获取图片当前旋转状态

今日开发过程中遇见从相册选择或者自拍照片，显示时为横向。故封装如下代码，希望对大家有所帮助。

function getImgOrientation (filePath) {  
            var ExifInterface = plus.android.importClass("android.media.ExifInterface");  
            var exifInterface = new ExifInterface(filePath.replace("file:///", ""));  
            var orientation = exifInterface.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);  
            var degree = 0;  
            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;  
            }  
            return degree;  
        }