Sync in Android sqlite and sql server (crud operation) in two ways

Question

I am developing an android application which have

• sq lite db on my device

• server sql db on main server which sync them, with two identical
  (same fields structure and fields name)

• i need to develop synchronization between these db in 2 ways

• If I change database data in Android then It will change data on web server

• when i change data from sever then it should change data in android

• sync will run in 1 day automatically

  now the question is How do I sync those databases in Android? as i am newly entered in mobile world and i am internee also and they give said if i will done this work then i will be permanent.

found several things but i am at beginners level. i don't find any samples. i have found similar questions here but does not find any code , any sample which only sync data on 2 way.

i will appreciate if some one will give me (open source project) or some sample code with some explanation.

or something like that which will show me a way to do this.

How to sync SQLite database on Android phone with MySQL database on server?

Android bi-directional sqlite database synchronization

i have found these article but does not help me.

Answer 1

Use this as your android service

public class Connector {

HttpClient httpClient = null;
HttpPost httpPost = null;
HttpResponse httpResponse = null;
String serverResponse = null;

public String callService(String url){

    try{
        httpClient = new DefaultHttpClient();
        httpPost = new HttpPost(url);
        httpResponse = httpClient.execute(httpPost);
        //Log.e("URL Response", serverResponse);
        serverResponse = EntityUtils.toString(httpResponse.getEntity());
    }
    catch(Exception ex){
        Log.e("Exception in connectivity", ex.toString());
    }
    //Log.e("URL Response", serverResponse);
    return serverResponse;
}

}

This class helps you updating android db

public class DbSync extends SQLiteOpenHelper {

private static String DB_PATH = "";
private static final String DATABASE_NAME = "Your_Db_Name";
private SQLiteDatabase sqliteDb = null;
private String path = null;

public DbSync(Context context) {
    super(context, DATABASE_NAME, null, 1);
    DB_PATH = "/data/data/" + context.getPackageName() + "/databases/";
    path = DB_PATH + DATABASE_NAME;
}

@Override
public void onCreate(SQLiteDatabase db) {

}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

}

public void syncUsers(){
    try {
        String response = new TaskAsync().execute("URL_Where_Service_Running").get();
        Log.d("response", response);

        String tableName = "Table_Name";

        sqliteDb = SQLiteDatabase.openDatabase(path, null,  SQLiteDatabase.OPEN_READWRITE);
        sqliteDb.delete(tableName, null, null);

                    //here you have to parse your data from DB and insert using 
                    ContentValues values = new ContentValues();
        values.put("col_name1", parsedColumnValue);
        values.put("col_name2", parsedColumnValue);

        long status = sqliteDb.insert(tableName, " ", values);

        Log.d("database", Long.toString(status));


        sqliteDb.close();

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

You have to tailor the above code according to your data returned from DB. hope it helps:)