firebase messaging from minSdkVersion error on android with flutter-CodePudding

When I debug on android I get the error shown in the photo

regarding minSdkVersion. I tried adding:

android {│
 defaultConfig {
 minSdkVersion 19 
} 
}

in the build.gradle file but it didn't work. Also I added:

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

in the local.properties file but that also didn't work

CodePudding user response：

Add this to the build.gradle

defaultConfig {
  minSdkVersion 21
  multiDexEnabled true
}

and

dependencies {
...

implementation 'com.android.support:multidex:1.0.3'
}