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, Feb 17 '19 at 21:42
It's been awhile but if you are stil interested on this topic, it seems to be a bug: https://github.com/flutter/flutter/issues/28550 — kokeksibir, Mar 27 '19 at 21:22
Thanks for the reply. After upgrading flutter and dependencies and flutter clean made it working... — Sam, Mar 28 '19 at 00:41

score 5 · Answer 1 · answered Mar 28 '19 at 00:42

5

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

answered Mar 28 '19 at 00:42

Sam

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1

did you test it by uninstall the app and install it again? – Daniel Mana Jun 24 '19 at 08:48
1

Yes, It is working working after removing the app from the device and reinstalling.. – Sam Jun 24 '19 at 12:46

score 3 · Answer 2 · answered Mar 04 '21 at 10:06

3

Change in android/build.gradle classpath 'com.android.tools.build:gradle:3.5.4'

This worked for me.

answered Mar 04 '21 at 10:06

Yusuf

771
1
6
8

it's working with the classpath you said, thank's Bro – Ali Azimoshan Mar 11 '21 at 15:42

score 3 · Answer 3 · answered Mar 22 '21 at 09:19

3

If you have channel based code i.e bridge between Native Android and Flutter.. In MainActivity on Activity Result .. try adding ..

super.onActivityResult(requestCode, resultCode, data)

answered Mar 22 '21 at 09:19

ashutosh

103
9

Can you please elaborate or share a code snippet of usage. I am trying to pick image in flutter add-to-app approach. – bharats Mar 26 '22 at 12:28

score 3 · Answer 4 · answered Jun 21 '21 at 16:35

Anyway, I have the same issue when using Image Picker.

I have solved the trouble, it needs to provide permission to access the camera and storage memory on the release mode.

On Android: Add lines on file src/main/AndroidManifest.xml: inside the manifest tag

<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

On IOS: Add lines on file Info.plist:

<key>NSPhotoLibraryUsageDescription</key>
<string>Allow access to photo library</string>

<key>NSCameraUsageDescription</key>
<string>Allow access to camera to capture photos</string>

Good luck, hope it will be useful!

score 2 · Answer 5 · answered Apr 22 '20 at 11:39

2

I updated package from 0.5.4+3 to ^0.6.5+2 and that solved my problem.

If you read the changelog, you will see every issue fixes: https://pub.dev/packages/image_picker#-changelog-tab-

answered Apr 22 '20 at 11:39

Blasanka

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score 0 · Answer 6 · answered Oct 15 '19 at 07:24

0

Removing and Reinstalling application as stated in the comments is fix the problem.

answered Oct 15 '19 at 07:24

smrf

349
3
16

i tried it, but is not helping. it is not a good use case for customer, to be forced to reinstall the app. :( – maerlyn Jan 22 '21 at 12:57

score 0 · Answer 7 · answered Mar 15 '21 at 08:12

0

In my case, I haven't given access to "Files". While connecting USB, give access as shown :

answered Mar 15 '21 at 08:12

Dinesh Bala

947
7
8

score 0 · Answer 8 · edited Jul 17 '22 at 02:43

0

Please add this line in your MainActivity.kt class:

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent) {
    super.onActivityResult(requestCode, resultCode, data);

edited Jul 17 '22 at 02:43

Hamed

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answered Jul 13 '22 at 19:21

rajdeep shah

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score 0 · Answer 9 · answered Mar 08 '23 at 15:01

For the same error in my case, I added super onActivity result, maybe you are overriding any method on MainActivity with using super,

Ref answer here https://stackoverflow.com/a/65525354/15721679

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent) {
    super.onActivityResult(requestCode, resultCode, data); // add this line.

Flutter Image picker is already active, null exception

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