Flutter App won't build appbundle/APK or run on Android after android studio 3.5

Question

Basically my app run and build on iOS but doesn't on Android anymore after I updated Android studio to 3.5 version and i really need to be able to post a release on the playstore.

I've tried lots of things but nothing works i'm looking forward for someone to give me the solution to my problem ! I'm desperate !

Here is my flutter doctor -v log :

[✓] Flutter (Channel unknown, v1.9.1+hotfix.5, on Mac OS X 10.15 19A602, locale en-FR)
    • Flutter version 1.9.1+hotfix.5 at /Users/axel/flutter
    • Framework revision 1aedbb1835 (6 days ago), 2019-10-17 08:37:27 -0700
    • Engine revision b863200c37
    • Dart version 2.5.0


[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.1)
    • Android SDK at /Users/axel/Library/Android/sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-29, build-tools 29.0.1
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 11.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 11.1, Build version 11A1027
    • CocoaPods version 1.8.4

[✓] Android Studio (version 3.5)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin version 40.2.2
    • Dart plugin version 191.8593
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)

[✓] VS Code (version 1.39.2)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.5.1

[✓] Connected device (1 available)
    • Android SDK built for x86 • emulator-5554 • android-x86 • Android 10 (API 29) (emulator)

• No issues found!

Solution

you just have to modify the build.gradle in android>app>build.gradle with this :

buildTypes {
       release {
            signingConfig signingConfigs.release
       //minifyEnabled true
       //useProguard true
      //proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
       }
   }

then you can:

flutter clean
flutter build appbundle --release

Comments

[Axel Frau]

do you mean i should comment minify, useprogard and proguardfile ?

[Wambert Orion]

yes you have to comment on these lines and then execute the flutter clean and flutter build appbundle --release