Android : How To Detect Launch Of An App In Droid From A Background Service?
Mar 3, 2010
I want to create an app or background service that just listens for the launch of a 'default' app, say Contacts or the built-in Gmail app. If the contact app is clicked, I want to transfer control to my app temporarily (e.g. present a Yes/No popup to the user or increment an internal counter of my app ) and then redirect the user back to the app that was clicked. I want to do this only for a couple of 'well-known' built-in default apps, not any third party apps..
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May 16, 2010
I'm using Wikitude API 1.1 as an AR viewer in my application. The problem with Wikitude, if I haven't launched the actual Wikitude application since the phone's bootup, I will get a NullPointerException everytime I start my own application.
So I figure if I can start my app first and them check if Wikitude is installed and or running. If it's not installed, go to market n download. If it's not running, then we should run it straight to background so that my app doesn't loose its focuscode...
The part I block commented is the intent to start Wikitude. But I always failed in restricting Wikitude to background. Any help?
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May 30, 2010
I need to run a service each night at midnight. I would like to use the AlarmManager to do this. Can you give me some guidance of how to make it work correctly?
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Nov 24, 2010
I need to launch a service running in the background,that should record what's on the current screen for say about 10 sec.. i should able to save it in a file or on any storage device and later i should able to retrieve it also..
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May 22, 2010
How to detect application launch and shutdown events?
I have used BroadcastReceiver for detecting incoming message, outgoing call and so on. but now I want to use Application Launch and its Shut Down event from my application..
Kindly waiting for any suggestion/link/source code....
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Apr 27, 2010
How to find what service running on background on Android? Maybe I have to ask in another way? Does the service be presented as one "process", then we can use "ps" or "top" command to find it?
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Aug 21, 2009
I have an android main activity which starts a service (class extending service).
The services onStart creates a Mediaplayer and starts playing an mp3 file.
Then when you click something in my main layout (from the main activity), I call startActivity to fire another screen. I would assume my music background service keeps running, however it finishes. How can I achieve my goal then? code...
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Oct 8, 2010
Is it possible to write a background service in android which is undetectable ? it should not me present is app manager also.
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Aug 5, 2010
I need a way for my Activity to known that it's going into the background, and not when it's getting killed. I thought about hooking at onStop(), but onStop() is called for both cases. In other words, is there a way to tell if when my Activity is moving into the background and not getting killed?
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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?
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Aug 6, 2009
It would appear on a G1 (with the latest software update) that onUpdate () runs even when the widget is not visible. Is there a way of sensing that the widget is or is not visible or is otherwise in foreground? That is, running the code below shows a logcat message at whatever interval the Widget is scheduled to update, whether it's in foreground or not, whether even the screen is dim or otherwise in deep sleep. It would seem onUpdate should only be scheduled to run when the Widget is in the foreground or visible. Is this a defect in the G1, or is there some other API call to detect if the Widget is visible?
public class HomeScreenWidget extends AppWidgetProvider { ...
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Jul 19, 2010
Is there any way to launch an activity w/ Intents (in this case the Browser) in the background, and then bring it to the foreground using a service or activity?
I know it's possible to bring apps to the foreground by launching an intent with FLAG_ACTIVITY_BROUGHT_TO_FRONT
But is it possible to initially launch the activity in the background?
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Jun 25, 2010
I have small simple Service and big MainActivity with UI. Service is called periodically from AlarmManager. My Service need to know if MainActivity is on the screen and inform MainActivity about state changing.
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Oct 22, 2009
i have a service (that extends Service). public class MyService extends Service ..
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Jul 23, 2010
The official documentation describes tasks as follows: All the activities in a task move together as a unit. The entire task (the entire activity stack) can be brought to the foreground or sent to the background. Suppose, for instance, that the current task has four activities in its stack three under the current activity. The user presses the HOME key, goes to the application launcher, and selects a new application (actually, a new task). The current task goes into the background and the root activity for the new task is displayed. Then, after a short period, the user goes back to the home screen and again selects the previous application (the previous task). That task, with all four activities in the stack, comes forward. Is there a way to programmatically detect when the task of the current Activity moves into and out of the background? I would like to know when the user has switched switched to another application, vs. when the user navigated to another Activity in the current app.
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Jul 22, 2009
I have a need to create a background service that starts up during the system boot up, and keeps running until the device is powered down. There is no UI or Activity associated with this. I created a class extending the android Service class, and added the setttings to the AndroidManifest.xml file. When I launch this service in the emulator, I don't see this launched at all. I have overrided almost all the methods in the Service class to put log statements, but none of them shows up.
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Jul 13, 2010
i'd like to Launch an Activity Form a Service. I know that this is not best practice for android however i am creating an application that is just a service and the first time it runs the user needs to accept some terms and conditions (this is the activity i need to launch). Can any one help me some code to do this? Is it possible?
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Aug 3, 2010
Can I get the detailed description of how to launch application from web link or A trusted link where I can get the steps to do the same..
