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So my login Activity is the first screen you see. When you hit the back button, it exits the app, good. So I open up the app again. After logging in, I am now in my main Activity. How do I make it so when I hit the back button now, it exits the app rather than going back to the login Activity? When you push the new activity, call finish() on the previous, otherwise it will remain on the stack, therefore appearing when you hit back and pop the current activity. Hope that helps. try this one @Override public void onBackPressed() { super.onBackPressed(); finish(); } 来源： https://stackoverflow.com

I have a UINavigationBar that intercepts the back button tap that alerts the user if there are unsave changes. This is based on the solution presented in UINavigationController and UINavigationBarDelegate.ShouldPopItem() with MonoTouch using the UINavigationBarDelegate protocol and implementing - (BOOL)navigationBar:(UINavigationBar *)navigationBar shouldPopItem:(UINavigationItem *)item; Now, iOS7 has introduced the swipe-to-go-back gesture, and I'd like to intercept that as well, but can't get it to work with the solutions I've found so far, namely using [self.interactivePopGestureRecognizer

I have an iframe in my web page. I modify the src property via javascript like so: document.getElementById('myiframe').src = 'http://vimeo.com/videoid1'; document.getElementById('myiframe').src = 'http://vimeo.com/videoid2'; document.getElementById('myiframe').src = 'http://vimeo.com/videoid3'; However, everytime I do this, it's logged into the browser's history. So everytime I press back in the browser window, the iframe content goes from videoid3 to videoid2 to videoid1. If I press back again, the entire page goes back. I would like to modify the iframe src with javascript WITHOUT logging an

I know that services cannot implement Back key press and I understand the rationale. But there is an app called SideBar (on Play Store) that reacts to back key presses. It is a service that adds a view as system overlay and removes the view when the back key is pressed. Can anybody explain how this is done? Here is another app that does it well. I have scoured the web, but have not found a solution to this problem. Any ideas? It is probably done using system alert windows - so the service creates and manages a window that is added to the window manager, which has a custom callback set on it.

i'm trying to make a phone call from the app and I want it to return back to the app after the call i asked that question in this forum but i didn't understand the answer How to make a phone call in android and come back to my activity when the call is done? public void call() { try { Intent callIntent = new Intent(Intent.ACTION_CALL); callIntent.setData(Uri.parse("tel:048598077")); getContext().startActivity(callIntent); } catch (ActivityNotFoundException activityException) { Log.e("dialing-example", "Call failed", activityException);} finally { EndCallListener callListener = new