Updating a database using OpenHelper in greendao

Question

I use GreenDao as my ORM. I want to migrate the schema from oldversion to the new version. I use this link to implement my mygration. So I wrote my own OpenHelper class and put it in another package. I implement the onUpgrade method as follows:

public class UpgradeHelper extends OpenHelper {

public UpgradeHelper(Context context, String name, CursorFactory factory) {
    super(context, name, factory);
}

/**
 * Apply the appropriate migrations to update the database.
 */
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    Log.i("greenDAO", "My Upgrade Helper -------- Upgrading schema from version " + oldVersion + " to " + newVersion + " by dropping all tables");
    switch (newVersion) {
    case 2:
        new MigrateV1ToV2().applyMigration(db, oldVersion);
        break;
    case 3:
        new MigrateV2ToV3().applyMigration(db, oldVersion);
        break;
    default:
        return;
    }
}

}

But this method was never called when updating the database version from 1 to 2. Also, I can not change the onUpgrade () method in the created DaoMaster class, because it is generated automatically. When I update SCHEMA_VERSION, the onUpgrade () method is called, but it is in the DaoMaster class, and I cannot change it.

Answer 1

onUpgrade(Database, oldSchemaVersion, newSchemaVersion) , SCHEMA-VERSION, SQLite, SCHEMA-VERSION, .

, . , reset , , SQLiteManager.

Answer 2

SCHEMA_VERSION , , DAOMaster onUpgrade