短信备份

package com.su.smsbackuprestore.operatesms;


import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.Date;


import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.xmlpull.v1.XmlSerializer;




import android.content.ContentResolver;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteException;
import android.net.Uri;
import android.os.Environment;
import android.util.Log;
import android.util.Xml;
import android.widget.Toast;


public class ExportSmsXml {
Context context;
public static final String SMS_URI_ALL = "content://sms/";
private FileOutputStream outStream = null;
private XmlSerializer serializer;


public ExportSmsXml(Context context) {
this.context = context;
}


public void xmlStart() {


String path = Environment.getExternalStorageDirectory().getPath() + "/SMSBackup";
File file = new File(path);
if (!file.exists()) {
file.mkdirs();
}
File file2 = new File(path, "message.xml");
try {
outStream = new FileOutputStream(file2);
serializer = Xml.newSerializer();
serializer.setOutput(outStream, "UTF-8");
serializer.startDocument("UTF-8", true);
serializer.startTag(null, "sms");

} catch (Exception e) {
e.printStackTrace();
}
}


public boolean createXml() throws Exception {


this.xmlStart();
Cursor cursor = null;
try {
ContentResolver conResolver = context.getContentResolver();
String[] projection = new String[] { SmsField.ADDRESS, SmsField.PERSON, SmsField.DATE, SmsField.PROTOCOL, 
SmsField.READ, SmsField.STATUS, SmsField.TYPE, SmsField.REPLY_PATH_PRESENT,
SmsField.BODY,SmsField.LOCKED,SmsField.ERROR_CODE, SmsField.SEEN }; // type=1是收件箱，==2是发件箱;read=0表示未读，read=1表示读过，seen=0表示未读，seen=1表示读过
Uri uri = Uri.parse(SMS_URI_ALL);
cursor = conResolver.query(uri, projection, null, null, "_id asc");
if (cursor.moveToFirst()) {
// 查看数据库sms表得知 subject和service_center始终是null所以这里就不获取它们的数据了。
String address;
String person;
String date;
String protocol;
String read;
String status;
String type;
String reply_path_present;
String body;
String locked;
String error_code;
String seen;
do {
// 如果address == null，xml文件中是不会生成该属性的,为了保证解析时，属性能够根据索引一一对应，必须要保证所有的item标记的属性数量和顺序是一致的
address = cursor.getString(cursor.getColumnIndex(SmsField.ADDRESS));
if (address == null) {
address = "";
}
person = cursor.getString(cursor.getColumnIndex(SmsField.PERSON));
if (person == null) {
person = "";
}
date = cursor.getString(cursor.getColumnIndex(SmsField.DATE));
if (date == null) {
date = "";
}
protocol = cursor.getString(cursor.getColumnIndex(SmsField.PROTOCOL));
if (protocol == null) {// 为了便于xml解析
protocol = "";
}
read = cursor.getString(cursor.getColumnIndex(SmsField.READ));
if (read == null) {
read = "";
}
status = cursor.getString(cursor.getColumnIndex(SmsField.STATUS));
if (status == null) {
status = "";
}
type = cursor.getString(cursor.getColumnIndex(SmsField.TYPE));
if (type == null) {
type = "";
}
reply_path_present = cursor.getString(cursor.getColumnIndex(SmsField.REPLY_PATH_PRESENT));
if (reply_path_present == null) {// 为了便于XML解析
reply_path_present = "";
}
body = cursor.getString(cursor.getColumnIndex(SmsField.BODY));
if (body == null) {
body = "";
}
locked = cursor.getString(cursor.getColumnIndex(SmsField.LOCKED));
if (locked == null) {
locked = "";
}
error_code = cursor.getString(cursor.getColumnIndex(SmsField.ERROR_CODE));
if (error_code == null) {
error_code = "";
}
seen = cursor.getString(cursor.getColumnIndex(SmsField.SEEN));
if (seen == null) {
seen = "";
}
// 生成xml子标记
// 开始标记
serializer.startTag(null, "item");
// 加入属性
serializer.attribute(null, SmsField.ADDRESS, address);
serializer.attribute(null, SmsField.PERSON, person);
serializer.attribute(null, SmsField.DATE, date);
serializer.attribute(null, SmsField.PROTOCOL, protocol);
serializer.attribute(null, SmsField.READ, read);
serializer.attribute(null, SmsField.STATUS, status);
serializer.attribute(null, SmsField.TYPE, type);
serializer.attribute(null, SmsField.REPLY_PATH_PRESENT, reply_path_present);
serializer.attribute(null, SmsField.BODY, body);
serializer.attribute(null, SmsField.LOCKED, locked);
serializer.attribute(null, SmsField.ERROR_CODE, error_code);
serializer.attribute(null, SmsField.SEEN, seen);
// 结束标记
serializer.endTag(null, "item");


} while (cursor.moveToNext());
} else {


return false;
}


} catch (SQLiteException ex) {
ex.printStackTrace();
Log.d("SQLiteException:", ex.getMessage());
}finally {
if(cursor != null) {
cursor.close();//手动关闭cursor，及时回收
}
}
serializer.endTag(null, "sms");
serializer.endDocument();
outStream.flush();
outStream.close();
return true;
}
}