Could not GET 'play-services-location/maven-metadata.xml'. Received status code 502 from server: Bad Gateway

The problem is that a plugin (location in this case) didn't specify a fixed version of an Android library. So in order to find which versions are available, Gradle must go to the repository to check. In this case, that repository is Bintray, which has been down for days and returning HTTP 502 Bad Request.

The steps below provide a quick and dirty workaround so you can build the app while Bintray is down. A more proper solution would be to fork the plugin and make changes to your fork as suggested by Eldar Miensutov, but it might be a bit overkill for a temporary server error.

1. In the Project tool window (where your files are listed), scroll all the way down until you find Flutter Plugins. If you don't see it, make sure that Project is selected in the dropdown at the top of the Project tool window.
2. Open Flutter plugins, find location-4.0.0 and open it (you might have a different version number after location-, that's fine).
3. Open the file location-4.0.0/android/build.gradle
4. Find the line api 'com.google.android.gms:play-services-location:16.+'
5. Change it to api 'com.google.android.gms:play-services-location:16.0.0'. If your editor says that the file does not belong to your project, select "I want to edit this file anyway".

You should now be able to build the app.

This change is of course a temporary solution, and if you update the location plugin your changes will be overwritten. But at least you'll be able to build until Bintray comes online again (or until you had time to migrate to another more recently updated plugin).

OR

In case the problem is caused by the location plugin and you are able to update to the latest version of it (4.3.0 at the moment), that also seems to resolve the problem. In my case, I was stuck on an old version of Flutter and location because of some other packages that weren't compatible with Flutter 2.

It looks like a temporary issue, the server with these libraries is down. I have the same problem now with Room:

Could not GET 'https://google.bintray.com/exoplayer/androidx/room/room-common/maven-metadata.xml'. Received status code 502 from server: Bad Gateway

You can try using offline mode if you're using Android Studio, then it will use the cached version of this library if you have it until it is fixed.

UPD. I switched to an alpha version of a flutter lib which caused this (workmanager) and it works well now. As far as I understand it was depending on an old version of Android Room library which is not available anymore since Bintray is not available. The new version of Room is available as it's being downloaded thorough another link. So for you the solution could be updating to a newer version of Flutter location package or forking it and changing the version of play-services-location to the most recent one.

Main problem that location:3.2.4 has no strict Android dependecy version play-services-location:16.+

Straight way to workaround this problem is to add Gradle Constraints on transitive dependency and specify concrete version in app/build.gradle

Updated from comment. You don't need to modify dependency package or lib, you have to edit your project file app/build.gradle

dependencies {
...
  constraints {
    implementation('com.google.android.gms:play-services-location') {
        version {
            strictly "16.0.0"
        }
        because 'location: 3.2.4 does not specify version & google.bintray.com answers 502 Bad Gateway'
    }
  }
}

If you meet this issue with play-services-location under the location flutter package you can proceed with the next solution:

1. Do a fork of the repository flutterlocation
2. Do changes in the forked project. (All the changes you can check in this commit)
3. Commit it. Push it
4. In your project change the way you get the dependency from your forked library

  location:
    git:
      url: git://github.com/dreambitio/flutterlocation.git
      ref: release/3.2.4
      path: location/

4. Done

Few notes

• If version 3.2.4 works for you, you can just go with step 4

• Assume this scenario works for any other library. Fork->Hotfix->Change target

• Yeah, that's not a nice solution, but should allow you to proceed locally or with any CI tool.

For anyone who cannot find the folder in @Magnus's answer, you can open the file in path like

C:\flutter\.pub-cache\hosted\pub.dartlang.org\location-4.1.1\android\build.gradle

then change

api 'com.google.android.gms:play-services-location:16+'

to

api 'com.google.android.gms:play-services-location:16.0.0'

After hours of debugging. I fixed the build just by removing the old pubspec.lock file and updating the firebase_messaging from ^9.1.4 to ^11.1.0. I don't know why I don't know how this fixed the issue.

It seems something relating to dependencies.

I found the problematic dependency by running flutter run --verbose and analyzing the output.

For those having the issues, it seems that the Bintray server is down recently. My temporary fix for it is to switch the Gradle build to be offline to use the caches to build the app.

Go to android -> gradlew.bat and modify the following and rebuild your app :

@rem Execute Gradle "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS% --offline

U can turn off your internet so you can use your packages in offline mode, this is a solution to debug your apps until the server is back.

