高效检索缩放后的资产位图

Question

I've got a GridView of many images which are retrieved from the assets folder and decoded from streams. These are typically quite large (to be used elsewhere in the app), but for the GridView need to only be 140dp wide or have a minimum height of 150dp. Which of the options in BitmapFactory.Options should I use to scale the image to this density/resolution? I'm confused by the many different density options.

Answer 1

For fast retrieval, you should use inSampleSize . It automatically loads a smaller bitmap without first loading the full image into memory.