撮影された画像の傾きを返すメソッド

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private static int GetImageOrientation(Context context, Uri uri) {
	ContentResolver contentResolver = context.getContentResolver();
	String[] columns = { MediaStore.Images.Media.DATA };
	Cursor cursor = contentResolver.query(uri, columns, null, null, null);
	cursor.moveToFirst();
	String path = cursor.getString(0);
	cursor.close();

	int degree = 0;
	ExifInterface exifInterface = null;
	try {
		exifInterface = new ExifInterface(path);
	} catch (IOException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
	int orientation = exifInterface
			.getAttributeInt(ExifInterface.TAG_ORIENTATION,
					ExifInterface.ORIENTATION_NORMAL);
	switch (orientation) {
	case ExifInterface.ORIENTATION_ROTATE_90:
		degree = 90;
		break;
	case ExifInterface.ORIENTATION_ROTATE_180:
		degree = 180;
		break;
	case ExifInterface.ORIENTATION_ROTATE_270:
		degree = 270;
		break;
	default:
		break;
	}
	return degree;
}