Hello, I am facing such a problem, I do not understand why it is
java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v4/view/ViewCompat;
Do you use Phase extension ?
If yes see
yes I’m using Phase
See above post and you will find your solution
I signed up for the fellow’s beta test
thank you for your help
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Problem solved ?
there is no warning message. But the design of sleep is broken, it does not work correctly. No, not resolved
Use this
Download [Version: 2.2.0] [Release date: 03/04/2020]
io.shreyash.phase.aix (109.3 KB)
Or if you use beta testing of the companion download phase extension from
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I upgraded the plugin to 2.2.0 and 2.2.1 versions problem persists. There is still a warning message
Maybe @Shreyash can help you more , for me it works great with no problem. Depending the platform, I use either version 2.2.0 for Kodular projects or version 2.2.1 for MIT App Inventor projects (supports latest version that requires AndroidX)
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I am using codulars. 2.2.0 version. The application is running. When I click on the CardView it gives a warning message.
The design works normally. Warning message after clicking CardViev-e operation does not work
exported and tried. works without any problems
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I just noticed that you have to delete extension and then imported again. Even thought I get the message that extension is updated it doesn’t work
Then you might want to try this:
I can’t uninstall and reinstall. I used phases in different places in my project. Is there any other way? I uninstalled my companion and downloaded it again
You don’t need to reinstall the extension. Delete the AppInventor/assets directory on your phone like explained here. It should work after that.
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can you please provide app link of working companion 2021-07-16T18:30:00Z