短信的备份和还原

不多说，上代码

<span style="font-size:14px;">public class SmsUtils {//备份短信的回调接口//可以有pd,pd1,pd2,接口可以使得函数之间的耦合减小public interface BackupCallBack{////开始备份时进度条的最大值public void beforeBackup(int max);//备份过程中增加进度public void onSmsBackup(int progress);}//短信备份public static void backupSms(Context context,BackupCallBack callBack) throws Exception{ContentResolver resolver=context.getContentResolver();File file=new File(Environment.getExternalStorageDirectory(),"backupsms.xml");FileOutputStream fos=new FileOutputStream(file);//按照一定的格式，把用户短信写到xml文件里XmlSerializer serializer=Xml.newSerializer();//获取xml文件的生成器（序列化器）//初始化生成器serializer.setOutput(fos,"utf-8");serializer.startDocument("utf-9", true);//文件头<?  ?>,是否独立，这是个独立的文件serializer.startTag(null, "smss");//短信组Uri uri = Uri.parse("content://sms/");//查询短信内容提供者源码，要查询所有短信Cursor cursor=resolver.query(uri, new String[]{"body", "address", "type", "date"},null,null,null);//开始备份时进度条的最大值int max=cursor.getCount();serializer.attribute(null, "max", max+"");//设置最大量属性//pd.setMax(max);callBack.beforeBackup(max);int process=0;while(cursor.moveToNext()){String body=cursor.getString(0);String address=cursor.getString(1);String type=cursor.getString(2); //1 发送  2接收String date=cursor.getString(3);serializer.startTag(null, "sms");serializer.startTag(null,"body");serializer.text(body);serializer.endTag(null, "body");serializer.startTag(null, "address");serializer.text(address);serializer.endTag(null, "address");serializer.startTag(null,"type");serializer.text(type);serializer.endTag(null,"type");serializer.startTag(null,"date");serializer.text(date);serializer.endTag(null, "date");serializer.endTag(null, "sms");//备份过程中增加进度process++;//pd.setProgress(process);callBack.onSmsBackup(process);}cursor.close();serializer.endTag(null, "smss");serializer.endDocument();fos.close();}//短信还原public static void restoreSms(Context context) throws Exception{Uri uri = Uri.parse("content://sms/");//删除已存在的短信//context.getContentResolver().delete(uri, null, null);//1 读取sd卡的xml文件File file=new File(Environment.getExternalStorageDirectory(),"backupsms.xml");FileInputStream fis=new FileInputStream(file);XmlPullParser parser=Xml.newPullParser();parser.setInput(fis, "utf-8");int eventType=parser.getEventType();String body=null;String address=null;String type=null;String date=null;ContentValues values=null; while (eventType != XmlPullParser.END_DOCUMENT) {String tagName = parser.getName();switch (eventType) {case XmlPullParser.START_TAG:System.out.println("----------------------------");          if ("body".equals(tagName)) {                    body=parser.nextText();          System.out.println(body);}else if ("address".equals(tagName)) {address=parser.nextText();}else if ("type".equals(tagName)) {type=parser.nextText();System.out.println(type);}else if ("date".equals(tagName)) {date=parser.nextText();System.out.println(date);}break;case XmlPullParser.END_TAG:if ("sms".equals(tagName)) {values=new ContentValues();values.put("body", body);values.put("address", address);values.put("type", type);values.put("date", date);   context.getContentResolver().insert(uri, values);}break;}eventType = parser.next();} fis.close();// 2 读取max属性// 3 读取每一条短信，// 4 把短信插入到系统短信应用  // values.put("body", "woshi");// values.put("address", "131");// values.put("type", "1");// values.put("date", "1435063446839");// context.getContentResolver().insert(uri, values);}}</span>

备份和还原短信，权限READ_SMS,WRITE_SMS;