获取本地音乐文件的专辑，图片，音乐信息

今天跟大家分享一下如何获取本地音乐文件中的各种音乐信息，包括音乐的歌名，歌手，曲长，专辑，专辑图片

private String tilte;//歌名
private String artist;//歌手
private Bitmap bitmap;//专辑海报
private long duration;//时长
private String path_music;//当前播放的歌曲路径

ContentResolver musicResolver = getContentResolver();
Cursor cursor = null;

cursor = musicResolver.query(
MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, null, MediaStore.Audio.Media.DATA + "= ? ",
new String[]{path_music}, null);

if (cursor != null && cursor.getCount() > 0) {
cursor.moveToFirst();

long ID = cursor.getLong(cursor
.getColumnIndex(MediaStore.Audio.Media._ID));    //音乐id
tilte = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.TITLE));
artist = cursor.getString(cursor
.getColumnIndex(MediaStore.Audio.Media.ARTIST)); // 艺术家
String album = cursor.getString(cursor
.getColumnIndex(MediaStore.Audio.Media.ALBUM));    //专辑
duration = cursor.getLong(cursor
.getColumnIndex(MediaStore.Audio.Media.DURATION)); // 时长
long size = cursor.getLong(cursor
.getColumnIndex(MediaStore.Audio.Media.SIZE));
String url = cursor.getString(cursor
.getColumnIndex(MediaStore.Audio.Media.DATA));

long albumId = cursor.getInt(cursor.getColumnIndex(MediaStore.Audio.Media.ALBUM_ID));

bitmap = getMusicBitemp(getApplicationContext(), ID, albumId);

下面还有getMusicBitmap方法

private static final Uri sArtworkUri = Uri
.parse("content://media/external/audio/albumart");

public static Bitmap getMusicBitemp(Context context, long songid,
long albumid) {
Bitmap bm = null;
// 专辑id和歌曲id小于0说明没有专辑、歌曲，并抛出异常
if (albumid < 0 && songid < 0) {
throw new IllegalArgumentException(
"Must specify an album or a song id");
}
try {
if (albumid < 0) {
Uri uri = Uri.parse("content://media/external/audio/media/"
+ songid + "/albumart");
ParcelFileDescriptor pfd = context.getContentResolver()
.openFileDescriptor(uri, "r");
if (pfd != null) {
FileDescriptor fd = pfd.getFileDescriptor();
bm = BitmapFactory.decodeFileDescriptor(fd);
}
} else {
Uri uri = ContentUris.withAppendedId(sArtworkUri, albumid);
ParcelFileDescriptor pfd = context.getContentResolver()
.openFileDescriptor(uri, "r");
if (pfd != null) {
FileDescriptor fd = pfd.getFileDescriptor();
bm = BitmapFactory.decodeFileDescriptor(fd);

} else {
return null;
}
}
} catch (FileNotFoundException ex) {
}
//如果获取的bitmap为空，则返回一个默认的bitmap
        if (bm == null) {
Resources resources = context.getResources();
Drawable drawable = resources.getDrawable(R.drawable.back_iv);
//Drawable 转 Bitmap
BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;
bm = bitmapDrawable.getBitmap();
}

return Bitmap.createScaledBitmap(bm, 150, 150, true);
}

除去上面使用到的 还有

String year = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.YEAR));//获取发行年份

Int size = cursor.getLong(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.SIZE));//获取歌曲文件大小

等等。