'How to change Android minSdkVersion in flutter project

I was trying to start a flutter project for an App using bluetooth to communicate. For that, I was using flutter blue.

Unfortunately, when trying to run (on an Android device) the first example I created I was met with the following error:

FAILURE: Build failed with an exception.

  * What went wrong:
  Execution failed for task ':app:processDebugManifest'.
  > Manifest merger failed : uses-sdk:minSdkVersion 16 cannot be smaller than version 19 declared in library [:flutter_blue] /home/maldus/Projects/flutter/polmac/build/flutter_blue/intermediates/manifests/full/debug/AndroidManifest.xml as the library might be using APIs not available in 16
    Suggestion: use a compatible library with a minSdk of at most 16,
            or increase this project's minSdk version to at least 19,
            or use tools:overrideLibrary="com.pauldemarco.flutterblue" to force usage (may lead to runtime failures)

If I were on Android Studio, I'd know how to bump up the Android minSdkVersion, but on a flutter project (using VSCode) I was a little lost.

Is it possible to increase the minSdkVersion with flutter, and how?

Solution 1:^[1]

Flutter 2.8 or Later

build.gradle update

Before Updating to Flutter 2.8

android {
    compileSdkVersion 30

defaultConfig {
    applicationId "com.example.app"
    minSdkVersion 21
    targetSdkVersion 30
    versionCode flutterVersionCode.toInteger()
    versionName flutterVersionName
    multiDexEnabled true
}

After updating to Flutter 2.8:

android {
    compileSdkVersion flutter.compileSdkVersion

defaultConfig {
        applicationId "com.example.app"
        minSdkVersion flutter.minSdkVersion
        targetSdkVersion flutter.targetSdkVersion
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }

You should change from local.properties following instruction:

First go to the android->local.properties

And changes from here

Change like this from build.gradle

android {
    compileSdkVersion localProperties.getProperty('flutter.compileSdkVersion').toInteger()

defaultConfig {
    minSdkVersion localProperties.getProperty('flutter.minSdkVersion').toInteger()
    targetSdkVersion localProperties.getProperty('flutter.targetSdkVersion').toInteger()
    versionCode flutterVersionCode.toInteger()
    versionName flutterVersionName
}

Solution 2:^[2]

If you didn't know, Google Playstore only allows minSdkVersion to be 20 or above. But flutter has still set default minSdkVersion to 16. Can you see that you'll be always obliged to manually change for each new project?

All your suggestions above are good, but they are not the best, because you will be forced to temper with the build.gradle for each new project you create.

The best way is to modify the value of the global minSdkVersion variable from its source, so all projects, new or old, will adopt it. Remember flutter.minSdkVersion means that the variable is in flutter directory (with the sdk).

The file in question is flutter.gradle.

the address is flutter-directory/packages/flutter_tools/gradle/flutter.gradle

class FlutterExtension {
    /** Sets the compileSdkVersion used by default in Flutter app projects. */
    static int compileSdkVersion = 31

    /** Sets the minSdkVersion used by default in Flutter app projects. */
    static int minSdkVersion = 16

    /** Sets the targetSdkVersion used by default in Flutter app projects. */
    static int targetSdkVersion = 31

change the value of the minSdkVersion from 16 to 20 or above, and do not disturb the code in build.gradle.

If you want, you can watch a video I made on Youtube, explaining it under: flutter configure minSdkVersion from 16 to 20 or above

Solution 3:^[3]

You can change the minSdkVersion in the file Project_Name/android/app/build.gradle , defaultconfig :

defaultConfig {
    // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
    applicationId "com.example.projectname"
    minSdkVersion 16 // <--- There
    targetSdkVersion 27
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}

Solution 4:^[4]

For flutter v2.8

Inside local.properties add

sdk.dir='<path>'
flutter.sdk='<path>'
flutter.buildMode=debug
flutter.versionName=1.0.0
flutter.versionCode=1

flutter.minSdkVersion=21
flutter.targetSdkVersion=30
flutter.compileSdkVersion=30

app-level build.gradle

defaultConfig {
    minSdkVersion localProperties.getProperty('flutter.minSdkVersion').toInteger()
    targetSdkVersion localProperties.getProperty('flutter.targetSdkVersion').toInteger()
    versionCode flutterVersionCode.toInteger()
    versionName flutterVersionName
}

Now you can use localProperties.getProperty() to read the value from the properties file.

Solution 5:^[5]

With the new Flutter projects (2.8.0), with the 'Flutter style', you able to change minimum sdk version in local.properties (instead of editing app/build.gradle file).

# android/local.properties

flutter.minSdkVersion=19

Look in android/app/build.gradle file, you'll see the variable constraint like this:

# android/app/build.gradle

android {

  defaultConfig {
    minSdkVersion flutter.minSdkVersion
    targetSdkVersion flutter.targetSdkVersion
    versionCode flutterVersionCode.toInteger()
    versionName flutterVersionName
  }
}

Solution 6:^[6]

If your app requires a specific minimum version of the Android platform, you can specify that version requirement as API level settings in the app's build.gradle file. During the build process, these settings are merged into your app's manifest file. Specifying API level requirements ensures that your app can only be installed on devices that are running a compatible version of the Android platform.

You have to do set minSdkVersion in build.gradle file, located in <app dir>/android/app and set a value in the defaultConfig block:

There are two API level settings available:

minSdkVersion — The minimum version of the Android platform on which the app will run, specified by the platform's API level identifier.
targetSdkVersion — Specifies the API level on which the app is designed to run. In some cases, this allows the app to use manifest elements or behaviors defined in the target API level, rather than being restricted to using only those defined for the minimum API level.

