Question

我正在尝试通过firebase_messaging实现推送通知：^ 6.0.13，
Flutter：firebase_messaging的构建错误”

我已经研究过所有类似的情况，将项目迁移到AndroidX，但仍然无法解决Android构建错误：

遵循的程序。

扑打干净
flutter软件包发布缓存修复
重新启动Android
重新制作模拟器无效
将项目迁移到AndroidX
尝试降级插件版本

例外：

Using hardware rendering with device Android SDK built for x86. If you get graphics artifacts, consider enabling software rendering with "--enable-software-rendering".
Launching lib/main.dart on Android SDK built for x86 in debug mode...
Initializing gradle...                                              0.6s
Resolving dependencies...                                           2.5s
/home/rajeshpatil/Downloads/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_messaging-6.0.13/android/src/main/java/io/flutter/plugins/firebasemessaging/FirebaseMessagingPlugin.java:80: error: cannot find symbol
    onAttachedToEngine(binding.getApplicationContext(), binding.getBinaryMessenger());
                                                               ^        
  symbol:   method getBinaryMessenger()                                 
  location: variable binding of type FlutterPluginBinding               
1 error                                                                 

FAILURE: Build failed with an exception.                                

* What went wrong:                                                      
Execution failed for task ':firebase_messaging:compileDebugJavaWithJavac'.
> Compilation failed; see the compiler error output for details.        

* Try:                                                                  
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org                              

BUILD FAILED in 2s                                                      
Running Gradle task 'assembleDebug'...                                  
Running Gradle task 'assembleDebug'... Done                         3.3s
Gradle task assembleDebug failed with exit code 1

项目级别/build.gradle：

    repositories {
        google()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.5.3'
        classpath 'com.google.gms:google-services:4.3.3'
    }
}

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
}

应用程序级别/build.gradle：

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"

android {
    compileSdkVersion 28

    lintOptions {
        disable 'InvalidPackage'
    }

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.example.helloworld"
        minSdkVersion 16
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
        multiDexEnabled true
    }

    buildTypes {
        release {
            // TODO: Add your own signing config for the release build.
            // Signing with the debug keys for now, so `flutter run --release` works.
            signingConfig signingConfigs.debug
        }
    }
}

flutter {
    source '../..'
}

dependencies {
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0'
    implementation 'com.google.firebase:firebase-analytics:17.2.2'
}

apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.google-services'

gradle.properties：

android.enableR8=true
android.useAndroidX=true
android.enableJetifier=true

Flutter Doctor：

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel beta, v1.10.7, on Linux, locale en_IN)

[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
[✓] Android Studio (version 3.5)
[✓] VS Code (version 1.43.0)
[✓] Connected device (1 available)

• No issues found!

Answer 1

您似乎正在处理一个较旧的flutter项目，请尝试一些尝试，看看是否有帮助。

1）更新您的flutter SDK。您当前使用的是Flutter的较旧版本，以及从未稳定发行的beta版本。即使这不能解决您的问题，升级也是明智的。您可以通过在终端中运行flutter upgrade来实现。

2）您可能正在尝试使用某些Firebase软件包的旧版本，包括消息传递。尝试更改classpath 'com.google.gms:google-services:4.3.0' 在您的项目gradle.build到classpath 'com.google.gms:google-services:3.2.1'中。仅当更新flutter SDK不能解决问题，并且无法解决问题时，才执行此操作。

3）过去，当我遇到类似问题时，尝试在app-level / build.gradle中增加该项目的minSDKVersion，这解决了sdk 21版的问题。

颤动firebase_messaging：^ 6.0.13失败，异常：

1 个答案: