Android :: Access Handler In Service From Extern Activity
Jun 23, 2010
Ive set an in a running service a handler which does operation every X time. Now after certain time i wanna start an activity from that service, and in onCreate of the activity i wanna access that handler of the service(which started the acitivty) and stop it's schedualed operation
(mHandler.removeCallbacks(someTask));
any idea how will i access the handler which is in the service? the service and the called activity are in the same proccess.
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Nov 18, 2010
I'm confused why is my activity still lagging, I use remote service that has few methods and each has its own work like download stuff, process data, compare stuff, etc... It will run in background and update data at selected intervals and notify user of changes over notify system.
The reason why remote service, because I will eventually add a widget, and service needs to stay running even if android kills the activity, so I unbind it on each onPause().
But as far I understand that part doesn't cause my issue.
But back to my problem... so my is Activity still lagging when I run stuff in service and handler.post method.
here is the code...
Also I wanted to add progressDialog to be updated in updateLayer(...) through Activity is a listener to this service, but thats not working well. Whats the best way to update progressDialog? Ever listener, handler, intent, or what?
So how do I do this correctly?
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Jul 21, 2009
I have an activity called A, and on the selection of menu item 0, it spawns service B, which starts a runnable C in a new thread. I have a TextView in activity A, which I want to access in thread C.
I've tried making the TextView a public static field, but that generates the following error:...........................
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Aug 9, 2009
I've read the android AIDL documentation and have a general idea of how RPC works between an Activity and a Service. However, for my application it seems overboard to implement such features: basically, I want to pass a Service a nice handler so its thread can pass data to my Activity. Currently I'm getting around this by using a static public member (a hack) but I would prefer just passing a Handler object in the Service's starting Intent. However since a Handler isn't serialize-able , I haven't found a way to pass it to the service without a simple static member hack. Any insight? Or, am I just going to have to suck it up and do a formal RPC to the service?
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Jul 26, 2010
Assume that there activity A and B, A has a handler, now B is activate by A, how can i pass the handler to B? Currently i have a thread receive messages from socket, and dispatch messages to A and B, I think when B is activated, pass handler to B, then the handler can receive message from the thread. But I don't know how to do.
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May 30, 2010
I have a Service that downloads a file from the internet. What I want is for the response (an InputStream in this case) to be handled by a custom handler that can be switched (like a strategy pattern) but I can't figure out how to do this. So basically the User of the API would be able to plug in different handlers for the response, some would parse XML, others might save files etc. I realise I could pass through the activity context and execute the method from this (given some interface) but I don't want to do this obviously, in case the Activity is closed in the meantime while the file is still downloaded.
UPDATE - I just had one idea it will work sort of but has problem if the DownloadRunnable gets changed between executions of the downloads.
The modified Runnable interface
interface DownloadRunnable {
void run(InputStream stream);
}
An enum
public enum ServiceHandler {.......................
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May 9, 2010
I try to make several connection in a class and update the multiple progressbar in the main screen. But I've got the following error trying to use thread in android : Code: 05-06 13:13:11.092: ERROR/ConnectionManager(22854): ERROR:Can't create handler inside thread that has not called Looper.prepare() Here is a small part of my code in the main Activity.
public class Act_Main extends ListActivity
{ private ConnectionManager cm;
public void onCreate(Bundle savedInstanceState)
{ super.onCreate(savedInstanceState);
// Set up the window layout
requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
setContentView(R.layout.main);
getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.custom_title); }
public void startConnection() { ......
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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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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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Oct 22, 2010
I want to access a web service in android web application.But I don't have any idea.
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Jan 12, 2010
I want to use the WCF(.net) service for login authentication.Please tell me ASAP, the easiest way to do it.
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Nov 22, 2010
I am trying to access a service in other package, but not able to get the binder.code...
In the ExampleActivity i am accessing the service by doing
but onServiceConnected( ) is not getting called, so i am not able to get the binder. But process everything is going fine , in the Eclipse console i am able
I tried with serComponent( ) & serClassName( ) as well, but for both the cases onServiceConnected( ) is not getting called. I googled and used the hint for listening boot completed and user present intents and starting the service in the broadcast receiver.
how can i access the service of other package (process).
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Apr 19, 2010
I have a service that i need to access across multiple Applications. Can anyone tell me how this can be done?
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Apr 30, 2010
I defined a remote service over a AIDL file. Now i want to access this service in a different application. But how can I do that? The AIDL file is not accessible in my second application, and if i just copy the AIDL file, then the service can't be found.
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Aug 17, 2009
Is there any way, to access the CallLog from a service or BroadcastReceiver?
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Jun 22, 2010
I'm passing in parameters and returning string values, but all I receive is: org.apache.http.conn.EofSensorInputStream. Do I need to do something special in my web service to access the parameters being passed?
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Jun 18, 2010
I have created a service which exposes few AIDL defined interfaces. I want to access this Service from an application with different package. I have no clue how to achieve this. I want to see an example on this.
Unfortunately all examples I see has client application in the Service package it self:(
Could you please share some sample/example code on this?
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May 4, 2010
Is there a way to access the currently active window belonging to a different process from a background service and be allowed to modify some of its properties such as the transparency?
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Mar 19, 2009
In my Android app, a Service runs in the background and logs GPS readings to a database. The user sees an Activity that presents them with radio buttons. I'd like to also log their currently selected radio button to the database. How can I access the radio button object from the Service?
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Sep 16, 2013
Log file that show you the name of the app and time when they accessed a location service ? Or maybe there is already an app who are up to date on this thing.
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Feb 27, 2009
I am coding a basic android application that has to call a web service, using KSOAP2, I am sending a request with one parameter (city) and need to get the response of the web service (basically a short String) from this site:
http://www.deeptraining.com/webservices/weather.asmx?op=GetWeather
When execultin the application, I only get a message: "This application has stopped unexpectedly". When debugging, I am getting the following error:
Thread [<3> main] (Suspended (exception VerifyError) And: ViewRoot.handleMessage(Message) line: 1198 that says: Source not Found And shows a button allowing to: Edit Source Lookup path. What does this basically mean?
My source code that generates the is the following:
private static final String SoapAction = "http://www.deeptraining.com/ webservices/GetWeather"; private static final String MethodName = "GetWeather"; private static final String Namespace = "http://www.deeptraining.com/ webservices/"; private static final String URL = "http://www.deeptraining.com/ webservices/weather.asmx";
And the main part of it: SoapObject request = new SoapObject(Namespace, MethodName); request.addProperty("City", cityname); SoapSerializationEnvelope envelope = new SoapSerializationEnvelope (SoapEnvelope.VER11); envelope.setOutputSoapObject(request); HttpTransport androidHttpTransport = new HttpTransport(URL); try { Result.setText("... Processing ..."); //error here: androidHttpTransport.call(SoapAction, envelope); ...
I am using Eclipse with Android plugin and KSOAP2 library.
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Oct 23, 2010
I'm having a problem while accessing a web service through ksoap2 library, is there any other way to access the web service. I can't use ksoap2 library for my project. Should I create a soap library or any other way.
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Nov 18, 2010
I published the rest service.. but the android app is showing null pointer exception.. but if it access my local machine's service its working well.. the service hosted has anonymous access..
this is my android code...
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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)
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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?
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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.
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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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