如何将联系人或短信作为.xml文件或.csv文件备份到SD卡,并在以后恢复

Question

我正在尝试在我的应用程序中开发一个功能,将sms和联系人备份到SD卡,格式为.xml或.csv格式,稍后再恢复.

所以请任何人给我一些建议或一些示例代码或任何与此相关的资源链接.

提前致谢

Answer 1

    public ArrayList<String> smsBuffer = new ArrayList<String>();
    String smsFile = "SMS"+".csv";
       private void  backupSMS(){
    smsBuffer.clear();
    Uri mSmsinboxQueryUri = Uri.parse("content://sms");
    Cursor cursor1 = getContentResolver().query(
            mSmsinboxQueryUri,
            new String[] { "_id", "thread_id", "address", "person", "date",
                    "body", "type" }, null, null, null);
    //startManagingCursor(cursor1);
    String[] columns = new String[] { "_id", "thread_id", "address", "person", "date", "body",
            "type" };
    if (cursor1.getCount() > 0) {
        String count = Integer.toString(cursor1.getCount());
        Log.d("Count",count);
        while (cursor1.moveToNext()) {

             String messageId = cursor1.getString(cursor1
                    .getColumnIndex(columns[0]));

             String threadId = cursor1.getString(cursor1
                    .getColumnIndex(columns[1]));

            String address = cursor1.getString(cursor1
                    .getColumnIndex(columns[2]));
            String name = cursor1.getString(cursor1
                    .getColumnIndex(columns[3]));
            String date = cursor1.getString(cursor1
                    .getColumnIndex(columns[4]));
            String msg = cursor1.getString(cursor1
                    .getColumnIndex(columns[5]));
            String type = cursor1.getString(cursor1
                    .getColumnIndex(columns[6]));



            smsBuffer.add(messageId + ","+ threadId+ ","+ address + "," + name + "," + date + " ," + msg + " ,"
                    + type);

        }           
        generateCSVFileForSMS(smsBuffer);
    }               
}


 private void generateCSVFileForSMS(ArrayList<String> list)
{

    try 
    {
        String storage_path = Environment.getExternalStorageDirectory().toString() + File.separator + smsFile;
        FileWriter write = new FileWriter(storage_path);

        write.append("messageId, threadId, Address, Name, Date, msg, type");
        write.append('\n');

        for (String s : list)
        {
            write.append(s);
            write.append('\n');
        }
        write.flush();
        write.close();
    }

    catch (NullPointerException e) 
    {
        System.out.println("Nullpointer Exception "+e);
         //  e.printStackTrace();
     }
    catch (IOException e) 
    {
        e.printStackTrace();
    }
    catch (Exception e) 
    {
        e.printStackTrace();
   }

}