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POHow do I stop the user waiting for a long time to get a location fix?
 

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  1. POHow do I stop the user waiting for a long time to get a location fix?
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    <p>I am building a GPS Android application which gets the nearest places based on the user's current location. </p> <p>This is what my application does:</p> <ul> <li>Check if GPS or Network is available</li> <li>If neither is available then don't do anything. Else, we first check for GPS if it's there, if not then we check for Network. </li> <li>After using one of them, we get the current location and then send it off to the server. </li> <li>Once we retrieve data from the server and update the UI, we stop listening for further location updates. Once is enough, until they press the refresh button which starts this again.</li> </ul> <p>What I hope to do:</p> <ul> <li><p>If GPS or network fails to retrieve a location, for example, 2 minutes, then we switch providers. We don't want the user to wait too long. </p></li> <li><p>It would also be nice to be able to use both providers and then get the most accurate from that. I've taken a look at <a href="http://developer.android.com/guide/topics/location/strategies.html" rel="nofollow">http://developer.android.com/guide/topics/location/strategies.html</a> and I saw the isBetterLocation method. How would I integrate this method in my application? I'm having trouble understand how, where and when it should be called. I assume that the isBetterLocation() requires me to call both Network and GPS at the same time. It would be nice for my application to listen to both for accuracy. How do I do this? What if one of them isn't available?</p></li> </ul> <p>Here's parts of my code:</p> <pre><code>if(!GPSEnabled &amp;&amp; !networkEnabled) { Toast.makeText(this, "Error: This application requires a GPS or network connection", Toast.LENGTH_SHORT).show(); } else { if(GPSEnabled) { locManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this); } else if(networkEnabled) { System.out.println("Getting updates from network provider"); locManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, this); } } </code></pre> <p>This is the <code>onLocationChanged</code> method. I get the lat/lng values and then send them off to my server and then do appropriate stuff with it. </p> <pre><code>public void onLocationChanged(Location location) { //Get coordinates double lat = (location.getLatitude()); double lng = (location.getLongitude()); Log.d("MainActivity", "got location: " + lat + ": " + lng); //get nearest locations new GetLocations().execute(SharedVariables.root + SharedVariables.locationsController + SharedVariables.getNearestMethod + lat + "/" + lng); // Zoom in, animating the camera after the markers have been placed map.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(lat, lng), 10)); System.out.println("lat = " + lat + ", lng = " + lng); //Stop listening for updates. We only want to do this once. locManager.removeUpdates(this); } </code></pre>
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    1. USRandomMooCow
    1. USJohnathan Au
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      1. POHow do I stop the user waiting for a long time to get a location fix?
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    1. COYou've seen this?: http://android-developers.blogspot.com/2011/06/deep-dive-into-location.html. And the protips sample app?: https://code.google.com/p/android-protips-location/
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      1. POHow do I stop the user waiting for a long time to get a location fix?
      1. USCharlie Collins
    2. COThe network provider is inaccurate, but it returns the location in less than a second
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      1. POHow do I stop the user waiting for a long time to get a location fix?
      1. USReno
    3. COHi Reno, Thanks. I understand that GPS and Network differ in terms of accuracy and speed and this brings me to my question, how do I implement a feature whereby, if either providers are available, I get the location based on one of the providers, preferably GPS because it is the most accurate, then if a fix is not found after x amount of time, I try to switch over to Network provider, if it is switched on.
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      1. POHow do I stop the user waiting for a long time to get a location fix?
      1. USJohnathan Au
 

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