安卓开发之生成XML文件

 1 package com.lidaochen.phonecall;
 2 
 3 import android.net.Uri;
 4 import android.os.Environment;
 5 import android.support.v7.app.AppCompatActivity;
 6 import android.os.Bundle;
 7 import android.util.Log;
 8 import android.view.View;
 9 import android.widget.Button;
10 import android.widget.TabHost;
11 import android.widget.ThemedSpinnerAdapter;
12 import android.widget.Toast;
13 
14 import java.io.File;
15 import java.io.FileOutputStream;
16 import java.util.ArrayList;
17 import java.util.List;
18 import java.util.Map;
19 
20 public class MainActivity extends AppCompatActivity{
21     private List<Sms> smsLists;
22     @Override
23     protected void onCreate(Bundle savedInstanceState) {
24         super.onCreate(savedInstanceState);
25         setContentView(R.layout.activity_main);
26         // 初始化我们要备份的数据
27         smsLists = new ArrayList<Sms>();
28         for (int i = 0; i < 10; i++)
29         {
30             Sms sms = new Sms();
31             sms.setAddres("10000" + i);
32             sms.setBody("Hello" + i);
33             sms.setDate("500" + i);
34             // 把sms对象加入到集合中
35             smsLists.add(sms);
36         }
37     }
38     // 按钮点击事件
39     public void click(View v)
40     {
41         // 创建sb对象
42         StringBuffer sb = new StringBuffer();
43         // 开始拼接XML文件
44         sb.append("<?xml version=\"1.0\" encoding=\"utf-8\"?>");
45         sb.append("<Sms>");
46         // 开始组拼sms节点
47         for (Sms sms:smsLists )
48         {
49             sb.append("<sms>");
50 
51             sb.append("<Addres>");
52             sb.append(sms.getAddres());
53             sb.append("</Addres>");
54 
55             sb.append("<body>");
56             sb.append(sms.getBody());
57             sb.append("</body>");
58 
59             sb.append("<date>");
60             sb.append(sms.getDate());
61             sb.append("</date>");
62 
63             sb.append("</sms>");
64         }
65         sb.append("</Sms>");
66         // 保存数据到SD卡
67         if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState()))
68         {
69             try{
70                 // 创建FILE类指定我们要保存的位置
71                 File file = new File(Environment.getExternalStorageDirectory().getPath(), "HelloWorld.xml");
72                 FileOutputStream fos = new FileOutputStream(file);
73                 fos.write(sb.toString().getBytes());
74                 fos.close();
75             }
76             catch (Exception e)
77             {
78                 e.printStackTrace();
79             }
80         }
81         else
82         {
83             Toast.makeText(MainActivity.this, "SD卡不可用！", Toast.LENGTH_SHORT).show();
84         }
85     }
86 }

 1 package com.lidaochen.phonecall;
 2 
 3 public class Sms {
 4     private String addres;
 5     private String body;
 6     private String date;
 7 
 8     public String getAddres() {
 9         return addres;
10     }
11 
12     public String getBody() {
13         return body;
14     }
15 
16     public String getDate() {
17         return date;
18     }
19 
20     public void setAddres(String addres) {
21         this.addres = addres;
22     }
23 
24     public void setBody(String body) {
25         this.body = body;
26     }
27 
28     public void setDate(String date) {
29         this.date = date;
30     }
31 }

安卓开发之生成XML文件

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