为什么我不能强制我的一个视图在软件中渲染？

Question

In a custom view I have, I'm using Canvas.drawBitmap with a source Bitmap that is wider than 2048px. This of course causes problems when Hardware Acceleration is enabled, with the LogCat spewing out "W/OpenGLRenderer(4968): Bitmap too large to be uploaded into a texture" each time drawBitmap is called.

So to work around this I tried calling setLayerType(View.LAYER_TYPE_SOFTWARE, null) on my view. The only problem is that it doesn't seem to help. When I try to run my app, LogCat will still give the warnings, and nothing ends up being drawn.

I cannot understand why is this so. This article on the Android site clearly states:

You can disable hardware acceleration for an individual view at runtime with the following code:

 myView.setLayerType(View.LAYER_TYPE_SOFTWARE, null); 

Is there something I'm doing wrong? Why is Android not respecting the setLayerType call?

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[in case it matters: I'm performing my testing on a Samsung Galaxy Tab 10.1 running Android 3.2]

Answer 1

Try to resize the bitmap first. Use createBitmap.