[android-developers] Re: Null Pointer exception in Location Manager

[Gold]

Hi..Sorry,


   Herewith I attached Logcat trace..!


09-29 02:09:42.266: DEBUG/AndroidRuntime(2979): >>
AndroidRuntime START <<
09-29 02:09:42.276: DEBUG/AndroidRuntime(2979): CheckJNI is ON
09-29 02:09:42.536: DEBUG/AndroidRuntime(2979): --- registering native
functions ---
09-29 02:09:43.456: DEBUG/AndroidRuntime(2979): Shutting down VM
09-29 02:09:43.456: DEBUG/dalvikvm(2979): Debugger has detached;
object registry had 1 entries
09-29 02:09:43.486: INFO/AndroidRuntime(2979): NOTE: attach of thread
'Binder Thread #3' failed
09-29 02:09:44.056: DEBUG/AndroidRuntime(2987): >>
AndroidRuntime START <<
09-29 02:09:44.056: DEBUG/AndroidRuntime(2987): CheckJNI is ON
09-29 02:09:44.286: DEBUG/AndroidRuntime(2987): --- registering native
functions ---
09-29 02:09:45.306: INFO/ActivityManager(59): Starting activity:
Intent { act=android.intent.action.MAIN
cat=[android.intent.category.LAUNCHER] flg=0x1000
cmp=com.sample.test/.Starter }
09-29 02:09:45.476: DEBUG/AndroidRuntime(2987): Shutting down VM
09-29 02:09:45.526: DEBUG/dalvikvm(2987): Debugger has detached;
object registry had 1 entries
09-29 02:09:45.606: INFO/AndroidRuntime(2987): NOTE: attach of thread
'Binder Thread #3' failed
09-29 02:09:45.616: INFO/ActivityManager(59): Start proc
com.sample.test for activity com.sample.test/.Starter: pid=2995
uid=10040 gids={3003}
09-29 02:09:46.466: INFO/ActivityManager(59): Starting activity:
Intent { cmp=com.sample.test/.Home }
09-29 02:09:46.596: WARN/GpsLocationProvider(59): Duplicate add
listener for uid 10040
09-29 02:09:46.606: DEBUG/AndroidRuntime(2995): Shutting down VM
09-29 02:09:46.606: WARN/dalvikvm(2995): threadid=1: thread exiting
with uncaught exception (group=0x4001d800)
09-29 02:09:46.636: ERROR/AndroidRuntime(2995): FATAL EXCEPTION: main
09-29 02:09:46.636: ERROR/AndroidRuntime(2995):
java.lang.RuntimeException: Unable to start activity
ComponentInfo{com.sample.test/com.sample.test.Home}:
java.lang.NullPointerException
09-29 02:09:46.636: ERROR/AndroidRuntime(2995): at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:
2663)
09-29 02:09:46.636: ERROR/AndroidRuntime(2995): at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:
2679)
09-29 02:09:46.636: ERROR/AndroidRuntime(2995): at
android.app.ActivityThread.access$2300(ActivityThread.java:125)
09-29 02:09:46.636: ERROR/AndroidRuntime(2995): at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
09-29 02:09:46.636: ERROR/AndroidRuntime(2995): at
android.os.Handler.dispatchMessage(Handler.java:99)
09-29 02:09:46.636: ERROR/AndroidRuntime(2995): at
android.os.Looper.loop(Looper.java:123)
09-29 02:09:46.636: ERROR/AndroidRuntime(2995): at
android.app.ActivityThread.main(ActivityThread.java:4627)
09-29 02:09:46.636: ERROR/AndroidRuntime(2995): at
java.lang.reflect.Method.invokeNative(Native Method)
09-29 02:09:46.636: ERROR/AndroidRuntime(2995): at
java.lang.reflect.Method.invoke(Method.java:521)
09-29 02:09:46.636: ERROR/AndroidRuntime(2995): at
com.android.internal.os.ZygoteInit
$MethodAndArgsCaller.run(ZygoteInit.java:868)
09-29 02:09:46.636: ERROR/AndroidRuntime(2995): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
09-29 02:09:46.636: ERROR/AndroidRuntime(2995): at
dalvik.system.NativeStart.main(Native Method)
09-29 02:09:46.636: ERROR/AndroidRuntime(2995): Caused by:
java.lang.NullPointerException
09-29 02:09:46.636: ERROR/AndroidRuntime(2995): at
com.sample.test.Home.onCreate(Home.java:38)
09-29 02:09:46.636: ERROR/AndroidRuntime(2995): at
android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:
1047)
09-29 02:09:46.636: ERROR/AndroidRuntime(2995): at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:
2627)
09-29 02:09:46.636: ERROR/AndroidRuntime(2995): ... 11 more
09-29 02:09:46.646: WARN/ActivityManager(59):   Force finishing
activity com.sample.test/.Home
09-29 02:09:47.156: WARN/ActivityManager(59): Activity pause timeout
for HistoryRecord{44095e38 com.sample.test/.Home}
09-29 02:09:57.664: WARN/ActivityManager(59): Activity destroy timeout
for HistoryRecord{44089b28 com.sample.test/.Starter}
09-29 02:09:57.675: WARN/ActivityManager(59): Activity destroy timeout
for HistoryRecord{44095e38 com.sample.test/.Home}
09-29 02:10:01.025: INFO/Process(2995): Sending signal. PID: 2995 SIG:
9
09-29 02:10:01.045: INFO/ActivityManager(59): Process com.sample.test
(pid 2995) has died.
09-29 02:10:01.045: WARN/GpsLocationProvider(59): Unneeded remove
listener for uid 1000
09-29 02:10:01.105: WARN/InputManagerService(59): Window already
focused, ignoring focus gain of:
com.android.internal.view.iinputmethodclient$stub$pr...@43f49530


