Open Url in browser on button click

You haven't mentioned what the target platform is. I'm assu$$anonymous$$g you're on mobile, because PC and $$anonymous$$ac deployments unfocusing the Unity app won't pause the game at all by default when you goto another app.

Depending on the platform you are using, you just go back to the game. Both iOS and Android will resume the game state when you go back to it, provided the memory hasn't needed to be reclaimed.

Think about what you're asking though. You want a button on a website to give an instruction to a native API. This, by design, is not allowed on either iOS or Android as it would compromise the security of the device.

Long story short, it isn't difficult; its impossible. All you can do is go 'back' to the application. On iOS this means double-tapping the home button and picking the app out of the task list. On Android that means either hitting the back button or holding the home button and selecting.

I am building for android and iphone .It's basically an Augmented Reality app so it is very important to go back to the current state of the application .can you suggest some methods without the last one which is some what difficult for users if they dont know how to use.

I think your third 3rd answer.can you please tell the steps or procedure for native API .or any example in this regard..

Thanks