
5. android:layout_height="fill_parent"  
6. android:orientation="vertical">  
7. <TextView android:layout_width="fill_parent"  
8. android:layout_height="wrap_content"  
9. android:text="输入要修改的索引"></TextView>  
10. <EditText android:layout_width="fill_parent"  
11. android:layout_height="wrap_content"  
12. android:id="@+id/input_edit_number"  
13. android:singleLine="true"  
14. android:digits="0123456789"></EditText>  
15. <TextView android:layout_width="fill_parent"  
16. android:layout_height="wrap_content"  
17. android:text="内容修改为"></TextView>  
18. <EditText android:layout_width="fill_parent"  
19. android:layout_height="wrap_content"  
20. android:id="@+id/input_edit_string"  
21. android:singleLine="true"></EditText>  
22. </LinearLayout>  

<?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="vertical">
<TextView android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="输入要修改的索引"></TextView>
<EditText android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/input_edit_number"
android:singleLine="true"
android:digits="0123456789"></EditText>
<TextView android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="内容修改为"></TextView>
<EditText android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/input_edit_string"
android:singleLine="true"></EditText>
</LinearLayout>

编辑的界面如图-2