Android :: Service Binding Relation
Apr 30, 2010Can one service be bound to n activities?
View 1 RepliesCan one service be bound to n activities?
View 1 RepliesI 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 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.
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?
View 1 Replies View RelatedIs 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 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 Relatedthe location where the audioflinger, surfaceflinger and cameraservice talk to MediaRecorder's APIs? Is there any relation between MediaRecorder and AudioRecord?
View 6 Replies View RelatedWhat is the importance of "res" and "src" folders in eclipse-android while creating android project.
View 2 Replies View Relatedi'm using PreferenceActivity class to configure my widget. PreferenceActivity class automatically saves user preferences, so in widget update service i can call context.getSharedPreferences() and i obtain user preferences.Problem is follow: if you have many widget of same type, how PreferenceActivity class saves prefs? how i can load appWidgetId specific prefs from sharedPreferences?
View 7 Replies View RelatedThis is my first post and Its for sure not going to be my last
I was just wondering a few things
1. I'm getting the Nexus One and putting the SIM Card from my other Rogers phone into it... will there be any problems/pitfalls i should look out for?
2. As far as applications go, if I don't have a data plan, will i be paying out the rear end to use apps such as facebook, last.fm etc?
3. Is there an app that lets you text/call for free?
4. Do you have to have a data plan to download apps when not in range of WiFi (if so how much does it cost to browse the store and download an app?)
5. Does it cost anything to use the GPS (Do you need a GPS plan?)
6. Is there an app that lets you track Text messaging usage, call time, data usage etc?
Any one can help interpret the relation between the table "contacts" and "raw_contacts"?Is it one-to-one or one-to-many relation?I am puzzled because the SDK seems indicate it is one-to-many relation but after I checkout all data from the database table,I found it is one-to-one relation. And is there any detailed relation diagram describing android database tables?
View 8 Replies View RelatedI am a current iPhone 3gs user migrating over to Android this Friday and getting the Evo 4g. Now, all iPhone/iPod touch screen sizes are the same and all the hardware specs are the same for the most part, but with Android you all kinds of resolutions, screen sizes, processors, etc etc...
Are all apps made for Android stretched to accomodate bigger screen sizes? For instance, I have played with my friend's Droid on Verizon and the screen is 3.7" at a resolution of 854x480 and he has showed me games on it like Gameloft's NOVA which is a full 3D first person shooter. So his phone essentially has a bigger resolution slightly than the HTC EVO 4G but smaller screen size (3.7" vs. 4.3"). So would the same game be stretched to fit my phone?
I'm wondering with different apps, are there any conflicts in relation to different spec phones?
I am trying to learn opengl stuff on Android. In the gl.gltranslatef(x,y,z) call, I am shifting my texture by some units in the +ve x direction. But I am unable to find the number of pixels does 1 unit of x belong to?
Here is what I am doing:
I call gl.glviewport(0,0,width,height); // This will set my rectangle with 0,0 as lowerleft corner and then extend it to accommodate width and height.
Then
I call to gl.glfrustrum(-5,5,-7,7,3,7); // I am little confused how this call is using the dimensions I set in gl.glviewport.
How will -5 to 5 units from left to right in the above call, translate to pixels on the screen of android?
I mean if width = 320 and height = 533 pixels, then what will be the number of pixels occupied on the screen due to the gl.glfrustrum call?
I am experimenting in the gl.gltranslatef call by specifying xshift as 5.0, but it does not translate the bitmap at the right or left corner of the screen, when I increase it to 6, part of it is still visible on the screen.
I am searching for the maximum number of units (in terms of X) which will represent extreme corners of my android phone screen.
Im on 3 and as of yet there is no update to 2.1 so im on 1.5 ..now this maybe the most stupid question ever but in the sticky slug posted it says coustom ROM'S and all of them are 2.1 does that mean i have to have 2.1 update to be able to use one of these ROM'S, if not what are your recommendations for a custom ROM ie what one from the list is best and why . what will they do/ what do they do , will it improve this already good phone and in which ways , also if i am able to put one onto the phone how do i do it.
View 10 Replies View RelatedI know there is a Google Checkout API, but that seems it is more for creating a shopping cart, and interfacing payment methods w/ Google Checkout. Is there any management tool that allows one to 'easily' communicate with the customers? Automate a thank you message, or something?
In addition we have already had one customer call to say he had multiple $1.00 charges for our $0.99 app.
I purchased our $0.99 app and sure enough, I have the following holds on my account 02/20/2009 5399 GOOGLE $1.00 02/20/2009 5399 GOOGLE $1.00 02/20/2009 5399 GOOGLE $0.99
This does not seem right, especially if someone is buying more expensive applications, or using a one time use card.
I'm a little confused on how binding to services works. I understand using Context.startService() starts the service and that bindService doesn't call onStartCommand. But my understanding is that if I use startService, I have to explicitly stop the service. But I want the service to die if there are no more activities bound to it.My problem is that calling bindService never calls onServiceConnected(), so my Service binder object is null. Does the service have to be explicitly started in order to bind to it? If so, how does it know to terminate when nothing is binding to it anymore, and how do I know if it's started so I can know to use the bound object?
View 3 Replies View RelatedI am just starting out with Android and I am attempting my first test app, but I am a bit stuck.
I have an SQLite database and a user is selecting a picture and a reference to this a long with a short description is getting stored in the database. This is all working fine, now I want to bind the images from to database to a gallery, but I am a bit confused how I do this.
My layout xml is as follows:
CODE:.................
I want the gallery with a button below
My on create function I have the following:
CODE:...........
I am using the notepad tutorial as an example and my class extends ListActivity.
When I run it I get the error
Your content must have a ListView whose id attribute is 'android.R.id.list'
I'm assuming I am using the wrong type of binding, but I can't seem to find anywhere that tells me how to bind from an sqlite DB to a gallery.
I also want to add a reference to the rowId in the gallery so when the image is clicked it will open the relevant page (so it can show the message)
Has anyone succeeded in running the Java bindings for dbus on Android? All indications point at dbus already running as a process within the Android OS, but there is no official access point for them through the Java interface.
View 1 Replies View RelatedI am new to both Android and Stack Overflow. I have started developing and Android App and I am wondering two things:1) Is it possible to parametrize a TextView? Lets say I want to render a text message which states something like: "The user age is 38". Lets suppose that the user age is the result of an algorithm. Using some typical i18n framework I would write in my i18n file something like "The user age is {0}". Then at run time I would populate parameters accordingly. I haven't been able to figure out how to do this or similar approach in Android. 2) Let's suppose I have a complex object with many fields. Eg: PersonModel which has id, name, age, country, favorite video game, whatever. If I want to render all this information into a single layout in one of my activities the only way I have found is getting all needed TextViews by id and then populate them one by one through code. I was wondering if there is some mapping / binding mechanism in which I can execute something like: render(myPerson, myView) and that automatically through reflection each of the model properties get mapped into each of the TextViews. If someone has ever worked with SpringMVC, Im looking for something similar to their mechanism to map domain objects / models to views (e.g. spring:forms)
View 1 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 Related