When I developed flutter app on android, I encountered problem that shows “Running Gradle task ‘assembleDebug’” forever.
I share how to solve this problem.

Environment

OS: Windows 10
flutter: 2.10.2
Android Studio: 2021.1.1 Patch 1

Solution

Open flutter project using Android studio.
And then click the following instructions.
File -> Project Structure

Project Settings -> Project -> Project SDK
Change <No SDK> to Android API *.
Before:

Project Settings -> Modules -> Module SDK on Dependecies tab.
Change <No SDK> to Android API *.
Before:

Finally build this project. Probably you may complete to build a few minutes later.

Reference

• Android Studioで「Running Gradle task ‘assembleDebug’…」のまま進まない
• Running Gradle task ‘assembleDebug’ Forever…