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Jun 18, 2010
Android Market has a neat feature allowing you to launch it using a url in the format of market:// ... Is there an equivalent method for launching an application using a link?
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Jun 7, 2010
Leading up to my purchase of the new EVO I familiarized myself with some battery-life-saving tips. One of the tips was associated with reducing the number of Widgets on the Home Screen(s) that are pulling data in the background.
QUESTION: if one doesn't use widgets but uses App icons and Shortcuts does the addition of those NON-widget items cause the associated apps to launch by themselves in the background MORE THAN if they were NOT "short-cutted" onto the Home Screen pages??
I'm trying to determine how/what I'm doing that might cause apps to launch in the background when I don't really want them to. I'm using Advanced Task Killer to see what is running in the background and have NO CLUE why some stuff is turning on when they do. A recent LARGE list of running apps that I did NOT turn on coincidentally coincided with some Home Screen short-cut non-widget add-ons I recently placed.
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Jul 14, 2010
I have gone through many threads in this group about avoiding the use of everlasting Services, Timer/TimerTask sleep issues and detecting phone calls, but not finding the answers I am looking for this app, I will really appreciate any help you can provide me. I am working on an App to detect incoming calls and when the call time is equal to 5 minutes indicate the user by vibrating the phone. In my strategy I am creating a Receiver that listens for RECEIVE_BOOT_COMPLETED action and launch an everlasting Service which sets up a PhoneState Listener.
1) Is there any other strategy to be always listening for incoming calls and thus avoide to using an on boot created Service? (besides the Service eventually gets killed and I am not able to detect incoming calls) A first approach I took here was setting up a Timer and TimerTask when CALL_STATE_RINGING state was detected and after 5 min (if the call continues) vibrate the phone for 2 seconds. However sometimes the timer phone vibrates after an hour a call was placed (the vibration happens in the run() TimerTask method. I know Android can go to sleep and that could be the reason my timer is not run on time but 2) How can Android be slept if I am in a call? Is the call just handled by the modem or how come? Next, to overcome this issue I tried preventing the Service from going to sleep by putting it in foreground state calling startForeground (NOTIFICATION_ID , notification), still the same behaviour the timer is run long after the call was placed 3) does startForeground prevent Android going to sleep or it is just aimed to keep the Service's process in memory? 4) A wake lock would do this job ? (I have not tried this) Encouraged by many post I tried using an Alarm and it works (thought I do not want to use it because I think it should be possible to accomplish with something lighter) but when the phone vibrates it just keeps vibrating till I remove the phone from my cheek (the screen is turned on again) 5) Why? Is it that Android started vibrating the phone and then went to sleep? so the vibration is turned off when Android awakes, when the screen is turned on again? 6? Ideas of how to stop the timer?
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Mar 30, 2009
How do you pass an intent from a service to a new activity launched from a main activity? There's a passextra( intent src ); but I don't think thats what I am looking for?
activity main > start service( intent wuteverserviceintent );
activity main > start activity( intent newactivityintent );
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Mar 12, 2013
I'm coding a service which does a its job once in every 10 minutes. Works fine. However, when a screen lock gets activated, the service is stopped (which is normal I've found out and I'm find with that). But when the screeen is unlocked again, the 10-minute interval could be already over and I want the service to do the job immediatelly. But... how can I detect that the service was awaken? I schedule the tasks with handler.postAtTime() method.
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Apr 2, 2010
I am in the process of creating an app that is similar to the build-in SMS app. What I have tried: - running a regular service which worked just fine until android kills the service - using the AlarmManager the make the 5 min. interval call to a service. But I was not able to make this work.
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Jul 15, 2009
I'm trying to develop a service, which needs to be run in background as a low priority task and does some complex processing . I need to gracefully quit my service when their is a resource shortage( like CPU running low on memory). Was there any APIs available to know the CPU resource usage, Objectives of my service is to - 1. Exit service when a high priority application(s) is running and which might need entire CPU resources. 2. Should store my states before onDestroy() of my service is called.
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Sep 15, 2010
it is possible in android to show pop-up dialog from background running service?
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Sep 9, 2009
It seems trivial to use GPS in a background service, but how can you do the same with the accelerometer? Everything I've tried seems to require a context, but a background service doesn't have a context?
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Apr 22, 2010
I like to check my service status, e.g. live or be killed. so, I hope there is a command like "ps -ef " of linux.
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Nov 24, 2009
I wish to use implement Service in my application to display a message on the screen. This service should run while my application is running. But right now, i just want to test the service function and the Service doesn't seem to work well. In the main java file, i call startService(new Intent (this,testing.class)).
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Nov 2, 2010
An activity can use AsyncTask or Handler framework for background work. Both will continue to work even after user has moved away from the activity that started them and the onDestroy for the activity has been called. In other words, an activity is fully capable of doing background work even after its GUI has been shutdown.In this scenario, use of Service for background work seems like redundancy. What does Service bring to the table that an activity can not do?
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