react-native-image-editor: Could not determine MIME TYPE on Android 10

Bug report

Summary

Our bug report system reported a missing MIME type on a Samsung Galaxy A31 SM-A315G phone running Android 10. The exact error message is

Error: Could not determine MIME type

Environment info

react-native info output:

System:
    OS: macOS 10.15.6
    CPU: (8) x64 Intel(R) Core(TM) i7-7820HQ CPU @ 2.90GHz
    Memory: 56.27 MB / 16.00 GB
    Shell: 5.7.1 - /bin/zsh
  Binaries:
    Node: 12.16.2 - /usr/local/bin/node
    Yarn: 1.22.4 - /usr/local/bin/yarn
    npm: 6.14.5 - /usr/local/bin/npm
    Watchman: 4.9.0 - /usr/local/bin/watchman
  SDKs:
    iOS SDK:
      Platforms: iOS 13.6, DriverKit 19.0, macOS 10.15, tvOS 13.4, watchOS 6.2
    Android SDK:
      API Levels: 22, 23, 24, 25, 26, 27, 28, 29
      Build Tools: 23.0.1, 23.0.2, 25.0.0, 25.0.2, 25.0.3, 26.0.1, 26.0.2, 27.0.2, 27.0.3, 28.0.3, 29.0.0, 29.0.2
      System Images: android-24 | Google Play Intel x86 Atom, android-25 | Google APIs Intel x86 Atom_64, android-26 | Google APIs Intel x86 Atom, android-26 | Google Play Intel x86 Atom, android-28 | Google APIs Intel x86 Atom
      Android NDK: 21.0.6113669
  IDEs:
    Android Studio: 4.0 AI-193.6911.18.40.6626763
    Xcode: 11.6/11E708 - /usr/bin/xcodebuild
  npmGlobalPackages:
    react-native-cli: 2.0.1
    react-native-create-bridge: 2.0.1
    react-native-git-upgrade: 0.2.7
    react-native-rename: 2.1.5

Library version: 2.3.0

Steps to reproduce

Take picture using react-native-camera
Wait until we have a uri from the taken picture
Calculate the cropping data
Crop picture /react-native-image-editor

Describe what you expected to happen:

Take picture
Wait until we have a uri
Calculate the cropping data
Crop picture (determine the MIME type 100%)

Reproducible sample code

I can see that the error comes from this method

@Override
    protected void doInBackgroundGuarded(Void... params) {
      try {
        BitmapFactory.Options outOptions = new BitmapFactory.Options();
        ...
        String mimeType = outOptions.outMimeType;
        if (mimeType == null || mimeType.isEmpty()) {
          throw new IOException("Could not determine MIME type");
        }
        ...
      } catch (Exception e) {
        mPromise.reject(e);
      }
    }

but I’m wondering why the MIME TYPE is empty or null on some phones but not the other and I’m wondering if the extraction of the MIME TYPE can be handled differently? Something like that:

public static String getMimeTypeFromFile(String filePath) {
    BitmapFactory.Options outOptions = new BitmapFactory.Options();
    outOptions.inJustDecodeBounds = true;
    BitmapFactory.decodeFile(filePath, outOptions);
    return opt.outMimeType;
}

According to the docs the official way would be via ContentResolver so something like that would work too I guess

BitmapFactory.Options outOptions = new BitmapFactory.Options();
outOptions.inJustDecodeBounds = true;
InputStream inputStream = mContext.getContentResolver().openInputStream(filePath);
BitmapFactory.decodeStream(inputStream, null, opt);
inputStream.close();

String mimeType = opt.outMimeType;

About this issue

Original URL
State: closed
Created 4 years ago
Reactions: 14
Comments: 19

Commits related to this issue

Could not determine MIME TYPE on Android 10 #73 — committed to MikePodgorniy/react-native-image-editor by MikePodgorniy 3 years ago

Most upvoted comments

I created a patch that fixes the issue, I am not sure why decodeRegion does not give out mime type, but it well could be an issue with the underlying vendor implementation, and am not sure if decodeRegion is guaranteed to fill outMimeType always.

If mime type is null, we fall back to the normal way of reading the mime type, so this patch is quite safe and will affect only people who have problems.

This patch was done for 2.3.0 version for @react-native-community/image-editor, using patch-package.

diff --git a/node_modules/@react-native-community/image-editor/android/src/main/java/com/reactnativecommunity/imageeditor/ImageEditorModule.java b/node_modules/@react-native-community/image-editor/android/src/main/java/com/reactnativecommunity/imageeditor/ImageEditorModule.java
index c053ab4..f40883c 100644
--- a/node_modules/@react-native-community/image-editor/android/src/main/java/com/reactnativecommunity/imageeditor/ImageEditorModule.java
+++ b/node_modules/@react-native-community/image-editor/android/src/main/java/com/reactnativecommunity/imageeditor/ImageEditorModule.java
@@ -255,6 +255,23 @@ public class ImageEditorModule extends ReactContextBaseJavaModule {
       return stream;
     }
 
+    private String getMimeType() throws IOException {
+
+      BitmapFactory.Options outOptions = new BitmapFactory.Options();
+      outOptions.inJustDecodeBounds = true;
+
+      InputStream inputStream = openBitmapInputStream();
+
+      try {
+        BitmapFactory.decodeStream(inputStream, null, outOptions);
+        return outOptions.outMimeType;
+      } finally {
+        if (inputStream != null) {
+          inputStream.close();
+        }
+      }
+    }
+
     @Override
     protected void doInBackgroundGuarded(Void... params) {
       try {
@@ -272,7 +289,11 @@ public class ImageEditorModule extends ReactContextBaseJavaModule {
 
         String mimeType = outOptions.outMimeType;
         if (mimeType == null || mimeType.isEmpty()) {
-          throw new IOException("Could not determine MIME type");
+          mimeType = getMimeType();
+
+          if (mimeType == null || mimeType.isEmpty()) {
+            throw new IOException("Could not determine MIME type");
+          }
         }
 
         File tempFile = createTempFile(mContext, mimeType);

chr4ss1 on Jan 13, 2021

Any update on this?

davidwico on Dec 15, 2020

I am also facing this error - are there any plans to solve this one?

piotrponikowski on Aug 4, 2020