问题
Android 4.4 Kit Kat introduced the ImageReader class for accessing the image in the Surface, useful for real-time processing of a camera preview. However, I can't figure out how to link it to the Surface or use it. Anybody have any insights or short example code?
回答1:
You can find an example in the camera CTS tests.
As noted in the comments, ImageReader isn't actually usable until 5.0 ("Lollipop").
来源：https://stackoverflow.com/questions/21147519/how-to-use-the-imagereader-that-appeared-in-android-4-4