1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
/*
* Copyright (C) 2012 Andrew Neal 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.andrew.apollo.loaders;
import android.content.Context;
import android.database.Cursor;
import android.provider.BaseColumns;
import android.provider.MediaStore;
import android.provider.MediaStore.Audio.AudioColumns;
import com.andrew.apollo.model.Song;
import com.andrew.apollo.utils.Lists;
import com.andrew.apollo.utils.PreferenceUtils;
import java.util.ArrayList;
import java.util.List;
/**
* Used to query {@link MediaStore.Audio.Media.EXTERNAL_CONTENT_URI} and return
* the songs for a particular artist.
*
* @author Andrew Neal (andrewdneal@gmail.com)
*/
public class ArtistSongLoader extends WrappedAsyncTaskLoader<List<Song>> {
/**
* The result
*/
private final ArrayList<Song> mSongList = Lists.newArrayList();
/**
* The {@link Cursor} used to run the query.
*/
private Cursor mCursor;
/**
* The Id of the artist the songs belong to.
*/
private final Long mArtistID;
/**
* Constructor of <code>ArtistSongLoader</code>
*
* @param context The {@link Context} to use.
* @param artistId The Id of the artist the songs belong to.
*/
public ArtistSongLoader(final Context context, final Long artistId) {
super(context);
mArtistID = artistId;
}
/**
* {@inheritDoc}
*/
@Override
public List<Song> loadInBackground() {
// Create the Cursor
mCursor = makeArtistSongCursor(getContext(), mArtistID);
// Gather the data
if (mCursor != null && mCursor.moveToFirst()) {
do {
// Copy the song Id
final long id = mCursor.getLong(0);
// Copy the song name
final String songName = mCursor.getString(1);
// Copy the artist name
final String artist = mCursor.getString(2);
// Copy the album name
final String album = mCursor.getString(3);
// Create a new song
final Song song = new Song(id, songName, artist, album, -1);
// Add everything up
mSongList.add(song);
} while (mCursor.moveToNext());
}
// Close the cursor
if (mCursor != null) {
mCursor.close();
mCursor = null;
}
return mSongList;
}
/**
* @param context The {@link Context} to use.
* @param artistId The Id of the artist the songs belong to.
* @return The {@link Cursor} used to run the query.
*/
public static final Cursor makeArtistSongCursor(final Context context, final Long artistId) {
// Match the songs up with the artist
final StringBuilder selection = new StringBuilder();
selection.append(AudioColumns.IS_MUSIC + "=1");
selection.append(" AND " + AudioColumns.TITLE + " != ''");
selection.append(" AND " + AudioColumns.ARTIST_ID + "=" + artistId);
return context.getContentResolver().query(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
new String[] {
/* 0 */
BaseColumns._ID,
/* 1 */
AudioColumns.TITLE,
/* 2 */
AudioColumns.ARTIST,
/* 3 */
AudioColumns.ALBUM
}, selection.toString(), null,
PreferenceUtils.getInstance(context).getArtistSongSortOrder());
}
}
|
