What is fragment and its lifecycle?
Fragment lifecycle states
The Fragment is added by an Activity (which acts as the host of the Fragment ). Once added, the Fragment goes through three states, as shown in the figure below: Active (or resumed) Paused. Stopped.
What is the fragment in Android?
A Fragment represents a reusable portion of your app’s UI. A fragment defines and manages its own layout, has its own lifecycle, and can handle its own input events. Fragments cannot live on their own–they must be hosted by an activity or another fragment.
What is the life cycle of Android activity?
An Android activity goes through six major lifecycle stages or callbacks. These are: onCreate() , onStart() , onResume() , onPause() , onStop() , and onDestroy() .
What is fragments in Android with example?
A Fragment is a combination of an XML layout file and a java class much like an Activity . Using the support library, fragments are supported back to all relevant Android versions. Fragments encapsulate views and logic so that it is easier to reuse within activities.
What is activity and fragment in Android?
Activity is the part where the user will interacts with your application. In other words, it is responsible for creating a window to hold your UI components. (UI components and how to build a layout will be discussed in another article). Fragment represents a behavior or a portion of user interface in an Activity.
What are fragments?
Fragments are incomplete sentences. Usually, fragments are pieces of sentences that have become disconnected from the main clause.
Why do we use fragments?
According to the Android documentation, a fragment is a part of applications user interface that is bound to an activity. Fragments have their lifecycle and layouts or UI components. Fragments help enrich your UI design, pass data between different screens, and adapt to different device configurations.
What is splash screen in Android?
Android Splash Screen is the first screen visible to the user when the application’s launched. Splash screen is one of the most vital screens in the application since it’s the user’s first experience with the application.
What is difference between activity and fragment?
Activity is an application component that gives a user interface where the user can interact. The fragment is only part of an activity, it basically contributes its UI to that activity. Fragment is dependent on activity. It can’t exist independently.
What does finish () do in Android?
On Clicking the back button from the New Activity, the finish() method is called and the activity destroys and returns to the home screen.
What is activity life cycle method?
Android Activity Lifecycle methods
|onCreate||called when activity is first created.|
|onStart||called when activity is becoming visible to the user.|
|onResume||called when activity will start interacting with the user.|
|onPause||called when activity is not visible to the user.|
Can we use fragment without activity in Android?
Android app must have an Activity or FragmentActivity that handles the fragment. Fragment can’t be initiated without Activity or FragmentActivity.
Which method is called only once in a fragment lifecycle?
Methods of the Android Fragment
|onAttach()||The very first method to be called when the fragment has been associated with the activity. This method executes only once during the lifetime of a fragment.|
|onCreate()||This method initializes the fragment by adding all the required attributes and components.|
What is an API in Android?
An Application Programming Interface (API) is a particular set of rules (‘code’) and specifications that programs can follow to communicate with each other.