Android threading and database locking

Question

We are using AsyncTasks to access database tables and cursors.

Unfortunately we are seeing occasional exceptions regarding the database being locked.

Answer 1

You must be calling getWritableDatabase() from a function rather then the constructor of the db helper class. If the db helper class object is created with SQLiteDatabase.openOrCreateDatabase(DB_PATH, null); or similar and then getWritableDatabase() is called from a function, it will try to make a synchronous call to DB causing a DB lock exception.