Android :: How To Start Activity From Service - If Not Already Started

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.

Android :: How to start Activity from Service - if not already started


Android :: Detect Activity Started From Service

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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Android :: Finish An Activity Not Started From Service

Jun 17, 2010

I've a service which listens to user request for ending one activity and starting another activity. For Ex: Say there are activities1,2 ,& 3. Now if there is already activity1 started by someother activity then based on the user request i need to stop activity1 and start activity2 or activity3. If the acitivity1 is started by my service then i can do finishactivity(requestcode) and shall receive a call to onActivityResult() then i can start next activity 2 or 3. But can i stop the activity1 which is started by some other activity from a service?

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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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Android :: Start Activity From The Service

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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Android :: Start An Activity From A Service

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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Android :: Start Service Without Using Any Activity

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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Android :: How To Start Service From Activity?

Jun 14, 2010

How can I start a service from an Activity ?

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Android :: Start Service From Activity

Feb 25, 2010

In my app i have an activity from which i want to start an Service.

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Android :: Start Activity From Service

Aug 11, 2010

Is it possible to start an Activity from a Service? If yes, how can we achieve this?

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Android :: Start Activity From Service

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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Android :: Start Activity From Service - And Getting Result From It

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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Android :: How To Wait For Service On Activity Start

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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Android :: Analog Of Start Activity For Result For Service

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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Android :: Start Activity From Service - Running In Background

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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Android :: Activity Is Unable To Start Service In Same Package / What I Am Missing?

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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Android :: Android Service Design - Start With Activity Or When Needed?

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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Android :: Handle Screen Orientation Changes With An Activity Started Within A Tab's Activity

Nov 2, 2010

I have a TabActivity, and each Tab corresponds to its own Activity. In one of them, in the onCreate method, I use startActivityForResult to show a dialog (specifically, Bump's BumpAPI activity).

code:...............

The problem is that when the screen orientation changes, it tries to create the tab's activity again which makes another BumpAPI dialog, resulting in multiple stacked on top of each other. Do I have a hook into the started activity to cancel the previous one when the orientation changes?

A workaround seems to be to add a button that when clicked, starts the second activity, but that adds an unnecessary step.

Also, I can't fix the screen orientation for the entire tabActivity because some of them require typing and users may want to use their physical keyboards.

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Android :: Finish Activity Not Started From Current Activity

May 1, 2010

I have following problem with my application: From my main activity ("activity 1"), there is a menu from which user can launch an action. This action will result in an Intent being received by a BroadcastReceiver, defined in my application. Finally, this BroadcastReceiver will start an activity ("activity 2") to deal with this intent.

The problem is that I have a "quit application" entry in my menu, and I can only finish() currently active activity. ie I am not able to finish "activity 1" from the menu of "activity 2". And I can't use startActivityForResult() as "activity 2" can't be started from "activity 1". Any suggestion would be much appreciated Thank you very much guys, regards.

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Android :: Know Who Started(bind) Service?

Jun 14, 2009

How can I know who started(bind) service?

I already check 'RunningServiceInfo()' but I couldn't find.

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Android : Name Of Package That Started A Service?

Jul 8, 2010

I am writing a service that will be compiled into a .jar file for use in other apps. is there any way to get the name of the package that uses or launches the service?

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Android :: Unable To Start Service Intent Service Not Found

Aug 20, 2009

I am getting following message when i try to launch service.Also is there any specific path on file system where we need to place the .apk file which contains my serivce component only.

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Android :: How Can I Ensure A Service Is Started At 9am And Stopped 9pm Every Day?

Jun 25, 2010

I have a service that will monitor location changes daily. What I know so far that to start a service at boot, I have to follow the linked tutorial. This way I can get the service started at boot, but to save battery I need it only between 9am-9pm.

Question is pretty simple, so I will repeat:

How can I ensure a service is started at 9am and stopped 9pm every day?

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Android :: Reconnect With Started Service And Want To Kill It / Know Its Already Working?

Mar 20, 2010

I am looking to code simple application

let's say I have an activity that starts a service which is simply a counter and counter value is reflected on activity UI , when I navigate away from this .I want this counter to be continue and when I get back to Activity I want to see counter count.so the question is

how can a reconnect with the started service and then if I want to kill it ? how can I know the service is already started?

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Android :: Creating A Service That Survives Application That Started It?

Nov 10, 2010

I'm developing an Android application that consists of:

a lightweight background service that logs events to a DB
a heavier GUI application that summarizes these events and displays graphs.

I'm having trouble creating the service part, though. The graphic application can use quite some RAM, and when it goes to the background, the OS closes it after some time of not being used.

The problem is, when the application gets shut down, so does the service. This is bad because this keeps me from recording further events. I don't care if the application gets terminated, but the service needs to keep on running.

I have tried numerous ways to keep the service alive, like having it use threads or a differently named process than the main app. Nothing has worked, and I have found no help on any of the android developer pages or forums.

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Android :: How To Stop Service Started By BindService() With Bind_auto_create Option

Nov 18, 2010

I start service by using:

private ServiceConnection _serviceConnection = new ServiceConnection() {...}
bindService(new Intent(this, MainService.class), _serviceConnection, Context.BIND_AUTO_CREATE);

I want to 'restart' the service. (Let's not argue why I want to do that)
I do that by:

unbindService(_serviceConnection);
// Do some initialization on service
bindService(new Intent(this, MainService.class), _serviceConnection, Context.BIND_AUTO_CREATE);

I noticed service doesn't die(onDestroy doesn't run) until I call next bindService();
So some static initialization I did on service got cleared by onDestroy() implementation.

Question: How do you make sure unbindService() will stop service (run onDestory()),
so that I could do initialization after and re-run bindService()?

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Android :: Inform An Activity That Another Was Just Started?

Mar 31, 2010

I just want to get numbers of times to be used for each Activity.
So the very straightforward method I thought is increasing the count for an Activity when it was started. But how can I get the information?

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Android :: Can An Activity Find Out Where It Started From?

Jun 18, 2009

Is there a way to do this?

Can you access the activity stack in a way to grab what activity came before the one now in view?

I have a situation where an activity needs to know where it was started from, so it knows what data to display in that current activity.

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Android : How To Know What Activity Has Started Current

Oct 19, 2010

How can I know what Activity has started the current Activity? Is there any specific method like, i.e. getIntent().getCallerActivity() or the only way is saving some information within the Intent using putExtra()?

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Android :: IF Statement For Intent Started Activity

Aug 25, 2010

I have a central activity that can be launched from two separate classes. I was hoping that in this central activity I could have an IF statement like

if(this.getIntent() == MainMenu.class)
{
// Do something here
}

But obviously that isn't legal so how could I structure an expression to check from what class an intent was started.

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