I am writing application that has service that provides real time data to subscribers via remote callback mechanism. Now I wanted to add a widget that visualizes essential part of this data but got error: "IntentReceiver components are not allowed to bind to services". So what's the right way to get data from that service?
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I am very new beginner, and I am designing a small application as below.
- After a user starts the application, he/she can click the start button to start a background task. (e.g. retrieving the news headlines periodically, then do something...)
- Even after the user quits the application, the background task still running.
- To stop the background task, the user needs to run the application again, and clicks the stop button to stop the background task.
In the above scenario, what API should I use ? (Local Service Binding ? Remote Service Binding ? Handler ?)
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 RelatedCan 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 RelatedCan one service be bound to n activities?
View 1 Replies View RelatedAfter I Bind to a service inside the method I start a CountDownTimer. The problem is that the timer does not start counting down. I have gone through with the debugger and sure enough it is executing the method that starts the Timer.If I use a button to start the timer it works! What could I be doing wrong?
View 1 Replies View RelatedI have a service component (common task for all my apps), which can be invoked by any of the apps. I am trying to access the service object from the all activities, I noticed that the one which created the service [startService(intent)] has the right informaion. But rest does not get the informaion needed.
My Code is as below:
CODE:................
If I invoke startService(intent). it creates a new service and runs in parallel to the other service.
If I don't invoke startService(intent), serviceObj.getData() retuns null value.
Is there any fundamental difference in binding a service to an android.app.Activity vs binding it to an android.app.Application. I want to bind the service to an Application because I want to keep some global state/data in the Application instead of duplicating it in all my activities.
View 1 Replies View RelatedI am binding a remote service from an activity and unbind the same on the onPause of the Activity,when the activity again restarts i bind the service .It does bind with the remote service and i am also successful in getting the remote-service method getting executed after the restart.But when returning a message from the callback-RemoteCallbackList.the mCallbacks.beginBroadcast returns me 0 clients.Am i missing some thing here ?why am i am getting zero clients when I call mCallbacks.beginBroadcast.?
CODE:....................
I made a code for my understanding of Android Service class.
It has just a single Activity and Service in apk. Service is the same as the sample code of API reference as below: http://developer.android.com/intl/ja/reference/android/app/Service.ht...
A client side is an Activity based on the above sample, and just added the following code:
CODE:.......
My sample application has a check box which starts(binds)/unbind to the local service on a single process. The local service instance is created by every bind request (and destroyed by every unbind).
If I press the button repeatedly, then LocalService$LocalBinder is leaked!
The problem is not resolved even If I set an obtained binder to null (like below).
CODE:...............
I want to know what es the best place in an Activity to bind to a service? I saw examples doing it in onResume() and also in onCreate(). I was asking myself if it is not a problem putting it into onCreate(), cause in onPause() i will do a unbind to the service, so i dont get a serviceConnectionLeak, if i leave the activity. Now if i press the Home-Button and then switching to the HomeScreen, the Activity will unbind from the service, when i go back to the Activity from the Taskmanager, then onCreate() will not be called and if the Code is trying to access a function from the service i will get a null-pointer exception. If i bind and unbind only in onResume() and onPause() i dont have this problem.
View 3 Replies View RelatedMy application has the following components: 2 Activities A Service and a BroadcastReceiver
Whenever the user updates the system time, my broadcast receiver receives the Intent.ACTION_TIME_CHANGED. Now when this happens I want to reschedule a Handler in my Service. How do I bind to a Service within my BroadcastReceiver?
I am writing a widget on Android 1.6 that shows the minutes that a person has used on the current month.
The way I have it setup is by having a service that listens to the state of the phone and when the phone is picked up, it starts the timer and when the person hangs up, ends a timer. I would like to send this variable(long duration) over to my appWidgetProvider so I could update the edit text on it.
I have a local Service to which multiple activites needs to bind. In the first launched Activity, bindService returns true and onServiceConnected is called. But in any additionally launched activites bindService returns false, and I can't get a reference to my Service.
How can multiple activities simultaneously be connected to a local Service?
