`NullPointerException` in `UCropActivity` during `onCreateOptionsMenu()` causing crash in release mode

[mbfakourii]

Description

The app crashes with a NullPointerException in the UCropActivity during the onCreateOptionsMenu() method, but only in release mode. This issue does not occur in debug mode.

FATAL EXCEPTION: main
 Process: com.example.app, PID: 4046
   java.lang.NullPointerException: throw with null exception
    at m.i.inflate(SourceFile:25)
    at com.yalantis.ucrop.UCropActivity.onCreateOptionsMenu(SourceFile:7)
    at android.app.Activity.onCreatePanelMenu(Activity.java:4228)
    at e.n.onCreatePanelMenu(SourceFile:3)
    at j.y.onCreatePanelMenu(SourceFile:11)
    at e.j.run(SourceFile:925)
    at android.os.Handler.handleCallback(Handler.java:888)
    at android.os.Handler.dispatchMessage(Handler.java:100)
    at android.os.Looper.loop(Looper.java:213)
    at android.app.ActivityThread.main(ActivityThread.java:8178)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:513)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1101)

Additional Information settings.gradle:

id "com.android.application" version "8.2.1" apply false

gradle-wrapper.properties:

distributionUrl=https\://services.gradle.org/distributions/gradle-8.3-all.zip

Other:

Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, 3.27.1, on Microsoft Windows [Version 10.0.26100.2454], locale en-US)
[√] Windows Version (Installed version of Windows is version 10 or higher)
[√] Android toolchain - develop for Android devices (Android SDK version 35.0.0)
[√] Chrome - develop for the web
[√] Visual Studio - develop Windows apps (Visual Studio Community 2022 17.11.5)
[√] Android Studio (version 2024.2)
[√] Connected device (5 available)
[√] Network resources

[mbfakourii]

app/build.gradle:

buildTypes {
    release {
        minifyEnabled false
        shrinkResources false
        signingConfig signingConfigs.release
    }
}

I solved the problem with this code, but the program size increased by 7 MB!

[GuimG]

@mbfakourii works for me too. We had the same problem in production and I needed a quick fix, thanks.

[PisethChuon]

Add the UCropActivity to your Android projects AndroidManifest.xml file.

<activity     
            android:name="com.yalantis.ucrop.UCropActivity"
            android:theme="@style/Theme.AppCompat.NoActionBar" />

Open android/app/src/main/AndroidManifest.xml.

It works for me. This specifies the UCropActivity class that handles the image cropping.

[hnvn]

add following lines to your android/app/proguard-rules.pro:

-dontwarn com.yalantis.ucrop**
-keep class com.yalantis.ucrop** { *; }
-keep interface com.yalantis.ucrop** { *; }

Fyi why it happened? https://developer.android.com/build/shrink-code

[mbfakourii]

add following lines to your android/app/proguard-rules.pro:

-dontwarn com.yalantis.ucrop**
-keep class com.yalantis.ucrop** { *; }
-keep interface com.yalantis.ucrop** { *; }

Fyi why it happened? https://developer.android.com/build/shrink-code

I tested it and it didn't work.

[inpt333]

add following lines to your android/app/proguard-rules.pro:

-dontwarn com.yalantis.ucrop**
-keep class com.yalantis.ucrop** { *; }
-keep interface com.yalantis.ucrop** { *; }

Fyi why it happened? https://developer.android.com/build/shrink-code

@hnvn it seems that those are not enough, it didn't work for me either.

[vinay-elred]

Using this : Working for me now https://github.com/hnvn/flutter_image_cropper/issues/544#issuecomment-2558412236

@hnvn Can you please confirm by when can except this fix.

[0x3dev]

@vinay-elred just tried the proguard rules now, unfortunately it doesn't solve it

[MrLightful]

Still an issue.

[fullflash]

sad to see that still this issue has not been resolved only working with debug mode not release.

[nfriend]

Just ran into this in March of 2025 on version 9.0.0. The fix described above worked for me 👍

[rahdeva]

April 2025 and still an issue.

[rahdeva]

Changing the following line in gradle.properties works for me:

android.enableR8.fullMode=false

This is better than disabling minification and resource shrinking completely, so I still keep these set to true:

minifyEnabled true
shrinkResources true

But please fix this issue @hnvn

[DmitryKamynin]

This may sound crazy, but I accidentally discovered a strange pattern.

After 8 hours of work, I opened pubspec.yaml to remove unnecessary dependencies, and the app stopped opening in production.

I soon discovered that if I remove the emoji_picker_flutter dependency, but leave flutter_image_cropper alone, I magically get the same error on startup as the issue author

Maybe the problem is something completely different, and this won't work for others

I will certainly try to find another way to solve this problem, because leaving it like this is shooting myself in the foot in the future

[json-kim]

Adding the following to the proguard-rules.pro file solved my issue

-dontwarn org.xmlpull.v1.**
-keep class org.xmlpull.v1.** { *; }

[yizaho]

Changing the following line in gradle.properties works for me:

android.enableR8.fullMode=false This is better than disabling minification and resource shrinking completely, so I still keep these set to true:

Used above as a temporary solution. @hnvn Any outlook on a fix?

[lincolnmedicinadireta]

The same problem

[inkyu0103]

Adding the following to the proguard-rules.pro file solved my issue

-dontwarn org.xmlpull.v1.**
-keep class org.xmlpull.v1.** { *; }

It works for me!

Android 15 ( SDK 35 )