To specify default API level requirements in a build.gradle file, add one or more of the settings above to the defaultConfig {} block, nested inside the android {} block. You can also override these default values for different versions of your app by adding the settings to build types or product flavors. The following build.gradle file specifies default minSdkVersion and targetSdkVersion settings in the defaultConfig {} block and overrides minSdkVersion for one product flavor.

android {
   compileSdkVersion 29

  ...
  defaultConfig {
    applicationId "com.app.yourapp"
    minSdkVersion 16
    targetSdkVersion 29
    versionCode flutterVersionCode.toInteger()
    versionName flutterVersionName
  }
  productFlavors {
    main {
      ...
    }
    afterLollipop {
      ...
      minSdkVersion 21
    }
  }
}

For more information, see the uses-sdk-element manifest element documentation and the API Levels document.

Solution 7:^[7]

Follow these steps to change the minSdkVersion problem.

First=> YouProject_name/android/app/build.gradle

Second=> defaultconfig { //you can find it inside build.gradle }

defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.umair.product_details_using_crud"
        minSdkVersion 16 // here you can change minSdkVersison
        targetSdkVersion 28
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }

Solution 8:^[8]

All answers are best. But the following way is best in changing SdkVersion after Flutter 2.8 :

Go to your root directory where flutter is installed. It should be like

C:\src\flutter\flutter

Then go to

packages>Flutter tools>gradle>

In Gradle, you will see many files, locate flutter.gradle . Right-click on it and edit it with text editor/notepad.

here you will find all SDK versions. Change them, save, and then you are ready to go

the complete path should be like this: (in my case)

C:\src\flutter\flutter\packages\flutter_tools\gradle

Solution 9:^[9]

Add the following lines to android/local.properties file:

flutter.versionCode=1
flutter.versionName=0.0.1
flutter.flutterMinSdkVersion=24
flutter.flutterTargetSdkVersion=31

Add the following lines at the top-level in the file may be after "def versionName =" in the file android/app/build.gradle:

def flutterMinSdkVersion = localProperties.getProperty('flutter.flutterMinSdkVersion')
if (flutterMinSdkVersion == null) {
    flutterMinSdkVersion = '16'
}

def flutterTargetSdkVersion = localProperties.getProperty('flutter.flutterTargetSdkVersion')
if (flutterMinSdkVersion == null) {
    flutterMinSdkVersion = '31'
}

finally edit the section of the build.gradle that match as follows:

    defaultConfig {
        applicationId "do.main.subdomain" // Use your App ID
        minSdkVersion flutterMinSdkVersion.toInteger()
        targetSdkVersion flutterTargetSdkVersion.toInteger()
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }

Once all this is done you are good to go. Next time you want to update something you only have to change one file.

Solution 10:^[10]

I encountered this problem setting up Auth0, flutter_appauth and flutter_secure_storage within my flutter app. After changing the minSdkVersion version, I got this error

C:\Users\myusername\AndroidStudioProjects\wole\android\app\src\debug\AndroidManifest.xml Error:
    Attribute data@scheme at AndroidManifest.xml requires a placeholder substitution but no value for <appAuthRedirectScheme> is provided.
FAILURE: Build failed with an exception.

What went wrong: Execution failed for task ':app:processDebugManifest'.

Manifest merger failed : Attribute data@scheme at AndroidManifest.xml requires a placeholder substitution but no value for is provided.

The solution is adding manifestPlaceholders thus

view image

Solution 11:^[11]

Setting minSdkVersion, targetSdkVersion, and compileSdkVersion are a little bit different starting from Flutter 2.8. Now the gradle file in your_flutter_app/android/app/build.gradle path looks like this:

Just replace the current values with the version numbers you want, like this:

Now run your flutter project, and that's it.

Solution 12:^[12]

In the current version of flutter (2.10.4) you should change it by going into Flutter sdk folder/packages/open flutter_tools open /gradle then open flutter.gradle and find static int minSdkVersion and change as per requirement

e.g: C:\Workspace\flutter\packages\flutter_tools\gradle\flutter.gradle

Solution 13:^[13]

defaultConfig { // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html). applicationId "com.example.map" minSdkVersion 19 targetSdkVersion flutter.targetSdkVersion versionCode flutterVersionCode.toInteger() versionName flutterVersionName }

Solution 14:^[14]

It's found inside the defaultconfig on [project_name]/android/app/build.gradle. defaultconfig

Solution 15:^[15]

app/build.gradle add this version code

Solution 16:^[16]

first run flutter clean

then change the minSdkVersion in the file Project_Name/android/app/build.gradle , defaultconfig :

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1
Solution 2
Solution 3	Trect
Solution 4
Solution 5	dphans
Solution 6	ElectricShadow
Solution 7	Javad Dehban
Solution 8	Aizan Sagheer
Solution 9
Solution 10	Chandan
Solution 11	Sayed Mahmood Sayedi
Solution 12
Solution 13	user18722626
Solution 14	Malith Hashendre
Solution 15
Solution 16	Danial Hussain

'How to change Android minSdkVersion in flutter project

Solution 1:[1]

Solution 2:[2]

Solution 3:[3]

Solution 4:[4]

Solution 5:[5]

Solution 6:[6]

Solution 7:[7]

Solution 8:[8]

Solution 9:[9]

Solution 10:[10]

Solution 11:[11]

Solution 12:[12]

Solution 13:[13]

Solution 14:[14]

Solution 15:[15]

Solution 16:[16]