As a point of example for my problem, I wrote a single Activity which binds to a service and then accesses a property to display. The problem is that my TestServiceConnection.onServiceConnected method is never called, and I don't know why.
Here is the code:
CODE:......................
Is is possible to send an object to an Android Service through an Intent without actually binding to the service? Or maybe another way for the Service to access Objects...
View 2 Replies View RelatedI currently building an android apps that retrieve data from a distant Web service and I search an efficient way to bind data form XML to ListView. I already use CursorAdapter and i search on the web for an "XmlAdapter". I read on Google IO topic "Coding for Life - Battery Life, That Is" (http://code.google.com/events/io/sessions/ CodingLifeBatteryLife.html) that is more efficient to use "stream parser" instead of "tree parser" but I don't find the way to build a class that implement ListAdapter because of stream parser can't navigate backward so I don't understand how implement method that use "position" parameter (How retrieve data before current XML Parser position?).
View 8 Replies View RelatedThere is no solution for this?
View 4 Replies View RelatedCan anyone tell me if its possible to create some kind of custom adapater for XML data to a Spinner? I'm wanting to create a set of XML data that contains city names & latitude/longitude positions but only display the city name in the Spinner and access the lat/long when a new city is selected.
View 2 Replies View RelatedI'm trying to bind data from my SQLiteDatabase to a ListView. I'm currently using a SimpleCursorAdapter to fill in my ListView. Unfortunately this doesn't seem to work with setting a CheckBox's checked attribute. This is how I do it now; instead of changing the CheckBox's checked status the adapter is filling in the value to the text argument, so the value is displayed right of the CheckBox as text.
Java:
setListAdapter( new SimpleCursorAdapter( this, R.layout.mylist, data,
new String[] { Datenbank.DB_STATE, Datenbank.DB_NAME }, new int[] { R.id.list_checkbox, R.id.list_text } ) );
mylist.xml:
<?xml version="1.0" encoding="utf-8"?> <LinearLayout android:id="@+id/LinearLayout01"
android:layout_width="fill_parent" android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android" >
<CheckBox android:text="" android:id="@+id/list_checkbox"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:checked="false" > </CheckBox>
<TextView android:text="" android:id="@+id/list_text" android:layout_width="wrap_content"
android:layout_height="wrap_content" > </TextView> </LinearLayout>
The field in the database is of course of type boolean and I've also tried to assign an id to the checked field to fill the value in.
I need to be able to scroll through a list with (up to) 20K rows, backed by a cursor on a read-only db. Testing 20K rows on a G1, the query takes approx .02s regardless of table size, while binding the adapter to the list takes 4.5s. Note that this is before the view calls used in rendering. What makes the binding delay more troublesome is that it blocks the UI thread, and is incurred on every rotate. Combine these, and doing a rotate just after starting the bind results in a delay up to 9s.
I tried lazy loading with a base adapter, but that hits the same delay in the underlying cursor.getCount(), and the overall user experience isn't ideal. I also considered using an ArrayAdapter, adding synthesized objects from the cursor rows, but then I'd incur the overhead of creating up to 20K objects (not to mention the additional memory requirements).
I wanna develop an app that uses CSD or Data channel of GSM Service to send data. Can anyone help me out with it?
View 1 Replies View RelatedI had been using the DATA TOGGLE widget for couple days, today strangely the widget was not functioning, it was not possible to turn on/off data. I tried uninstalling the app but still the problem persists.I tried switching off the phone, remove battery didn't work also tried the airplane mode on/off without luck also tried changing the ENABLE DATA in the settings no luck Cleare all current APN's and re installed the APN settings but still the problem persists?
View 3 Replies View RelatedI'm having trouble getting my widget to stop hogging so many resources.I setRepeating on the AlarmManager to update. When the widget is deleted (onDisabled()), I call .cancel() on the service, but the service still shows up in the android "running processes" making me believe I'm doing something wrong.Also, should I be scheduling my updates in the onEnabled() or the onUpdate()? onUpdate doesn't seem to work on anything other than the first widget.
