The LayoutInflater class is used to instantiate the contents of layout XML files into their corresponding View objects. In other words, it takes an XML file as input and builds the View objects from it.
What is inflate method in Android?
Instantiates a layout XML file into its corresponding View objects. It is never used directly. Instead, use Activity. … For performance reasons, view inflation relies heavily on pre-processing of XML files that is done at build time.
What is attach to root in Android?
in this case is the widget/layout that is surrounding the view objects that you want to inflate using findViewById(). attachToRoot: attaches the views to their parent (includes them in the parent hierarchy), so any touch event that the views recieve will also be transfered to parent view.
How do you use LayoutInflater in Kotlin?
Typically, you don’t ever need to directly use a LayoutInflater . Android does most of the layout inflation for you when you call setContentView() in the onCreate() method of your activity. So you, as the programmer, are responsible for making sure the views are inflated.
How do I get Inflater on Android?
How to use from method in android. view. LayoutInflater
- Context context;LayoutInflater.from(context)
- Context context;String name;(LayoutInflater) context.getSystemService(name)
- ViewGroup parent;LayoutInflater.from(parent.getContext())
What is onCreateOptionsMenu in android?
You use onCreateOptionsMenu() to specify the options menu for an activity. In this method, you can inflate your menu resource (defined in XML) into the Menu provided in the callback.
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 is Android ViewGroup?
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 a layout in Android?
Layouts Part of Android Jetpack. A layout defines the structure for a user interface in your app, such as in an activity. All elements in the layout are built using a hierarchy of View and ViewGroup objects. A View usually draws something the user can see and interact with.
How do I make my Android invisible?
setVisibility(View. GONE); you have the option to set the visibility to INVISIBLE and VISIBLE . Then you can play with the visibility as you like.
What is ActivityMainBinding in Android?
A binding class is generated for each layout file. By default, the name of the class is based on the name of the layout file, converting it to Pascal case and adding the Binding suffix to it. The above layout filename is activity_main. xml so the corresponding generated class is ActivityMainBinding .
How do you get layout on Kotlin?
View groups
- Select the Project > Android pane. In the app/res/layout folder, open the activity_main. xml file.
- Select the Text tab and change the root view group from ConstraintLayout to LinearLayout .
- Remove the TextView . In the LinearLayout element, add the android:orientation attribute and set it to vertical .
How do you get LayoutInflater in fragment?
The final way to get an instance of LayoutInflater, is from the method onCreateView (LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) in a Fragment. This just passes in the result of Activity. getLayoutInflater(), so everything above applies.
What are adapters in Android?
An Adapter object acts as a bridge between an AdapterView and the underlying data for that view. The Adapter provides access to the data items. The Adapter is also responsible for making a View for each item in the data set.
What is an android view?
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.