Android APIs
Added in API level 1
public static interface

ViewTreeObserver.OnPreDrawListener

android.view.ViewTreeObserver.OnPreDrawListener
Known Indirect Subclasses

Class Overview

Interface definition for a callback to be invoked when the view tree is about to be drawn.

Summary

Public Methods
abstract boolean onPreDraw()
Callback method to be invoked when the view tree is about to be drawn.

Public Methods

public abstract boolean onPreDraw ()

Added in API level 1

Callback method to be invoked when the view tree is about to be drawn. At this point, all views in the tree have been measured and given a frame. Clients can use this to adjust their scroll bounds or even to request a new layout before drawing occurs.

Returns
boolean Return true to proceed with the current drawing pass, or false to cancel.