Android :: Fastest And Most Reliable Location Provider
Mar 31, 2010
I am working on an app that fetches localized data from the Web based on the user's long/lat. Currently I am querying the system for the best enabled provider [my criteria defines best basically as most precise--not sure if this is the best idea for my application, as at the point where I fetch data it really doesn't matter if the user is here or 3 miles from here.].. But anyhow, I'm curious as to what is most reliably the fastest Location provider? Network or GPS? My app hangs a bit "Acquiring your location" on my loading screen and I'd like to cut this wait time down as much as possible.
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Jan 27, 2010
I have an application which uses the network as the location provider (rather than GPS eg.), however I can't seem to figure out how to send the emulator test coordinates. In DDMS I would usually send coordinates in the Emulator Control tab.Is there a place to simulate coordinates derived from the cell phone network provider?
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Jun 25, 2009
The way we are retrieving locations from our Android phones is to 1st get a Coarse Location followed by a Fine Location. This is for the case where the user may be inside a building initially and unable to track satellites. After we get our coarse location we transition to a fine location to track satellites. This method has been working fine for several months. We recently upgraded to 1.5 and our mapping application, to my recollection continued to work.For the past couple of days we have not been able to get a coarse location and we are receiving a status message in the onStatusChange callback of.We have re- installed previous versions our code that used 1.1 and we are receiving the same status message of .TEMPORARILY_UNAVAILABLE. Other than the obvious description of the constant, we can find no meaningful information.
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Jul 11, 2010
I know that the GPS altitude data isn't particularly reliable, so I looked for alternatives. This looks like a good solution I found here: But the value returned is not what I expected: -1.79769313486231E+308 I'm not sure what I'm supposed to do with this figure...
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Jan 4, 2010
I know how to get the calculated GPS position via getLastKnownLocation (). As tests show, this function really always returns the last known location, so it doesn't matter if there is a gps fix available.
How can i check if the returned location is reliable? I tried it with getAccurracy(), but this function even returns a accurracy although no gps fix is availavle (anymore). Is there a possibility to get gps dop values? Used SDK is 1.6.
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Oct 21, 2010
i have developed an app which just notify when location changed. it used GPS_PROVIDERS as provider. but as devices go inside of some building. it stop listening. i want to change the provider at that time to network provider.. so should i write locationManager.requestLocationUpdate method there in status change method of listener.with provider to network provider. or something else will do the task.
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Nov 23, 2010
As I understand it, I have three location providers to choose from: GPS, Network and Passive.
I would like to obtain my location by detecting the Wi-Fi network I'm connected to, I believe both Cell Triangulation and Wi-Fi location determination is covered under the Network provider.
However, despite being connected to a Wi-Fi access point, my program always seems to use cell triangulation rather than Wi-Fi to determine my location (assumed based on the huge inaccuracy of the returned coordinates).
It doesn't look like there's any way to force the use of Wi-Fi only? How does Android decide when to use Wi-Fi over cell triangulation?
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Apr 8, 2010
How can I find out that the GPS provider has failed to get location in android?
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Mar 16, 2009
I am unable to get the location updates when i use Network location provider. From the older posts i understood that to use NW location provider we need to do the following. code...
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Oct 22, 2009
Looks like I've run into some breakage from 1.5 to 1.6 after all. I am registering location listeners with LocationManager.requestLocationUpdates() With GPS as location provider, I run into a problem with navigation stopping by itself after a few seconds, just to return, stop again, in an endless cycle. I haven't seen this prior to 1.6 Donut and I have no clue what might cause this problem.
