I want dismissDialog(ID) to be called whenever dialog is gone (disapears, get closed , ...), so it may happen when user press BACK button or any other scenario that may close the dialog.
which one is better approach? to call onCancelListener on dialog? or call OnKeyListener and assign if (keyCode == KeyEvent.KEYCODE_BACK)
// do smth
thanks.
Use onBackPressed(), to do cleanup or whatever you want to do in dismissdialog()
if you do not ant to allow to dialog disappear,when back button pressed.it can be done by setting dialog's property as below:
dialog.setCancelable(false);//here dialog is object of Dialog class which you want to show
Related
I have a timer which runs continously. When I press the BACK button I made a dialog to appear where you can quit from that intent or go back and cointinue the timer what has been stopped by the BACK button. Well if I click on the contimnue, the onResume() method makes the timer continue and it works good. But, if I press the back button when the dialog is on the screen I want the timer to go on just like if I press the Continue on the dialog. But instead, I press the back button and nothing happens, the timer is stopped and it is not good for me since some of my methods only works if the timer is going or it is stopped by the dialog. But if there is no dialog and the timer is stopped numerous potential errors can happen. So how can I stop the user to press the back button when the dialog is on the screen?
I tried something like this:
if ((keycode==back) && a=0 ) {... a=1 , onPuase()} // dialog comes in onPause() just happened
else ((keycode==back) && a=1 ) {... a=0, onResume()} //I want onResume() to happen here
But it is not good. The dialog appears on the first Back button then it disappears on the second Back (nothing happens here). The timer is still stopped here however the third back button starts the timer. So there is an unecessary Back which can cause troubles since the useres wont know that they have to press it again...
A few advices:
Do not call onResume/onPause manually, only system should make it. Else you'll have unexplainable issues on various devices.
You really want to use OnDismissListener ( http://developer.android.com/reference/android/content/DialogInterface.OnDismissListener.html ). As starting from ICS, dialog can be dismissed not only by pressing Back key, but also by tapping somewhere on screen, outside the dialog.
If you want to prevent dismissing the dialog by "back" and "tapping out of dialog" - use setCancellable(false) http://developer.android.com/reference/android/app/Dialog.html#setCancelable(boolean) for the dialog.
Good luck
If you want to be notified when user pressed BACK while your dialog was displayed, use OnDismissListener
implement OnDismissListener in your DialogClass
and override OnDismiss method
#Override
public void onDismiss(DialogInterface dialog) {
super.onDismiss(dialog);
//you can control back button from here
}
I'm trying to have my alert dialog not only close itself when cancelled but also go back to the activity before the one it was called in. Is there a cancel function I can override or is it better to setCancelable(false) and use a KeyListener on the back button?
When using AlertDialog.Builder to create your AlertDialog you can set a OnCancelListener (OnCancelListener docs).
Then in the listener you can call finish() to destroy the activity.
I have Dialog in my activity, what I want is suppose the dialog is open, then on Touch of outside dialog I want to dismiss the dialog, and at the same time, I want to call a function which does some update in my activity.
Initially I used MyDialog.setCanceledOnTouchOutside(true); But these will only dismiss and in my case, at the same time I want to call some functions whenever user click outside of a dialog. So what should I do? I know that if I can extend the Dialog class and override its onTouchEvent method then it will be solved but in my case, my class already extends Activity class and in java, we can't extend more then one class.
So what will be the best solution for that? Please help me to solve this out.
The second answer on this thread shows how to do this (used it myself, works):
How to cancel an Dialog themed like Activity when touched outside the window?
I have a customDialog with input fields. I want possible entries to be removed once the dialog is closed (either via back or when a certain button is pressed), i.e. the state should not be saved.
How can I do that?
If the back button is pressed means that dialog is canceled. Implement DialogInterface.OnCancelListener for your dialog and empty/delete/null the entries you want.
I think you might be getting another problem.
Say that you have shown a dialog which was dismissed. If the same dialog is going to be shown a second time, it won't be rebuilt. It will just be shown again.
This means that if you setup your dialog in the onCreateDialog method, the second time that the dialog is shown, this method isn't invoked! Instead, onPrepareDialog is invoked.
Alternatives? You can call Activity.removeDialog or take care of the setup process in the onPrepareDialog hook.
Friends i have an application with an Activitiy which brings some data from Content Providers and Display it in the textViews and edittext onto the Screen. but before that it prompts me for the username and password in a dialog. i have done all the getting content Providers Stuff in the positiveButton onClick Listener of the Alert Dialog.
It works fine but problem is that if i dont enter username and just press bakc key button it closses down the Dialog Box and the Back Screen is showed without loading the content providers.
Note: I have put my code of alert dialog in the onCreate Function of that activity.
So can u guide me how should i do it that when i press back key on dialog box it also should not display my activity.
Please Help!
your dialog name here.setCancelable(false);
this is working
I would honestly just do:
mDialog.setCancelable(false); //assuming the field mDialog is your Dialog
Then make sure you have both an Okay and Cancel (Positive and Negative) buttons on your Dialog. This way, the back press will do nothing, and you can use the Cancel button to finish your activity as well if desired.
The Dialog interface provides a setCancelable() method which enables precisely this. You call that with a false value and the user won't be able to press the back button to go back to your activity.
You can use method of each activity is : onBackPressed()
http://developer.android.com/reference/android/app/Activity.html
-This is the method which you can override sub method to execute when user enter back key.