Xamarin Android FAQ Solution Rollup

The following prompt appears, error: The main class com.sun.tools.javac.MainMSB6006 could not be found or could not be loaded:

Or

Downloading message: â³ã example driver åœ appeal ndroid.support.v4.view.ViewPager Juan Indent workspace 鍦?

Remove Bin,obj Folder Regeneration

Or if it doesn't work, refer here http://blog.csdn.net/cctvcqupt/article/details/46636809

Your emulator is out of date, please update by launching Android Studio:
-Start Android Studio
-Select Menu "Tools > Android > SDK Manager"
-click "SDK Tools" tab
-Check "Android SDK Tools" checkbox
-click "OK"

The solution to this problem actually does not need me to summarize ... The error message is clear.

Open VisualStudio, Tools >ANDROID>SDK Manager, update Android SDK Tools

Unable to compile after opening Proguard

https://forums.xamarin.com/discussion/54656/ proguard-with-api-23-wont-compile-on-release-with-google-play-services-27-0-0-0
Https://forums.xamarin.com/discussion/45210/enable-proguard-error-c-program-files-access-is-denied
Https://www.shisujie.com/blog/Enable-ProGuard-Cause-Java-Exit

Run-time error does not display error details

Listening

Androidenvironment.unhandledexceptionraiser

Event

System.IO.IsolatedStorage cannot be used

Xamarin Android NuGet on System.IO.IsolatedStorage is fake, please swap with System.IO Read/write

Invalid System.IO operation

Make sure the path delimiter is correct

HttpWebRequest allowreadstreambuffering cannot be set to True

Mono currently does not implement this attribute, no solution

iOS cannot generate

Try turning off the option to optimize PNG

Xamarin Android FAQ Solution Rollup