I use an async task to upload an image and get some results. While uploading the image I see a progress dialog, written in onPreExecute() method like this: protected void onPreExecute() { uploadingDialog = new ProgressDialog(MyActivity.this); uploadingDialog.setMessage(“uploading”); uploadingDialog.setCancelable(true); uploadingDialog.show(); } Ok when I press the back button, obviously the dialog disappears because of the setCancelable(true). … Read more
I want to check if there are more than one screens are on stack when device back button is hit. If yes, I want to show previous screen and if no, I want to exit app. I have checked number of examples but those use BackAndroid and Navigator. But both of them are deprecated. BackHandler … Read more
When i press a button in my app, I need to return to the last activity. Any ideas? Answer Calling finish() from the activity you want to end should take care of this. Edit many years later: This still works, but it’s a bit of a heavy-handed approach. When I originally posted this, Fragments didn’t … Read more
I am trying to prevent an AlertDialog box from closing when pressing the back button in Android. I have followed both of the popular methods in this thread, and with System.out.println I can see that in both cases the code executes. However, the back button still closes the dialog box. What could I be doing … Read more
I have pushed a view onto the navigation controller and when I press the back button it goes to the previous view automatically. I want to do a few things when back button is pressed before popping the view off the stack. Which is the back button callback function? Answer William Jockusch’s answer solve this … Read more
I am developing an application that when the button is pressed, it opens a dialog with OK and Cancel buttons. It works fine. When the user presses the back button, I am handling this as follows public boolean onKeyDown(int keyCode, KeyEvent event) { if ((keyCode == KeyEvent.KEYCODE_BACK)) { } return super.onKeyDown(keyCode, event); } But the … Read more
The title of this question kind of explains my question. How do I redirect the PHP page visitor back to their previous page with the header( “Location: URL of previous page” ); Answer try: header(‘Location: ‘ . $_SERVER[‘HTTP_REFERER’]); Note that this may not work with secure pages (HTTPS) and it’s a pretty bad idea overall … Read more
In normal text editors [with all due respect to Vim] there is a shortcut Ctrl+Z when you have done something nasty and want to return to the previous version of the text. Like BACK button in Word. I wonder how can you achieve this behaviour in Vim. Answer You can use the u button to … Read more
When the BACK button is pressed on the phone, I want to prevent a specific activity from returning to its previous one. Specifically, I have login and sign up screens, both start a new activity called HomeScreen when successful login/signup occurs. Once HomeScreen is started, I want to prevent the users from being able to … Read more
On pressing the back button, I’d like my application to go into the stopped state, rather than the destroyed state. In the Android docs it states: …not all activities have the behavior that they are destroyed when BACK is pressed. When the user starts playing music in the Music application and then presses BACK, the … Read more
