Android 读取图片方向信息

public  int getExifOrientation(Stringfilepath) {

int degree = 0;

ExifInterface exif =null;

try {

exif = new ExifInterface(filepath);

} catch (IOExceptionex) {

// MmsLog.e(ISMS_TAG, "getExifOrientation():",ex);

}

if (exif !=null) {

int orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, -1);

if (orientation != -1) {

// We only recognize a subset of orientation tag values.

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;

}

}

}

returndegree;

}

调用方法，旋转

Bitmap result=BitmapFactory.decodeFile(imageUrl);

if(degree == 90 ||degree == 180 || degree == 270){

            //Roate preview icon according to exif orientation

            Matrix matrix = new Matrix();

            matrix.postRotate(degree);

            result = Bitmap.createBitmap(result,

                  0, 0, result.getWidth(), result.getHeight(), matrix, true);

        }