On Jun 15, 10:36 pm, Romain Guy <[email protected]> wrote:
> > Drawable s =
> > mCtx.getResources().getDrawable(R.drawable.symbol_icon);
> > Where s is a local variable to rendering. Suppose I call this 37
> > times.
> > Am I to assume that Android will do something smart like create only
> > one bitmap for this resource even if it is used 37 times?
>
> Drawables loaded from resources share as much data as possible. In
> this case, the 37 instances would use the same Bitmap data.
Romain, are there any circumstances under which this would not be
true? I'm maintaining an app where a large number of
OutOfMemoryErrors are occuring in the field, all of them from the same
line of code which is a call to setBackgroundResource(R.id.a-local-
drawable). The implication seems to be that repeat executions of this
line of code result in OutOfMemoryErrors. The stack trace is:
BitmapFactory.java-2):-1:in
`android.graphics.BitmapFactory.nativeDecodeAsset'
BitmapFactory.java:464:in
`android.graphics.BitmapFactory.decodeStream'
BitmapFactory.java:340:in
`android.graphics.BitmapFactory.decodeResourceStream'
Drawable.java:697:in
`android.graphics.drawable.Drawable.createFromResourceStream'
Resources.java:-1:in `android.content.res.Resources.loadDrawable'
Resources.java:580:in `android.content.res.Resources.getDrawable'
View.java:-1:in `android.view.View.setBackgroundResource'
One possible factor that might result in new memory usage is that the
drawable is resized to fit in to the view. In its original form it's
a 9-patch containing a color gradient, with different dimensions from
the view it's loaded into.
Any thoughts about what might be consuming additional memory in these
calls, or how to prevent it?
thanks,
-Harry
>
> --
> Romain Guy
> Android framework engineer
> [email protected]
>
> Note: please don't send private questions to me, as I don't have time
> to provide private support. All such questions should be posted on
> public forums, where I and others can see and answer them
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