What is onViewCreated?
What is onViewCreated?
onViewCreated(View view, Bundle savedInstanceState) Called immediately after onCreateView(LayoutInflater, ViewGroup, Bundle) has returned, but before any saved state has been restored in to the view. This gives subclasses a chance to initialize themselves once they know their view hierarchy has been completely created.
What is activity activity cycle with diagram?
app. Activity class. The android Activity is the subclass of ContextThemeWrapper class. An activity is the single screen in android….Android Activity Lifecycle methods.
| Method | Description |
|---|---|
| onCreate | called when activity is first created. |
| onStart | called when activity is becoming visible to the user. |
What is the use of onActivityCreated?
onActivityCreated(Bundle) tells the fragment that its activity has completed its own Activity. onCreate() . onViewStateRestored(Bundle) tells the fragment that all of the saved state of its view hierarchy has been restored.
What are retained fragments?
A Fragment represents a reusable portion of your app’s User Interface. Retained Fragment consists of the configuration change that causes the underlying Activity to be destroyed. The term “retained” refers to the fragment that will not be destroyed on configuration changes.
What is SetContentView?
SetContentView is used to fill the window with the UI provided from layout file incase of setContentView(R. layout. somae_file). Here layoutfile is inflated to view and added to the Activity context(Window).
What are the different phases of the activity life cycle?
An Android activity goes through six major lifecycle stages or callbacks. These are: onCreate() , onStart() , onResume() , onPause() , onStop() , and onDestroy() . The system invokes each of these callbacks as an activity enters a new state.
What is onSaveInstanceState () and Onrestoreinstancestate () in activity?
onSaveInstanceState method gets called typically before/after onStop() is called. This varies from Android version to version. In the older versions it used to get before onStop() . Inside this method, we save the important values in the Bundle in the form of key value pairs.
What is difference between fragment and FragmentActivity?
If you want to use Fragments in an app targeting a platform version prior to HoneyComb, you need to add the Support Package to your project and use the FragmentActivity to hold your Fragments . The FragmentActivity class has an API for dealing with Fragments , whereas the Activity class, prior to HoneyComb, doesn’t.