Starting this morning, my flutter app build on android is failing with

Unsupported Android Plugin version: 3.5.4.

To be clear, it has been building fine for months. No changes to build files only the code. And suddenly this error appears.

Anyone know why and have any solutions?

Solutions tried:

• Updating gradle to 4.1.0, results in flutter build apk no longer building the apk, or, if it does, url_launcher starts throwing MissingPluginException.
• Run flutter clean and flutter pub cache repair

CodePudding user response：

It's known that if you upgraded your Flutter version to 2.5.0 and if an error ocurred during upgrade could lead to some dependencies deleted. (Many of my friends and I had suffered from this bug). If that it's not your case, try to invalidate cache and restart or re-download the dependencies from the Internet. Or upgrade the gradle and the flutter version.

CodePudding user response：

If you encounter such an error in your project, what fixed it for me was changing jcenter() to mavenCentral() in android/build.gradle

    repositories {
        google()
        mavenCentral()
    }

After believing this was the solution, the release build starting failing again with the same error. I managed to nail it down to in the android/app/build.gradle

    buildTypes {
        release {
            ...
            debuggable true // this was causing the error
            ...
        }
    }

Link to Git Issue