IT. Expert System.

All Known Implementing Classes:

AutoCompleteTextView, Button, CheckBox, CheckedTextView, Chronometer, CompoundButton, DateTimeView, DigitalClock, EditText, ExceptionTextView, ExtractEditText, FilterSurfaceView, GLSurfaceView, com.android.layoutlib.bridge.MockView, MultiAutoCompleteTextView, NumberPicker.CustomEditText, PreDrawListener.MyLinearLayout, RadioButton, RSSurfaceView, SearchView.SearchAutoComplete, SurfaceView, Switch, TextClock, TextView, ToggleButton, VideoView, VisibilityCallback.MonitoredTextView, WebView

Enclosing class:

ViewTreeObserver

public static interface ViewTreeObserver.OnPreDrawListener

• Method Summary

  Methods

  Modifier and Type	Method and Description
  boolean	onPreDraw() Callback method to be invoked when the view tree is about to be drawn.

• Method Detail

  • onPreDraw

    boolean onPreDraw()

    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:

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

    See Also:

    View.onMeasure(int, int), View.onLayout(boolean, int, int, int, int), View.onDraw(android.graphics.Canvas)