/** 批量向歌单添加音乐 */
public static void addSongListToPlaylist(
final Context context, final PlayList playlist, final ArrayList<Song> songs) {
Cursor cur =
context
.getContentResolver()
.query(
MediaStore.Audio.Playlists.Members.getContentUri(
"external", playlist.getmPlayListId()),
null,
null,
null,
MediaStore.Audio.Playlists.Members.TRACK + " ASC");
long count = 0;
if (cur.moveToLast()) {
count = cur.getLong(cur.getColumnIndex(MediaStore.Audio.Playlists.Members.TRACK));
}
cur.close();
ContentValues[] values = new ContentValues[songs.size()];
for (int i = 0; i < songs.size(); i++) {
values[i] = new ContentValues();
values[i].put(MediaStore.Audio.Playlists.Members.PLAY_ORDER, count + 1);
values[i].put(MediaStore.Audio.Playlists.Members.AUDIO_ID, songs.get(i).getmSongId());
}
Uri uri =
MediaStore.Audio.Playlists.Members.getContentUri("external", playlist.getmPlayListId());
ContentResolver resolver = context.getContentResolver();
resolver.bulkInsert(uri, values);
resolver.notifyChange(Uri.parse("content://media"), null);
}
/** 向歌单添加音乐 */
public static void addSongToPlaylist(
final Context context, final PlayList playlist, final Song song) {
Cursor cur =
context
.getContentResolver()
.query(
MediaStore.Audio.Playlists.Members.getContentUri(
"external", playlist.getmPlayListId()),
null,
null,
null,
MediaStore.Audio.Playlists.Members.TRACK + " ASC");
long count = 0;
if (cur.moveToLast()) {
count = cur.getLong(cur.getColumnIndex(MediaStore.Audio.Playlists.Members.TRACK));
}
cur.close();
ContentValues values = new ContentValues();
values.put(MediaStore.Audio.Playlists.Members.PLAY_ORDER, count + 1);
values.put(MediaStore.Audio.Playlists.Members.AUDIO_ID, song.getmSongId());
Uri uri =
MediaStore.Audio.Playlists.Members.getContentUri("external", playlist.getmPlayListId());
ContentResolver resolver = context.getContentResolver();
resolver.insert(uri, values);
resolver.notifyChange(Uri.parse("content://media"), null);
}
/** 获得播放清单里的所有歌曲 */
public static ArrayList<Song> getPlayListSongs(Context context, PlayList playList) {
ArrayList<Song> songs = new ArrayList<>();
Cursor cursor =
context
.getContentResolver()
.query(
MediaStore.Audio.Playlists.Members.getContentUri(
"external", playList.getmPlayListId()),
playListSongProjection,
MediaStore.Audio.Media.IS_MUSIC + " != 0",
null,
null);
for (int i = 0; i < cursor.getCount(); i++) {
cursor.moveToPosition(i);
Song song =
new Song(
cursor.getInt(cursor.getColumnIndex(MediaStore.Audio.Playlists.Members.AUDIO_ID)),
cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Playlists.Members.TITLE)),
cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Playlists.Members.ARTIST)),
cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Playlists.Members.ALBUM)),
cursor.getLong(cursor.getColumnIndex(MediaStore.Audio.Playlists.Members.DURATION)),
cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Playlists.Members.DATA)),
cursor.getInt(cursor.getColumnIndex(MediaStore.Audio.Playlists.Members.ALBUM_ID)),
cursor.getInt(cursor.getColumnIndex(MediaStore.Audio.Playlists.Members.ARTIST_ID)));
songs.add(song);
}
cursor.close();
return songs;
}
/** 检查输入歌单名称， 为空，或已经存在 */
public static String checkPlaylistName(Context context, String trimmedName) {
if (trimmedName.length() == 0) {
return context.getResources().getString(R.string.input_empty);
}
if (trimmedName.trim().length() == 0) {
return context.getResources().getString(R.string.input_empty);
}
for (PlayList playList : mPlayListLib) {
if (playList.getmPlayListName().equals(trimmedName)) {
return context.getResources().getString(R.string.input_exist);
}
}
return null;
}
/** 删除歌单 */
public static PlayList deletePlaylist(final Context context, final PlayList playlist) {
// 从MediaStore移除歌单
context
.getContentResolver()
.delete(
MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI,
MediaStore.Audio.Playlists._ID + "=?",
new String[] {playlist.getmPlayListId() + ""});
// 更新歌单
mPlayListLib.clear();
setPlayListLib(scanPlayList(context));
return playlist;
}