Modify flutter.gradle under ./flutter/packages/flutter_tools/gradle to upgrade the tools version to 3.2.1 and add google() to the first line:

buildscript {
repositories {
google()
jcenter()
maven {
url 'https://dl.google.com/dl/android/maven'
}
}
dependencies {
classpath 'com.android.tools.build:gradle:3.2.1'
}
}

Screenshot of my code

I solved the problem by moving:

maven {
url 'https://dl.google.com/dl/android/maven2'
}

in the top of:

jcenter()

in the file: .flutter/packages/flutter_tools/gradle/flutter.gradle:

    buildscript {
repositories {
maven {
url 'https://dl.google.com/dl/android/maven2'
}
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.1.2'
}
}

This is just a bug in the Gradle file located at C:\flutter\packages\flutter_tools\gradle\flutter.gradle at line 25.

All you have to do is just edit this file by moving it to the top:

maven {
url 'https://dl.google.com/dl/android/maven2'
}

Change from this

buildscript {
repositories {


jcenter()
maven {
url 'https://dl.google.com/dl/android/maven2'
}
}
dependencies {
classpath 'com.android.tools.build:gradle:3.1.2'
}
}

to this:

buildscript {
repositories {
maven {
url 'https://dl.google.com/dl/android/maven2'
}
jcenter()
}
dependencies {`enter code here`
classpath 'com.android.tools.build:gradle:3.1.2'
}
}

All the previous answers resolve the problem. One comment to add is the location of the flutte.gradle.

You will find it in the directory that you installed Flutter in for the first time and not on the Flutter project.

This is related to Flutter 0.9.4 at the moment. It will be fixed in the next release. In the meantime, you can update Flutter manually by running the commands described in "Flutter Upgrade". Basically they involve the following:

1. Change the Flutter GitHub channel to master by running on the command prompt:

   flutter channel master
   

2. Upgrade Flutter itself by running

   flutter upgrade
   

Once the upgrade is done, run the test drive application, and it should compile successfully.

I also newbie in flutter and just installed it today. And I found the same problem as you, but after three hours googling I finally solved it.

The steps I have done are as follows:

1. Copy "flutter.gradle" file from "https://github.com/flutter/flutter/blob/master/packages/flutter_tools/gradle/flutter.gradle" into "C:\flutter\packages\gradle"

2. Then modify the content, for this part:

   buildscript {
   repositories {
   google()
   jcenter()
   }
   dependencies {
   classpath 'com.android.tools.build:gradle:3.2.1'
   }
   }
   

   to:

   buildscript {
   repositories {
   maven {
   url 'https://dl.google.com/dl/android/maven2'
   }
   jcenter()
   }
   dependencies {
   classpath 'com.android.tools.build:gradle:3.2.1'
   }
   }
   

3. In "c:\flutter\bin", run this command:

   flutter channel master
   

   Wait until finished, and then run this command:

   flutter upgrade
   

4. Wait until it finished, then re-run the project to debug,

5. and finally the application appeared on the emulator screen.

   Picture finally running

Flutter Master Upgrade

I just had this problem. The fix for me however was a lot simpler. After switching branches to dev and upgrading, I switched back to master and it worked perfectly fine.

flutter checkout dev
flutter upgrade

Then switch back

flutter checkout master
flutter upgrade
flutter run

Solution:

Put
maven {
url 'https://dl.google.com/dl/android/maven2'
}
at the top of:
jcenter()

in the file: .flutter/packages/flutter_tools/gradle/flutter.gradle : The file is in the Flutter SDK.

Just try to upgrade Flutter using the following:

flutter upgrade

(This issue has been fixed in the latest update.)

Regarding this error, I just changed this line in the build.gradle file:

classpath 'com.android.tools.build:gradle:3.1.2'

to:

classpath 'com.android.tools.build:gradle:3.1.3'

And that solved my problem.

For me, opening the gradle-wrapper.properties file and editing the below line like this version solved it:

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

this fixed my issue,SO reference here:

In your root build.gradle make sure google() is before jcenter().

repositories {
google()
jcenter()
}

In most projects you will have to update this at 2 spots.

buildscript {
repositories {
google()
jcenter()
}


}


allprojects {
repositories {
google()
jcenter()
}
}

When I encountered this error Flutter 1.0 had been released. The previous issues were fixed and still I was getting the same error.

The following steps fixed it for me :

1) Changing Gradle plugin version from 3.1.2 to 3.2.1 in your_project/android/build.gradle inside 'dependencies' section -

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

2) Changing Gradle wrapper version from 4.4 to 4.6 in your_project/android/gradle/wrapper/gradle-wrapper.properties like so

distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip

I have fix it with update version build.gradle

dependencies {
classpath 'com.android.tools.build:gradle:3.3.2'
..............
}

I have fix just by replacing these sentences:

allprojects {
repositories {
mavenCentral()
jcenter()
maven {
url 'https://maven.google.com/'
name 'Google'


}
}
}

instead of these:

allprojects {
repositories {
jcenter()
google()
}
}

in build.gradle file and then replace compile with implementation in dependencies