You asked: What is view and ViewGroup in Android Studio?

View is a basic building block of UI (User Interface) in android. A view is a small rectangular box that responds to user inputs. Eg: EditText, Button, CheckBox, etc. ViewGroup is an invisible container of other views (child views) and other ViewGroup. Eg: LinearLayout is a ViewGroup that can contain other views in it.

What is a ViewGroup in Android Studio?

A ViewGroup is a special view that can contain other views. The ViewGroup is the base class for Layouts in android, like LinearLayout , RelativeLayout , FrameLayout etc. In other words, ViewGroup is generally used to define the layout in which views(widgets) will be set/arranged/listed on the android screen.

What is the main purpose of a ViewGroup?

What is the main purpose of a ViewGroup? It groups together the most common views that developers use in Android apps. It serves as a container for View objects, and is responsible for arranging the View objects within it. It is required to make a view interactive as a way to group TextViews on a screen.

What is the meaning of view in Android Studio?

1. The View v is the object of your xml file which is referred in your onCreate method. To refer any component from xml you have to use v to gets its id of the component. Condition. You have give id to the component in xml if you want to use onClick in your class file.

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What is a view in Android development?

A View occupies a rectangular area on the screen and is responsible for drawing and event handling. The View class is a superclass for all GUI components in Android. Commonly used Views are : EditText. ImageView.

What is Clipchildren?

2, can through android:layout_gravity control over how the part of the display. … 3, Android:clipchildren meaning: whether to limit the child view within its scope.

What are views called in Android?

A View object is a component of the user interface (UI) like a button or a text box, and it’s also called a widget. Examples are EditText, Button, CheckBox, etc. For example, LinearLayout is the ViewGroup that contains Button(View), and other Layouts also.

What is the main component in Android?

Android applications are broken down into four main components: activities, services, content providers, and broadcast receivers. Approaching Android from these four components gives the developer the competitive edge to be a trendsetter in mobile application development.

What is the use of linear layout in Android?

LinearLayout is a view group that aligns all children in a single direction, vertically or horizontally. You can specify the layout direction with the android:orientation attribute. Note: For better performance and tooling support, you should instead build your layout with ConstraintLayout.

What is a ViewGroup?

ViewGroup is a invisible container of other views (child views) and other viewgroups. Eg: LinearLayout is a viewgroup which can contain other views in it. ViewGroup is a special kind of view which is extended from View as its base class.

What is FindViewById?


Finds a view that was identified by the id attribute from the XML that was processed in OnCreate(Bundle).

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What does setOnClickListener do in android?

One of the most usable methods in android is setOnClickListener method which helps us to link a listener with certain attributes. While invoking this method a callback function will run. One can also create a class for more than one listener, so this can lead you to code reusability.

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