Swipe Up/Down to Close Fullscreen Image

[eugenkiss]

From a reviewer:

Also, pinch to close it's useless on one-hand mode, that's why I suggested swipe up/down to close full screen.

[mitchross]

where is the pinch logic located?

[eugenkiss]

The pinch to close logic is located at the end of MediaView.java:

chanobol/src/main/java/anabolicandroids/chanobol/ui/media/MediaView.java

Line 287 in 49e11f0

attacher.setOnMatrixChangeListener(new PhotoViewAttacher.OnMatrixChangedListener() {

Both the OnMatrixChangeListener as well as the code inside dispatchTouchEvent interact to achieve the desired effect.

[tclemente]

So I think this might be able to be implemented by this library, but I'm not exactly sure of how to do it with your existing code
https://github.com/liuguangqiang/SwipeBack

[eugenkiss]

I guess one could put a gesturedetector on some view that is on top of imageview and listen for certain swipe gestures. This approach is probably easier than using another library because of the interaction with the viewpager. A conceptually better approach is to extend the photoattacher class with the desired functionality.