Game Closing

Device - Android - Galaxy J7

Problem: Crashing. When I open up Minecraft Pocket Edition it will bring me to the title screen. And not long after it signs me into Xbox Live the game will close and force me back to my phones home screen.
As I looked around I noticed that for crashing I needed a crash report. I'm not sure if one is needed for this and if it is could you tell me where to find it.