Im trying to show a camera preview to the user of arbitrary size. What I'd like to do is pick an appropriate camera size based on the size of the preview, then effectively do a center-crop of the camera output into this (ie maintain aspect-ratio of the camera preview). As far as i can tell, the camera by default stretches the camera onto the surface view so i need to make the surface view have the same aspect as the chosen camera size and then use another view to crop this.
I've had some success by adapting the code from the (rather complicated) android Camera app. (from here) https://android.googlesource.com/platform/packages/apps/Camera.git/+/master I noticed that the app uses two modes of operation depending on whether surface textures are available. I didn't want to get into manually drawing onto canvases as that seems overkill for this so I essentially tried to take the surfaceholder implementation and flip the equality test in "PreviewFrameLayout" like so: if (longSide < shortSide * mAspectRatio) Right now i have the correct behaviour in a small preview, but if i try to make it the start of the screen the application seems to just quit (i think drawing off the screen causes an issue). SO I'm basically back at square 1 and I've been working at this for so long i figure i must just be doing something wrong. can anyone tell me what im doing wrong or if this is even possible? It feels like there is some fundamental limitation preventing me from having one view crop another... -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en --- You received this message because you are subscribed to the Google Groups "Android Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to android-developers+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
