Android Sqlite Onupgrade Not Working
Android SQLite onUpgrade add a new table without touching the old ones. January 16, 2019, at 06:30 AM. I have a database setup in android right now. The database and tables work fine. However, when I want to add a new table and use onUpgrade - the database is created, but doesn't properly work. As in the table looks created but I can't add. Sqlite android free download. OCR Manga Reader for Android OCR Manga Reader is a free and open source Android app that allows you to quickly OCR and lookup Jap. I have tried changing the version number in my SQLiteOpenHelper class and versionCode in manifest but onUpgrade is not called. I need to check my onUpgrade code before upload it to the market, I don't want my app's users get a buggy upgrade. Android:: SQLite Using The SQLiteOpenHelper Jun 9, 2010. Download weezer white album video. We spend countless hours.
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Documentation says:
The database is not actually created or opened until one of getWritableDatabase() or getReadableDatabase() is called.
I see that you've implemented your own methods for getting database: openDataBaseForRead() and openDataBaseForWrite(). That's bad ;-)
I want to upgrade my database when it is installed onto my android emulator.I have set the db version in my DbHelper which inherits from SQLiteOpenHelper to +1.
However, when my 1st activity loads, I instantiate my DbHelper, which I would expect SQLiteOpenHelper to call onUpgrade as the db version is now newer. However it is never called. I'm wondering if there is something I am missing. Where is the version that the DbHelper is using stored to compare against the new version? Why is this not working?
I am actually copying the database from the assets folder into the data folder rather than re-creating the schema.
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This is a code snippet from the source of SQLiteOpenHelper.getWritableDatabase():
As you can see, the onCreate() or onUpgrade() are called within the call to getWritableDatabase().You have to use these calls whenever you need an instance of SQLiteDatabase. You shouldn't use your own methods, except if they are wrappers arround the getWritableDatabase or getReadableDatabase method.