错误：迁移到 AndroidX 后找不到符号导入 com.google.firebase.iid.InstanceIdResult

Question

我有一个 Flutter 应用程序运行良好，然后我想我会将我所有的插件升级到 androidX，并且在我决定添加 firebase_messaging 之前一切正常，我已经尝试了 4,5 版，没有一个工作，继续抛出那个错误，好像我在错误的版本上。我也试过flutter packages pub cache repair 不走运。 github上有很多相关的问题，但是他们都被关闭了，人们仍然抱怨修复不起作用。 这是我的 gradle 看起来像

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.")
}

def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
    flutterVersionCode = '3'
}

def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
    flutterVersionName = '1.0.1'
}

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
apply plugin: 'com.google.gms.google-services'

def keystoreProperties = new Properties()
def keystorePropertiesFile = rootProject.file('key.properties')
if (keystorePropertiesFile.exists()) {
    keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
}


android {
    compileSdkVersion 28

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

    lintOptions {
        disable 'InvalidPackage'
    }

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.sggo.uni"
        minSdkVersion 21
        targetSdkVersion 28
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
        // ndk {
        //     abiFilters 'x86', 'armeabi-v7a'
        // }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
    signingConfigs {
        release {
            keyAlias keystoreProperties['keyAlias']
            keyPassword keystoreProperties['keyPassword']
            storeFile file(keystoreProperties['storeFile'])
            storePassword keystoreProperties['storePassword']
        }
    }
    buildTypes {
        release {
            signingConfig signingConfigs.release
        }
    }
}

flutter {
    source '../..'
}

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test:runner:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
}

buildscript {
    ext.kotlin_version = '1.3.31'
    repositories {
        google()
        jcenter()


    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.4.0'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'com.google.gms:google-services:4.0.2'
    }
}

allprojects {
    configurations.all {
        resolutionStrategy.eachDependency { DependencyResolveDetails details ->
            def requested = details.requested
            if (requested.group == 'com.google.firebase') {
                details.useVersion "15.+"
            }
            
        }
    }
    repositories {
        google()
        jcenter()

    }
}

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

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

导入 com.google.firebase.iid.InstanceIdResult; ^ 符号：类 InstanceIdResult 位置：包 com.google.firebase.iid /Users/test/Desktop/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_messaging-5.0.0/android/src/main/java/io/flutter/plugins/firebasemessaging/FirebaseMessagingPlugin.java:106：错误：找不到符号 新的 OnCompleteListener() { ^ 符号：类 InstanceIdResult 位置：类 FirebaseMessagingPlugin /Users/test/Desktop/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_messaging-5.0.0/android/src/main/java/io/flutter/plugins/firebasemessaging/FirebaseMessagingPlugin.java:108：错误：找不到符号 public void onComplete(@NonNull Task task) { ^ 符号：类 InstanceIdResult /Users/test/Desktop/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_messaging-5.0.0/android/src/main/java/io/flutter/plugins/firebasemessaging/FirebaseMessagingPlugin.java:104：错误：找不到符号 .getInstanceId() ^ 符号：方法 getInstanceId() 位置：类 FirebaseInstanceId /Users/test/Desktop/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_messaging-5.0.0/android/src/main/java/io/flutter/plugins/firebasemessaging/FirebaseMessagingPlugin.java:133：错误：找不到符号 新的 OnCompleteListener() { ^ 符号：类 InstanceIdResult 位置：类 FirebaseMessagingPlugin /Users/test/Desktop/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_messaging-5.0.0/android/src/main/java/io/flutter/plugins/firebasemessaging/FirebaseMessagingPlugin.java:135：错误：找不到符号 public void onComplete(@NonNull Task task) { ^ 符号：类 InstanceIdResult /Users/test/Desktop/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_messaging-5.0.0/android/src/main/java/io/flutter/plugins/firebasemessaging/FirebaseMessagingPlugin.java:131：错误：找不到符号 .getInstanceId() ^ 符号：方法 getInstanceId() 位置：类 FirebaseInstanceId /Users/test/Desktop/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_messaging-5.0.0/android/src/main/java/io/flutter/plugins/firebasemessaging/FlutterFirebaseMessagingService.java:39：错误：方法没有覆盖或实现超类型中的方法 @Override

Answer 1

是的，因为 com.google.firebase.iid.InstanceIdResult 已弃用且不再可用。 因此，为了从 firebase 获取令牌，您现在必须使用。

FirebaseMessaging.getInstance().getToken()
.addOnCompleteListener(new OnCompleteListener<String>() {
    @Override
    public void onComplete(@NonNull Task<String> task) {
      if (!task.isSuccessful()) {
        Log.w(TAG, "Fetching FCM registration token failed", task.getException());
        return;
      }

      // Get new FCM registration token
      String token = task.getResult();

      // Log and toast
      String msg = getString(R.string.msg_token_fmt, token);
      Log.d(TAG, msg);
      Toast.makeText(MainActivity.this, msg, Toast.LENGTH_SHORT).show();
    }
});

Answer 2

以下更改解决了我的问题

来自：

ext {
 firebaseMessagingVersion = "+" // default: "+"
}

到：

ext {
 firebaseMessagingVersion = "21.1.0"
}

Answer 3

我能够通过使用这个exactbuild gradle 和google-services 版本号组合来解决这个问题，希望它对你有所帮助

buildscript {
    ext.kotlin_version = '1.3.31'
    repositories {
        google()
        jcenter()


    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.3.0'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'com.google.gms:google-services:4.2.0'
    }
}

allprojects {
    repositories {
        google()
        jcenter()

    }
}