I have a Service that uses the LocationListener, and it will be running from boot, indefinitely. My question is, how often is too often to listen for location updates? Is 5 minutes a battery killer? What about 1?
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So it looks like mobile phones these days are capable of providing gps data ;) I'm building a django app with a mobile edition that I want to be location aware. My question is, how does one access GPS data? Is there a standard, or do you have to custom code for android/iphone/other. Ideally, I'd imagine it being provided in the HTTP request in the same way you get information such as the IP Address and User Agent.
View 4 Replies View RelatedI'm trying to develop a small app, that can retrieve GPS coordinates, and store them, so I can retrace the path I took. The thing is, the GPS on Android emulator is kind of screwing around with my nerves... First of all, the Mock Position system doesn't work, so I'm manually fixing the coordinates with telnet "geo fix" command. Second of all, the location listener seems to not be refreshing. I'm lauching the app, fixing a first set of coordinates, and observing the response I expect. But when I push a second set of coordinates, the app simply doesn't react.
I tried a lot -big lot- of ideas on this, and I'm kind of running short...
By the way, I'm developping on Eclipse with ADT, and the SDK for Android 1.5 (French HTC Heros are still with Android 1.5) so that I can use my own app.
Here's my code (just the coordinate retrieval part) :
CODE:.................
The application under development was to distinguish between the current location of the android phone based upon GPS signal when it was available. When it is not available, alternate methods are being used to distinguish the user's location. The application uses a private locationlistener class that implements the LocationListener class. The code within the onLocationChanged( ) method to be overridden will draw the location on the google map as a dot as they are received.
I have noticed however that something is amiss. If you start outside the building, it will estimate your position with several dots around your current location. When you walk through a building where you don't get GPS, the dots are not drawn as expected, but as soon as you step outside again on the other side of the building it rapidly draws dots far away from (but leading up to) your location, until it gets to your actual current location. I don't understand how these other values are retrieved and why they seem to poke their ugly heads in, once the user steps back outside............
I am having issues regarding a LocationListener in my Service called myService.
Here is my code:
///onStart method ..
onStart() {
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE)
.
.
provider = locationManager.getBestProvider(criteria, true);
locationListener = (LocationListener) new MyLocationListener();
locationManager.requestLocationUpdates(provider, 0, 0, locationListener);
}
In my Activity there is a button which should stop the service. On the click of the button I am doing:
stopService(new Intent(getApplicationContext(), myService.class).................
I intend to develop an app on android that can help people selecting the best pizza/ice cream/hot dog in a certain town based on their ratings through a poll. Now what resources do I need to achieve the desired solution? Do I need a web service or website/device connectivity for the desired poll? I would like to start off with a simple application that just shows polls or ratings for a certain item.
View 2 Replies View RelatedI've created service which has LocationListener in it. In order to keep service running the service is set as foreground. I have some questions about phone power management and sleeping in that circumstances: Will phone go to sleep while such service is running? How can I save power in this stuation?
View 2 Replies View Relatedyou can subscribe to requestLocationUpdates via two ways one by specifing a PendingIntent the other is by using a LocationListener. When is advised the one and when the other?
View 1 Replies View RelatedI have an android application. Based on the current geo location of user, I want to fetch some remote data in background and store it. My implementation is: At specific interval a alarm fires up my service. Service uses an anonymous class to query current location and registers a locationListener callback. On call of onLocationChanged() I initiate the remote data fetch from server.
However once my service is done registering the location listener using anonymos class, it returns as expected; as it doesn't wait for callback to happen before finishing. Since callback takes some time and makes a call when service has already returned, it throws an error saying: java.lang.RuntimeException: Handler{43e82510} sending message to a Handler on a dead thread
Which is quite understandable. One quick workaround for me now is that I can use getLastKnownLocation from locationManager as that doesn't respond back by callback; but what if I do want the latest location right now, in a service and not activity? How can I wait for callback to happen and stop my service from returning.
Also, at what point does lastKnownlocation gets updated? Everytime GPS registers a new location; does it update it? What I want to know is that if it's not latest can it still be closed to latest? As I didn't see an option in android emulator to configure the time period between subsequent updates.
I am required to work on an application which is be deployed on devices running Android 1.5. The application is supposed to maintain a connection with a server and regularly poll it for new data. The server will notify the client of new data following which the client will connect to the server and download the data.I know that ideally a push based approach will be more conducive here given that we are to run this on a mobile platform. Also, from Android2.2 there is going to be support for C2DM(Cloud to Cloud device Messaging) but as already mentioned this application is for devices running Android1.5.Implementation: I was thinking of using AlarmManager which would Broadcast Intents periodically(poll interval), The Broadcast receiver will then try to connect to the remote server and make data changed check. If the server has an update, the thread will connect to the remote server and download the data from the server.
