Firebase 消息传递错误（仅限 Android） - 新推送通知的致命异常

Question

We are currently using flutter to develop an app that receives push notifications. Everything worked fine until we did the last Flutter update and now we get a Fatal Exception inside Firebase - FlutterFirebaseMessagingService on Android only.

I couldn't find anything about this on the flutter git so it might be an android problem.

This happens the moment when the app gets a new Notification using Firebase functions and Firebase Messaging. Sample Data we use:

{
  notification: {
        title: „hello",
        body: „You got a new Message"
    },
    data: {
        click_action: "FLUTTER_NOTIFICATION_CLICK",
        additional: additional, // some integer values
        message: messageText // Same as message body above
    },
    apns: {
        payload: {
            aps: {
                badge: count,
            },
        },
    },
    token: deviceToken //this is a correct device id
}


admin.messaging().send(message)

Full Device Log

E/AndroidRuntime( 3436): FATAL EXCEPTION: Firebase-FlutterFirebaseMessagingService E/AndroidRuntime( 3436): Process: de.mandarinmedien.jutta, PID: 3436 E/AndroidRuntime( 3436): java.lang.NoSuchMethodError: No static method zzc(Landroid/content/Context;)Lcom/google/firebase/iid/zzz; in class Lcom/google/firebase/iid/zzz; or its super classes (declaration of 'com.google.firebase.iid.zzz' appears in /data/app/de.mandarinmedien.jutta-gn2RX8mWXXycpVEEEZIaNQ==/base.apk:classes3.dex) E/AndroidRuntime( 3436): at com.google.firebase.messaging.FirebaseMessagingService.zzd(Unknown Source:110) E/AndroidRuntime( 3436): at com.google.firebase.iid.zzg.run(Unknown Source:4) E/AndroidRuntime( 3436): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162) E/AndroidRuntime( 3436): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636) E/AndroidRuntime( 3436): at com.google.android.gms.common.util.concurrent.zza.run(Unknown Source:6) E/AndroidRuntime( 3436): at java.lang.Thread.run(Thread.java:764)

Does anyone already have experience with this error or has an idea how to solve it ?

Edit: android/app/build.gradle:

def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
    localPropertiesFile.withReader('UTF-8') { reader ->
        localProperties.load(reader)
    }
}

def flutterRoot = localProperties.getProperty('flutter.sdk')
if (flutterRoot == null) {
    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
}

apply plugin: 'com.android.application'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"

def keystorePropertiesFile = rootProject.file("key.properties")
def keystoreProperties = new Properties()
keystoreProperties.load(new FileInputStream(keystorePropertiesFile))

android {
    compileSdkVersion 27

    lintOptions {
        disable 'InvalidPackage'
    }

    defaultConfig {
        applicationId ******
        minSdkVersion 16
        targetSdkVersion 27
        versionCode 1
        versionName "0.1"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        multiDexEnabled true
    }

    signingConfigs {
        release {
            keyAlias keystoreProperties['keyAlias']
            keyPassword keystoreProperties['keyPassword']
            storeFile file(keystoreProperties['storeFile'])
            storePassword keystoreProperties['storePassword']
        }
    }
    buildTypes {
        release {
            signingConfig signingConfigs.debug
            minifyEnabled true
            useProguard true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

        }
    }
}

flutter {
    source '../..'
}

dependencies {
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
    implementation 'com.google.firebase:firebase-perf:16.0.0'
}

apply plugin: 'com.google.gms.google-services'
apply plugin: 'com.google.firebase.firebase-perf'

android/build.gradle

buildscript {
    repositories {
        google()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'
        classpath 'com.google.gms:google-services:3.2.1'
        classpath 'com.google.firebase:firebase-plugins:1.1.5'
    }
}

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

rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
    project.evaluationDependsOn(':app')
    project.configurations.all {
        resolutionStrategy.eachDependency { details ->
            if (details.requested.group == 'com.android.support'
                    && !details.requested.name.contains('multidex')) {
                details.useVersion "27.1.1"
            }
        }
    }

}

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

Answer 1

the error message hints for iid ; the instance ID service. this might be provided by firebase-core ; while it could also be incompatible versions, which occassionaly lead to unknown methods and fields.

try to update:

classpath 'com.android.tools.build:gradle:3.0.1'
classpath 'com.google.gms:google-services:3.2.1'

to the current versions:

classpath 'com.android.tools.build:gradle:3.2.0'
classpath 'com.google.gms:google-services:4.1.0'

the firebase-perf plugin has to be at the top, not the bottom:

apply plugin: 'com.android.application'
apply plugin: 'com.google.firebase.firebase-perf'

also the library is outdated (possibly might require firebase-core ):

implementation 'com.google.firebase:firebase-core:16.0.4'
implementation 'com.google.firebase:firebase-perf:16.1.2'

while I really wonder, why there is no dependency for FCM (as one would expect it):

implementation 'com.google.firebase:firebase-messaging:17.3.3'

once targeting API level 28, it is also suggested to setup a notification channel:

<meta-data
    android:name="com.google.firebase.messaging.default_notification_channel_id"
    android:value="@string/default_notification_channel_id" />

... the support libraries would be at version 28.0.0 currently.

remark: the invalid JSON syntax might (most likely) come from posting it wrongfully - otherwise other platforms would not function either; I've just added an explanation what is wrong with it and removed the hard-coded values. the stack-trace tells a whole other story, not hinting for any invalid syntax.