Cannot access 'android.arch.lifecycle.LifecycleOwner' which is a supertype of 'com.ex.app.MainActivity'. Check your module classpath for missing or conflicting dependencies

@Adgeros commented on Mar 6, 2020, 5:20 AM UTC:

This issue was moved by xster from flutter/flutter#52077.

@TahaTesser commented on Mar 6, 2020, 8:23 AM UTC:

Hi @Adgeros
can you please provide your flutter doctor -v and flutter run --verbose?
Also, to better address the issue, would be helpful if you could post a minimal code sample to reproduce the problem
Thank you

@Adgeros commented on Mar 6, 2020, 8:43 AM UTC:

I opened up the android project, the compile succeeded, but the ide reported an error

flutter doctor -v

[√] Flutter (Channel stable, v1.12.13+hotfix.8, on Microsoft Windows [Version 10.0.18363.657], locale zh-CN)
    • Flutter version 1.12.13+hotfix.8 at D:\Flutter\flutter
    • Framework revision 0b8abb4724 (3 weeks ago), 2020-02-11 11:44:36 -0800
    • Engine revision e1e6ced81d
    • Dart version 2.7.0

[√] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
    • Android SDK at D:\Android\sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-R, build-tools 29.0.3
    • ANDROID_HOME = D:\Android\sdk
    • Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b04)
    • All Android licenses accepted.

[√] Android Studio (version 3.6)
    • Android Studio at C:\Program Files\Android\Android Studio
    • Flutter plugin version 44.0.2
    • Dart plugin version 192.7761
    • Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b04)

[!] Connected device
    • Device 75ABBKM22SWH is not authorized.
      You might need to check your device for an authorization dialog.

! Doctor found issues in 1 category.

flutter run --verbose compile succeeded

@TahaTesser commented on Mar 6, 2020, 12:38 PM UTC:

Hi @Adgeros
Have you modified your build.gradle in anyway?
Can you post your build.gradle?
Thank you

@glitchedmob commented on Mar 6, 2020, 8:32 PM UTC:

I think this issue might have something to do with a recent version of the Kotlin plugin for Android Studio. I had run into the error shortly after installing a recent update of that plugin. I created a brand new flutter project to make sure it wasn't just something weird with the project I was working on and I was still seeing this error there. After removing the plugin update I had installed the error disappeared.

I could be wrong but it appears to be what was causing issues for me.

@KohlsAdrian commented on Mar 6, 2020, 11:44 PM UTC:

I think it is related to the new 1.3.70 kotlin version

downgrading may fix the issue

@Skyost commented on Mar 10, 2020, 10:08 PM UTC:

Got the same error with 1.3.50 kotlin version. I have the same flutter doctor -v result than @Adgeros.

@KohlsAdrian commented on Mar 10, 2020, 10:12 PM UTC:

try 1.3.61

@Skyost commented on Mar 10, 2020, 10:29 PM UTC:

Thanks for your help @KohlsAdrian but it's still not working.

EDIT :

Gradle version : 5.6.4

flutter doctor -v :

[√] Flutter (Channel stable, v1.12.13+hotfix.8, on Microsoft Windows [version 10.0.17763.1039], locale fr-FR)
    • Flutter version 1.12.13+hotfix.8 at D:\Hugo\Programmes\Flutter
    • Framework revision 0b8abb4724 (4 weeks ago), 2020-02-11 11:44:36 -0800
    • Engine revision e1e6ced81d
    • Dart version 2.7.0

[√] Android toolchain - develop for Android devices (Android SDK version 30.0.0-rc1)
    • Android SDK at D:\Hugo\Programmes\Android\SDK
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-29, build-tools 30.0.0-rc1
    • ANDROID_HOME = D:\Hugo\Programmes\Android\SDK
    • Java binary at: D:\Hugo\Programmes\Android\Studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b04)
    • All Android licenses accepted.

[√] Android Studio (version 3.6)
    • Android Studio at D:\Hugo\Programmes\Android\Studio
    • Flutter plugin version 44.0.2
    • Dart plugin version 192.7761
    • Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b04)

[√] Connected device (1 available)
    • AOSP on IA Emulator • emulator-5554 • android-x86 • Android 9 (API 28) (emulator)

• No issues found!

build.gradle :

buildscript {
    ext.kotlin_version = '1.3.70'
    ext {
        compileSdkVersion = 29
        targetSdkVersion = 29
        appCompatVersion = "1.0.2"
    }

    repositories {
        google()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.6.1'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
    project.evaluationDependsOn(':app')
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

@mweiczorek commented on Mar 11, 2020, 8:29 AM UTC:

Same issue here. I work on the Flutter project with VS Code, but I needed to open it in Android Studio to add a library to the native side of the project, and I get this same error with Kotlin 1.3.50. The fact that we're all getting the same errors with different versions of Kotlin would suggest the problem does not lie with Kotlin.

@mweiczorek commented on Mar 11, 2020, 9:17 AM UTC:

Update. The FlutterActivity implements android.arch.lifecycle.LifecycleOwner, but the android.archpackage is missing from my SDK.

Another issue is that the app/build.gradle file specifies API version 28, but the libraries show 29

android {
    compileSdkVersion 28
    ....
    defaultConfig {
        ....
        minSdkVersion 16
        targetSdkVersion 28
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }
}

I haven't changed anything in either gradle file. All SDK's listed int eh SDK manager are labeled as 'Installed'.

This project was created in the terminal with flutter create. This works perfectly using the emulator via the VS Code debugger, even with the missing package.

I created a new Flutter project using Adroid Studio with the exact same result.

I've looked at this link regarding adding this dependency manually (even though I am not using androidx artifacts, the method should be the same), but any change I make to the gradle file does not result in anything being downloaded and installed. In the past, when I build a native Android app with Java, any edits made to the gradle would immediately trigger the update (as indicated by a progress indicator at the right of the application's status bar). With this, nothing happens.

I should also note that I have no gradle functionality, and I have no way to open the "Project Settings" dialog.

@Adgeros commented on Mar 12, 2020, 1:19 AM UTC:

I uninstalled the kotlin plugin to solve this problem

@jeromoney commented on Mar 12, 2020, 4:18 PM UTC:

I fixed this issue by downgrading my Kotlin plugin from 1.3.70-release-Studio3.6-1 to 1.3.61-release-Studio3.6-1 Even with the bug, Kotlin would compile just fine (flutter run), just wouldn't have access to the nice IDE features.

@blasten commented on Mar 12, 2020, 8:43 PM UTC:

Did you follow the steps outlined on https://flutter.dev/docs/development/androidx-migration? That error message indicates you haven’t migrated to AndroidX

@Skyost commented on Mar 12, 2020, 9:39 PM UTC:

Yep. In fact, my project has been created using flutter 1.12.