Here's the Logcat output:
10-21 21:53:09.147: DEBUG/libgps(74): PDSM_PD_EVENT_GPS_BEGIN 10-21 21:53:11.177: DEBUG/GpsLocationProvider(74): exceeded MIN_FIX_COUNT 10-21 21:53:11.177: DEBUG/GpsLocationProvider(74): stopNavigating 10-21 21:53:11.177: DEBUG/libgps(74): qct_gps_stop 10-21 21:53:11.187: DEBUG/libgps(74): PDSM_PD_EVENT_END 10-21 21:53:11.187: DEBUG/GpsLocationProvider(74): Releasing wakelock 10-21 21:53:13.097: DEBUG/dalvikvm(74): GC freed 2562 objects / 104912 bytes in 223ms 10-21 21:53:20.227: DEBUG/dalvikvm(74): GC freed 1345 objects / 51352 bytes in 236ms 10-21 21:53:21.180: DEBUG/GpsLocationProvider(74): ALARM_WAKEUP 10-21 21:53:21.187: DEBUG/GpsLocationProvider(74): startNavigating 10-21 21:53:21.187: DEBUG/libgps(74): qct_gps_set_position_mode = 1, fix_frequency = 10 10-21 21:53:21.187: DEBUG/libgps(74): qct_gps_start 10-21 21:53:21.207: DEBUG/GpsLocationProvider(74): Acquiring wakelock 10-21 21:53:22.147: DEBUG/libgps(74): PDSM_PD_EVENT_GPS_BEGIN 10-21 21:53:24.167: DEBUG/GpsLocationProvider(74): TTFF: 2978 10-21 21:53:27.287: DEBUG/dalvikvm(74): GC freed 1417 objects / 52512 bytes in 232ms 10-21 21:53:34.397: DEBUG/GpsLocationProvider(74): exceeded MIN_FIX_COUNT 10-21 21:53:34.397: DEBUG/GpsLocationProvider(74): stopNavigating (and so forth)
A web research for these logs didn't turn up anything (which is unusual in my experience), so this leads me to post the question here wondering what the root of the problem might be.
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Dec 19, 2009
We see the bigger font for Agree and disagree buttons for the Alert dialog when the network provider is selected in the location settings menu. Any pointers or suggestions which part of the framework code need to take a look. This dialog is controlled by Networklocation.apk which is not open source.
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Sep 11, 2012
I'm working on a project to display a route in a MapView based on current location from GPS Provider. I'm able to draw the path between two points but the problem starts when the location changes to a new point causing the draw path to erase. Basically my Location Listener saves the current Geopoint and sets the new Geopoint location and after that it starts the overlay to draw a path based on those two points. I think an option could be saving the coordinates to a database and then pulling the information from there to draw the path.
private class MyLocationListener implements LocationListener {
public void onLocationChanged(Location location) {
Toast.makeText(getBaseContext(), "Tracking device..",
Toast.LENGTH_SHORT).show();
[code]....
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Aug 8, 2010
While using network provider for location updates, I found that it is the same time that I set on my device. Can it not be that provided by network as it goes when it is GPS. Or if network provider cannot provide time , then atleast location.getTime() should return 0 instead of device time. Is there any way to avoid device time, as I want to distinguish it.
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Aug 20, 2010
I need to fool GMap application on android device by providing my own positioning data. What is the possibility and how shall i go about achieving it?
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Mar 23, 2010
I have some Android code that needs to get the best available location QUICKLY, from GPS, network or whatever is available. Accuracy is less important than speed.
Getting the best available location is surely a really standard task. Yet I can't find any code to demonstrate it. The Android location code expects you to specify criteria, register for updates, and wait - which is fine if you have detailed criteria and don't mind waiting around.
But my app needs to work a bit more like the Maps app does when it first locates you - work from any available provider, and just check the location isn't wildly out of date or null.
I've attempted to roll my own code to do this, but am having problems. (It's inside an IntentService where an upload happens, if that makes any difference. I've included all the code for info.) What's wrong with this code?
CODE:..............
Unfortunately, this finds the network provider, but only ever outputs latlng null 30 times - it never seems to get a location at all. I never even get a log statement of locationChanged.
It's funny, because from ddms I can see output like:
CODE:..............
Seeming to suggest that the network provider does have some location info after all, I'm just not getting at it.
I think working example code would be a useful resource for the Android/StackOverflow community.
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Mar 1, 2010
I am having a hard time understanding content providers. In the notepad example and others, the content provider never even declares its CONTENT_URI anywhere inside itself, yet the docs say to publicly declare this. It's declared in a different class. So when an activity queries a content provider with a CONTENT_URI, how does Android know which one I want. I see no link between a content provider and its CONTENT_URI declared in another class.
I also don't how to think about intents and content providers. I know that you don't call an intent on a content provider. But an activity queries a content provider without an intent, and an activity has a mimetype attribute in the manifest that would seem to tie it to a content provider.
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Mar 11, 2010
how can i create a custom content provider like contact content provider? i know how to create custom content providers but i want to integarte to device such a way that it canbe accessed by all application installed in that device.
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May 20, 2010
Fastest 2D frame rate possible with android NDK, my try included, better options available?
I used the NDK and OpenGL ES 2.0 to display a frame as a texture on a GL_TRIANGLE_STRIP. This was done on a HTC Desire, same hardware as Nexus One. I tried to load multiple GL_RGBA textures and switch between the textures, because the normal fill rate with a single texture was disappointingly low:
CODE:.........................
