What is getFragmentManager?
Meanwhile the definition of getFragmentManager() (or in this case getSupportFragmentManager() ) is: Return the FragmentManager for interacting with fragments associated with this fragment’s activity. Basically, the difference is that Fragment’s now have their own internal FragmentManager that can handle Fragments.
What is the difference between activity life cycle and fragment lifecycle?
It is always hosted by an activity. It has its own layout and its own behavior with its own life cycle callbacks. We can add or remove fragments in an activity while the activity is running….Difference Table.
| Activity | Fragment |
|---|---|
| Activity can exist without a Fragment | Fragment cannot be used without an Activity. |
What is setTargetFragment?
setTargetFragment(target) lets the “called” fragment know where to send the result. onActivityResult() is called manually in this case.
What is defaultNavHost?
The app:defaultNavHost=”true” attribute ensures that your NavHostFragment intercepts the system Back button. Note that only one NavHost can be the default. If you have multiple hosts in the same layout (two-pane layouts, for example), be sure to specify only one default NavHost .
What is ViewPager?
ViewPager is a layout manager that allows the user to flip left and right through pages of data. It is mostly found in apps like Youtube, Snapchat where the user shifts right – left to switch to a screen. Instead of using activities fragments are used.
What is popUpToInclusive?
popUpTo and popUpToInclusive app:popUpTo tells the Navigation library to pop some destinations off of the back stack as part of the call to navigate() . The attribute value is the ID of the most recent destination that should remain on the stack.
What is a NavHostFragment?
NavHostFragment provides an area within your layout for self-contained navigation to occur. NavHostFragment is intended to be used as the content area within a layout resource defining your app’s chrome around it, e.g.:
What is TabLayout?
TabLayout is used to implement horizontal tabs. TabLayout is released by Android after the deprecation of ActionBar. TabListener (API level 21). TabLayout is introduced in design support library to implement tabs. Tabs are created using newTab() method of TabLayout class.
What is ImageView?
An ImageView control is used to display images in Android applications. An image can be displayed by assigning it to the ImageView control and including the android:src attribute in the XML definition of the control. Images can also be dynamically assigned to the ImageView control through Java code.
What is in Android?
FragmentActivity. Base class for activities that wish to use some of the newer platform features on older Android devices. Base class for activities that want to use the support-based Fragments . When using the tag, this implementation can not use the parent view’s ID as the new fragment’s ID.
What is a fragment in an activity?
A fragment is a modular part of an activity. It has its own lifecycle and receives its own input events. Fragments can created, added or removed while the activity is running. Consider a fragment a “sub activity” that you can reuse in different activities. But you could ignore fragments and just use activities if you wish — but not recommend.
Do I inflate my activity fragment?
Note, if your fragment does not use a UI (such as providing the activity with background behavior) you do not inflate of course. Importantly, fragments do not have to be registered in the manifest like activities are.
Can fragments use Android UI components?
We will develop the ActionTab app to best illustrate how fragments can use Android UI components such as ActionBar (more on that in a moment). The ActionTab app will combine multiple fragments (four in all) in a single activity to build a multi-pane UI.