In Android, Fragment is a part of an activity which enable more modular activity design. In this course, Android Fundamentals: Fragments, you'll start with the most basic and fundamental concepts of fragments and progressively dive into deeper topics. As @jonney said it, you would need to deal with a parcelable interface to serialize your objects you wish to pass. Communication between fragments and activities is harder. Fragments are components of the Android UI. In some android apps, Tabs are used, which allows developers to combine multiple tasks (operations) on a single activity. It will not be wrong if we say a fragment is a kind of sub-activity. A FragmentManager manages Fragments in Android, specifically it handles transactions between fragments. Fragments can implement a number of application behaviors, such as, code to handle listeners, files, database, etc. However they are very useful and well worth getting to understand. So, when deciding to use a fragment, I would ask myself the following questions: Is the lifecycle of the fragment different from the activity's lifecycle? It is also possible to provide different feel like left and right swipe by using ViewPager.And to implement this topic, few terms are required such as ViewPager, Fragments, and TabLayout. Although Android Fragments have been part of the Android API for nearly three years, I find that developers still often struggle to understand their value and purpose. addToBackStack(null) Android introduced fragments in Android 3.0 (API level 11 – honeycomb). In this Android fragment tutorial, we will learn how to use fragments in Android with code. For most beginners, and even more experienced devs, they are a mystifying. FragmentScenario attaches this type of fragment to an empty activity, one that doesn't have a root view. The Android documentation describes Fragment as a portion of user interface in an Activity Object. and First, you'll learn how to add fragment to an activity and will also learn about fragment lifecycle. In layman's terms, this means an Activity object can be composed of one or more fragments, each having its own user interface definition. A common explanation of Fragments, and one I sometimes even use myself, is: Fragments group user interface components and their associated logic. Next, you'll learn types of fragment transactions. Fragment Tutorial With Example In Android Studio. Design Pattern For Fragment. It gives us an interface for interacting with fragments. Fragment transactions can involve two different types of tags. It represents a behaviour or a portion of user interface in an Activity. FragmentTransaction. On another side, it provides a different look to that app. Here we find out exactly what Fragments are all about. Main aim for this is to support more dynamic and flexible UI designs on large screens, such as tablets. These types of fragments can be thought of as invisible worker for the activity -- more later on this. After launching one of these fragment types, FragmentScenario drives the fragment under test to the RESUMED state. Contents. FragmentTransaction gives us methods to add, replace, or remove fragments in Android. In our previous sample code, we used ListFragment; see the Creating and managing fragments section for ListFragment. While fragments are strongly integrated into the UI you can use fragments without a view or UI components. In the larger screen of the tablet, there is much more space to combine and interchange the UI components effectively. This book is currently being revised. This fragment is similar to ListActivity and contains a ListView view by default. This state indicates that the fragment is running and visible to the user. 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