Issue seems to be related to buildToolsVersion. Changing it from:

compileSdkVersion(30)
buildToolsVersion("30.0.3")

To:

compileSdkVersion(30)
buildToolsVersion("30.0.2")

Fixed it to me (syntax may change if you're not using .gradle.kts file or gradle version >= gradle-7.0, but the idea is the same)

(AndroidStudio will show: Old buildToolsVersion 30.0.2; recommended version is 30.0.3 or later in build file. But the Warnings will be gone from gradle building logs.)

I also faced the same isuue. Update your Gradle to latest version and update buildToolsVersion("30.0.3") to 4 or :10 in build.gradle (Module) file in android.

Your android SDK version and emulator API level must be the same.

If you are using the Android SDK version is 31 and trying to run over emulator API level 30 it would cause you some complications.

You must use the same level for both (android SDK and API level) to avoid many complications.

I had a project showing this warnings. The Gradle Version was set to 7.0.2 and Android Gradle Plugin Version to 4.2.2. After changing the Android Gradle Plugin Version to 7.0.3 the problem was solved.

The mismatch is due to:

• Android Gradle Plugin Version
• Gradle Version

Match them as per the gradle plugin releases

Ref: https://developer.android.com/studio/releases/gradle-plugin

And the warnings will go away. cheers.

Project Structure > Project and change Android Gradle Plugin Version to 7.0.3 or higher if available and Gradle Version to 7.3 or higher if available

add

compileSdkVersion(30)
buildToolsVersion("30.0.1")

instead of

compileSdkVersion flutter.compileSdkVersion

in app/build.gradle

What works for me is the same as https://stackoverflow.com/a/70035679/17825313

But I could not find that menu in my AndroidStudio so have to update the content of these 2 files directly:

Basically just use the latest gradle plugin and gradle version and make sure they both match according to the official doc

android/build.gradle

buildscript {
   repositories {
       ...
   }

   dependencies {
      classpath 'com.android.tools.build:gradle:7.0.0'
      ...
   }
}

android/gradle/wrapper/gradle-wrapper.properties

... 
distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-all.zip

I had the same problem (using VS Code) and searched global (ctrl+shift+F): compileSdkVersion and instead of:

    compileSdkVersion flutter.compileSdkVersion

I changed it:

    compileSdkVersion 30

this worked for me, now it runs without the warning!

this changes work for me with last gradle version 7.3.3

just edit this versions and build your app

android/build.gradle

buildscript {
   repositories {
       ...
   }

   dependencies {
      classpath 'com.android.tools.build:gradle:7.0.0'
      ...
   }
}

android/gradle/wrapper/gradle-wrapper.properties

...
distributionUrl=https\://services.gradle.org/distributions/gradle-7.3.3-all.zip