updateDisplay() Question

The API for UIEngine.updateDisplay says:

Updates the display with pending graphics operations. This method flushes any queued graphics operations and updates the contents of the front buffer with the back buffer, making the contents of the back buffer to appear on the handheld's physical display. This technique allows applications to perform multiple operations on the back buffer and then flush all changes at once to the front buffer. This is done automatically after a paint, but an application may choose to do it explicitly when performing animations.
Drawing on the back buffer is done with methods on the Graphics object returned from Screen.getGraphics(), and these will be clipped to the extent of the screen. Note that Screen.getGraphics() may in some circumstances return an off-screen buffer. 

Then can I call instead of invalidate() updateDisplay() to refresh the screen after that I drew everything in memory buffer first?

Thank you

Thank you.  I know how to do this in the GameCanvas class but I was trying not to use since you can not take full advantage of the Blackberry device.

I found to do using the RIM API, however.  I do the same code, design of an offscreen Graphics object and then draws the bitmap of this object to the graphics object in the paint method.  The only difference is that when I paint everything to the offscreen graphics object, I do and whether the system wait its done using invokeAndWait().  This stopped the flickering and/or tearing of graphics.

Thank you

Tags: BlackBerry Developers

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