Flutter: build ndk version mismatch after upgrade

If this issue occurred after updating android studio to 3.6 or updating the gradle plugin or gradle wrapper, then you can simply select your locally installed NDK in the Project Structure Dialog

You can open the Project Structure Dialog by clicking File > Project Structure... or by pressing the hotkeys CTRL + ALT + SHIFT + S

Once the Project Structure Dialog is open, go to SDK Location and select your locally installed version of NDK under Android NDK Location. Typically this is installed somewhere in your user folder then \AppData\Local\Android\Sdk\ndk\%ndk version% at least for Windows.

Project Structure dialog screenshot

It's usually recommended to install the latest version fo NDK available and use that for your projects.

For Flutter apps, First you have to open the android path as a project. You can do it by opening some file for editing under the "android" folder end then click "Open for Editing in Android Studio" on top.

Then you can do as @Subaru suggests:

You can open the Project Structure Dialog by clicking File > Project Structure... or by pressing the hotkeys CTRL + ALT + SHIFT + S

Once the Project Structure Dialog is open, go to SDK Location and select your locally installed version of NDK under Android NDK Location. Typically this is installed somewhere in your user folder then \AppData\Local\Android\Sdk\ndk\%ndk version% at least for Windows.

The NDK version 20.0.5594570 can be install manually by going into android studio -> SDK manager -> SDK tools. Select the show package detail checkbox.

You will be able to see all the NDK versions available.

More details: https://developer.android.com/studio/projects/install-ndk