You can easily use Facebook app on your android device and it make handier to use from anywhere anytime. You have simply log in your Facebook id with the correct user's credential. If you are seeing that Facebook app keep closing on your android device, then you have to reinstate it and also check the internet connection. If you are still getting the same issue, then talk to Facebook Account Recovery for instant solutions. https://www.emailcontacthelp.com/facebook-password-recovery-reset-hacked.html