Question: What Is Difference Between Fragment and Activity in Android?

Activity is the part where the user will interacts with your application. … Fragment represents a behavior or a portion of user interface in an Activity. You can combine multiple fragments in a single activity to build a multi-pane UI and reuse a fragment in multiple activities.

Which is better activity or fragment?

To put it simply : Use fragment when you have to change the UI components of application to significantly improve app response time. Use activity to launch existing Android resources like video player, browser etc.

What is the relationship between activity and fragment?

Fragment must be hosted by an activity and they can not execute independently. Fragment they have their own life cycle which mean they can start an app. for example: they have onCreate() method so the fragment can add their own menu items to host an activity menu.