Android :: Service Stops When Activity Is Closed
Nov 23, 2010
If I understand it correctly, bindService() with BIND_AUTO_CREATE will start a service and will not die until all bindings are all unbinded.
But if I bindService(BIND_AUTO_CREATE) at onCreate() and hit back button to close the activity, the service calls onDestroy() and dies also.
I don't call unbind() at anytime. So is that mean when the Activity got destroyed, the binding got destroyed also and the service gets destroyed also?
What if I want the service to be always running, at the same time when the activity starts I want to bind it so that I can access the service?
If I call StartService() and then bindService() at onCreate(), it will restart the service at every launch of Activity. (Which I don't want).
So I could I start service once and then bind next time I launch the activity?
View 1 Replies
Nov 19, 2010
I wrote an android program that: has a main activity for UI, and it starts a service. The service timely callbacks the UI activity to update views. It works fine except: if the activity is closed (with BACK) and start again, the service will also be started again (The service plays audio file, so there are two overlapped sounds). I use bindService with BIND_AUTO_CREATE flag to start and connect to service. According to the document, it should create service only if it doesn't exist, but obviously it starts another instance when opened second time. All I want is when the activity is closed, the service goes on running, and when the activity opens again, it can reconnect to the service. Is that possible? Or I just misunderstand the usage of service?
View 1 Replies
View Related
May 20, 2010
In the following scenario, the fields of Activity is not released when the Activity is closed with calling finish().
Class MyClass {
}
View 3 Replies
View Related
Oct 8, 2010
I have a widget that launches an activity, but when the activity finishes using the finish() I don't know how my widget can know about it since I can't override onActivityResult() which seems like the only way to listen when an activity closes...?
View 2 Replies
View Related
Apr 28, 2014
How to check in android when application (not Activity) going to closed?
View 2 Replies
View Related
Nov 9, 2010
I have an application which starts a service. The service has a timer and pops a notification every 30 seconds. I notice the following behavior: if the screen is on the notifications are shown ok (even if the app is in background). if the screen is off (by power button or by itself) the notifications won't show. if the screen is off but I have the debugging running the notifications appear. How can I make the service run with the screen off. (The actual app only checks if a notification should be checked every 30 seconds, but for testing purposes, the above scenario is ok)
View 2 Replies
View Related
May 23, 2009
I'm trying to log the phone's cell movement. So I created a PhoneStateListener that is being called when the CellLocation has been changed. Then it informs a logging service to write that new cell information to a log file.
This works as long as the screen is on. But when the screen goes off, the logging stops.
I have two classes:
The PhoneStateListener gets loaded on boot time public class CellStateListener extends PhoneStateListener { public void onCellLocationChanged(CellLocation location) {...this is the logging service which is informed when the cell location changes listener.onCellChanged(mcc, mnc, lac, cid); ... }
View 3 Replies
View Related
Mar 9, 2010
I have a main application, that at some point spawns a service that checks for updates, if it finds any, it posts a notification with the ink to the update, and then the update service stops. Through the debugger I've noticed that the notification pops up but then disappears once my service is stopped, which I guess makes sense since the Notification object was instantiated within that service. What would be the best practice of keeping that notice available until the user clicks it?
1) somehow attaching the notification to my top service - which might get really ugly --> since that update service is spawned by another sub-service that is spawned by a broadcast receiver... so even if i wanted to somehow pass the object of my top level service it would mess the entire abstraction of my app structure and would force me to keep pointers to it through every event and service that I use... Perhaps there is some other way to get that service through the app's context? or any other alternative?
2) Finding a way to keep my update-service alive until the user presses the notification, but I'm not sure if there is any intent broadcasted that I could listen to...
View 2 Replies
View Related
Nov 6, 2010
I've a problem with my android application.
I'm using a background service (with notification on the status bar) which performs an audio sample every hour. To perform this sample I generate a broadcast event every hour and when I capture the event the audio recording starts. During the day, when I'm using the phone, I've no problems. The strange behavior happens during night, when it seems like if the phone goes to an "idle" state: the broadcast events are no more processed. From the log file I understood that the events are generated and putted in a queue... and when I start using again the phone, all those events are raised in the same moment.
Do u have any idea about how to solve this problem? How can I force the phone to continue processing my events? do I have to set any variable of flag to avoid the phone going in this kind of "idle" state?
