当我尝试在Flutter应用中使用Firebase时，会产生错误

Question

我想在flutter应用程序中使用firebase，但是当我按照firebase控制台中的说明尝试尝试重新安装该应用程序时，每次我都会弹出相同的错误！

我什至尝试创建一个新项目

https://codelabs.developers.google.com/codelabs/flutter-firebase/#6

这是我遵循的说明

我在VS代码中编码，而不是在Android Studio中！

这是错误！

CREATE FOREIGN TABLE fdw_foo.test1 (
    city_id         int not null,
    logdate         date not null,
    peaktemp        int,
    unitsales       int
) SERVER myserver
OPTIONS (schema_name 'foo', table_name 'test1');

我跑了扑扑医生-v

Launching lib\main.dart on Android SDK built for x86 in debug mode...
* Error running Gradle:
ProcessException: Process "D:\ACA Folder\Flutter Basics\google_demo_2\android\gradlew.bat" exited abnormally:


FAILURE: Build failed with an exception.

* Where:
Build file 'D:\ACA Folder\Flutter Basics\google_demo_2\android\app\build.gradle' line: 24

* What went wrong:
A problem occurred evaluating project ':app'.
> ASCII

* 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
  Command: D:\ACA Folder\Flutter Basics\google_demo_2\android\gradlew.bat app:properties

Please review your Gradle project setup in the android/ folder.
Exited (sigterm)

我的app / build.gradle文件

[√] Flutter (Channel stable, v1.9.1+hotfix.2, on Microsoft Windows [Version 10.0.17763.737], locale en-US)
    • Flutter version 1.9.1+hotfix.2 at D:\flutter
    • Framework revision 2d2a1ffec9 (3 weeks ago), 2019-09-06 18:39:49 -0700
    • Engine revision b863200c37
    • Dart version 2.5.0


[√] Android toolchain - develop for Android devices (Android SDK version 29.0.0)
    • Android SDK at C:\Users\Achintha\AppData\Local\Android\sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-29, build-tools 29.0.0
    • Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b03)
    • All Android licenses accepted.

[√] Android Studio (version 3.5)
    • Android Studio at C:\Program Files\Android\Android Studio
    • Flutter plugin version 39.0.3
    • Dart plugin version 191.8423
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b03)

[√] VS Code (version 1.38.1)
    • VS Code at C:\Users\Achintha\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension version 3.4.1

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

• No issues found!

我的项目级别的build.gradle文件

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 "com.example.google_demo_2"
        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 {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'com.google.firebase:firebase-analytics:17.2.0'
    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

我有同样的问题。您必须在依赖项（/android/build.gradle）中升级gradle版本（> = 3.3.0）

dependencies {
    classpath 'com.android.tools.build:gradle:3.3.0'
    classpath 'com.google.gms:google-services:4.3.2'
}

Answer 2

升级gradle版本后，

@jose答案部分正确。我还必须将Kotlin版本也更新为1.3.41

dependencies {
    classpath 'com.android.tools.build:gradle:3.5.0'
    classpath 'com.google.gms:google-services:4.3.2'
    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.3.41"
}

建议使用androidx（请选中以下框）