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Pre populated databases

Ken Ratanachai S edited this page Jun 26, 2017 · 6 revisions

You can use a pre-populated database by following these steps:

  1. Place a copy of the SQLite database file in the assets directory of your application, for example:


  2. Ensure you set the AA_DB_NAME in the manifest file, for example:

    <meta-data android:name="AA_DB_NAME" android:value="prepop.db" />

Now when you deploy your application it will copy the prepop.db file from the assets directory to /data/data/myapp/databases storage.

Note: This will cause a duplication of the database as it will be both, packaged with the APK and copied to the storage directory.

Ensure the Database Works Properly with ActiveAndroid

To ensure the database works properly with ActiveAndroid take the following steps:

  1. Setup the android_metadata table

    CREATE TABLE "android_metadata" ("locale" TEXT DEFAULT 'en_US')
    INSERT INTO "android_metadata" VALUES ('en_US')
  2. If you have not defined the id column name for your models, ensure the primary keys are renamed to the default, Id, instead of _id, which is the standard for Android databases. However, if your data is to be displayed in ListViews, for example, it is recommended to define your primary key columns as _id. You can do this by simply adding a id = "_id" param to the @Table annotation on your model, like so:

    @Table(name = "Items", id = "_id")
    public class Item extends Model {