OnSurfaceChanged called twice

Question

I am creating an Android application using openGL ES and I have the following problem:

When I minimize the application, then open it again, onSurfaceChanged in my GLSurfaceView.Renderer is called 2 times.

I have the following code in onSurfaceChanged (and similar code in onSurfaceCreated, onDrawFrame):

Log.e("onSurfaceChanged",Integer.toString(width)+" "+Integer.toString(height));

So, I get the following log:

onSurfaceCreated
onSurfaceChanged 480 800
onDrawFrame
onSurfaceChanged 480 800
onDrawFrame
onDrawFrame
onDrawFrame
onDrawFrame
onDrawFrame
onDrawFrame
(...)

When I minimize, I change the screen orientation from portrait to landscape, and then open it again, onSurfaceChanged is called 3 times. And the magazine:

onSurfaceCreated
onSurfaceChanged 480 800
onDrawFrame
onSurfaceChanged 480 800
onDrawFrame
onDrawFrame
onDrawFrame
onSurfaceChanged 800 480
onDrawFrame
onDrawFrame
onDrawFrame
onDrawFrame
onDrawFrame
onDrawFrame
(...)

My question is: is this a mistake? Is there an Android error in my application? Is there a way that onSurfaceChanged is called only once? (because in onSurfaceCreated I am executing code that slows down the application)

Answer 1

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