问题：
java.lang.IllegalStateException: Can't compress a recycled bitmap
解决：
View drawingView = get_your_view_for_render;
drawingView.buildDrawingCache(true);
Bitmap bitmap = drawingView.getDrawingCache(true).copy(Config.RGB_565, false);
drawingView.destroyDrawingCache();
// bitmap is now OK for you to use without recycling errors.