I think even 30.32 fps RGBA is still too slow.
So is this the way to go to achieve the fastest 2D frame rate (with same quality)?
Any suggestions to speed it up?
Here is the relevant code, it is based on the hello-gl2 NDK example:
CODE:........................
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Jul 15, 2012
I have tried them all, from EZ pdf reader to mantano and no one is working fine. I have an pdf file which is 48 pages and it takes more than 30 minutes for it to load complety. Isn't there any decent pdf readethat is decent and can render and open big pdf files fast?
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Dec 25, 2009
What 's the fastest way to display a bitmap? Now I am using Bitmap.setPixels and ImageView.setImageBitmap all time that this change. It has a refresh of 15 fps. It work good, but I am not sure that is the best method to get best performance. Is better use Canvas.drawBitmap with a SurfaceView ? or opengl ?
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Aug 6, 2010
I've done a search but found nothing. It seems like when I have to force stop an application, it takes me 8-10 button presses to accomplish it (menu-settings-applications-manage applications-sort by size-sort az-find application-scroll down-force stop). It's just not easy. Especially if I'm driving or jogging. Is there a quick and simple way to force stop an application?
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Sep 29, 2010
I have a file that contains about 200,000 long values that I want to read as fast as possible into a long[]. It's for an Android app; function calls are slow (so anything involving reading a long at a time with a "for" loop will be super slow) and I need loading to be fast. What can I use? Everything I look at seems to read only bytes fast.
I've used ByteBuffer and FileChannel from the NIO package before and this seems a really fast way to load arrays of values from files. However, I cannot work out how to use this to read data into a long[]. I've tried wrapping a long[] as a LongBuffer, but I cannot see any way I can feed data from a file into a LongBuffer.
Edit: Whatever method I use, I need to be able to use Arrays.binarySearch on the long[] array at the end.
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Nov 14, 2010
hello, i have a gles based game that takes quite some time to load because of the huge amount of textures.
now i want to display a loading-text or loading-bar as soon as possible as the application is starting up.
what is the fastest way to display a text like this? should i do it in gles as well or should i use an alert or view?
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Aug 5, 2010
There are several apps that a user create various files from an Android (textual documents, audio recordings, photos, links) and store them on a website where they can be accessed later from a desktop computer.
I am looking for a way to do the reverse.
I do a lot of data gathering from my desktop computer. I copy large amounts of text and links and paste them into either a .txt or .rtf file.
What would be a simple method to send a .txt or .rft file from my desktop directly to my SD card AND create a shortcut link for it either on my Android desktop or in system folder somewhere that I can have a desktop shortcut to?
I realize the solution might seem obvious, but while I am using my Android to view Google docs, or Evernote, or Snaptic it is not apparent to me how I can simply pull the document from the web and store it on my phone for quick access.
I have tons of .txt and .rtf files that I would like to permantly store on my SD card, so whatever quick method you know of will be uber helpful.
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Jun 4, 2010
I need to extract information from an unstructured web page in Android. The information I want is embedded in a table that doesn't have an id.
CODE:.....................
Should I use. Pattern Matching? Use BufferedReader to extract the information? Or are there faster way to get that information?
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Dec 26, 2009
I'm making a game for android where I need to draw a lot of points that change position every frame. I use the ndk to get faster processing performance of the math/physics section of the game, so I need to use OpenGL to get the fastest performance. Right now, I make a texture every frame out of an array that holds the colors of every pixel. I am only able to get ~10 frames per second with this method. Is there anyway I could speed this up? ...
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Oct 8, 2010
I think it's a common problem. I'd like to sell my apps, but my country is not supported for merchants already. Do you know a reliable app store where I can sell apps?
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Jul 18, 2010
There are a lot of different classes that can be used in various ways to read/write to files in Android. For example, you can make use of java.nio.ByteBuffer, FileOutputStream and BufferedOutputStream. Are there any general guidelines for what to use to read/write quickly to the SD card? For example, BufferedOutputStream seems as if it should make things faster but I'm unsure the buffer size should be set for. Specifically, I want to read/write byte arrays that are ~1Mb in size as quickly as I can.
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Jan 28, 2010
What is the fastest method to copy a lot of contacts from one Eris to another?
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May 21, 2010
Was updating my apps to back up in TiBa to install SS when I noticed Google Voice updated. From channelog:
Quote:
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