View 1 Replies
View Related
Jul 27, 2010
I'm the author of SystemPanel, which includes task management (killing) features. I've recently noticed a problem with my Droid X where it suddenly will stop accepting a charge. For example, the screenshot below shows that the phone plugged in overnight, yet battery continues to drain: With a bit of testing, it appears that killing the app "usb" results in this behavior occurring. Once it has been killed, the phone will never accept a charge until it the phone is rebooted.
I would greatly appreciate if a fellow Droid X owner could verify this for me. To do this, use SystemPanel (Lite version will work fine, as will ANY task killer, or the OS' own task killer) to terminate the "usb" program. The full name of the process is "com.motorola.usb". Any task manager should also reproduce the behavior if you perform a "end all" or "kill all" operation. Then unplug the device from USB/AC power (if it was plugged in) and then reconnect it. You should see no indication of a USB connection and/or charging if your device suffers the same problem. The issue can then be corrected by rebooting the phone. Here is the process as shown by SystemPanel: It appears that Motorola has incorrectly allowed this process to be user-killable and/or has failed to automatically restart it in the event that it terminates or otherwise fails. Would greatly appreciate feedback on this problem, if this is not unique to my device, I'll be modifying SytemPanel immediately to avoid ever killing this process.
View 10 Replies
View Related
Jul 22, 2010
I have a listview. Whenever I strike an item of listview the debugger gets opened instead of starting a new activity (i.e. what I want). Code...
P.S. all the xml files are correct.
View 3 Replies
View Related
Oct 28, 2012
I have 2 activity...suppose i name it activity A and activity B.When the application starts it shows activity A.Then after 5 seconds,it automatically switch to activity B.Activity B contains a listview and checkboxes with each item of listview.If user checks something then he press back button and returns to activity 1 page.All these works correctly.
Now my problem is,activity A has a button to go again activity B page.When user press this button i want to start activity B from where it stops..that means the user will see what items he had checked earlier.Is it possible to view the activity B page from where it stops?
View 1 Replies
View Related
Aug 2, 2010
Whenever the memory needs to be reclaimed, the process is being killed by Activity Manager Service in killPidsForProcess. I have a back button in my activity window on right corner of the title bar.
I want to kill the activity completely on clicking the close button. Can I reuse the same function and will it have any major effect? Please help me out in this.
View 3 Replies
View Related
Sep 10, 2010
I need to made an activity (without layout) that on start check if a service is running. if it is true it starts Activity2, if it false it starts Activity1.
I tried with this code:
CODE:............
Enter code here
But when I check, in the onCreate method, if serviceConnect!=null I receive sometime a NullPointerExcption.
I tried also to insert the operation in the method onCreate in an Async Task:
CODE:............
View 2 Replies
View Related
Feb 17, 2010
Suppose I have an Activity that's a list. It calls a Service when this Activity starts.The Service will do background stuff download, parse, and fill the list.My question is this: How can the Service communicate with the Activity?How can I call a method in the Activity, from the Service? (I'm new to OOP)
View 2 Replies
View Related
Jun 12, 2010
In Virgil Dobjanschi's talk, "Developing Android REST client applications" (link here), he said a few things that took me by surprise. Including:
Don't run http queries in threads spawned by your activities. Instead, communicate with a service to do them, and store the information in a ContentProvider.
Use a ContentObserver to be notified of changes.
Always perform long running tasks in a Service, never in your Activity.
Stop your Service when you're done with it.
I understand that he was talking about a REST API, but I'm trying to make it fit with some other ideas I've had for apps. One of APIs I've been using uses long-polling for their chat interface. There is a loop http queries, most of which will time out. This means that, as long as the app hasn't been killed by the OS, or the user hasn't specifically turned off the chat feature, I'll never be done with the Service, and it will stay open forever. This seems less than optimal.
Long question short:
For a chat application that uses long polling to simulate push and immediate response, is it still best practice to use a Service to perform the HTTP queries, and store the information in a ContentProvider?
