redrawing just a part in android view

Question

I extended a View and call the invalidate() method to force redrawing. I only redraw a part off the View, but everything else is black.

How can I stop clearing the screen before onDraw() is called?

score 3 · Accepted Answer · answered Feb 25 '12 at 11:27

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you can use invalidate(Rect) or invalidate(left, top, right, bottom)

answered Feb 25 '12 at 11:27

Vyacheslav Shylkin

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Thx, I didn't see that by myself. – Ussr Feb 25 '12 at 11:30
This method is now deprecated – beginner May 23 '22 at 10:22

score 0 · Answer 2 · edited Jan 27 '14 at 07:13

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I don't think this work. As I have used invalidate(Rect). In onDraw(Canvas), u can find the canvas height and width , the same as the view bounds. Canvas clip bounds is the same.

I think this might be work with a view group , but not a view.

edited Jan 27 '14 at 07:13

dd619

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answered Jan 27 '14 at 06:40

Carlyle_Lee

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redrawing just a part in android view

2 Answers2