Modify android project to add dpad support

I have an messaging app which can only be navigated by keys, I'm using a datepicker which currently the keys can not navigate to ok and cancel button.

also in original app the user clicks on details to get more info, but that cannot be accessed by click so I added a clickable details button which shall go to the details page

3. when clicking on an image in should open in full screen, same for video it should play when clicked, same for audio.

4. add emoji keyboard