Flutter Image picker is already active, null exception

Question

In my flutter project I am getting exception whenever I am trying to pickup an image either from Camera or Gallery using the image_picker plugin of flutter.

For the very first time it asks for the permission and when I allow the camera it throws

java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.XmlResourceParser android.content.pm.ProviderInfo.loadXmlMetaData(android.content.pm.PackageManager, java.lang.String)' on a null object reference

After that, it throws an exception for every subsequent tries

PlatformException(already_active, Image picker is already active, null)

If I try to choose the camera or gallery even after restarting the app.

var imageSource;
if (source == CAMERA_SOURCE) {
    imageSource = ImageSource.camera;
} else {
    imageSource = ImageSource.gallery;
}

try {
     final file = await ImagePicker.pickImage(source: imageSource);
     if (file == null) {
     throw Exception('File is not available');
 }

Below are the dependencies:

cupertino_icons: ^0.1.2
firebase_auth: ^0.8.1
cloud_firestore: ^0.9.0+1
firebase_core: ^0.3.0+1
firebase_messaging: ^3.0.1
firebase_storage: ^2.0.1
intl_translation: ^0.17.3
http: ^0.12.0+1
xml: ^3.3.1
uuid: ^2.0.0
shared_preferences: ^0.5.1+1
flutter_staggered_grid_view: ^0.2.7
google_sign_in: ^4.0.1
flutter_signin_button: ^0.2.5
image_picker: ^0.5.0+2
mlkit: ^0.9.0
path_provider: ^0.5.0+1

Thanks for your time! I also tried to upgrade my flutter to the latest version.

Hey, Sam. Please edit your question and add some of your code so we can see what's going on. The functions that call the image picker, the button press etc. — George
It's been awhile but if you are stil interested on this topic, it seems to be a bug: github.com/flutter/flutter/issues/28550 — kokeksibir
Thanks for the reply. After upgrading flutter and dependencies and flutter clean made it working... — Sam

Sam Sam · Accepted Answer · 2019-03-28T00:42:57

Finally I was able to resolve it.

I updated all my dependencies and flutter SDK and then I did Flutter clean and it started working..

Thanks all for your time and help

Flutter Image picker is already active, null exception

7 Answers