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短信备份的原理
短信备份的原理。是用内容提供者读取短信，然后保存。
public class SmsBackupUtils {
// 回调接口
public interface SmsBackupCallback {
/**
* 短信备份前调用
* @param total 短信的总条数
*/
public void beforeSmsbackup(int total);
/**
* 短信调用中调用
* @param progress 短信的进度
*/
public void progressSmsbackup(int progress);
}
/**
* 短信备份的方法,备份到xml文件里,由于xml文件跨平台性强 这是一个耗时操作,应该放在子线程中运行
*
* @param context 上下文
* @param path 备份到哪个路径
* @throws Exception
*/
public static void smsBackup(Context context, String path,SmsBackupCallback callBack) throws Exception {
// xml的序列化器
XmlSerializer serializer = Xml.newSerializer();
File file = new File(path);
FileOutputStream fos = new FileOutputStream(file);
// 设置參数
serializer.setOutput(fos, "utf-8");
// 開始
serializer.startDocument("utf-8", true);
serializer.startTag(null, "smss");
ContentResolver resolver = context.getContentResolver();
Uri uri = Uri.parse("content://sms");// 包括全部短信
Cursor cursor = resolver.query(uri, new String[] { "address", "date",
"type", "body" }, null, null, null);
/*dialog.setMax(cursor.getCount());
progressBar1.setMax(cursor.getCount());*/
callBack.beforeSmsbackup(cursor.getCount());
int progress = 0;
while (cursor.moveToNext()) {
serializer.startTag(null, "sms");
serializer.startTag(null, "address");
String address = cursor.getString(0);
serializer.text(address);
serializer.endTag(null, "address");
serializer.startTag(null, "date");
String date = cursor.getString(1);
serializer.text(date);
serializer.endTag(null, "date");
serializer.startTag(null, "type");
String type = cursor.getString(2);
serializer.text(type);
serializer.endTag(null, "type");
serializer.startTag(null, "body");
String body = cursor.getString(3);
serializer.text(body);
serializer.endTag(null, "body");
serializer.endTag(null, "sms");
progress++;
/*dialog.setProgress(progress);
progressBar1.setProgress(progress);*/
callBack.progressSmsbackup(progress);
SystemClock.sleep(1000);
}
cursor.close();
serializer.endTag(null, "smss");
serializer.endDocument();
}
}
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