gradle fails on using flutter in Android Studio

Question

I'm a newbie to both Android Studio and Flutter. I recently wanted to try Flutter and hence installed the plugin in Android Studio. My Flutter code has no bugs, but the gradle fails.

app level build gradle:

def localProperties = new Properties()  //here, Properties gets highlighted as error
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.")        //here,GradleException gets highlighted as error
}

apply plugin: 'com.android.application'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"

android {
    compileSdkVersion 27

    lintOptions {
        disable 'InvalidPackage'
    }

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.mee.createevent"
        minSdkVersion 16
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
        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 {
    compile 'com.google.firebase:firebase-core:16.0.1'
    implementation 'com.google.android.gms:play-services-analytics:16.0.1'
    implementation 'com.google.firebase:firebase-analytics:16.0.1'
    implementation 'com.google.firebase:firebase-firestore:17.0.2'
    implementation 'com.google.firebase:firebase-functions:16.0.1'
    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'

module level build gradle

buildscript {
    repositories {
        google()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.2'
        classpath 'com.google.gms:google-services:4.0.1'
    }
}

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
}

My error:

FAILURE: Build failed with an exception.

* What went wrong:
Failed to notify dependency resolution listener.
> The library com.google.android.gms:play-services-measurement-base is being requested by various other libraries at [[16.0.0,16.0.0]], but resolves to 15.0.2. Disable the plugin and check your dependencies tree using ./gradlew :app:dependencies.
> The library com.google.firebase:firebase-analytics is being requested by various other libraries at [[16.0.1,16.0.1]], but resolves to 15.0.2. Disable the plugin and check your dependencies tree using ./gradlew :app:dependencies.

* 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 20s
Finished with error: Gradle build failed: 1

I've tried including some dependencies such as the play-service version and the firebase analytics versions, but this error doesn't perish and the Properties and GradleException remain highlighted in red as errors.I don't understand how to solve this problem.

pubspec.yaml

name: create_event
description: A new Flutter application.

dependencies:
  cloud_firestore:

  flutter:
    sdk: flutter

  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^0.1.2

dev_dependencies:
  flutter_test:
    sdk: flutter


# For information on the generic Dart part of this file, see the
# following page: https://www.dartlang.org/tools/pub/pubspec

# The following section is specific to Flutter.
flutter:

  # The following line ensures that the Material Icons font is
  # included with your application, so that you can use the icons in
  # the material Icons class.
  uses-material-design: true

  # To add assets to your application, add an assets section, like this:
  # assets:
  #  - images/a_dot_burr.jpeg
  #  - images/a_dot_ham.jpeg

  # An image asset can refer to one or more resolution-specific "variants", see
  # https://flutter.io/assets-and-images/#resolution-aware.

  # For details regarding adding assets from package dependencies, see
  # https://flutter.io/assets-and-images/#from-packages

  # To add custom fonts to your application, add a fonts section here,
  # in this "flutter" section. Each entry in this list should have a
  # "family" key with the font family name, and a "fonts" key with a
  # list giving the asset and other descriptors for the font. For
  # example:
  # fonts:
  #   - family: Schyler
  #     fonts:
  #       - asset: fonts/Schyler-Regular.ttf
  #       - asset: fonts/Schyler-Italic.ttf
  #         style: italic
  #   - family: Trajan Pro
  #     fonts:
  #       - asset: fonts/TrajanPro.ttf
  #       - asset: fonts/TrajanPro_Bold.ttf
  #         weight: 700
  #
  # For details regarding fonts from package dependencies,
  # see https://flutter.io/custom-fonts/#from-packages

When I open app level build gradle image flutter (It says it cannot resolve Properties() and FileNotFoundException() )

But, the same set of errors are resolved and gradle sync is successful when I click the "Open for editing in Android Studio" image androidStudio

But,this success in Android Studio case, doesn't reflect in the Flutter one. It still has those errors.

Answer 1

When i got this same problem, the only way that i can find to solution it was update gradle versions:

in android/gradle/wrapper/gradle-wrapper.properties

to distributionUrl=https\://services.gradle.org/distributions/gradle-6.0.1-all.zip

and

in android/build.gradle

to dependencies { classpath 'com.android.tools.build:gradle:3.5.3' classpath 'com.google.gms:google-services:4.3.2'

and in android/build.gradle yet

buildscript {
    ext.kotlin_version = '1.3.61'

in pubspec.yaml

firebase_core: ^0.4.2+1 
  cloud_firestore: ^0.12.11

I hope that it can help you.

Answer 2

Have you tried adding the google maven repository to your project level build.gradle file?

buildscript {
repositories {
    google()
    jcenter()
    maven {
        url "https://maven.google.com"
    }
}

either the buildscript section or the allprojects section.