View 1 Replies
View Related
Jan 13, 2010
Our application will expose a Service that can be called by Activities in other people's applications.In many cases, the parent applications calling Activity may be paused before our Service completes. I am looking for the best way for a Service to communicate back to the calling Activity that may have been paused.These are the known options:
(1) Require calling Activities to have a registerReceiver() with a custom action and broadcast to that from our Service. The only way to secure this registerReceiver() is with a signature-based permission.As our Service communicates with any number of unknown 3rd party apps,we can't sign our Service's parent app with all these unknown certificates. These apps would therefore be exposing an unsecured registerReceiver() on their Activity. Would ideally like to avoid requiring this.
(2) Create a PendingIntent to send results back to the activity and give it to our Service. Our Service would send data to calling Activity's onActivityResult(). Each time the result is delivered, the calling Activity will go through onPause() and onResume() but this should be OK.
(3) The calling Activities could create a Handler. The Activity would then create a Messenger pointing to that Handler and send it to our service. Our Service can then use the Messenger to deliver our message back to the calling Activity.
View 2 Replies
View Related
Sep 3, 2010
I have a launcher activity which gets activated everytime i start the application and a service which complements it. Now as i press the return key from my main activity .Its Ondestroy gets called.Now i have nullify the pointer of the my launcher activity there. now i am listening through the service any event happening on the network after closing the launcher activity thread and if any event occurs i have to relaunch my launcher activity. i have tried intent but doesnot seems to get though it .
View 4 Replies
View Related
Oct 6, 2010
I have a service (input method) and from within that service I want to start and activity which was declared in the same manifest. The activity maybe running but in the background.
How do i check its presence and bring it to front, or optionally start this.
From what I can gather from other posts, this is about what I need to do:
CODE:..............
I don't knwo which of thest flags pertain to what I need to do. The docs are quite merky, and my random attempt at making this work failed.
View 4 Replies
View Related
Oct 16, 2009
My application has a background process which continuously waits on a socket for receiving messages and it should be started only once and at the time of application starting.Thus i want to do that background job in a service.
The service should not be started from the activity ,it should be started at the application starting.
How can i define the service,which will be started at the time of application starting?
If at all the service is started from activity.The activity can be destroyed and restarted.when this happens the service also be restarted .
View 7 Replies
View Related
Jun 14, 2010
How can I start a service from an Activity ?
View 4 Replies
View Related
Feb 25, 2010
In my app i have an activity from which i want to start an Service.
View 3 Replies
View Related
Aug 11, 2010
Is it possible to start an Activity from a Service? If yes, how can we achieve this?
View 1 Replies
View Related
Nov 19, 2010
i am writing an app in which i need a background service to call an activity and show some result.
View 4 Replies
View Related
Dec 16, 2009
I am working on an android application, where the activity binds to a local service to perform certain tasks.Now I am binding the service in the OnCreate method of the Activity, after which the activity has to use the service object to invoke the functionality defined in the servicein the OnStart method. The problem here is that once a call "bindservice" has been made, we might not get the serviceobject immediately, so my service object would be null till that time. So i cannot invoke the service functions.So is there a way to determine in the activity that the service has been bound and the service object is valid and could be used now. For reference i'm attaching a code snippet for the same.
View 2 Replies
View Related
Mar 13, 2010
Can an Activity be bound to two different Services at the same time or do I have to unbind one Service before binding to the other one?
View 2 Replies
View Related
May 6, 2010
I want to stop an Activity that is in some other application from my Applications service. Is there any mechanism to do so?
View 6 Replies
View Related
Aug 8, 2010
Is it possible to close/finish activities in activity stack from a backgorund service.
View 2 Replies
View Related
Jun 10, 2010
I have a service running in the background. It starts on device boot. Also, I have one activity (that appears in the task launcher) in which I have provided buttons to start and stop the service.
Now, I install the application on the phone and I start the service using this activity (and not on-device boot). As expected the service starts and starts doing its designated task. I no-longer need the activity. So it goes out of sight and may not be required for a long time now.
My question is, now, if the android platform kills this activity, will it kill my service too ? (This is because I see that after few hours, my service is not running anymore.). If this is true, then will the service continue running longer if the service was started on device boot.
View 11 Replies
View Related
Feb 16, 2010
Activity 1 starts a Service, using the standard Intent. Activity 1 starts Activity 2. Then, Activity 1 gets finished().
Now, there's only Activity 2.
How does Activity 2 kill the Service, since that Intent was generated in Activity 1? I don't want to pass the Intent everywhere...
View 2 Replies
View Related
