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The viewmodels have been modified to not repeat calls to the backend during the lifecycle of the fragment

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antonio 2022-09-05 08:21:01 +02:00
parent 6817fa739e
commit 8b883c88fc
6 changed files with 87 additions and 46 deletions
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33
app/src/main/java/com/cappielloantonio/play/viewmodel/LibraryViewModel.java
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@ -17,8 +17,6 @@ import com.cappielloantonio.play.repository.ArtistRepository;
import com.cappielloantonio.play.repository.GenreRepository;
import com.cappielloantonio.play.repository.PlaylistRepository;
import java.util.Calendar;
import java.util.Comparator;
import java.util.List;
public class LibraryViewModel extends AndroidViewModel {
@ -41,28 +39,37 @@ public class LibraryViewModel extends AndroidViewModel {
artistRepository = new ArtistRepository(application);
genreRepository = new GenreRepository(application);
playlistRepository = new PlaylistRepository(application);
// Inizializzate all'interno del costruttore, in modo da rimanere immutabili per tutto il
// ciclo di vita dell'applicazione
albumRepository.getAlbums("random", 10, null, null).observeForever(sampleAlbum::postValue);
artistRepository.getArtists(true, 10).observeForever(sampleArtist::postValue);
genreRepository.getGenres(true, 15).observeForever(sampleGenres::postValue);
playlistRepository.getPlaylists(true, 10).observeForever(playlistSample::postValue);
}
public LiveData<List<Album>> getAlbumSample() {
public LiveData<List<Album>> getAlbumSample(LifecycleOwner owner) {
if (sampleAlbum.getValue() == null) {
albumRepository.getAlbums("random", 10, null, null).observe(owner, sampleAlbum::postValue);
}
return sampleAlbum;
}
public LiveData<List<Artist>> getArtistSample() {
public LiveData<List<Artist>> getArtistSample(LifecycleOwner owner) {
if (sampleArtist.getValue() == null) {
artistRepository.getArtists(true, 10).observe(owner, sampleArtist::postValue);
}
return sampleArtist;
}
public LiveData<List<Genre>> getGenreSample() {
public LiveData<List<Genre>> getGenreSample(LifecycleOwner owner) {
if (sampleGenres.getValue() == null) {
genreRepository.getGenres(true, 15).observe(owner, sampleGenres::postValue);
}
return sampleGenres;
}
public LiveData<List<Playlist>> getPlaylistSample() {
public LiveData<List<Playlist>> getPlaylistSample(LifecycleOwner owner) {
if (playlistSample.getValue() == null) {
playlistRepository.getPlaylists(true, 10).observe(owner, playlistSample::postValue);
}
return playlistSample;
}