From b0bffa176ae700a0a2bb5c32226551ea53ef8ba9 Mon Sep 17 00:00:00 2001
From: Thibault Deckers <thibault.deckers@gmail.com>
Date: Sat, 4 Apr 2020 19:04:56 +0900
Subject: [PATCH] rotate thumbnails according to exif on older devices

---
 .../thibault/aves/channelhandlers/ImageDecodeTask.java | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/android/app/src/main/java/deckers/thibault/aves/channelhandlers/ImageDecodeTask.java b/android/app/src/main/java/deckers/thibault/aves/channelhandlers/ImageDecodeTask.java
index cd8fd443a..f42b4d1e1 100644
--- a/android/app/src/main/java/deckers/thibault/aves/channelhandlers/ImageDecodeTask.java
+++ b/android/app/src/main/java/deckers/thibault/aves/channelhandlers/ImageDecodeTask.java
@@ -6,6 +6,7 @@ import android.app.Activity;
 import android.content.ContentResolver;
 import android.content.ContentUris;
 import android.graphics.Bitmap;
+import android.graphics.Matrix;
 import android.os.AsyncTask;
 import android.os.Build;
 import android.provider.MediaStore;
@@ -111,7 +112,14 @@ public class ImageDecodeTask extends AsyncTask<ImageDecodeTask.Params, Void, Ima
             if (entry.isVideo()) {
                 return MediaStore.Video.Thumbnails.getThumbnail(resolver, contentId, MediaStore.Video.Thumbnails.MINI_KIND, null);
             } else {
-                return MediaStore.Images.Thumbnails.getThumbnail(resolver, contentId, MediaStore.Images.Thumbnails.MINI_KIND, null);
+                Bitmap bitmap = MediaStore.Images.Thumbnails.getThumbnail(resolver, contentId, MediaStore.Images.Thumbnails.MINI_KIND, null);
+                // from Android Q, returned thumbnail is already rotated according to EXIF orientation
+                if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q && bitmap != null && entry.orientationDegrees != 0) {
+                    Matrix matrix = new Matrix();
+                    matrix.postRotate(entry.orientationDegrees);
+                    bitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
+                }
+                return bitmap;
             }
         } catch (Exception e) {
             Log.e(LOG_TAG, "failed to get thumbnail for uri=" + entry.uri, e);