安装Firebase后Flutter不能在Android上运行

Question

如果我把firebase_core添加到flutter项目中，它就不能在Android上运行。在iOS中这是可以的。

我有个分级错误。

    Launching lib/main.dart on Android SDK built for x86 in debug mode...
    Initializing gradle...
    Resolving dependencies...
    Running Gradle task 'assembleDebug'...
    registerResGeneratingTask is deprecated, use registerGeneratedResFolders(FileCollection)
    registerResGeneratingTask is deprecated, use registerGeneratedResFolders(FileCollection)
    registerResGeneratingTask is deprecated, use registerGeneratedResFolders(FileCollection)
    registerResGeneratingTask is deprecated, use registerGeneratedResFolders(FileCollection)
    registerResGeneratingTask is deprecated, use registerGeneratedResFolders(FileCollection)

    FAILURE: Build failed with an exception.

    * What went wrong:

        Could not determine the dependencies of task ':firebase_core:compileDebugAidl'.
        > Could not resolve all task dependencies for configuration ':firebase_core:debugCompileClasspath'.
           > Could not find com.google.firebase:firebase-core:.
             Required by:
                 project :firebase_core

• pubspec:

    dependencies:
      date_format: ^1.0.6
      flutter:
        sdk: flutter

      url_launcher: ^5.0.2
      webview_flutter: ^0.3.5+3
        #path: ./../webview_flutter
      shared_preferences: ^0.5.1+2
      local_auth: ^0.4.0+1
      http: ^0.12.0+1
      xml: ^3.3.1
      #flutter_auth_buttons: ^0.3.1
      flutter_masked_text: ^0.8.0
      path_provider: ^0.5.0+1
      base32: ^1.0.1
      #json_serializable: ^2.0.3
      get_it: ^1.0.3
      rxdart: ^0.21.0
      flutter_html: ^0.9.6
      sqflite: ^1.1.3
      archive: ^2.0.8
      percent_indicator: ^1.0.14
      flutter_statusbarcolor: ^0.2.0
      flutter_inappbrowser: ^1.1.1
      scoped_model: ^1.0.1

      #Firebase
      firebase_core: ^0.3.1+1
      firebase_analytics: ^2.1.1

null

    buildscript {
        ext.kotlin_version = '1.2.71'
        repositories {
            google()
            jcenter()
        }

        dependencies {

            classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"

            classpath 'com.google.gms:google-services:3.2.1'

            classpath 'com.android.tools.build:gradle:3.2.1'
        }
    }

    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
    }

    subprojects {
        project.configurations.all {
            resolutionStrategy.eachDependency { details ->
                if (details.requested.group == 'androidx.fragment' &&
                        !details.requested.name.contains('androidx')) {
                    details.useVersion "1.0.0"
                }
            }
        }
    }

• 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.") }
> 
> def flutterVersionCode =
> localProperties.getProperty('flutter.versionCode') if
> (flutterVersionCode == null) {
>     flutterVersionCode = '1' }
> 
> def flutterVersionName =
> localProperties.getProperty('flutter.versionName') if
> (flutterVersionName == null) {
>     flutterVersionName = '1.0' }
> 
> apply plugin: 'com.android.application' apply plugin: 'kotlin-android'
> apply from:
> "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
> 
> android {
>     compileSdkVersion 28
> 
>     sourceSets {
>         main.java.srcDirs += 'src/main/kotlin'
>     }
> 
>     lintOptions {
>         disable 'InvalidPackage'
>     }
> 
>     defaultConfig {
>         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
>         applicationId "xxx"
>         minSdkVersion 21
>         targetSdkVersion 28
>         versionCode flutterVersionCode.toInteger()
>         versionName flutterVersionName
>         //testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
>     }
> 
>     buildTypes {
>         release {
>             // TODO: Add your own signing config for the release build.
>             // Signing with the debug keys for now, so `flutter run --release` works.
>             signingConfig signingConfigs.debug
>         }
>     } }
> 
> flutter {
>     source '../..' }
> 
> dependencies {
>     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
>     testImplementation 'junit:junit:4.12'
>     //androidTestImplementation 'com.android.support.test:runner:1.0.2'
>     //androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
> 
>     implementation 'com.google.firebase:firebase-core:16.0.8' }
> 
> apply plugin: 'com.google.gms.google-services'

那么我能做些什么来解决这个问题呢？正如我所说的，它可以在iOS上工作，并且我可以在Firebase控制台中看到Analytics仪表板。

详细信息...如果我打开Android Studio中的Android模块，它会返回这个gradle错误：

Answer 1

我有其他的项目与Firebase很好的工作，所以我开始比较所有的版本...几个小时后，我发现问题出在Firebase-Core0.3.2依赖项的“Firebase-BOM”上。

这就是我为解决问题所做的工作的履历：

1）正在工作的项目使用:firebase_core:0.3.1，而我的项目使用的是firebase_core:0.3.2.2)我尝试使用这个版本0.3.1，但我不知道为什么，在Android Studio中我可以看到来自0.3.2的build.gradle被缓存了。

我意识到了这一点，因为在android Studio上打开android文件夹后，就可以看到所有的依赖项，就像这张图一样。这个文件的内容不同于我的另一个工作良好的项目。

所以我右键单击这个build.gradle文件并在Finder中打开：

令我惊讶的是，它在firebase-core插件的0.3.2位置打开，而我使用的是0.3.1版本。

所以我做了件疯狂的事。

我替换了此文件中的所有内容：

/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core-0.3.2/android/build.gradle

我从这里复制了所有的东西：

/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core-0.3.1+1/android/build.gradle

不同的是这一行：

似乎有了这个“Firebase-BOM”依赖关系，我的项目就会中断。

在此之后，我的项目在android和Firebase上执行得很好...我用Firebase Remote Config做了一些测试，一切正常。

我真的很感激如果有人能解释我为什么会发生这种事和一个更好的方法来解决这件事。