On Sep 29, 1:36 am, TreKing  wrote:
> On Tue, Sep 28, 2010 at 3:33 PM, Gold  wrote:
> > I tried but it will show Null pointer exception.
>
> Where? What's the stack trace?
>
> --

[android-developers] Re: Null Pointer exception in Location Manager

[Gold]

Hi..

   While clicking the button1 that is
  redbtn.setOnClickListener(new
OnClickListener()
{

@Override
public void onClick(View v)
{

Toast.makeText(getBaseContext(),
"Latitude :" +
latitude.toString(), Toast.LENGTH_SHORT).
show();
}
});

Here it will show the exception


On Sep 29, 1:45 am, TreKing  wrote:
> On Tue, Sep 28, 2010 at 3:41 PM, Gold  wrote:
> > 09-29 02:09:46.636: ERROR/AndroidRuntime(2995): Caused by:
> > java.lang.NullPointerException
> > 09-29 02:09:46.636: ERROR/AndroidRuntime(2995):     at
> > com.sample.test.Home.onCreate(Home.java:38)
>
> Now which part of your code is at line 38?
>
> -
> TreKing  - Chicago
> transit tracking app for Android-powered devices

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[android-developers] Re: Null Pointer exception in Location Manager

[Gold]

Hi,,

 If i click redbutton I need to display latitude
 if i click greenbutton i need to display longitude

How can i did that..! please give any solution..!


On Sep 29, 1:44 am, Kostya Vasilyev  wrote:
> Your code doesn't seem to assign any values to redbtn and greenbtn.
>
> Then you call methods on these objects - perhaps they are still Null at that
> point?
>
> --
> Kostya Vasilyev --http://kmansoft.wordpress.com
>
> 29.09.2010 0:34 пользователь "Gold"  написал:
>
> Hi..All,
>
>                    I need to disply  current Position latitude and
> logintude .. I tried but it will show Null pointer exception.. here
> with i attached my code... please help me to solve this problem..
> I run this application on android emulator
>
> import android.app.Activity;
> import android.app.Dialog;
> import android.content.Context;
> import android.location.Location;
> import android.location.LocationListener;
> import android.location.LocationManager;
> import android.location.LocationProvider;
> import android.os.Bundle;
> import android.view.View;
> import android.view.View.OnClickListener;
> import android.widget.Button;
> import android.widget.Toast;
>
> public class Home extends Activity
> {
>        private Button btn1;
>        private Button btn2;
>        private Button btn3;
>        private LocationListener myLocationListener;
>        private LocationManager myLocationManager;
>        public String latitude;
>        public String longitude;
>
>        /** Called when the activity is first created. */
>   �...@override
>    public void onCreate(Bundle savedInstanceState)
>    {
>        super.onCreate(savedInstanceState);
>        setContentView(R.layout.home);
>
>        myLocationManager =
> (LocationManager)getSystemService(Context.LOCATION_SERVICE);
>        myLocationListener = new MyLocationListener();
>
> myLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
> 1, 1, myLocationListener);
>
> latitude=String.valueOf(myLocationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER).getLatitude());
>                longitude =
> String.valueOf(myLocationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER).getLongitude());
>
>                btn1= (Button)findViewById(R.id.btn1);
>                btn2= (Button)findViewById(R.id.btn2);
>                btn3= (Button)findViewById(R.id.btn3);
>
>                redbtn.setOnClickListener(new OnClickListener()
>                {
>
>                       �...@override
>                        public void onClick(View v)
>                        {
>
>                                Toast.makeText(getBaseContext(), "Latitude :"
> +
> latitude.toString(), Toast.LENGTH_SHORT).show();
>                        }
>                });
>
>                greenBtn.setOnClickListener(new OnClickListener()
>                {
>
>                       �...@override
>                        public void onClick(View v) {
>                                // TODO Auto-generated method stub
>                                Toast.makeText(getBaseContext(), "Longitude:"
> +
> longitude.toString(), Toast.LENGTH_SHORT).show();
>                        }
>                });
>
>                cancelBtn.setOnClickListener(new OnClickListener() {
>
>                       �...@override
>                        public void onClick(View v)
>                        {
>                                // TODO Auto-generated method stub
>                                Toast.makeText(Home.this, "NO gps",
> Toast.LENGTH_SHORT).show();
>
>                        }
>                });
>
>        }
>
>         public class MyLocationListener implements LocationListener
>         {
>                        public void onLocationChanged(Location argLocation)
>                        {
>                                if(argLocation != null)
>                                {
>                                        latitude =
> String.valueOf(argLocation.getLatitude());
>                            longitude =
> String.valueOf(argLocation.getLongitude());
>                        }
>                        }
>                    public void onProviderDisabled(String provider)
>                    {
>                    }
>                public void onProviderEnabled(String provider)
>                {
>                }
>
>                    public void onStatusChanged(String provider, int status,
> Bundle
> arg2)
>                    {
>                    }
>
>        };
>
> }
>
> Thanks & Warm Regards,
> gold
>
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[android-developers] Re: Null Pointer exception in Location Manager

