Skip to main content

Android Room


Dependencies

    implementation "android.arch.persistence.room:runtime:1.0.0"
    annotationProcessor "android.arch.persistence.room:compiler:1.0.0"
    configurations.all {
        resolutionStrategy.force 'com.android.support:support-annotations:23.1.0'
    }


1. Create Model - Getter Setters , Defualt Constructor

 @Entity
public class Movies {
    @NonNull
    @PrimaryKey
    private String movieId;
    private String movieName;
}

2. Create Interface DAO -
@Dao
public interface DaoAccess {

    @Insert
    void insertOnlySingleMovie (Movies movies);

    @Insert
    void insertMultipleMovies (List<Movies> moviesList);

    @Query("SELECT * FROM Movies WHERE movieId = :movieId")
    Movies fetchOneMoviesbyMovieId (int movieId);

    @Update
    void updateMovie (Movies movies);

    @Delete
    void deleteMovie (Movies movies);
}

3. Create - > abstract class MovieDatabase extends RoomDatabase

@Database(entities = {Movies.class}, version = 1, exportSchema = false)
public abstract class MovieDatabase extends RoomDatabase {
    public abstract DaoAccess daoAccess() ;

}

 4. OnCreate -

movieDatabase = Room.databaseBuilder(getApplicationContext(),
        MovieDatabase.class, DATABASE_NAME)
        .fallbackToDestructiveMigration()
        .allowMainThreadQueries()
        .build();
public void onClick --> Movies movies2 = movieDatabase.daoAccess().fetchOneMoviesbyMovieId(3);

Comments

Post a Comment

Popular posts from this blog

Android Volley

Key Components   RequestQueue: A Queue containing the Network/HTTP Requests that needs to be made. Request: A Base Class which contains Network related information like HTTP Methods. StringRequest: HTTP Request where the response is parsed a String.  View Source JsonObjectRequest: HTTP Request where the response is JSONObject.  View Source private static final String URL = "http://httpbin.org/get?param1=hello" ; private static final String TAG = MainActivity. class .getSimpleName() ; @BindView (R.id. dataView ) TextView dataView ; @Override protected void onCreate (Bundle savedInstanceState) { super .onCreate(savedInstanceState) ; setContentView(R.layout. activity_volly_sample ) ; ButterKnife. bind ( this ) ; RequestQueue requestQueue = Volley. newRequestQueue ( this ) ; JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method. GET , URL , null, new Response.Listener<JSONObject>() { ...
Post a Comment
Read more

Android Room + Card View + RecyclerVIew

@Entity public class User { @PrimaryKey(autoGenerate = true) private Long userid; private String username; private String usercontact; private String useremail; } @Dao public interface UserDao { @Insert Long SaveUser(User user); @Update int UpdateUser(User user); @Query("SELECT * FROM USER WHERE USER.userid = :id") User FindUserById(Long id); @Query("SELECT * FROM USER") List<User> FindAll(); @Query("DELETE FROM USER WHERE USER.userid = :id") void DeleteUserById(Long id); } @Database(entities = {User.class}, version = 1, exportSchema = false) public abstract class UserDatabase extends RoomDatabase{ public abstract UserDao userDao(); } public class UserAdapter extends RecyclerView.Adapter<UserAdapter.MyViewHolder> List<User> userList; private Context mContext; https://github.com/gsandaru/AndroidRoomExample onCreateViewHolder---------------...
Post a Comment
Read more

Retrofit

Dependencies compile 'com.squareup.retrofit2:retrofit:2.4.0' compile 'com.squareup.retrofit2:converter-gson:2.4.0'     configurations.all {         resolutionStrategy.force 'com.android.support:support-annotations:23.1.0'     } 1. Create Model Class + getters Setters 2. Create Layout 3. Create RetrofitClient public class RetrofitClient {     private static Retrofit retrofitClient = null;     public static Retrofit getRetrofitClient(String baseurl) {         if(retrofitClient == null){             retrofitClient = new Retrofit.Builder()                     .baseUrl(baseurl)                     .addConverterFactory(GsonConverterFactory.create()).build();         }         return retrofitClient;     } } 4...
Post a Comment
Read more