UI Resources

(a) Views & ViewGroup

Views

• Views are the fundamental building blocks used to create a user interface (UI) in an app.
• Each view represents a visual component that the user can interact with or that displays information.
• Views are the basic or fundamental building block/object of the user interface which is created from the View class.
• Views is a small/large rectangular area on the screen and is responsible for drawing and event handling in the Android app.
• View is the base class for widgets, which are used to create interactive UI components like buttons, text fields, etc.
• Views in Android can be arranged and customized using XML layout files or programmatically through Java or Kotlin code.
• Some common View elements used in Android applications are:-

  • Basic Views:

    • TextView: This view displays text on the screen and can be used to show static or dynamically changing text content.
    • EditText: Allows users to input text. It’s used for accepting user input such as text, numbers, passwords, etc.
    • Button: Used to represent a clickable button that triggers an action/event when pressed by the user.
    • ImageView: Used to display images or drawables on the screen.

  • Container Views:

    • ScrollView: Allows scrolling of the contents if they exceed the screen size.
    • ListView: Displays a scrollable list of items. 
    • RecyclerView:  A more advanced and efficient list view that efficiently displays large sets of data by recycling views.
    • ViewPager: Enables the user to swipe left or right to view different content screens.
    • TabLayout: Represents tabs for switching between different views or sections within an app.
    • Navigation Drawer: A sliding panel that displays app navigation options.

  • Interactive Views:

    • CheckBox: Used to represent a box that can be checked or unchecked by the user.
    • RadioButton: Used to present a set of options where only one can be selected at a time.
    • SeekBar: Used to display a draggable bar allowing the user to select a value from a range.

  • Specialized Views:

    • DatePicker and TimePicker: Allow users to select dates and times respectively.
    • WebView: Displays web content within the app, allowing for the integration of web-based features.
    • Spinner:  Represents a dropdown list allowing users to select one item from multiple options.
    • SeekBar: Provides a draggable thumb to select a value from a range, often used for adjusting settings like volume or brightness.
    • ProgressBar: Indicates the progress of an operation or task that is going on or completed.

ViewGroup

• The ViewGroup is a subclass of View and provides an invisible container that holds other Views or other ViewGroups and defines their layout properties.

(b) Intent

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(c) Toast

Click this link for Toast details