[TreKing]

On Tue, Sep 28, 2010 at 4:09 PM, Gold  wrote:

> hi..
>
> No ,  still i am checking, Now while loading home
> screen itself thorw the error
> "The application stopped unexpectly" in log also i get same error null
> pointer exception
>
>
> thanks & warm regards,
> gold
>


A) Please respond to the group
B) Again, use your debugger to step through your code around where it's
throwing the exception. This should tell you EXACTLY what's null. The rest
of us are not going to be able to debug your program for you like this.

-
TreKing  - Chicago
transit tracking app for Android-powered devices

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[android-developers] Re: Null Pointer exception in Location Manager

[Gold]

Hi,,


 Finally i got the solution..!

The mistakes are 1) I am not assign port to telnet
  2) Add uses permission for
mock location..now i got latitude..



Thanks & Warm Regards,
Gold

On Sep 29, 2:11 am, TreKing  wrote:
> On Tue, Sep 28, 2010 at 4:09 PM, Gold  wrote:
> > hi..
>
> > No ,  still i am checking, Now while loading home
> > screen itself thorw the error
> > "The application stopped unexpectly" in log also i get same error null
> > pointer exception
>
> > thanks & warm regards,
> > gold
>
> A) Please respond to the group
> B) Again, use your debugger to step through your code around where it's
> throwing the exception. This should tell you EXACTLY what's null. The rest
> of us are not going to be able to debug your program for you like this.
>
> -
> TreKing  - Chicago
> transit tracking app for Android-powered devices

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Re: [android-developers] Re: Null Pointer exception in Location Manager

[TreKing]

On Tue, Sep 28, 2010 at 3:41 PM, Gold  wrote:

> 09-29 02:09:46.636: ERROR/AndroidRuntime(2995): Caused by:
> java.lang.NullPointerException
> 09-29 02:09:46.636: ERROR/AndroidRuntime(2995): at
> com.sample.test.Home.onCreate(Home.java:38)
>

Now which part of your code is at line 38?

-
TreKing  - Chicago
transit tracking app for Android-powered devices

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Re: [android-developers] Re: Null Pointer exception in Location Manager

[TreKing]

On Tue, Sep 28, 2010 at 3:49 PM, Gold  wrote:

> While clicking the button1 that is


Step through the debugger through this point and inspect the values of your
variables in the click listener. This will tell you exactly what's null in
there.

-
TreKing  - Chicago
transit tracking app for Android-powered devices

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Re: [android-developers] Re: Null Pointer exception in Location Manager

[TreKing]

On Tue, Sep 28, 2010 at 4:00 PM, Gold  wrote:

>  If i click redbutton I need to display latitude
> if i click greenbutton i need to display longitude
>

OK. Does this mean you fixed your null pointer problem?


>  How can i did that..! please give any solution..!
>

Do what? Solution to what? Clicking buttons? Getting lat / long? Displaying
to where? On a map? On the screen? On a button? In the logs?

-
TreKing  - Chicago
transit tracking app for Android-powered devices

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