把界面内容解析成XML（用DOM模式）

第一步，修改AndroidManifest.xml，添加sdcara写入权限

 1 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
 2
 3     <application
 4         android:allowBackup="true"
 5         android:icon="@drawable/ic_launcher"
 6         android:label="@string/app_name"
 7         android:theme="@style/AppTheme" >
 8         <activity
 9             android:name="com.example.androidfilestream04.MainActivity"
10             android:label="@string/app_name" >
11             <intent-filter>
12                 <action android:name="android.intent.action.MAIN" />
13
14                 <category android:name="android.intent.category.LAUNCHER" />
15             </intent-filter>
16         </activity>
17     </application>

第二步，写layout,编写界面

 1 <TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     xmlns:tools="http://schemas.android.com/tools"
 3     android:id="@+id/TableLayout1"
 4     android:layout_width="match_parent"
 5     android:layout_height="match_parent" >
 6
 7     <TableRow>
 8
 9         <TextView
10             android:layout_width="wrap_content"
11             android:layout_height="wrap_content"
12             android:text="姓名" />
13
14         <EditText
15             android:id="@+id/name"
16             android:layout_width="wrap_content"
17             android:layout_height="wrap_content" />
18     </TableRow>
19
20     <TableRow>
21
22         <TextView
23             android:layout_width="wrap_content"
24             android:layout_height="wrap_content"
25             android:text="邮箱" />
26
27         <EditText
28             android:id="@+id/email"
29             android:layout_width="wrap_content"
30             android:layout_height="wrap_content" />
31     </TableRow>
32
33     <TableRow>
34
35         <Button
36             android:id="@+id/but"
37             android:layout_width="wrap_content"
38             android:layout_height="wrap_content"
39             android:text="提交" />
40     </TableRow>
41
42 </TableLayout>

第三部，编写Activity,进行数据解析

  1 package com.example.androidfilestream04;
  2
  3 import java.io.File;
  4 import java.io.StringWriter;
  5
  6 import javax.xml.parsers.DocumentBuilder;
  7 import javax.xml.parsers.DocumentBuilderFactory;
  8 import javax.xml.parsers.ParserConfigurationException;
  9 import javax.xml.transform.OutputKeys;
 10 import javax.xml.transform.Result;
 11 import javax.xml.transform.Source;
 12 import javax.xml.transform.Transformer;
 13 import javax.xml.transform.TransformerConfigurationException;
 14 import javax.xml.transform.TransformerException;
 15 import javax.xml.transform.TransformerFactory;
 16 import javax.xml.transform.dom.DOMSource;
 17 import javax.xml.transform.stream.StreamResult;
 18
 19 import org.w3c.dom.Document;
 20 import org.w3c.dom.Element;
 21
 22 import android.os.Bundle;
 23 import android.os.Environment;
 24
 25 import android.app.Activity;
 26 import android.view.Menu;
 27 import android.view.View;
 28 import android.view.View.OnClickListener;
 29 import android.widget.Button;
 30 import android.widget.EditText;
 31
 32 public class MainActivity extends Activity {
 33     private EditText name;
 34     private EditText email;
 35     private Button but = null;
 36
 37     @Override
 38     protected void onCreate(Bundle savedInstanceState) {
 39         super.onCreate(savedInstanceState);
 40         setContentView(R.layout.activity_main);
 41         this.name = (EditText) super.findViewById(R.id.name);
 42         this.email = (EditText) super.findViewById(R.id.email);
 43         this.but = (Button) super.findViewById(R.id.but);
 44         this.but.setOnClickListener(new OnClickListenerImpl());
 45     }
 46
 47     private class OnClickListenerImpl implements OnClickListener {
 48
 49         @Override
 50         public void onClick(View v) {
 51             if (!Environment.MEDIA_MOUNTED.equals(Environment
 52                     .getExternalStorageState())) {
 53                 return;
 54             }
 55             // 文件存在地址
 56             File file = new File(Environment.getExternalStorageDirectory()
 57                     + File.separator + "neusoft" + File.separator
 58                     + "member1.xml");
 59             // 判断路径是否不存在，若不存在则创建
 60             if (!file.getParentFile().exists()) {
 61                 file.getParentFile().mkdirs();
 62             }
 63             // 获得dom解析器工厂（工作的作用是用于创建具体的解析器）
 64             DocumentBuilderFactory factory = DocumentBuilderFactory
 65                     .newInstance();
 66             DocumentBuilder builder = null;
 67             try {
 68                 // 获得具体的dom解析器
 69                 builder = factory.newDocumentBuilder();
 70             } catch (ParserConfigurationException e) {
 71                 // TODO Auto-generated catch block
 72                 e.printStackTrace();
 73             }
 74             Document doc = null;
 75             doc = builder.newDocument();// 创建一个新的文档
 76             Element addresslist = doc.createElement("addresslist");
 77             Element linkman = doc.createElement("linkman");
 78             Element name = doc.createElement("name");
 79             Element email = doc.createElement("email");
 80             // 设置标签显示的内容
 81             name.appendChild(doc.createTextNode(MainActivity.this.name
 82                     .getText().toString()));
 83             email.appendChild(doc.createTextNode(MainActivity.this.email
 84                     .getText().toString()));
 85
 86             // 设置标签之间的关系
 87             linkman.appendChild(name);
 88             linkman.appendChild(email);
 89             addresslist.appendChild(linkman);
 90             // 最后放入文档
 91             doc.appendChild(addresslist);
 92
 93             // 取得TransformerFactory实例
 94             TransformerFactory tf = TransformerFactory.newInstance();
 95             Transformer t = null;
 96
 97             try {
 98                 // 从transFactory获取Transformer实例
 99                 t = tf.newTransformer();
100             } catch (TransformerConfigurationException e) {
101                 // TODO Auto-generated catch block
102                 e.printStackTrace();
103             }
104             t.setOutputProperty(OutputKeys.ENCODING, "utf-8");
105             DOMSource source = new DOMSource(doc);// 输出文档
106             StreamResult result = new StreamResult(file);// 指定输出位置
107             try {
108                 t.transform(source, result);// 输出
109             } catch (TransformerException e) {
110                 // TODO Auto-generated catch block
111                 e.printStackTrace();
112             }
113
114         }
115
116     }
117
118 }