Android :: Activity Check Service To Start Another Activity
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:............
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Aug 19, 2010
I have an app that starts a service, then starts another activity previously selected by the user. Everything works on my app except I'm trying to get the service to kill itself, after it leaves the other activity without it having to come back to my activity. I've looked everywhere to see if anyone knows how to peek() search() the Activity Stack from a Service. Another way of wording is to check the foreground process from a service.
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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 .
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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.
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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 .
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Jun 14, 2010
How can I start a service from an Activity ?
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Feb 25, 2010
In my app i have an activity from which i want to start an Service.
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Aug 11, 2010
Is it possible to start an Activity from a Service? If yes, how can we achieve this?
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Aug 31, 2010
Android:
CODE:...........
I launched this service from activity
In activity if condition satisfies start
CODE:......................
From my location service mentioned above could not launch activity, how can i get context of current running activity in service class.
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Feb 11, 2010
I have a Service which needs to receive data from external packages. So, to locate the data providing external packages, I use activity- filter and PackageManager.queryIntentActivities function to locate the interesting packages. Now, from each such package, I need to get a ContentProvider URI. So I want to start the external Activity and the external activity will return a result to my service - something like "startActivityForResult". The problem is that there is no way to call "startActivityForResult" from a Service, only Activity can do that, and my project does not have any Activity, and probably can't show UI for the user.
The bottom line: Can anyone suggest a way to get ContentProvider URI from an external package, while my package has only a Service?
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Mar 19, 2010
I've successfully implemented a BootReceiver, AlarmManager, and Service per the code here: http://github.com/commonsguy/cw-advandroid/tree/master/SystemServices...
Inside the doWakefulWork method of the Service I am instantiating a few classes, but some of them require my Activity to be running. How do I actually start the Activity? The code above only starts the AlarmManager and Service.
There are also times where the Activity *is* already started, like if the user manually opened it. So I also need to start the Activity "only if it's not already running". Hows that work?
And what about the situation where the user first installs your application and may not even reboot their phone for a week. In that case, do you have to start the Service from the Activity? But then the Service will die with the Activity.
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Nov 2, 2010
I am making an application that has Activity which communicates with a single service, and is used to start, stop or change settings of that service. I used a singleton approach from this tip.
My problem is that busy-waiting is not working for me and I can't attach a listener to the service because activity gets blocked. I want the service to start or get it's current instance at application start so I put the busy-waiting in onCreate. I'm guessing I'm doing this very wrong, so how do I do this appropriately?
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Jul 14, 2010
Despite similar question was asked, I have differnet situation: My app consists mostly of a background Service. I want to start external activities and get results back.I see several options:Create dummy Activity and keep reference to it for using its startActivityForResult. This consumes quite a lot of memory, as we know. Use Broadcast Intents instead of Android's results infrastructure: ask client activities to broadcast their results before closing. This kind of breaks the idea and not so performance-efficient. Use Instrumentation directly - try to copy code from startActivityForResult into my Service. Use Service interfaces - serialize and add AIDL connection to the Intent for starting an Activity. In this case Activity should call Service directly instead of providing result. The third approach feels closer to Android for me, but I'm not sure if it's possible to do - Service does not have its Instrumentation, and default implementation seems to always return null.
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Nov 13, 2009
I want to develop a application that continuously running in background as service. And after that if i press any numeric key, it should start an application.
I have developed a service which is running continuously. Is it possible in Android?
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Jun 9, 2009
I have a service class my.app.MyService that I'm attempting to launch from my.app.MyActivity as follows:
Intent svc = new Intent( this, MyService.class );
The manifest contains the entries:
<uses-permission android:name="android.permission.ACCESS_BACKGROUND_SERVICE" />
<service android:name =".MyService" />
LogCat gives the message:
"Unable to start service Intent { comp={"my.app/ my.app.MyService" } } : not found"
Could someone kindly let me know what I am missing?
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Jul 16, 2010
I used Toast to make notification, but it seems it will appear even its activity is not in the current screen and some other activity has been started.I want to check this situation, when the activity is not the current one, I'd not send the Toast notification. But how to do ?
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Jan 26, 2009
I have an application with contains multiple activities. The main activity will start the others ( use startActivity() ) depends on user event, when an activity close, it calls finish() and return back to main activity. It appears to behavior like that.
However, the "problem" I see is main activity's onCreate function is called every time. I think the the main activity should be placed in the activity stack and simply push to front when others exit, therefore only onResume, onStart are called. Is there some flag I need to set or I misunderstand the activity behaviro?
