apk failed to install in emulator and andriod phone

Question

Hello everyone.
I am a beginner of Android app developer. I am using Visual Studio 2019 community to create a android app by using Xamarin Form. The app works fine in Emulator in both debug and release mode. Then I successfully rebuild in Release mode and archive an apk file, but this apk is failed to install in the Emulator ( by dropping the apk file to Emulitor) and Android phone ( by copying the apk to phone and installing). For test purpose, I also used VS2019 to create a default Mobile App (Xamarin.Forms) and then build and archive it. I got the same problem.

By the way, I following the instruction in https://learn.microsoft.com/en-us/xamarin/android/deploy-test/release-prep/?tabs=windows, but the problem still exists.

Does anyone could help me? Thanks a lot.

Answer 1

Hello,​

Welcome to our Microsoft Q&A platform!

Based on your error, I find a way to fix it

In your AndroidManifest.xml, add android:extractNativeLibs="true" to the <application> tag the following parameter:

   <application android:label="TestArchieApp.Android" android:theme="@style/MainTheme" android:extractNativeLibs="true"></application>  

This is due to a change in the android gradle plugin, which changed the default value from true to false in Version 3.6.0 (Source: https://developer.android.com/guide/topics/manifest/application-element#extractNativeLibs).

And when re-build your application. If you get the following error.

   Error Found tag id where item is expected  

Please enable the Use incremental Android packaging system(aap2) in the Android Options tag. and Linking set to None

Best Regards,

Leon Lu

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