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Genres tab

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Eugene Cheung 2017-09-02 19:54:57 -04:00
commit 944b5fc1fa
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16 changed files with 739 additions and 28 deletions
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129
app/src/main/java/com/kabouzeid/gramophone/loader/GenreLoader.java Normal file
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@ -0,0 +1,129 @@
package com.kabouzeid.gramophone.loader;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.provider.MediaStore.Audio.Genres;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import com.kabouzeid.gramophone.R;
import com.kabouzeid.gramophone.model.Genre;
import com.kabouzeid.gramophone.model.Song;
import com.kabouzeid.gramophone.util.PreferenceUtil;
import java.util.ArrayList;
public class GenreLoader {
@NonNull
public static ArrayList<Genre> getAllGenres(@NonNull final Context context) {
final String[] projection = new String[]{
Genres._ID,
Genres.NAME
};
final String selection = Genres._ID + " IN" +
" (SELECT " + Genres.Members.GENRE_ID + " FROM audio_genres_map WHERE " + Genres.Members.AUDIO_ID + " IN" +
" (SELECT " + Genres._ID + " FROM audio_meta WHERE " + SongLoader.BASE_SELECTION + "))";
final Cursor cursor = context.getContentResolver().query(
Genres.EXTERNAL_CONTENT_URI,
projection, selection, null, PreferenceUtil.getInstance(context).getGenreSortOrder());
return getGenresFromCursor(context, cursor);
}
@NonNull
public static ArrayList<Song> getSongs(@NonNull final Context context, final int genreId) {
// The genres table only stores songs that have a genre specified,
// so we need to get songs without a genre a different way.
if (genreId == -1) {
return getSongsWithNoGenre(context);
}
final Cursor cursor = context.getContentResolver().query(
Genres.Members.getContentUri("external", genreId),
SongLoader.BASE_PROJECTION, SongLoader.BASE_SELECTION, null, null);
return SongLoader.getSongs(cursor);
}
@NonNull
private static ArrayList<Genre> getGenresFromCursor(@NonNull final Context context, @Nullable final Cursor cursor) {
final ArrayList<Genre> genres = new ArrayList<>();
if (hasSongsWithNoGenre(context)) {
genres.add(new Genre(context.getResources().getString(R.string.unknown_genre)));
}
if (cursor != null) {
if (cursor.moveToFirst()) {
do {
genres.add(getGenreFromCursor(cursor));
} while (cursor.moveToNext());
}
cursor.close();
}
return genres;
}
@NonNull
private static Genre getGenreFromCursor(@NonNull final Cursor cursor) {
final int id = cursor.getInt(0);
final String name = cursor.getString(1);
return new Genre(id, name);
}
@NonNull
private static ArrayList<Song> getSongsWithNoGenre(@NonNull final Context context) {
final Cursor cursor = makeAllSongsWithGenreCursor(context);
ArrayList<Song> songs = new ArrayList<>();
final int[] songIds = getSongIdsFromCursor(cursor);
if (songIds.length > 0) {
songs = SongLoader.getSongsNotIn(context, songIds);
}
return songs;
}
private static int[] getSongIdsFromCursor(@Nullable final Cursor cursor) {
if (cursor == null) {
return new int[]{};
}
int[] songIds = new int[cursor.getCount()];
if (cursor.moveToFirst()) {
int i = 0;
do {
songIds[i] = cursor.getInt(0);
i++;
} while (cursor.moveToNext());
}
cursor.close();
return songIds;
}
private static boolean hasSongsWithNoGenre(@NonNull final Context context) {
final Cursor allSongsCursor = SongLoader.makeSongCursor(context, null, null);
final Cursor allSongsWithGenreCursor = makeAllSongsWithGenreCursor(context);
if (allSongsCursor == null || allSongsWithGenreCursor == null) {
return false;
}
final boolean hasSongsWithNoGenre = allSongsCursor.getCount() > allSongsWithGenreCursor.getCount();
allSongsCursor.close();
allSongsWithGenreCursor.close();
return hasSongsWithNoGenre;
}
@Nullable
private static Cursor makeAllSongsWithGenreCursor(@NonNull final Context context) {
try {
return context.getContentResolver().query(
Uri.parse("content://media/external/audio/genres/all/members"),
new String[]{Genres.Members.AUDIO_ID}, null, null, null);
} catch (SecurityException e) {
return null;
}
}
}

40
app/src/main/java/com/kabouzeid/gramophone/loader/SongLoader.java
View file

@ -12,12 +12,26 @@ import com.kabouzeid.gramophone.model.Song;
import com.kabouzeid.gramophone.util.PreferenceUtil;
import java.util.ArrayList;
import java.util.Arrays;
/**
* @author Karim Abou Zeid (kabouzeid)
*/
public class SongLoader {
protected static final String BASE_SELECTION = AudioColumns.IS_MUSIC + "=1" + " AND " + AudioColumns.TITLE + " != ''";
protected static final String[] BASE_PROJECTION = new String[]{
BaseColumns._ID, // 0
AudioColumns.TITLE, // 1
AudioColumns.TRACK, // 2
AudioColumns.YEAR, // 3
AudioColumns.DURATION, // 4
AudioColumns.DATA, // 5
AudioColumns.DATE_MODIFIED, // 6
AudioColumns.ALBUM_ID, // 7
AudioColumns.ALBUM, // 8
AudioColumns.ARTIST_ID, // 9
AudioColumns.ARTIST, // 10
};
@NonNull
public static ArrayList<Song> getAllSongs(@NonNull Context context) {
@ -31,6 +45,13 @@ public class SongLoader {
return getSongs(cursor);
}
@NonNull
public static ArrayList<Song> getSongsNotIn(@NonNull final Context context, final int[] query) {
final String ids = convertArrayToQueryList(query);
Cursor cursor = makeSongCursor(context, AudioColumns._ID + " NOT IN " + ids, null);
return getSongs(cursor);
}
@NonNull
public static Song getSong(@NonNull final Context context, final int queryId) {
Cursor cursor = makeSongCursor(context, AudioColumns._ID + "=?", new String[]{String.valueOf(queryId)});
@ -96,22 +117,13 @@ public class SongLoader {
try {
return context.getContentResolver().query(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
new String[]{
BaseColumns._ID,// 0
AudioColumns.TITLE,// 1
AudioColumns.TRACK,// 2
AudioColumns.YEAR,// 3
AudioColumns.DURATION,// 4
AudioColumns.DATA,// 5
AudioColumns.DATE_MODIFIED,// 6
AudioColumns.ALBUM_ID,// 7
AudioColumns.ALBUM,// 8
AudioColumns.ARTIST_ID,// 9
AudioColumns.ARTIST,// 10
}, baseSelection, selectionValues, sortOrder);
BASE_PROJECTION, baseSelection, selectionValues, sortOrder);
} catch (SecurityException e) {
return null;
}
}
private static String convertArrayToQueryList(final int[] array) {
return "(" + Arrays.toString(array).replaceAll("\\[|\\]|\\s", "") + ")";
}
}