integrating-roomdb-step-by-step.md

Integrasi Room Db untuk CRUD sederhana

1. Gradle

Buka Gradle, tambahkan 2 package id berikut ini pada dependencies

implementation "androidx.room:room-runtime:2.3.0"
annotationProcessor "androidx.room:room-compiler:2.3.0"

2. Membuat Pojo Entity beserta Parcelablenya(jika perlu)

@Entity
public class MhsEntity {
  @PrimaryKey(autoGenerate = true)
  private int id;
  @ColumnInfo(name = "nama")
  private String nama;
  @ColumnInfo(name = "alamat")
  private String alamat;
  @ColumnInfo(name = "hp")
  private String hp;
  ...
  ...

3. Membuat DAOI(Data Access Object Interface)

@Dao
public interface MhsDao {

  // Insert
  @Insert
  void insert(MhsEntity... mhs);

  // Update
  @Query("update MhsEntity set nama=:nama, alamat=:alamat, hp=:hp where id=:id")
  void update(String nama, String alamat, String hp, int id);

  //Read
  @Query("select * from MhsEntity")
  List<MhsEntity> getMhs();
  ...
  ...
}

4. Membuat Abstract Database.

@Database(
        entities = {
                MhsEntity.class  //Tambah entity disini..
        },
        version = 1,
        exportSchema = false
)
public abstract class MathDatabase extends RoomDatabase {
        public abstract MhsDao getMhsDao();
}

5. Membuat Main Class meng###extends dari Application.

public class MathApp extends Application {

    public static MathDatabase mathDatabase;

    @Override
    public void onCreate() {
        super.onCreate();
        mathDatabase = Room.databaseBuilder(getApplicationContext(), MathDatabase.class, "math-db-1")
                .allowMainThreadQueries().build();
    }
}

6. Change App Name pada manifest.

<application
        android:name=".MathApp"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
    
...
...

View:

7. Membuat MainActivity dan LinearLayout untuk menampilkan isi tabel.

8. Membuat EditActivity untuk insert dan edit.

9. Membuat ViewItem