In child activity, besides calling finish() or startActivity for main activity, what is other way to move main activity to front?
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Jan 10, 2010
I created an application which enables the user to set whether he wants to receive notification while the application runs in background mode. If the notifications are enabled an activity should be started (the dialog should appear on the screen).
I tried to enabled it the following way:
CODE:...........
This is the method from main activity. When onPause() is executed isRunningInBackground is set true.
When I tried to debug it when the main application was running in the background the line
startActivity(intent) had no effect (the activity didn't appear).
Does anyone know how to midify the logic in order to start an activity from the main activity when the main activity is running in the background (after onPause() is called)?
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Apr 20, 2010
I have tried to write an Android application with an activity that should be launched from a different application. It is not a content provider, just an app with a gui that should not be listed among the installed applications. I have tried the code examples here and it seems to be quite easy to launch existing providers and so on, but I fail to figure out how to just write a "hidden" app and launch it from a different one.
The basic use case is:
App A is a normal apk launchable from the application list.
App B is a different apk with known package and activity names, but is is not visible or launchable from the application list.
App A launches app B using the package and class names (or perhaps a URI constructed from these?).
I fail in the third step. Is it possible to do this?
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Apr 22, 2010
I have a huge maze of activities in my application. What I need to do, is that when the user logs in into the system, the activity history should be cleared. I cant just use finish() when I start a new activity, because I want the activities to have a history until the user logs in. I have experimentet with the different flags when starting an activity, but I have had no success.
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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.
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Nov 19, 2010
I want to start a new activity from ab activity that (extends from Linearlayout) .. but this code is not right
CODE:..........
public class SearchResultForm extends LinearLayout{ ...
And i get this error ..
No enclosing instance of the type SearchResultForm is accessible in scope.
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Aug 19, 2009
An activity can be called from existing activity through *startActivity(intent); *
Is t possible to call an activity from non Activity class ? and how?
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Nov 24, 2010
I'm an android noob that is looking for some advice on how to properly use a service in Android. I am building an app that will connect to a server on the Internet to get a data stream via TCP. That data then needs to get send out to another device that is connected via a bluetooth serial port. I want this to continue to function in the background while the user looks at a different activity. The app will be a NTRIP client, which pulls real time RTK correction data from the Internet and sends it to a RTK GPS receiver that I connect to via bluetooth. The data rate will be about 500 bytes/second. The user interface is a single button to connect or disconnect the data stream and some text to show status of the GPS receiver. There are also a few settings that will need to be configured by the user such as the IP/port of the server to connect to and the bluetooth device to communicate with.I think I need to have the main activity spawn a local service, and then have the service spawn a thread for the TCP stream and another thread for the bluetooth connection. Does this sound right? What is the best model for the service in this scenario?-Start(bind) the service every time the activity starts, and have the connect/disconnect button send commands to the service to start/stop the threads. If I go this route, the service will continue to run after the user disconnects and goes to another app. The service would need an inactivity timer to terminate itself.-Start and stop the service when the user presses the connect/disconnect button. The service only runs when data is moving. If I do this, the activity will need to see if the service is running when the activity starts, in order to know if it should bind to the service or tell the user that the link is disconnected.
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Apr 8, 2010
I am developing an aplication. This one is designed to login a user, then select how find a place, using simple data or using a map. When I try to set in the event OnClick for select the "Map way" (using intent):
startActivity(new Intent(getApplicationContext(), MapviewController.class));
I have problems and didn't work.
My class and manifest are:
CODE:...........
Do you know any way to call the MapActivity from other?
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Jul 15, 2010
I want to show a progress dialog on the screen if the activity is showing. But when the activity window is not showing, it will not do anything. Please suggest, how do i check whether my activity is showing or not?
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Oct 12, 2010
How do I check whether there are any AlertDialogs on the screen programmatically?
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May 20, 2010
Is there a way to check and see if an Activity exists on your device? If I have a youtube video link I want to specify it open in the YouTube PlayerActivity. However, I don't want to crash if for some reason they don't have it.
Is there a way to check and see if the activity exists? I don't think I can catch the runtime exception since startActivity() doesn't throw it.
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Apr 28, 2014
How to check in android when application (not Activity) going to closed?
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Jan 5, 2010
I am working on a travelling application and i am using tabs and each tab has an activity i.e world clock in one tab ,weather data in another tab and so on with in the weather tab i am displaying the users selected cities and the scenario is that when the user selects a city that city's forecast is to be displayed and later to view details as well which is in another activity . how can i launch this new activity from the already started activity with in the same tab ?
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