Problem and Issues: 1. Is this the right way to approach the problem? 2. Is AlarmManager reliable? Would it remember Alarms after a device boot? (I think it does) 3. How do I ensure that battery usage is kept at minimum.(I have heard something about using "keep-alive" to sustain the session for longer time..what is this legend?) 4. What are other things that I need to consider? I am sure I must be missing lots of things here.
Is it possible to do polling in Android? For example, I want my application to monitor a directory continuously. If there is for example a new folder created in that directory I want to log it down. Is it possible to acheive this by polling? Or is there any other way to do this?
View 7 Replies View RelatedI'm trying to pulse my bluetooth dongle, to see if it is range. Every second my Android sends a char to the dongle, which then responds with a char. If there is no response, or the char is wrong, then it should conclude that there is no connection. I'm able to send from Android to dongle (attached to MCU), and the dongle is able to respond. All I need is a simple way to read each char (when received) to compare it. I'm trying to do it in a seperate thread to make it run in its own loop.
Here is my code so far, but I think I might be off, so if you could give me a pointer!
void readFromInputStream()
{
Thread readFromInputStream = new Thread()
{
public void run()...............................
what I need to do is auto-register device if not already done and then start polling messages with the credentials I received through this registration. Now, after I read quite a bit about services, threads, asynctasks and the AlarmManager I'm totally confused about how to handle this. :-s So, there are my two main tasks. What would you recommend as a not-too-silly approach
1.) Registration
I'm currently spawning a service from my UI thread if there are no credentials saved in the DB. Inside this service I start an asynctask that POSTs my request to the server and receives the credentials for the new device. stopSelf ends the service.....................
I am struggling a bit with the LocationListener in Android.I want to make an app that will get the current GPS location, and then afterwards sleep for a long time. A day or more. In this period of time i want the GPS notification icon to not show.What i have now, is in the onLocationChanged a Thread.sleep(x) but this will keep the icon on in the sleep period. How can i do this, and is there a better approach than to use Thread.sleep?
View 1 Replies View RelatedI am working on an Location Based Application. In this application i am using LocationListener class to update the location when the Location is changed.In each Activity i have different LocationListener to update location and do some specific work on updated location. But my problem is that when i am changing my location through DDMS , the LocationListener is being called of that current Activity as well as all the activities of the whole application where LocationListener has been defined. I don't know whether there should be one LocationListener for the whole application or for each Activity we should have different LocationListener.
View 1 Replies View RelatedIs there a way to manually trigger the code inside a LocationListener's onLocationChanged method? It should receive a Location object with the last known location, I guess.
View 2 Replies View Relatedi need to know about the LocationListener() working in the Android DEV Phone(ADP1) Does it expect the user(device) to move in order to update the current location details or it automatically updates when ever the gps is enabled? Another query is regarding the getLastKnownLocation(). When is that last known location will be lost and thus returns null... (ADP1).
View 5 Replies View RelatedHow do I unsubscribe a LocationListener from recieving updates from the LocationManager?
mLocationManager = (LocationManager)this.getSystemService(LOCATION_SERVICE);
mListener = new LocationListener() {
public void onLocationChanged(Location location) {
Log.i("LocationListener", "Logging Change");
}
}
mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
5000, 1, mListener);
After I have exited the the view that created the LocationListener I am still getting log messages in the LogCat window. I understand that this is because I am orphaning the listener but I cannot see any destory method on the LocationListener nor can I see any "remove listener" style methods on the LocationManager object.
i need to know about the LocationListener() working in the real time. Does it expect the user(device) to move in order to update the current location details or it automatically updates when ever the gps is enabled? Another query is regarding the getLastKnownLocation(). When is that last known location will be lost and thus returns null... (in realtime).
View 3 Replies View RelatedI working on the app where I get the data from the server using rest call and add it to the view. I get all the initial data correctly. I use AsyncTask for doing it. Now I want to periodically (say 2 mins) fetch the new data from the server and add it to view.Periodically fetching data (polling) from the server in Android.
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View 3 Replies View RelatedDoes anyone know if there's a way to set the sync interval on accounts via sync adapter in pre-froyo? They've added the API to do so in 2.2 but I'm curious to know if there is a workaround in 2.0-2.1. (My backup plan is the alarm manager) What's odd is there doesn't even seem to be any preset interval either .so accounts are never synced!
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