Android 照片旋轉

Bitmap bm0 = BitmapFactory.decodeByteArray(data, 0, data.length);
Matrix m = new Matrix();
m.setRotate(90,(float) bm0.getWidth() / 2, (float) bm0.getHeight() / 2);
final Bitmap bm = Bitmap.createBitmap(bm0, 0, 0, bm0.getWidth(), bm0.getHeight(), m, true);