Own GPS-Location

shiteiru · by **shiteiru** » Tue May 20, 2008 7:21 pm

Atm i'm kinda frustrated. I tried many different things looked many tutorials over and over, but i just can't get it to work...

Here's the code im talkin about. I probably got something wrong, but i just can't find what it is.

Everytime i start my app i get a nullPointer Exception

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Using java Syntax Highlighting

 
                this.myLocationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
 
                this.myLocation = this.myLocationManager.getCurrentLocation("gps");
 
                 Double lat = TrackerActivity.this.myLocation.getLatitude() * 1E6;
 
                 Double lng = TrackerActivity.this.myLocation.getLongitude() * 1E6;
 
                 MapPoint mp = new MapPoint(lat.intValue(), lng.intValue());
 
Parsed in 0.032 seconds,  using GeSHi 1.0.8.4

maybe someone can help me out on this...

plusminus · by **plusminus** » Tue May 20, 2008 7:24 pm

Hello shiteiru,

did you add the permissions you need to the AndroidManifest.xml also check the LogCat if it prints something about Permission-Issues.

Permissions in AndroidManifest.xml should look similar to these:

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Using xml Syntax Highlighting

<?xml version="1.0" encoding="utf-8"?>
 
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
 
    package="your.package.structure">
 
    <uses-permission android:name="android.permission.ACCESS_LOCATION"/>
 
    <uses-permission android:name="android.permission.ACCESS_GPS"/>
 
    <application android:icon="@drawable/icon">
 
...
Parsed in 0.001 seconds,  using GeSHi 1.0.8.4

Regards,
plusminus

shiteiru · by **shiteiru** » Tue May 20, 2008 7:55 pm

whoohooooo

it works!!!

a big thanks for this plusminus !!!

plusminus · by **plusminus** » Thu May 22, 2008 11:19 am

No problem

alex2308 · by **alex2308** » Wed Jun 18, 2008 3:37 pm

im having some similar problems, too. i get nullpointer exceptions when reading latitude - ONLY when reading latitude. longitude works fine, so does altitude. veeery strange behavior. am i missing some permissions?

i did add "android.permission.ACCESS_LOCATION" and "android.permission.ACCESS_ASSISTED_GPS" using eclipse IDE.

Syntax: [ Download ] [ Hide ]

Using java Syntax Highlighting

 
                Log.i("MapView", "calling locationmanager");
 
                LocationManager lManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
 
                String pos;
 
                Location l;
 
                Log.i("MapView", "reading location");
 
                l = lManager.getCurrentLocation("agps");
 
                try {
 
                        Log.i("MapView", "Longitude: " +l.getLongitude());
 
                        Log.i("MapView", "Altitude: " + l.getAltitude());
 
                        Log.i("MapView", "Latitude: " + (int)l.getLatitude()); // ERROR HERE
 
                }
 
                catch (NullPointerException e) {
 
                        Log.e("MapView", "Great...error maybe ACCESS_LOCATION not given");
 
                }
 
Parsed in 0.034 seconds,  using GeSHi 1.0.8.4

Own GPS-Location

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