Introduction to Android Development (v) Screen Components 5.1 view and ViewGroup

Activity (Active) contains views (views) and viewgroups (view groups).

View is a component (Widget) that is displayed on the screen. View Example: button, label (TextView), and text box (EDITTEXT). Each view is inherited from the base class Android.view.View.

The View group (ViewGroup) can contain one or more view. ViewGroup itself is a special view that provides a layout that you can use to organize a series of view views.

Examples of viewgroups: LinearLayout and Framelayout. Each "ViewGroup" inherits from the base class Android.view.ViewGroup.

Android offers the following viewgroups:

LinearLayout

Absolutelayout

Tablelayout

Relativelayout

Framelayout

<scrollview

In the next few tutorials, each viewgroup is described in detail. Note that typically, when you create a UI, you mix one or several different viewgroup.

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