在onUpgrade方法中选择行

Question

I have created method to select rows using getReadableDatabase() and cursors, everything is working fine, but when I try to use that method in onUpgrade, my app is crashing.

Did someone had similar problem?

Answer 1

onUpgrade() is triggered by an attempt to open a database via the SQLiteOpenHelper. getReadableDatabase() uses the SQLiteOpenHelper, so calling your method from onUpgrade will cause endless recursion, and a stack overflow.

So, you'll need a version of your method that uses the database passed into the onUpgrade() method instead of calling getReadableDatabase()