无法从第二类访问数据库帮助程序

I have made CurrentChanceDatabse class in my app. It extends SQLiteOpenHelper. I have made some methods to assess tables and data. When I access the CurrentChanceDatabase class with the following code, it works perfectly fine in the MainActivity(the default one which starts when the app is launched). All the methods work fine.I have made CurrentChanceDatabse class in my ap