Attribute application@name at AndroidManifest.xml:5:9-42 requires a placeholder substitution but no value for <applicationName> is provided. - Flutter

Question

Upon running a project I'm getting following error.

Launching lib\main.dart on SM N970F in debug mode...
lib\main.dart:1
Parameter format not correct -
D:\CIIT GUIDE\Flutter\Apps\multi_delivery_app\android\app\src\main\AndroidManifest.xml:5:9-42 Error:
    Attribute application@name at AndroidManifest.xml:5:9-42 requires a placeholder substitution but no value for <applicationName> is provided.
D:\CIIT GUIDE\Flutter\Apps\multi_delivery_app\android\app\src\debug\AndroidManifest.xml Error:
    Validation failed, exiting

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:processDebugMainManifest'.
> Manifest merger failed with multiple errors, see logs

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

This is how build.gradle looks like in android/app.

android {
    compileSdkVersion 29
    // buildToolsVersion '26.0.3'

    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.multi_delivery_app"
        minSdkVersion 28
        targetSdkVersion 29
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
        // Stackoverflow solution
        manifestPlaceholders = [appAuthRedirectScheme: "com.example.multi_delivery_app"]   
    }

    buildTypes {
        release {
            signingConfig signingConfigs.debug
        }
    }

I found a couple of solutions of it online, which are related to react-native but nothing is working. Following is the link of the solution that I tried. https://stackoverflow.com/a/52178888/7290043

Solution 1

I think in build.gradle should add the applicationName key with the full name of the Android Application class (which extends the FlutterApplication)

For example:

defaultConfig {
    ...
    manifestPlaceholders = [appAuthRedirectScheme: "com.example.multi_delivery_app", 
                            applicationName: "com.example.multi_delivery_app.Application"]
}

Solution 2

You can add the appAuthRedirectScheme attributes to the manifestPlaceholders instead of replacing the whole array, by using += instead of =

Example :

defaultConfig {
    ...
    manifestPlaceholders += [appAuthRedirectScheme: "com.example.multi_delivery_app"]
}

Comments

[Elad Nava]

If your build.gradle isn't overriding manifestPlaceholders and you still face this issue, upgrading Flutter to 2.10.2 (run flutter upgrade) will resolve the issue as older Flutter SDKs did not inject the manifestPlaceholders which Flutter v2 embedding relies on.

[Admin]

As it’s currently written, your answer is unclear. Please edit to add additional details that will help others understand how this addresses the question asked. You can find more information on how to write good answers in the help center.

[Moses Aprico]

This is the way