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 }