How to get the Correct orientation of the image selected from the Default Image gallery

Question

I have gone through some of the links to get the correct image orientation of the image selected from the default image gallery to be worked standard in all devices the exif tag always returns 0.

EXIF orientation tag value always 0 for image taken with portrait camera app android

Exif orientation tag returns 0

Exif data TAG_ORIENTATION always 0

http://mobisocial.stanford.edu/news/2011/08/rotating-images-in-android/

How to get an exact solution that will work on all devices?

Answer 1

If the image(photo) was taken by a program made by you, you must set Parameters.setRotation with the correct rotation value.

This, depending of camera drive, rotates the image before save or save the rotation value to exif TAG_ORIENTATION.

Therefore, if TAG_ORIENTATION is null or zero, the image are in the correct orientation, otherwise you must rotate image according the value in TAG_ORIENTATION.

CODE

Get orientation from EXIF:

ExifInterface exif = null;
try {
    exif = new ExifInterface(path);
} catch (IOException e) {
    e.printStackTrace();
}  
int orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, 
                                       ExifInterface.ORIENTATION_UNDEFINED);

Get bitmap rotated:

Bitmap bmRotated = rotateBitmap(bitmap, orientation);  

Method to rotate bitmap:

public static Bitmap rotateBitmap(Bitmap bitmap, int orientation) {

    Matrix matrix = new Matrix();
    switch (orientation) {
        case ExifInterface.ORIENTATION_NORMAL:
            return bitmap;
        case ExifInterface.ORIENTATION_FLIP_HORIZONTAL:
            matrix.setScale(-1, 1);
            break;
        case ExifInterface.ORIENTATION_ROTATE_180:
            matrix.setRotate(180);
            break;
        case ExifInterface.ORIENTATION_FLIP_VERTICAL:
            matrix.setRotate(180);
            matrix.postScale(-1, 1);
            break;
        case ExifInterface.ORIENTATION_TRANSPOSE:
            matrix.setRotate(90);
            matrix.postScale(-1, 1);
            break;
       case ExifInterface.ORIENTATION_ROTATE_90:
           matrix.setRotate(90);
           break;
       case ExifInterface.ORIENTATION_TRANSVERSE:
           matrix.setRotate(-90);
           matrix.postScale(-1, 1);
           break;
       case ExifInterface.ORIENTATION_ROTATE_270:
           matrix.setRotate(-90);
           break;
       default:
           return bitmap;
    }
    try {
        Bitmap bmRotated = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
        bitmap.recycle();
        return bmRotated;
    }
    catch (OutOfMemoryError e) {
        e.printStackTrace();
        return null;
    }
}

Answer 2

For me ExifInterface worked quite well like this:

ExifInterface exifInterface = new ExifInterface(imagePath);
degree = Integer.parseInt(exifInterface.getAttribute(ExifInterface.TAG_ORIENTATION));

or you can try to get the details of image using MediaStore like this:

String[] orientationColumn = {MediaStore.Images.Media.ORIENTATION};
Cursor cur = managedQuery(imageUri, orientationColumn, null, null, null);
int orientation = -1;
if (cur != null && cur.moveToFirst()) {
    orientation = cur.getInt(cur.getColumnIndex(orientationColumn[0]));
} 

Similar Solution: ExifInterface always returns 1

Hope it helps.. :)

Answer 3

I followed last answer and I tried hard to create a system to manage pictures, rotate, resize, cache and load into ImageViews and I can tell it is a hell. Even when all it was done it crashes sometimes cause OutOfMemory in some devices. Answer is correct but it is difficult to manage Bitmaps in Android.

My point is do not reinvent the wheel, it has a perfect design. Google itself encourage you to use Glide. It works in one line, super easy to use, lightweight in size and functions number, it manage EXIF by default, and it use memory like a charm.. It is simply black magic coded ;)

I'm not sure if Picasso also manages EXIF, but there is a quick intro to both of them:

https://inthecheesefactory.com/blog/get-to-know-glide-recommended-by-google/en

My Advice: do not waste your time and use them. You can solve your problem in one line:

Glide.with(context).load("http://i.imgur.com/DvpvklR.png").into(imageView);

Answer 4

For those who come along this post, make sure to use the exifinterface from the Android Support Library that was introduced in December 2016:

compile "com.android.support:exifinterface:25.1.0" // or newer

Details about this library can be found in the according Android Developers Blog post: Introducing the ExifInterface Support Library

They also included a sample code for dealing with rotation information stored in the exif interface:

int rotation = 0;
int orientation = exifInterface.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);

switch (orientation) {
   case ExifInterface.ORIENTATION_ROTATE_90:
     rotation = 90;
     break;
  case ExifInterface.ORIENTATION_ROTATE_180:
     rotation = 180;
     break;
  case ExifInterface.ORIENTATION_ROTATE_270:
     rotation = 270;
     break;
}