error: No resource identifier found for attribute 'textAlignment' in package 'android'

Question

This is my res/layout mobile.xml file. Where is my mistake? When I run textview has this error.

    
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Answer 1

textAlignment was added in API level 17 (Android 4.2).

Your emulator/device will need to be running 4.2+ for this to work.

Otherwise just use android:gravity="center"