activity-lifecycle Questions

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My app contains a MainActivity and uses full screen fragments to display content. I'm trying to achieve the following during app re-creation (When the app has been in background for a long time, ge...

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I am confused about super() function call in overriden functions. @Override protected void onDestroy() { // TODO Auto-generated method stub super.onDestroy(); } @Override protected void onPause...

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SaveInstanceState For data like Integer, Long, String and else are fine, I just put it in the bundle and get it back once the onCreateView gets called again. But my fragment also has listener like...
Oriole asked 10/1, 2014 at 11:27

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More concretely: Is it safe to place the canceling of a task in onDestroy? Also, is it safe to use onDestroy for unregistering receivers and freeing up resources? My aim is to make sure that my ta...

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I have come across a requirement but I am not able to get the correct way of implementation and hence need your help. What I want to do? - I want to perform an action depending upon notification I...

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I'm learning Android programming for a class, and I have a quick question about how finish() fits into the Activity lifecycle. When you make a call to finish(), what lifecycle callback is started?...
Biedermeier asked 29/9, 2012 at 19:44

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I have tried to research exactly when the onDestroy method is called for an activity, but I've read some confusing and conflicting information. In general, my question is: under what circumstances ...
Hermaphroditism asked 30/3, 2015 at 20:5

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I m making adapter to adapt my book collection to be visible in list view. Issue is solved if I add super(context, position): public BookAdapter(Context context, int position, List <Book&gt...
Penitential asked 29/3, 2015 at 19:21

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I am wondering what the proper order goes when a user returns to an Activity from the Home Screen. Will the Activity's onResume() execute first, and then the Fragment's onResume() execute after? D...

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My app is composed of a single Activity. In this activity, I'm creating multiple HandlerThreads which run in a loop to do socket blocking operations. Currently I post a quit message to everyone of...
Thrift asked 18/2, 2013 at 8:42

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I'm trying to implement time out notification. Here is what I want to do. If app goes to the background mood, after 5 minutes it should warn the user that app will be signed out. After this notific...
Dworman asked 1/10, 2014 at 13:13

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When the battery on my Android device dies what methods in the Activity and Fragment classes (if any) are called during the "Powering Off" stage of the device? Also, if a user is currently looking...

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Once I finish the activity,the method of onPause() excute immediately.but the method of onstop() coming with delay.Just about after 10 sec,the onstop() can be excute. why and how can I solve it? ...
Caritacaritas asked 5/1, 2015 at 10:0

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App killed from Recently open application list by swipe. In my application, I am running service in background only when application is available in foreground or in background. If user has sent ...
Reparative asked 11/6, 2014 at 12:56

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My activity's onResume() reads off some "extras" data from the Intent that started it and updates the UI accordingly. I'd like to add error handling: if the data in the Intent is missing/corrupted...
Frowst asked 10/5, 2011 at 15:17

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In the Android Application class you can register/unregister ActivityLifecycleCallbacks, which allow you to monitor Activity lifecycle events in your application all in one place (if you so desire)...
Wiseman asked 25/7, 2013 at 17:47

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Ordinarily, exiting my application by calling: android.os.Process.killProcess(android.os.Process.myPid()); performs well without incident. But every once in a while, the application will restar...

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I know, this question is asked before on stackoverflow, but non of the answers worked for me. Probably worth mentioning: I use ActionBarSherlock with the support package. Method onSaveInstanc...
Goodale asked 28/3, 2013 at 16:20

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I have a activity which is called from a AlarmManager. It is an alarm message. When the Activity is called from the Key Guard, the lifecycle goes from onCreate -> onStart -> onResume -> onPause ->...
Decennium asked 26/11, 2012 at 19:42

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I am using Otto Event bus to subscribe to certain events in a ListFragment. The bus instance is stored and created in an subclass of Application, in other words, it bus should work as a singleton. ...

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The scenario is: launch app, start activity A, navigate to B, then to C press home button. C gets destroyed. Bring up task manager, press on my app's icon. Activity C is being recreated. How can I...
Concrescence asked 23/9, 2012 at 0:45

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I have an Android application which makes requests to my webserver via both a WebView and an HttpClient. I sync cookies between the two using a CookieSyncManager. So far, so good. When my applica...
Bosco asked 11/6, 2013 at 19:10

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I have a custom component which extends LinearLayout, I need to execute certain statements when Layout is destroyed or removed. (or about to be removed) One way is to check for onPause() or onDest...
Hamann asked 25/1, 2012 at 10:44

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This issue is only occurring on two older Samsung Galaxy models, but is nevertheless very reproducable. I have a simple app that displays a photo that is taken through the device's camera app. It ...

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Am using AsyncTask in order to download images within my activity the flow goes like this: protected void onPreExecute() { \\begin animation } protected IUpiResponse doInBackground(String... p...
Terwilliger asked 3/1, 2013 at 12:38

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