I just downloaded Visual Studio 2019 and Xamarin because I want to start developing mobile applications with C#, however, several of the Android SDK components were out of date or not installed. I have been able to install and update all of them (I think) except for the Android SDK Build Tools which throws an error every time I try to start downloading the update. I originally had version 25.0.3 downloaded and it was prompting me to download version 28.0.3. After I uninstalled version 25.0.3 it stopped asking me to update, but told me that I had a missing component, and trying to install version 28.0.3 was still throwing an error. I reinstalled version 25.0.3 and it started telling me to update again which I cannot do. How do I install the Android SDK Build Tools v28.0.3?

  • What exactly are you asking here? Please make edits. – juniorRubyist Jun 10 '19 at 23:21

This problem should not be present in the latest version of Visual Studio.

You can try this: Go to Tools -> Options -> Xamarin -> Android Settings and check the "AutoInstall Android SDKs" checkbox. Then double-click on the error and it should resume installation of the missing SDK.

Source: https://developercommunity.visualstudio.com/content/problem/322974/clicking-the-missing-android-sdk-error-message-doe.html

  • I tried this. After I accept the terms and conditions it says "Waiting for License Agreement" in the corner and then stops and the error reappears. – Hans Jun 10 '19 at 14:41

I circumvented the problem by downloading the Build Tools here: https://androidsdkmanager.azurewebsites.net/Buildtools I then simply unzipped them to the build-tools folder at "C:\Program Files (x86)\Android\android-sdk\build-tools". Everything seems to be working fine now.

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