How to fix "Android license status unknown" in flutter

Question

my flutter doctor -v result:

[√] Flutter (Channel stable, v1.0.0, on Microsoft Windows [Version 10.0.17134.472], locale fa-IR)
    • Flutter version 1.0.0 at C:\Android\flutter
    • Framework revision 5391447fae (6 weeks ago), 2018-11-29 19:41:26 -0800
    • Engine revision 7375a0f414
    • Dart version 2.1.0 (build 2.1.0-dev.9.4 f9ebf21297)

[!] Android toolchain - develop for Android devices (Android SDK 27.0.3)
    • Android SDK at c:\Android\android-sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-28, build-tools 27.0.3
    • ANDROID_HOME = C:\Android\android-sdk
    • Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1024-b02)
    X Android license status unknown.

[√] Android Studio (version 3.1)
    • Android Studio at C:\Program Files\Android\Android Studio
    • Flutter plugin version 29.0.1
    • Dart plugin version 173.4700
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1024-b02)

[√] Connected device (1 available)
    • HUAWEI CUN U29 • CCMBBCB6C0153603 • android-arm • Android 5.1 (API 22)

and when run:

flutter doctor --android-licenses

get me this result:

A newer version of the Android SDK is required. To update, run:
c:\Android\android-sdk\tools\bin\sdkmanager --update 

and when update sdkmanager show this error to me:

 Exception in thread "main" java.lang.NoSuchFieldError: FN_AAPT2
        at com.android.sdklib.BuildToolInfo.<init>(BuildToolInfo.java:362)

How can i solve this challenge?

Answer 1

I solved this problem by installing the command line tool.

And then rerun

flutter doctor --android-licenses

Answer 2

There is an SDK Manager Icon in the top right of Android Studio between the AVD manager icon and the magnifying glass. Click it. You get a modal that shows you are in System Settings -> Android SDK n the left menu. In the middle area there is an SDK Tools tab so click it. Check off the box that says "Android SDK Command-line Tools (latest)" and click Apply. It will install it (about 105M). Now run flutter doctor --android-licenses and say yes to everything. The error should be gone.