Flutter app crashing on android 10 & R with No static method isAtLeastR

问题

I've seen a few issues similar on Stack overflow, but not one that quite relates to the same libraries.

I'm trying to use 2 plugins in flutter flutter_geofence and geolocator

They've both been working fine, but since yesterday as soon as of the location play services are called I'm getting the app quit with a stack trace similar to below:

E/flutter (11478): [ERROR:flutter/shell/platform/android/platform_view_android_jni.cc(39)] java.lang.NoSuchMethodError: No static method isAtLeastR()Z in class Landroidx/core/os/BuildCompat; or its super classes (declaration of 'androidx.core.os.BuildCompat' appears in /data/app/com.mypossibleself.app-FTu9V5QDAKR_ngQmuPzg7Q==/base.apk!classes2.dex)
E/flutter (11478):  at com.google.android.gms.common.util.PlatformVersion.isAtLeastR(com.google.android.gms:play-services-basement@@17.2.1:21)
E/flutter (11478):  at com.google.android.gms.common.api.GoogleApi.zaa(com.google.android.gms:play-services-base@@17.2.1:128)
E/flutter (11478):  at com.google.android.gms.common.api.GoogleApi.<init>(com.google.android.gms:play-services-base@@17.2.1:41)
E/flutter (11478):  at com.google.android.gms.common.api.GoogleApi.<init>(com.google.android.gms:play-services-base@@17.2.1:56)
E/flutter (11478):  at com.google.android.gms.location.FusedLocationProviderClient.<init>(Unknown Source:8)
E/flutter (11478):  at com.google.android.gms.location.LocationServices.getFusedLocationProviderClient(Unknown Source:2)
E/flutter (11478):  at com.baseflow.geolocator.tasks.LocationUpdatesUsingLocationServicesTask.<init>(LocationUpdatesUsingLocationServicesTask.java:29)
E/flutter (11478):  at com.baseflow.geolocator.tasks.TaskFactory.createStreamLocationUpdatesTask(TaskFactory.java:120)
E/flutter (11478):  at com.baseflow.geolocator.GeolocatorPlugin.onListen(GeolocatorPlugin.java:110)
E/flutter (11478):  at io.flutter.plugin.common.EventChannel$IncomingStreamRequestHandler.onListen(EventChannel.java:193)
E/flutter (11478):  at io.flutter.plugin.common.EventChannel$IncomingStreamRequestHandler.onMessage(EventChannel.java:172)
E/flutter (11478):  at io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(DartMessenger.java:93)
E/flutter (11478):  at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:642)
E/flutter (11478):  at android.os.MessageQueue.nativePollOnce(Native Method)
E/flutter (11478):  at android.os.MessageQueue.next(MessageQueue.java:336)
E/flutter (11478):  at android.os.Looper.loop(Looper.java:174)
E/flutter (11478):  at android.app.ActivityThread.main(ActivityThread.java:7356)
E/flutter (11478):  at java.lang.reflect.Method.invoke(Native Method)
E/flutter (11478):  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
E/flutter (11478):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)

So it's complaining about a missing method isAtLeastR

Other references I've seen to this mention specific versions of com.google.android.gms:play-services-base causing this, but that it's fixed in com.google.android.gms:play-services-base:17.2.1

Neither of these library implement that package in their build.gradle files so I'm at a loss as to what needs doing to fix this issue.

回答1:

In the app/build.gradle add com.google.android.gms:play-services-base:17.2.1 this should make libraries use specific version of play-services.

If it doesn't help, might need to

configurations.all {
    resolutionStrategy {
        force 'com.google.needed_dependency'
    }
}

https://flutter.dev/docs/development/packages-and-plugins/using-packages#conflict-resolution

Edit as per Andrews suggestion:

17.2.1 doesn't work, but 17.0.0 does.

implementation("com.google.android.gms:play-services-base:17.0.0"){ force = true } 

回答2:

resolutionStrategy {
            force 'com.google.android.gms:play-services-base:17.1.0' 
        }           
}

This is what solved it for me.

来源：https://stackoverflow.com/questions/60992456/flutter-app-crashing-on-android-10-r-with-no-static-method-isatleastr