要创建一个安卓房间数据库视图,您可以按照以下步骤进行操作:
implementation "androidx.room:room-runtime:2.4.0"
annotationProcessor "androidx.room:room-compiler:2.4.0"
@Entity(tableName = "users")
public class User {
@PrimaryKey
public int id;
public String name;
public int age;
}
@Dao
public interface UserDao {
@Query("SELECT name, age FROM users")
List getAllUsers();
}
public class UserNameAndAge {
public String name;
public int age;
}
@Database(entities = {User.class}, version = 1)
public abstract class AppDatabase extends RoomDatabase {
public abstract UserDao userDao();
}
AppDatabase db = Room.databaseBuilder(getApplicationContext(), AppDatabase.class, "my-db").build();
List users = db.userDao().getAllUsers();
这样,您就可以通过安卓房间数据库视图访问和操作您的数据库了。请注意,上述代码仅提供了一个基本示例,您可以根据您的需求进行自定义和扩展。
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