Fix Android image rotation issue when compressing gallery and camera …

…images (#379)

When using the image compression options, the returned resized image orientation differed from the original image. This caused selected images to often be rotated.

Original issue thread:
#379

android/src/main/java/com/reactnative/ivpusic/imagepicker/Compression.java

@@ -3,6 +3,8 @@
 import android.app.Activity;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
+import android.graphics.Matrix;
+import android.media.ExifInterface;
 import android.os.Environment;
 import android.util.Log;
 
@@ -30,6 +32,14 @@ File resize(String originalImagePath, int maxWidth, int maxHeight, int quality)
         int width = original.getWidth();
         int height = original.getHeight();
 
+        // Use original image exif orientation data to preserve image orientation for the resized bitmap
+        ExifInterface originalExif = new ExifInterface(originalImagePath);
+        int originalOrientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, 1);
+
+        Matrix rotationMatrix = new Matrix();
+        int rotationAngleInDegrees = getRotationInDegreesForOrientationTag(originalOrientation);
+        rotationMatrix.postRotate(rotationAngleInDegrees);
+
         float ratioBitmap = (float) width / (float) height;
         float ratioMax = (float) maxWidth / (float) maxHeight;
 
@@ -43,6 +53,7 @@ File resize(String originalImagePath, int maxWidth, int maxHeight, int quality)
         }
 
         Bitmap resized = Bitmap.createScaledBitmap(original, finalWidth, finalHeight, true);
+        resized = Bitmap.createBitmap(resized, 0, 0, finalWidth, finalHeight, rotationMatrix, true);
         File resizeImageFile = new File(Environment.getExternalStoragePublicDirectory(
                 Environment.DIRECTORY_PICTURES), UUID.randomUUID() + ".jpg");
 
@@ -56,6 +67,19 @@ File resize(String originalImagePath, int maxWidth, int maxHeight, int quality)
         return resizeImageFile;
     }
 
+    int getRotationInDegreesForOrientationTag(int orientationTag) {
+      switch(orientationTag){
+        case ExifInterface.ORIENTATION_ROTATE_90:
+          return 90;
+        case ExifInterface.ORIENTATION_ROTATE_270:
+          return -90;
+        case ExifInterface.ORIENTATION_ROTATE_180:
+          return 180;
+        default:
+          return 0;
+      }
+    }
+
     File compressImage(final ReadableMap options, final String originalImagePath, final BitmapFactory.Options bitmapOptions) throws IOException {
         Integer maxWidth = options.hasKey("compressImageMaxWidth") ? options.getInt("compressImageMaxWidth") : null;
         Integer maxHeight = options.hasKey("compressImageMaxHeight") ? options.getInt("compressImageMaxHeight") : null;