For React-Native developers, try to replace

maven { url 'https://google.bintray.com/exoplayer/' }

by

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

in project level build.gradle

just change distributionUrl in gradle-wrapper.properties to

distributionUrl=https://services.gradle.org/distributions/gradle-6.7-all.zip

it works for me .

You can resolve this issue by the following steps,

• Change the build.gradle file as below,
• Change the kotlin version to 1.4.0 or higher
• Remove jcenter() from repositories and add mavenCentral()
• Change build gradle tools version to 4.1.0 or higher

 buildscript {
    ext.kotlin_version = '1.4.0' // or higher
    repositories {
        google()
        mavenCentral()  // add this
        maven {
            url 'https://maven.google.com'
        }
        // jcenter()  //remove or comment this
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:4.1.0'  // or higher
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

allprojects {
    repositories {
        google()
        mavenCentral()  // add this
        maven {
            url 'https://maven.google.com'
        }
        // jcenter()  // remove or comment this
    }
}

rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
    project.evaluationDependsOn(':app')
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

• Change the gradle distribution version on gradle-wrapper.properties file to 6.7 or higher

#Fri Mar 23 08:50:38 IST 2022
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-6.7-all.zip

• Upgrade the dependencies by the following command

flutter upgrade

• Done.

I got a simple solution for this, it's working for me. It's not a very big change very small change. Increase the SDK version and all, just see below

    android {
        compileSdk 32
    
        defaultConfig {
            applicationId "com.example.abc"
            minSdk 21
            targetSdk 32
            versionCode 1
            versionName "1.0"
    
            testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
        }
}

Hope it will help.

This is usually solved by updating the gradle distribution in your gradle.wrapper.properties file. At least this is what worked for me (also solved CI/CD pipeline issue after this)

So i updated to :

distributionUrl=https://services.gradle.org/distributions/gradle-6.8.3-all.zip

After spending a week, i finally find out a temporary solution. On left side of VS code expand dependencies option and go to location and on the build.gradle file change the line as in the picture.

upgrading 'com.google.android.gms:play-services-ads-identifier:16+' plugin resolved me

Goto build.gradle(app) and change to latest version

   implementation 'com.google.android.gms:play-services-ads-identifier:18.0.1'

I had run into the same problem, did some workaround and it worked. In your android/build.gradle:

• change the kotlin version to ext.kotlin_version = '1.5.0'
• change android gradle version to: classpath 'com.android.tools.build:gradle:4.1.0'

Then go to android/gradle/wrapper/gradle-wrapper.properties and change distributionUrl to 6.9 like this:

• distributionUrl=https\://services.gradle.org/distributions/gradle-6.9-all.zip

Then flutter clean and run. :D

If you use gradle implementation(you may not use implementation, but visitors for this question may use), I could solve 502 problem like below.

implementation 'com.xxx.yyy:a.b.c' // not use +

before script I wrote(502 problem occured)

implementation 'com.xxx.yyy:a.b.+' // use +

You can try running the app without internet connection but it is not a permanent solution. Because without internet you can't build apk file.

Try this, it resolved my issue.

project level gradle file

buildscript {
    ext.kotlin_version = '1.3.50'
    repositories {
        google()
        mavenCentral() // <- replaced jcenter()
    }

dependencies {
    classpath 'com.android.tools.build:gradle:4.+' // <- updated this
    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    classpath 'com.google.gms:google-services:4.3.10'
    classpath 'com.google.firebase:firebase-crashlytics-gradle:2.4.1'
    }

}

allprojects {
    repositories {
        google()
        mavenCentral() // <- replaced jcenter()
    }
}

also, on gradle-wrapper.properties:

distributionUrl=https\://services.gradle.org/distributions/gradle-6.7.1-all.zip // <- updated this

I got this 502 error " bad gateway https://kotlin.bintray.com/kotlinx/androidx/room/room-common/maven-metadata.xml" when trying to run this codelab in Android Studio: https://github.com/google-developer-training/android-kotlin-fundamentals-apps/tree/master/DevBytesRepository

I fixed it by making the following changes in the "build.gradle(Project:DevBytesRepository) file:

1 - Add repository mavenCentral()

2 - remove jcenter() repository

3 - Remove maven { url "https://kotlin.bintray.com/kotlinx/" } as per below:

buildscript {
ext.kotlin_version = '1.3.72'
repositories {
    google()
    mavenCentral()
    //jcenter()
}
allprojects {
    repositories {
        google()
        mavenCentral()

      //  maven { url "https://kotlin.bintray.com/kotlinx/" }
    }