问题
I'm an absolute Android noob, and I want to create an app where I can filter the camera preview in real-time by manipulating the raw YUV420 data. In API level 8, the setPreviewCallbackWithBuffer appeared and my question is:
In API level 7, data supplied to onPreviewFrame couldn't be changed (i.e. changes to data didn't result in any change of the preview, which is as it should be I guess). Is this also true for setPreviewCallbackWithBuffer ??
Edit: I found this article Image processing with Android Camera which has code for doing pretty much what I want anyway (not bearing in mind my original question...)
来源：https://stackoverflow.com/questions/6814572/android-camera-preview-filtering