View 1 Replies View RelatedI have made a Android Widget which displays two articles (title + image). In addition to this, I have buttons for flipping backward and forward through the articles. What I don't understand is how I can change the Widgets RemoteViews when the buttons are pressed. Which should be one of the most basic operations in a widget, however, I can't seem to figure it out.
So... Can I do this with just a OnClickListener in the AppWidgetProvider? Or do I have to create an Activity without a window (visibility = false)?
I was interested in developing a clock widget for the homescreen and upon reading Home Screen Widgets tutorial, I wondered if there is a pre-existing Service I could reference for updating the current time rather than re-inventing the wheel?I download the Retro Clock application on my android phone and noticed that when I click it, it pops up the Alarm Clock settings, but with the default Google Analog Clock widget, upon click does nothing.Is that because the Retro Clock widget implements the Alarm Clock service? If so, how can I go about referencing that service? Or do I have this all wrong and misunderstood?
View 4 Replies View RelatedI'm having trouble starting a Service to update an AppWidget that I'm creating as an exercise. I'm trying to get the latitude and longitude of spoofed location data from DDMS to display in the widget. The widget uses a service to update the TextView, which may be slightly overkill, but I wanted to follow the template that seems to be common in AppWidgets that do more work (like the Forecast widget or the Wiktionary widget).
Right now, I'm not getting any error messages or strange behavior; nothing at all happens when the button is pressed. I'm a bit mystified as to what might be wrong. Could anyone out there point me in the right direction?
Additionally, if my logic for location is faulty, I'd love recommendations on that too. I've looked at several blogs, the Google examples, and the documentation, but I feel a little fuzzy on how it works.
Here is the current state of the widget:
CODE:.....................
I'm stuck on a tough architectural problem. I have a collection of web services that produce data that will populate UI components - Text Views, List Views, and so on. Each web service may take up to about 10 seconds to respond, or it might not respond at all. When I click a button in the UI that requires data from the web services I need to show a Progress Dialog until either the data arrives or it times out. I'm pretty sure that an Intent Service is the best way to wrap the web services. From the documents (http://developer.android.com/reference/ android/app/Intent Service.html) "This "work queue processor" pattern is commonly used to offload tasks from an application's main thread." Also "Note that unlike other application components, calls on to the IBinder interface returned here may not happen on the main thread of the process."
The UI needs to get data back (asynchronously) from the Intent Service, which means using AIDL, onBind, and all that. But from the documents (http://developer.android.com/guide/developing/tools/aidl.html) we have "By default, IPC calls are synchronous. If you know that an IPC service takes more than a few milliseconds to complete, you should not call it in the Activity/View thread, because it might hang the application (Android might display an "Application is Not Responding" dialog). Try to call them in a separate thread." Of course, that "separate thread" stuff in the AIDL docs in nonsense. If you spawn a separate thread in an Activity it will get blown up in On Destroy. But what do they mean by "By default"? Are there cases where the IPC can be asynchronous? Is that what is meant by the text in the Intent Service docs "may not happen on the main thread"? How does this work?
I have created an activity that calls a service. This service receive an XML feed and parse the info. Each time I get the info for a new station i want to send the details (Name,Id,Location all as string) back to my main activity so it can load it inside a list view. When I run my code inside the main activity it works. When I move it to a service I cant send the data back. This is what I have tried. After getting the current station info from I do this: submit Station(namer, loc, ids, dis, types); then: private void submit Station(String names, String loca, String idss, String diss, String typess){Intent intent = new Intent(NEW_STATION_LISTING); intent.putExtra("Station Name",names); intent.putExtra("Sid", loca); intent.putExtra("StationLoc", idss); intent.putExtra("Distance", diss); intent.putExtra("Types", typess);send Broadcast(intent);}
View 3 Replies View RelatedI have just started using services in Android and I have a made a simple service that is polling a server every 20 seconds. Now how can I get this data from my main activity (when it is active)? Alternatively the service could send it back do my main activity (but only if its active). I don't want to wake up my activity. I have read SDK examples of "Binding" but I can't find an example how to actually get something from the service. Just how to start and stop the Binding. From the example. If I have the "mBoundService" object in my activity how do I get my data from the service method called eg. "polling Data()"?
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