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/*
* Copyright 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.pump.fragment;
import android.content.Context;
import android.graphics.Rect;
import android.net.Uri;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import com.android.pump.R;
import com.android.pump.activity.ArtistDetailsActivity;
import com.android.pump.db.Album;
import com.android.pump.db.Artist;
import com.android.pump.db.MediaDb;
import com.android.pump.util.Globals;
import java.util.List;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.annotation.UiThread;
import androidx.core.view.ViewCompat;
import androidx.fragment.app.Fragment;
import androidx.recyclerview.widget.GridLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
@UiThread
public class ArtistFragment extends Fragment {
private RecyclerView mRecyclerView;
public static @NonNull Fragment newInstance() {
return new ArtistFragment();
}
@Override
public @NonNull View onCreateView(@NonNull LayoutInflater inflater,
@Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_artist, container, false);
mRecyclerView = view.findViewById(R.id.fragment_artist_recycler_view);
mRecyclerView.setHasFixedSize(true);
mRecyclerView.setAdapter(new ArtistAdapter(requireContext()));
mRecyclerView.addItemDecoration(new SpaceItemDecoration(4, 16));
GridLayoutManager gridLayoutManager = (GridLayoutManager) mRecyclerView.getLayoutManager();
gridLayoutManager.setSpanSizeLookup(
new HeaderSpanSizeLookup(gridLayoutManager.getSpanCount()));
// TODO Enable view caching
//mRecyclerView.setItemViewCacheSize(0);
//mRecyclerView.setRecycledViewPool(Globals.getRecycledViewPool(requireContext()));
return view;
}
private static class ArtistAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>
implements MediaDb.UpdateCallback {
private final MediaDb mMediaDb;
private final List<Artist> mArtists; // TODO Use android.support.v7.util.SortedList/android.support.v7.widget.util.SortedListAdapterCallback instead
private ArtistAdapter(@NonNull Context context) {
setHasStableIds(true);
mMediaDb = Globals.getMediaDb(context);
mArtists = mMediaDb.getArtists();
}
public void onAttachedToRecyclerView(@NonNull RecyclerView recyclerView) {
mMediaDb.addArtistUpdateCallback(this);
}
public void onDetachedFromRecyclerView(@NonNull RecyclerView recyclerView) {
mMediaDb.removeArtistUpdateCallback(this);
}
@Override
public @NonNull RecyclerView.ViewHolder onCreateViewHolder(
@NonNull ViewGroup parent, int viewType) {
if (viewType == R.layout.header) {
return new RecyclerView.ViewHolder(LayoutInflater.from(parent.getContext())
.inflate(viewType, parent, false)) { };
} else {
return new ArtistViewHolder(LayoutInflater.from(parent.getContext())
.inflate(viewType, parent, false));
}
}
@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
if (position == 0) {
// TODO Handle header view
} else {
Artist artist = mArtists.get(position - 1);
mMediaDb.loadData(artist); // TODO Where should we call this? In bind()?
((ArtistViewHolder) holder).bind(artist);
}
}
@Override
public int getItemCount() {
return mArtists.size() + 1;
}
@Override
public long getItemId(int position) {
return position == 0 ? -1 : mArtists.get(position - 1).getId();
}
@Override
public int getItemViewType(int position) {
return position == 0 ? R.layout.header : R.layout.artist;
}
@Override
public void onItemsInserted(int index, int count) {
notifyItemRangeInserted(index + 1, count);
}
@Override
public void onItemsUpdated(int index, int count) {
notifyItemRangeChanged(index + 1, count);
}
@Override
public void onItemsRemoved(int index, int count) {
notifyItemRangeRemoved(index + 1, count);
}
}
private static class ArtistViewHolder extends RecyclerView.ViewHolder {
private ArtistViewHolder(@NonNull View itemView) {
super(itemView);
}
private void bind(@NonNull Artist artist) {
ImageView imageView = itemView.findViewById(R.id.artist_image);
TextView nameView = itemView.findViewById(R.id.artist_name);
// TODO This should be artist head shot rather than album art
Uri albumArtUri = null;
List<Album> albums = artist.getAlbums();
for (Album album : albums) {
if (album.getAlbumArtUri() != null) {
albumArtUri = album.getAlbumArtUri();
break;
}
}
imageView.setImageURI(albumArtUri);
nameView.setText(artist.getName());
itemView.setOnClickListener((view) ->
ArtistDetailsActivity.start(view.getContext(), artist));
}
}
private static class SpaceItemDecoration extends RecyclerView.ItemDecoration {
private final int mXOffset;
private final int mYOffset;
private SpaceItemDecoration(int xOffset, int yOffset) {
mXOffset = xOffset;
mYOffset = yOffset;
}
@Override
public void getItemOffsets(@NonNull Rect outRect, @NonNull View view, @NonNull RecyclerView parent, @NonNull RecyclerView.State state) {
DisplayMetrics displayMetrics = new DisplayMetrics();
ViewCompat.getDisplay(parent).getMetrics(displayMetrics);
outRect.left = outRect.right = (int) Math.ceil(mXOffset * displayMetrics.density);
if (parent.getChildAdapterPosition(view) > 0) {
outRect.bottom = (int) Math.ceil(mYOffset * displayMetrics.density);
}
}
}
private static class HeaderSpanSizeLookup extends GridLayoutManager.SpanSizeLookup {
private final int mSpanCount;
private HeaderSpanSizeLookup(int spanCount) {
mSpanCount = spanCount;
}
@Override
public int getSpanSize(int position) {
return position == 0 ? mSpanCount : 1;
}
@Override
public int getSpanIndex(int position, int spanCount) {
return position == 0 ? 0 : (position - 1) % spanCount;
}
@Override
public int getSpanGroupIndex(int adapterPosition, int spanCount) {
return adapterPosition == 0 ? 0 : ((adapterPosition - 1) / spanCount) + 1;
}
}
}
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