Google glass GDK - 通过MP3路径获取专辑图片

最新推荐文章于 2021-05-26 08:32:25 发布

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最新推荐文章于 2021-05-26 08:32:25 发布

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原文链接：http://www.cnblogs.com/ch3rry/p/3871387.html

本文提供了一段Java代码，用于从指定路径的MP3文件中读取专辑封面图片。该方法通过使用MediaMetadataRetriever类来获取嵌入在音频文件中的图片，并通过调整采样率以适应特定分辨率。

网上转的都太不靠谱了＝＝在一个MP3播放器里面挖了出来，用时就用上了～

 1     public static Bitmap getAlbumArtWork(String filePath) {
 2         try {
 3             MediaMetadataRetriever metaRetriver = new MediaMetadataRetriever();
 4             metaRetriver.setDataSource(filePath);
 5             byte[] album = metaRetriver.getEmbeddedPicture();
 6             if (album != null) {
 7                 BitmapFactory.Options opts = new BitmapFactory.Options();
 8                 opts.inJustDecodeBounds = true;
 9                 BitmapFactory.decodeByteArray(album, 0, album.length, opts);
10                 opts.inSampleSize = calculateInSampleSize(opts);
11                 opts.inJustDecodeBounds = false;
12                 return BitmapFactory.decodeByteArray(album, 0, album.length, opts);
13             }
14             return null;
15         } catch (Exception e) {
16             return null;
17         }
18     }   
19     public static int calculateInSampleSize(BitmapFactory.Options options) {
20         // Raw height and width of image
21         final int height = options.outHeight;
22         final int width = options.outWidth;
23         int inSampleSize = 1;
24         //Our height and width will always be the same since all glass has the same resolution, for now...
25         if (height > 360 || width > 640) {
26             final int halfHeight = height / 2;
27             final int halfWidth = width / 2;
28             // Calculate the largest inSampleSize value that is a power of 2 and keeps both
29             // height and width larger than the requested height and width.
30             while ((halfHeight / inSampleSize) > 360 && (halfWidth / inSampleSize) > 640) {
31                 inSampleSize *= 2;
32             }
33         }
34 
35         return inSampleSize;
36     }