Xamarin Forms Android Error: Please install package 'Android Support Library'

Question

I recently uploaded my project to Git, and used a auto-generated Xamarin/Windows/MacOS/VisualStudio .gitignore file. I did a lot of work and testing on iOS, but now I\'m com

Answer 1

This problem usually occurs because of failing to download or install m2repository file.

You can try one of these three options:

1- You can let VS solves the problem it self. It can be done just by deleting (...\AppData\Local\Xamarin\Android.Support.v4) directory and then rebuild the project. VS will download and install what it needs. If it does't work, go to number 2.

2- Manually Downloading android_m2repository_rnn.zip and putting it into (...\AppData\Local\Xamarin\zips ) folder. VS will do the rest (including extracting and installing the file). You can download m2repositories from here:

https://dl-ssl.google.com/android/repository/android_m2repository_r33.zip

Just rename the number at the end of URL to what you need and then download the file.

Note: In some cases you might need to rename the file into it's MD5 hash of URL. (for me VS was a little stupid and doesn't do anything unless I renamed the m2repository file to it's MD5 hash).

Here is a list of some of MD5 hashes:

android_m2repository_r33.zip --> 5FB756A25962361D17BBE99C3B3FCC44.zip android_m2repository_r32.zip --> F16A3455987DBAE5783F058F19F7FCDF.zip android_m2repository_r31.zip --> 99A8907CE2324316E754A95E4C2D786E.zip android_m2repository_r30.zip --> 05AD180B8BDC7C21D6BCB94DDE7F2C8F.zip android_m2repository_r29.zip --> 2A3A8A6D6826EF6CC653030E7D695C41.zip android_m2repository_r28.zip --> 17BE247580748F1EDB72E9F374AA0223.zip android_m2repository_r27.zip --> C9FD4FCD69D7D12B1D9DF076B7BE4E1C.zip android_m2repository_r26.zip --> 8157FC1C311BB36420C1D8992AF54A4D.zip android_m2repository_r25.zip --> 0B3F1796C97C707339FB13AE8507AF50.zip android_m2repository_r24.zip --> 8E3C9EC713781EDFE1EFBC5974136BEA.zip android_m2repository_r23.zip --> D5BB66B3640FD9B9C6362C9DB5AB0FE7.zip android_m2repository_r22.zip --> 96659D653BDE0FAEDB818170891F2BB0.zip android_m2repository_r21.zip --> CD3223F2EFE068A26682B9E9C4B6FBB5.zip android_m2repository_r20.zip --> 650E58DF02DB1A832386FA4A2DE46B1A.zip android_m2repository_r19.zip --> 263B062D6EFAA8AEE39E9460B8A5851A.zip android_m2repository_r18.zip --> 25947AD38DCB4865ABEB61522FAFDA0E.zip android_m2repository_r17.zip --> 49054774F44AE5F35A6BA9D3C117EFD8.zip android_m2repository_r16.zip --> 0595E577D19D31708195A83087881EE6.zip

You can also find the list here: https://developer.xamarin.com/guides/android/troubleshooting/resolving-library-installation-errors/#Manually_Downloading_m2repository

3- Manually Downloading and Installing m2repository Files. The detailed process can be found here:

https://developer.xamarin.com/guides/android/troubleshooting/resolving-library-installation-errors/#Manually_Downloading_and_Installing_m2repository_Files