Reports

I finally solved the problem the day after I posted the problem.n the MSSQLConnection and SQLite classes I didn't pass the context from class to an other, As @CommonsWare mentioned the context was null. So in class MSSQLConnection i had to add the below line:

public MSSQLConnection(Context context){
    this.context = context;
    **this.SQLQueries=new SQLQueries(context);**
}

and in SQLite class:

public  SQLite(Context context) {
    super(context, DATABASE_NAME, null, DB_Version);
    **this.context = context;**
    **this.mssqlConnection = new MSSQLConnection(context);**  
}

and in SQLQueries class i had to remove this line

connectionSQL = new MSSQLConnection(context);

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