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Android Build a Simple Android App with Java Creating the Screen Layout Getting to Know Our Tools

Grade error message - Install missing platform and syncs project - installed, but still getting error when Run

Getting an error message in Messages when trying to Run the first app. It pops up an Error that reads, "Failed to find target with hash string 'android-26' in... then it gives the location. Followed by "Install missing platform(s) and syncs project". Followed steps to do so, but keeps throwing same error out.

Try "Install missing platform(s) and syncs project" another time!

1 Answer

By using only xmlns:app it's work for android v26

<font app:font="@font/cuprum_regular" app:fontStyle="normal" app:fontWeight="400"/>