运行返回异常：评估项目'：app'时出现问题。“”> ASCII“

Question

我正在尝试遵循“将Firebase添加到Flutter中”教程（https://firebase.google.com/docs/flutter/setup）。我已经在许多以前的版本中做到了这一点。

现在在Flutter 1.9上，我收到“评估项目'：app'时发生问题。” “> ASCII”。这是一个已知问题吗？

扑打医生：

PS C:\DEV\auth> flutter doctor -v

[√] Android Studio (version 3.2)
    • Android Studio at C:\Program Files\Android\Android Studio
    • Flutter plugin version 31.3.1
    • Dart plugin version 181.5656
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)

[√] VS Code, 64-bit edition (version 1.39.1)
    • VS Code at C:\Program Files\Microsoft VS Code
    • Flutter extension version 3.5.1

[√] Connected device (1 available)
    • Android SDK built for x86 • emulator-5554 • android-x86 • Android 9 (API 28) (emulator)

• No issues found!

build.gradle

buildscript {
    repositories {
        google()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.1'
        classpath 'com.google.gms:google-services:4.3.2'  // Google Services plugin
    }
}

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
}

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 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.auth"
        minSdkVersion 16
        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 {
    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'
}

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

Answer 1

将您的 android/build.gradle 类路径版本更改为 3.5.0。

类路径'com.android.tools.build:gradle:3.5.0'

然后在你的 gradle/wrapper/gradle-wrapper.properties 将发行版 url gradle 版本更改为 5.6.2 希望这是你最后一次看到这个问题。

distributionUrl=https://services.gradle.org/distributions/gradle-5.6.2-all.zip

Answer 2

就我而言，我尝试了一切。我所能做的就是降级为：

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

---

Gradle版本

distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.2-all.zip

然后一切再次恢复正常。

Answer 3

我建议使用更高版本的google-services，对于我来说，该版本适用

    classpath 'com.google.gms:google-services:4.2.0'