API (unsupported) warning in Google play store pre-launch reports

[arunkumarpandian]

Describe the bug
I see the following API compatibility warning reported from Google play store pre-launch reports. I didn't see any issues when building and testing a release build of my app with the plugin on the emulator as well as physical devices though.

StrictMode policy violation: android.os.strictmode.NonSdkApiUsedViolation: Lsun/misc/Unsafe;->theUnsafe:Lsun/misc/Unsafe; at android.os.StrictMode.lambda$static$1(StrictMode.java:428) at android.os.-$$Lambda$StrictMode$lu9ekkHJ2HMz0jd3F8K8MnhenxQ.accept(Unknown Source:2) at java.lang.Class.getDeclaredField(Native Method) at com.google.gson.internal.l.a(Unknown Source:13) at com.google.gson.internal.c$e.<init>(Unknown Source:7) at com.google.gson.internal.c.b(Unknown Source:2) at com.google.gson.internal.c.a(Unknown Source:54) at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(Unknown Source:16) at com.google.gson.Gson.a(Unknown Source:35) at com.dexterous.flutterlocalnotifications.RuntimeTypeAdapterFactory.create(Unknown Source:52) at com.google.gson.Gson.a(Unknown Source:74) at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.a(Unknown Source:41) at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.a(Unknown Source:123) at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(Unknown Source:22) at com.google.gson.Gson.a(Unknown Source:74) at com.google.gson.Gson.a(Unknown Source:4) at com.google.gson.Gson.a(Unknown Source:8) at com.google.gson.Gson.a(Unknown Source:5) at com.google.gson.Gson.a(Unknown Source:13) at com.dexterous.flutterlocalnotifications.FlutterLocalNotificationsPlugin.zonedScheduleNotification(Unknown Source:4) at com.dexterous.flutterlocalnotifications.FlutterLocalNotificationsPlugin.zonedSchedule(Unknown Source:29) at com.dexterous.flutterlocalnotifications.FlutterLocalNotificationsPlugin.onMethodCall(Unknown Source:229) at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(Unknown Source:17) at io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(Unknown Source:57) at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(Unknown Source:4) at android.os.MessageQueue.nativePollOnce(Native Method) at android.os.MessageQueue.next(MessageQueue.java:326) at android.os.Looper.loop(Looper.java:160) at android.app.ActivityThread.main(ActivityThread.java:6718) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)

My setup

$ flutter doctor -v
[✓] Flutter (Channel beta, 1.24.0-10.2.pre, on Linux, locale en_GB.UTF-8)
• Flutter version 1.24.0-10.2.pre at /home/xxxx/tools/flutter/flutter
• Framework revision 022b333a08 (4 weeks ago), 2020-11-18 11:35:09 -0800
• Engine revision 07c1eed46b
• Dart version 2.12.0 (build 2.12.0-29.10.beta)

[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
• Android SDK at /home/xxxx/Android/Sdk
• Platform android-30, build-tools 30.0.3
• ANDROID_HOME = /home/xxxx/Android/Sdk
• ANDROID_SDK_ROOT = /home/xxxx/Android/Sdk
• Java binary at: /usr/bin/java
• Java version OpenJDK Runtime Environment (build 11.0.9.1+1-Ubuntu-0ubuntu1.20.04)
• All Android licenses accepted.

$ cat pubspec.yaml | grep local
flutter_local_notifications: ^3.0.1+6

proguard-rules.pro

• Have added all the content from the example

app/build.gradle

`android {
compileSdkVersion 29

sourceSets {
    main.java.srcDirs += 'src/main/kotlin'
}

lintOptions {
    disable 'InvalidPackage'
}

defaultConfig {
    applicationId "com.xxx.yyy"
    minSdkVersion 23
    targetSdkVersion 29
    versionCode flutterVersionCode.toInteger()
    versionName flutterVersionName
}

// NOTE ref: https://flutter.dev/docs/deployment/android
signingConfigs {
    release {
        keyAlias keystoreProperties['keyAlias']
        keyPassword keystoreProperties['keyPassword']
        storeFile keystoreProperties['storeFile'] ? file(keystoreProperties['storeFile']) : null
        storePassword keystoreProperties['storePassword']
    }
}

buildTypes {
    release {
        // NOTE ref: https://flutter.dev/docs/deployment/android
        signingConfig signingConfigs.release
    }
}

}`

Apologies if the following is being caused by an incorrect setup at my end !

[MaikuB]

This is likely the same issue that was reported in #623. It's an issue with an Android library being used and from what I've read shouldn't cause an issue and given it's from another dependency, not something I can address.

[arunkumarpandian]

@MaikuB Thanks for clarifying ! Shall close this issue then as it is caused by the other dependency.