如何在 android 中使用 GreenDao 为数据库添加初始数据？

Question

我一直在本机模式下插入初始数据

How to add initial data to SQLite database?

如何使用 Green dao 获得相同的结果？

这是我的申请class

public class App extends Application{


    @Override
    public void onCreate() {

        super.onCreate();
        DaoMaster.DevOpenHelper helper = new DaoMaster.DevOpenHelper(this,"Images-bd",null);
        SQLiteDatabase db = helper.getWritableDatabase();
        DaoMaster daoMaster = new DaoMaster(db);
        DaoSession daoSession = daoMaster.newSession();



    }

}

Answer 1

您可以创建一个 class 来扩展 DaoMaster 和运行您在 onCreate 方法中的查询：

public class CustomDaoMaster extends DaoMaster {
    public CustomDaoMaster(SQLiteDatabase db) {
        super(db);
    }

    public static class OpenHelper extends DaoMaster.OpenHelper {
        public OpenHelper(Context context, String name, SQLiteDatabase.CursorFactory factory) {
            super(context, name, factory);
        }

        @Override
        public void onCreate(SQLiteDatabase db) {
            super.onCreate(db);
            db.execSQL("INSERT INTO myTable VALUES('foo')");
            db.execSQL("INSERT INTO myTable VALUES('bar')");
        }
    }
}

因此，在您的 Application class 中，您将使用此 class 的实例：

public class App extends Application {

    @Override
    public void onCreate() {
        super.onCreate();
        CustomDaoMaster.OpenHelper helper = new CustomDaoMaster.OpenHelper(this, "Images-bd", null);
        SQLiteDatabase db = helper.getWritableDatabase();
        CustomDaoMaster daoMaster = new CustomDaoMaster(db);
        DaoSession daoSession = daoMaster.newSession();
    }
}

如何在 android 中使用 GreenDao 为数据库添加初始数据？

How to add initial data for DB using GreenDao in android?

java

sqlite

android

greendao

greendao-generator