How to change package, versionCode, minSdkVersion and targetSdkVersion for Android And Flutter (Set the application ID)

 Go Root Path Of Project

Path:- your_project_folder\android\app\build.gradle

android {
    defaultConfig {
        applicationId "com.example.myapp"
        minSdkVersion 15
        targetSdkVersion 24
        versionCode 1
        versionName "1.0"
    }
    ...
}

Flutter minsdkversion deprecated

Step 1

Path:- your_project_folder\android\app\build.gradle

Step 2 

The defaultConfig should look like this inside the build.gradle file

Change of minSdkVersion 16 to 23 

defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.your_package_name_here"
        minSdkVersion 23
        targetSdkVersion 29
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }

Cmd:- flutter clean

Cmd:- flutter pub get

KeyWord Problem

uses-sdk:minSdkVersion 16 cannot be smaller than version 23 declared in library

// TODO: Specify your own unique Application ID 

(https://developer.android.com/studio/build/application-id.html).

C:\Users\Utilisateur\AndroidStudioProjects\xylophone_flutter\android\app\src\debug\AndroidManifest.xml Error:
    uses-sdk:minSdkVersion 16 cannot be smaller than version 23 declared in library [:audioplayers] C:\Users\Utilisateur\AndroidStudioProjects\xylophone_flutter\build\audioplayers\intermediates\library_manifest\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 23,
        or use tools:overrideLibrary="xyz.luan.audioplayers" to force usage (may lead to runtime failures)

FAILURE: Build failed with an exception.