Android - view_hierarchy

ViewGroup

A ViewGroup is a special view that can contain other views (called children.) The view group is the base class for layouts and views containers. This class also defines the ViewGroup.LayoutParams class which serves as the base class for layouts parameters.

ViewGroups is invisible container in which other Views can be placed. The class ViewGroup extends the class View Popular ViewGroups:

• LineraLayout
• RelativeLayout
• RelativeLayout
• MotionLayout
• ConstraintLayout

View represents the basic building block for user interface components. A View occupies a rectangular area on the screen and is responsible for drawing and event handling.

Popular Views:

• TextView
• ImageView
• EditText
• Button
• SeekBar

Summary:

View:

• View objects are the basic building blocks of User Interface(UI) elements in Android.
• View is a simple rectangle box which responds to the user’s actions.
• View refers to the android.view.View class, which is the base class of all UI classes.

ViewGroup:

• ViewGroup is the invisible container. It holds View and ViewGroup
• ViewGroup is the base class for Layouts.

Links

https://developer.android.com/reference/android/view/View
https://developer.android.com/reference/android/view/ViewGroup
https://stackoverflow.com/questions/27352476/difference-between-view-and-viewgroup-in-android
https://proandroiddev.com/the-life-cycle-of-a-view-in-android-6a2c4665b95e

credit goes to @swayangjit