How to open app from browser?

Question

When a user try to register in my app a confirmation email is sent to him to confirm that he is the holder of the email address, when he clicks the link in the browser I want automatically open my app.

I tried to use this example

but receiving an error
Java.Lang.RuntimeException
Message=Unable to instantiate activity ComponentInfo{com.companyname.appname/appname.Droid.MainActivity}: java.lang.ClassNotFoundException: Didn't find class "appname.Droid.MainActivity" on path: DexPathList[[zip file "/data/app/com.companyname.appname-rPtplP6Nx2BE6ywnQEiSJg==/base.apk"],nativeLibraryDirectories=[/data/app/com.companyname.appname-rPtplP6Nx2BE6ywnQEiSJg==/lib/arm64, /data/app/com.companyname.appname-rPtplP6Nx2BE6ywnQEiSJg==/base.apk!/lib/arm64-v8a, /system/lib64, /hw_product/lib64, /system/product/lib64, /prets/lib64]]

Answer 1

Hello,

Welcome to our Microsoft Q&A platform!

Unable to instantiate activity ComponentInfo{com.companyname.appname/appname.Droid.MainActivity}: java.lang.ClassNotFoundException: Didn't find class "appname.Droid.MainActivity"

You can try to open up your MainActivity and within the ActivityAttribute on your MainActvity class, add a fully qualified name within a Name parameter of that attribute, this will force the Xamarin.Android build process to use a Java-class name of your choosing vs. the MD5-based one and thus it will match your manifest entry.

Example:

[Activity(Name = "MyApp.Mobile.Droid.MainActivity", Label = "MyApp", MainLauncher = true, Icon = "@mipmap/icon")]  
public class MainActivity : Activity  
{  
//...  
 }  

For more details, you can check: https://learn.microsoft.com/en-us/xamarin/android/platform/android-manifest

Best Regards,

Jessie Zhang

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