Change a value in a column in sqlite

I need to update a value in a column from a certain table. I tried this :

 public void updateOneColumn(String TABLE_NAME, String Column, String rowId, String ColumnName, String newValue){
                 String sql = "UPDATE "+TABLE_NAME +" SET " + ColumnName+ " = "+newValue+" WHERE "+Column+ " = "+rowId;
                 db.beginTransaction();
                 SQLiteStatement stmt = db.compileStatement(sql);
                 try{
                     stmt.execute();
                     db.setTransactionSuccessful();
                 }finally{
                     db.endTransaction();
                 }

        }

and I call this method like this :

 db.updateOneColumn("roadmap", "id_roadmap",id,"sys_roadmap_status_mobile_id", "1");

which means that I want to set the value 1 in the column sys_roadmap_status_mobile_id when id_roadmap = id.

The problem is that nothing happens. Where is my mistake?