请注意,我已经在这里和其他网站上遇到过类似的问题及其答案。我还有一个适用于某些设备的解决方案(我的 G2X 运行 CyanogenMod 7.1,我妻子的 HD2 运行自定义 ROM 和模拟器运行 Android 2.1)。但它不适用于我运行 CyanogenMod 的 Nook。
我的问题是:在所有 android 设备上获取专辑封面的最强大和最通用的方法是什么?特定设备、版本或音乐应用程序的陷阱是什么(我不是指第三方播放器,我是指 Google 音乐与旧的音乐客户端)?我目前的代码是:
// Is this what's making my code fail on other devices?
public final Uri sArtworkUri = Uri.parse("content://media/external/audio/albumart");
// This works, and well on all devices
private int[] getAlbumIds(ContentResolver contentResolver)
{
List<Integer> result = new ArrayList<Integer>();
Cursor cursor = contentResolver.query(MediaStore.Audio.Media.getContentUri("external"), new String[]{MediaStore.Audio.Media.ALBUM_ID}, null, null, null);
if (cursor.moveToFirst())
{
do{
int albumId = cursor.getInt(0);
if (!result.contains(albumId))
result.add(albumId);
} while (cursor.moveToNext());
}
int[] resultArray = new int[result.size()];
for (int i = 0; i < result.size(); i++)
resultArray[i] = result.get(i);
return resultArray;
}
// This is the bit I want to make more robust, make sure that it works on all devices
private Shader getAlbumArt(ContentResolver contentResolver, int albumId, int width, int height)
{
Uri uri = ContentUris.withAppendedId(sArtworkUri, albumId);
InputStream input = null;
try {
input = contentResolver.openInputStream(uri);
if (input == null)
return null;
Bitmap artwork = BitmapFactory.decodeStream(input);
input.close();
if (artwork == null)
return null;
Bitmap scaled = Bitmap.createScaledBitmap(artwork, width, height, true);
if (scaled == null)
return null;
if (scaled != artwork)
artwork.recycle();
artwork = scaled;
return new BitmapShader(artwork, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
提前致谢, 阿南特