Android : Get More Accurate Location - When Using MyLocationOverlay
Aug 2, 2010
I'm trying to get my current location and show it on a map. Class com.google.android.maps.MyLocationOverlay.MyLocationOverlay does most of the work for you. But it's coming back with a very coarse result that's off by a couple of clicks. I'm listening for onAccuracyChanged() but that never gets called.
How can I get a more accurate location, when using MyLocationOverlay ?
PS. manifest has
<application android:icon="@drawable/icon" android:label="@string/app_name"
android:debuggable="true">
<uses-library android:name="com.google.android.maps" />
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
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May 30, 2010
I'm writing my first location based android app, but got confused about some of the GPS service api. Here are some questions I have:
1) To get my current location, I called requestLocationUpdates() with a listener in the onCreate() method of one activity. But what happens when another activity starts and the current activity goes invisible? Is the GPS location update going to stop? If so, how do I keep it on after the activity is switched?
2) how accurate is the Location.getSpeed()? How is it computed? Can it tell the difference between on bicycle and on foot?
3) not really a question about android. How to calculate the coordinates of a location, say, 100m away from my current location?
4) To stop the GPS, I only need to remove all the listeners that have been registered to locationmanager?
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Jan 2, 2010
I recently posted this question on stackoverflow (http://tinyurl.com/ yzrofne), but maybe someone here can help me. I am using the location manager's requestLocationUpdates() method to receive an intent to my broadcast receiver periodically. The system is correctly firing the intent to my broadcast receiver, and I have been able to use it correctly. The only problem is that the GPS location provider only stays active for a few seconds after the initial location acquisition, and I need it to stay on a little longer so that the location estimates are more accurate. For example, if I tell the location manager that I want an update every 5 minutes, it correctly fires the intent with location information from the GPS. However, the GPS only stays active for about 5 seconds, so it doesn't give much time for the location to reach a high accuracy (say, less than 10-20 meters). My question is how to make the GPS location provider stay active for each periodic request that comes from the LocationManager requestLocationUpdates. Does anyone know how to do this?
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Sep 19, 2010
What should I have my GPS settings on to get best location? I think I changed them and now it shows me like 10 blocks from where I am?
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Jan 22, 2010
I opened google maps and my location is not accurate at all. I understand that if I turn on gps options it becomes much more accurate, but it's a real battery eater. coming from a 2 year old samsung mysto on Helio network that ran google maps down to the meter for me (and only needed to be recharged every 4 days) it seems like this should work better.Am I missing something? That little mysto couldn't have been running active GPS pinging the whole time. What made it so much better at locating?
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Jan 2, 2010
I am using the location manager's requestLocationUpdates() method to receive an intent to my broadcast receiver periodically. The system is correctly firing the intent to my receiver, and I have been able to use it correctly. The only problem is that the GPS location provider only stays active for a few seconds after the initial location acquisition, and I need it to stay on a little longer so that the location estimates are more accurate.My question is how to make the GPS location provider stay active for each periodic request that comes from the LocationManager requestLocationUpdates. Does anyone know how to do this?
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Mar 11, 2010
I am trying to determine the most accurate location of a device, in the shortest time possible.I am storing the data as a geopoint, and have it displayed on a mapview.The last time I activated the GPS on my device and let it get a location lock, i was approx 80 miles from where I am now.I have a location manager setup and a location listener.If I do this, I get NULL. myLocOverlay = new MyLocationOverlay(this, mapView); GeoPoint test = myLocOverlay.getMyLocation(); but in the next couple of lines; myLocOverlay. enableMyLocation(); mapView.getOverlays().add(myLocOverlay);With this, the overlay on the map shows the current location. It is using the Network provider, but is also attempting to get a GPS fix (it can't as I am indoors and no where near the top floor).If I construct the geopoint like this Short of getting the geopoints from both GPS and Network and then comparing them, and disregarding the GPS result if it is say 1 mile out of the Network location - i'm a bit stuck. why doesn't getMyLocation() work, shouldnt that return the GeoPoint of what myLocOverlay is showing on the mapview?
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Nov 22, 2010
I have used this code
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
500, 50, this);
to get my location using GPS. From what I understood, this code updates the GPS every 500milliseconds until the accuracy is about 50ms. Right? Now how do I know when it has achieved this accuracy? So that I can send the most accurate location in a text message.
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Apr 15, 2009
I've poured over the docs and haven't been able to figure this out. Is it even possible?
Relevant documentation: http://developer.android.com/reference/com/google/android/maps/MyLocationOverlay.html
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Jul 12, 2009
I'm totally new to the G1, coming from an iphone, but my gps when on (and can actually get a signal lock), seems to always have me on the grass or in the water if driving my any. Its rarely ever where I am. and im in a major city. Perhaps that could be why, but i always have clear view to the sky.
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Oct 26, 2010
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I want to override the method enableMyLocation() in MyLocationOverlay class, in order to implement my own positioning algorithm to get latitude/longitude, and then plot them onto a MapView. I figured out how to do that, but now I'm stuck because I dont know what Canvas to pass when I call the method drawMyLocation().
Here is the MyLocationOverlay class
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