How to implement zoom effect for image view in android?

Question

I have to implement image zooming, I have tried with so many codes.But i didnt get full idea of gesture events. I want to implement when we apply double tap, image will be z

Answer 1

I prefered the library davemorrissey/subsampling-scale-image-view over chrisbanes/PhotoView (answer of star18bit)

• Both are active projects (both have some commits in 2015)
• Both have a Demo on the PlayStore
• subsampling-scale-image-view supports large images (above 1080p) without memory exception due to sub sampling, which PhotoView doesn't support
• subsampling-scale-image-view seems to have larger API and better documentation

See How to convert AAR to JAR, if you like to use subsampling-scale-image-view with Eclipse/ADT