评估根项目“android”时出现问题。 >未能通知项目评估监听者

Question

flutter 代码编译错误

在调试模式下在 sdk gphone x86 上启动 lib\main.dart...

失败：构建失败并出现异常。

• 地点： 构建文件'A:\flutterclass\sourcecodes\ecommerce app\complete_flutter_ecommerce\android\build.gradle'行：42

• 出了什么问题： 评估根项目“android”时出现问题。

配置项目“:app”时出现问题。 未能通知项目评估监听者。 > 'org.gradle.api.file.RegularFileProperty org.gradle.api.file.ProjectLayout.fileProperty(org.gradle.api.provider.Provider)'

• 尝试： 使用 --stacktrace 选项运行以获取堆栈跟踪。使用 --info 或 --debug 选项运行以获得更多日志输出。使用 --scan 运行以获得完整的见解。

• 访问 https://help.gradle.org

  获取更多帮助

2 秒内构建失败 异常：Gradle 任务 assembleDebug 失败，退出代码为 1 已退出 (sigterm)

1

Answer 1

我的项目示例代码。但我不知道错误是什么

Androidmanifest.xml

    <manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.santosenoque.chatapp">

    <!-- The INTERNET permission is required for development. Specifically,
         flutter needs it to communicate with the running application
         to allow setting breakpoints, to provide hot reload, etc.
    -->
    <uses-permission android:name="android.permission.INTERNET"/>

    <!-- io.flutter.app.FlutterApplication is an android.app.Application that
         calls FlutterMain.startInitialization(this); in its onCreate method.
         In most cases you can leave this as-is, but you if you want to provide
         additional functionality it is fine to subclass or reimplement
         FlutterApplication and put your custom class here. -->
    <application
        android:name="${applicationName}"
        android:label="chat_app"
        android:icon="@mipmap/ic_launcher">
        <activity
            android:name=".MainActivity"
            android:launchMode="singleTop"
            android:theme="@style/LaunchTheme"
            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection|fontScale|screenLayout|density"
            android:hardwareAccelerated="true"
            android:windowSoftInputMode="adjustResize">
            <!-- This keeps the window background of the activity showing
                 until Flutter renders its first frame. It can be removed if
                 there is no splash screen (such as the default splash screen
                 defined in @style/LaunchTheme). -->
            <meta-data
                android:name="flutterEmbedding"
                android:value="2" />
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
    </application>
</manifest>

Gradle 包装器属性

#Fri Jun 23 08:50:38 CEST 2017
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-all.zip

build.gradle 文件< /strong>

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


android {
    compileSdkVersion 29

    lintOptions {
        disable 'InvalidPackage'
    }

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.santosenoque.chatapp"
        minSdkVersion 16
        targetSdkVersion 27
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName 
        testInstrumentationRunner "android.support.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 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    implementation "com.android.support:support-v4:27.1.1"
    implementation 'com.google.firebase:firebase-analytics:17.2.2'
}

build.gradle 文件

buildscript {
    repositories {
        google()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.1'
        classpath 'com.google.gms:google-services:4.2.0'
    }
}

subprojects {
    project.configurations.all {
        resolutionStrategy.eachDependency { details ->
            if (details.requested.group == 'com.android.support'
                    && !details.requested.name.contains('multidex') ) {
                details.useVersion "27.1.1"
            }
            if (details.requested.group == 'androidx.core'
                    && !details.requested.name.contains('androidx') ) {
                details.useVersion "1.0.2"
            }
        }
    }
}

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
}

ma​​in.dart

import 'package:chat_app/provider/app.dart';
import 'package:chat_app/provider/product.dart';
import 'package:chat_app/provider/user.dart';
import 'package:chat_app/screens/home.dart';
import 'package:chat_app/screens/login.dart';
import 'package:chat_app/screens/splash.dart';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';

void main() {
  WidgetsFlutterBinding.ensureInitialized();
  runApp(MultiProvider(providers: [
    ChangeNotifierProvider.value(value: UserProvider.initialize()),
    ChangeNotifierProvider.value(value: ProductProvider.initialize()),
    ChangeNotifierProvider.value(value: AppProvider()),


  ], child: MaterialApp(
    debugShowCheckedModeBanner: false,
    theme: ThemeData(
        primaryColor: Colors.white
    ),
    home: ScreensController(),
  ),));
}

class ScreensController extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final user = Provider.of<UserProvider>(context);
    switch(user.status){
      case Status.Uninitialized:
        return Splash();
      case Status.Unauthenticated:
      case Status.Authenticating:
        return Login();
      case Status.Authenticated:
        return HomePage();
      default: return Login();
    }
  }
}