Compass Heading on DJI UX SDK - dji-sdk

Ive installed and run the dji ux sdk for android. Sdk registration success and able to access all three tab ( normal , modified n map view)
My question would be how to display compass.getheading() value to the main screen?
My understanding would be both in java n xml needed to be code.
Xml part is done.
Only the java part im pretty confuse.
Any help is highly appreciated.
link for image

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