Just want to know the moment database is created and checked for upgrade.
I dont call create database manualy and leave it to SQLiteOpenHelper. But I dont know, when and how clasees that extend SQLiteOpenHelper are called. Is it before Application onCreate() or after?
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Yarh
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It's inside the DataBase Helper's `onCreate()` (which may also be called in `onUpgrade()`) – Phantômaxx Aug 27 '15 at 09:54
2 Answers
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Databases for an application are created when you create them. Specifically when the application is installed it calls onCreate().
You can read more here: http://developer.android.com/training/basics/data-storage/databases.html
Read the documentation @ http://developer.android.com/reference/android/database/sqlite/SQLiteOpenHelper.html#onCreate(android.database.sqlite.SQLiteDatabase)
Excerpt
public abstract void onCreate (SQLiteDatabase db)
Added in API level 1
Called when the database is created for the first time. This is where the creation of tables and the initial population of the tables should happen.
Parameters
db The database.
JoxTraex
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I dont call create database manually. In that article, I dont see information when db is created by system. – Yarh Aug 27 '15 at 09:49
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A database has to be created by someone, WHAT database are you referring to? – JoxTraex Aug 27 '15 at 09:52
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I am using sqlite database and leave creation, upgrade etc. to `SQLiteOpenHelper` – Yarh Aug 27 '15 at 09:54
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Read the documentation. Also add logs to figure out how they are called. – JoxTraex Aug 27 '15 at 09:55
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It's crated when you make call to SQLiteOpenHelper::getReadableDatabase or SQLiteOpenHelper::getWritableDatabase.
Just check the docs, it's there:
SQLiteOpenHelper::SQLiteOpenHelper(...)
Create a helper object to create, open, and/or manage a database. This method always returns very quickly. The database is not actually created or opened until one of getWritableDatabase() or getReadableDatabase() is called.
pelotasplus
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