google_maps_flutter broken with Flutter version 2.10.2

Question

I have used google_maps_flutter in my flutter application but when I updated the flutter to the version 2.10.2 this has broken the version.

The plugin google_maps_flutter requires a higher Android SDK version.                         │
│ Fix this issue by adding the following to the file                                            │
│ C:\Users\howle\Documents\GitHub\TicketDistribution\android\app\build.gradle:                  │
│ android {                                                                                     │
│   defaultConfig {                                                                             │
│     minSdkVersion 20                                                                          │
│   }                                                                                           │
│ }                                                                                             │
│                                                                                               │
│ Note that your app won't be available to users running Android SDKs below 20.                 │
│ Alternatively, try to find a version of this plugin that supports these lower versions of the │
│ Android SDK.  

I followed the steps of changing the version but it hasnt seemed to work, So I was wondering if any other devs are facing this issue or have a solution?

I will put my build.gradle, and localproperties file below. app/build.gradle

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 flutter.compileSdkVersion

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    defaultConfig {
        minSdkVersion 20
    }

    kotlinOptions {
        jvmTarget = '1.8'
    }

    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.example.ticket_distribution_app"
        minSdkVersion flutter.minSdkVersion
        targetSdkVersion flutter.targetSdkVersion
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }

    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"
}

local.properties

sdk.dir=C:\\Users\\howle\\AppData\\Local\\Android\\sdk
flutter.sdk=C:\\flutter
flutter.buildMode=debug
flutter.versionName=1.0.0
flutter.versionCode=1
flutter.minSdkVersion=20
flutter.targetSdkVersion=20

Cheers In advance devs.

Solution

Update your android -> app -> build.gradle file with this code from android to above than buildTypes. compileSdkVersion will be the android version on which the app is being compiled. minSdkVersion is for lowest android version that your app can be compatible with. Mostly now the packages demand 21 as the minSdk so set it to 21 but with 20 it should be working now too because you was missing multidex too and that contains some code which is used to run the app.

android {
          
compileSdkVersion 30

compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
}

kotlinOptions {
    jvmTarget = '1.8'
}

sourceSets {
    main.java.srcDirs += 'src/main/kotlin'
}

defaultConfig {
    applicationId "com.example.ticket_distribution_app"
    minSdkVersion 21
    multiDexEnabled true
    targetSdkVersion 30
    versionCode 1
    versionName "1.0.0"
}

Note: Make sure if you are using flutter 2.10.0-2.10.2 then change compileSdkVersion to 31

Comments

[Will Hlas]

Try changing compileSdkVersion and minSdkVersion to 21 from app/build.gradle and see if that works.

[Riley-Howley]

I tried that but it still gave me the error. Thanks for trying!

[Will Hlas]

Oh shoot I meant for you to change compileSdkVersion to 30 or 31! Looks like you got it working though :D

[Riley-Howley]

Cheers, I did what you said and it solved my issue. Then I updated my kotlin to a newer version and now hoping it compiles thankyou very much!

[Ahmad Hassan]

Glad I helped you. Sorry I missed the kotlin part I forgot to mention that but anyway good luck with your application!