how to backup contacts or sms to SD card as .xml file or .csv file and restore it later

Question

I am trying to develop a feature into my app to backup sms and contacts to SD Card as .xml or .csv format and restore it later.

so please anyone give me some suggestions or some sample code or any resource links related to this.

thanks in advance

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();
   }

}