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Code Issues Projects Releases Packages Wiki Activity Actions

First experiment with on-scrolling pagination on track list by genre

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This commit is contained in:
antonio 2023-03-19 18:23:52 +01:00
parent b345695fa2
commit 35bc02e6d9
4 changed files with 83 additions and 16 deletions
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36
app/src/main/java/com/cappielloantonio/play/helper/recyclerview/PaginationScrollListener.java Normal file
View file

@ -0,0 +1,36 @@
package com.cappielloantonio.play.helper.recyclerview;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
public abstract class PaginationScrollListener extends RecyclerView.OnScrollListener {
private static final String TAG = "PaginationScrollListener";
private LinearLayoutManager layoutManager;
protected PaginationScrollListener(LinearLayoutManager layoutManager) {
this.layoutManager = layoutManager;
}
@Override
public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
int visibleItemCount = layoutManager.getChildCount();
int totalItemCount = layoutManager.getItemCount();
int firstVisibleItemPosition = layoutManager.findFirstVisibleItemPosition();
if (!isLoading()) {
if (firstVisibleItemPosition >= 0 && (visibleItemCount + firstVisibleItemPosition) >= totalItemCount) {
loadMoreItems();
}
}
}
protected abstract void loadMoreItems();
public abstract boolean isLoading();
}

19
app/src/main/java/com/cappielloantonio/play/repository/SongRepository.java
View file

@ -11,7 +11,6 @@ import com.cappielloantonio.play.subsonic.models.Child;
import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedHashSet;
import java.util.List;
import retrofit2.Call;
@ -171,27 +170,19 @@ public class SongRepository {
});
}
public MutableLiveData<List<Child>> getSongsByGenre(String id) {
public MutableLiveData<List<Child>> getSongsByGenre(String id, int page) {
MutableLiveData<List<Child>> songsByGenre = new MutableLiveData<>();
Log.d(TAG, "onScrolled PAGE: " + page);
App.getSubsonicClientInstance(false)
.getAlbumSongListClient()
.getSongsByGenre(id, 500, 0)
.getSongsByGenre(id, 100, 100 * page)
.enqueue(new Callback<ApiResponse>() {
@Override
public void onResponse(@NonNull Call<ApiResponse> call, @NonNull Response<ApiResponse> response) {
if (response.isSuccessful() && response.body() != null && response.body().getSubsonicResponse().getSongsByGenre() != null) {
List<Child> newSongs = response.body().getSubsonicResponse().getSongsByGenre().getSongs();
List<Child> songs = songsByGenre.getValue();
if (songs == null) songs = new ArrayList<>();
songs.addAll(newSongs);
Collections.shuffle(songs);
LinkedHashSet<Child> hashSet = new LinkedHashSet<>(songs);
ArrayList<Child> songsWithoutDuplicates = new ArrayList<>(hashSet);
songsByGenre.setValue(songsWithoutDuplicates);
songsByGenre.setValue(response.body().getSubsonicResponse().getSongsByGenre().getSongs());
}
}

23
app/src/main/java/com/cappielloantonio/play/ui/fragment/SongListPageFragment.java
View file

@ -18,6 +18,7 @@ import androidx.recyclerview.widget.LinearLayoutManager;
import com.cappielloantonio.play.R;
import com.cappielloantonio.play.databinding.FragmentSongListPageBinding;
import com.cappielloantonio.play.helper.recyclerview.PaginationScrollListener;
import com.cappielloantonio.play.interfaces.ClickCallback;
import com.cappielloantonio.play.service.MediaManager;
import com.cappielloantonio.play.service.MediaService;
@ -32,6 +33,8 @@ import java.util.Collections;
@UnstableApi
public class SongListPageFragment extends Fragment implements ClickCallback {
private static final String TAG = "SongListPageFragment";
private FragmentSongListPageBinding bind;
private MainActivity activity;
private SongListPageViewModel songListPageViewModel;
@ -40,6 +43,8 @@ public class SongListPageFragment extends Fragment implements ClickCallback {
private ListenableFuture<MediaBrowser> mediaBrowserListenableFuture;
private boolean isLoading = true;
@Override
public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
activity = (MainActivity) getActivity();
@ -163,7 +168,23 @@ public class SongListPageFragment extends Fragment implements ClickCallback {
songHorizontalAdapter = new SongHorizontalAdapter(this, true);
bind.songListRecyclerView.setAdapter(songHorizontalAdapter);
songListPageViewModel.getSongList().observe(getViewLifecycleOwner(), songs -> songHorizontalAdapter.setItems(songs));
songListPageViewModel.getSongList().observe(getViewLifecycleOwner(), songs -> {
isLoading = false;
songHorizontalAdapter.setItems(songs);
});
bind.songListRecyclerView.addOnScrollListener(new PaginationScrollListener((LinearLayoutManager) bind.songListRecyclerView.getLayoutManager()) {
@Override
protected void loadMoreItems() {
isLoading = true;
songListPageViewModel.getSongsByPage(getViewLifecycleOwner());
}
@Override
public boolean isLoading() {
return isLoading;
}
});
}
private void initializeMediaBrowser() {

21
app/src/main/java/com/cappielloantonio/play/viewmodel/SongListPageViewModel.java
View file

@ -5,6 +5,7 @@ import android.text.TextUtils;
import androidx.annotation.NonNull;
import androidx.lifecycle.AndroidViewModel;
import androidx.lifecycle.LifecycleOwner;
import androidx.lifecycle.LiveData;
import androidx.lifecycle.MutableLiveData;
@ -48,7 +49,7 @@ public class SongListPageViewModel extends AndroidViewModel {
switch (title) {
case Constants.MEDIA_BY_GENRE:
songList = songRepository.getSongsByGenre(genre.getGenre());
songList = songRepository.getSongsByGenre(genre.getGenre(), 0);
break;
case Constants.MEDIA_BY_ARTIST:
songList = artistRepository.getTopSongs(artist.getName(), 50);
@ -67,6 +68,24 @@ public class SongListPageViewModel extends AndroidViewModel {
return songList;
}
public void getSongsByPage(LifecycleOwner owner) {
switch (title) {
case Constants.MEDIA_BY_GENRE:
int page = (songList.getValue() != null ? songList.getValue().size() : 0) / 100;
songRepository.getSongsByGenre(genre.getGenre(), page).observe(owner, children -> {
List<Child> currentMedia = songList.getValue();
currentMedia.addAll(children);
songList.setValue(currentMedia);
});
break;
case Constants.MEDIA_BY_ARTIST:
case Constants.MEDIA_BY_GENRES:
case Constants.MEDIA_BY_YEAR:
case Constants.MEDIA_STARRED:
break;
}
}
public String getFiltersTitle() {
return TextUtils.join(", ", filterNames);
}