This lesson shows how to work with Android layout.

Layout concept #

A layout defines the structure of the user interface. Layouts are built via views and view groups.

Views, sometimes also called “widgets,” represent interactable components such as:

  • TextView - component to render text
  • EditText - input field component where user can type text
  • Button - clickable text component with background

ViewGroups, sometimes also called “layouts,” represent invisible containers which define the position of its children on the screen. While Android SDK contains a number of view groups, which still can be used, Google not so long ago released a new view group called ConstraintLayout.

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