Friday, March 18, 2011

Android Some Tips

Android some Tips

Views and ViewGroups

An Activity contains Views and ViewGroups. A View is a widget that has an appearance on screen. Examples of widgets are buttons, labels, text boxes, etc. A View derives from the base class android.view.View.
One or more Views can be grouped together into a ViewGroup. A ViewGroup (which is by itself is a special type of View) provides the layout in which you can order the appearance and sequence of views. Examples of Viewgroups are LinearLayout, FrameLayout, etc. A ViewGroup derives from the base class android.view.ViewGroup.
Android supports the following ViewGroups:

  • LinearLayout
  • AbsoluteLayout
  • TableLayout
  • RelativeLayout
  • FrameLayout
  • ScrollView


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