activity is like canvas where you put your drawing as view. Yes you can set all above four view in single activity but it will depend how you handle it and does your app needs it to be done like this.
Is activity a view Android?
The Activity and Controller are still part of the view layer, but the distinction between controller and view is much more clear. Activities and Fragments are even referred to as UI controllers in the documentation for the new Android Architecture Components.
What do you mean by Android activities and views?
An activity represents a single screen with a user interface just like window or frame of Java. Android activity is the subclass of ContextThemeWrapper class. … However, it’s important that you understand each one and implement those that ensure your app behaves the way users expect.
What is difference between activity and layout?
A layout is made up of definitions written in XML. Each definition is used to create an object that appears on screen, like a button or some text. An activity is the java code which attaches actions and puts content to/in a layout. For this the Activity loads the layout.
What is activity in Android with example?
An activity provides the window in which the app draws its UI. This window typically fills the screen, but may be smaller than the screen and float on top of other windows. … Typically, one activity in an app is specified as the main activity, which is the first screen to appear when the user launches the app.
How are layouts placed in Android?
Layout files are stored in “res-> layout” in the Android application. When we open the resource of the application we find the layout files of the Android application. We can create layouts in the XML file or in the Java file programmatically. First, we will create a new Android Studio project named “Layouts Example”.
What is the use of view in Android?
View. 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.
How many types of views are there in Android?
In Android apps, the two very central classes are the Android View class and ViewGroup class.
What are the types of layout?
There are four basic types of layouts: process, product, hybrid, and fixed position.
What is layout and activity?
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. … Whereas a ViewGroup is an invisible container that defines the layout structure for View and other ViewGroup objects, as shown in figure 1.
Which layout is best in Android?
- LinearLayout is perfect for displaying views in a single row or column. …
- Use a RelativeLayout, or even better a ConstraintLayout, if you need to position views in relation to siblings views or parent views.
- CoordinatorLayout allows you to specify the behavior and interactions with its child views.
Which is better fragment or activity?
Activities are an ideal place to put global elements around your app’s user interface, such as a navigation drawer. Conversely, fragments are better suited to define and manage the UI of a single screen or portion of a screen. Consider an app that responds to various screen sizes.
What are the four essential states of an activity?
Hence, all in all there are four states of an Activity(App) in Android namely, Active , Paused , Stopped and Destroyed .