Thank you guys for your prompt answer!
I just modified the previous code into the following and it works, indeed
it gives me the latitude value on my phone and
I need to precise not using the emulator (here it still give me an
exception, I guess this normal since we dont have a gps in the emulator).
but my problem now is that why it does not work on my phone, when I use
GPS_PROVIDER, though my gps is enabled on phone ?!?!!
-- the new code that works is :
mLocationManager = (LocationManager)
getSystemService(Context.LOCATION_SERVICE);
/* Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setPowerRequirement(Criteria.POWER_LOW); */
String locationprovider =
mLocationManager.NETWORK_PROVIDER;//getBestProvider(criteria, true);
Location mLocation =
mLocationManager.getLastKnownLocation(locationprovider);
String text = "latitude :" + mLocation.getLatitude();
// String text = "Last location lat: " + mLocation.getLatitude()
//+ "long: " + mLocation.getLongitude();
//+ "speed :" + mLocation.getSpeed() +
// "Time: " + mLocation.getTime();
tv.setText(text);
---------------------------------------------------------------
Thnk you very much,
-- aek
On Saturday, September 29, 2012 12:03:51 AM UTC+1, aek wrote:
>
>
> Hi there,
>
> I am tryin to run a simple code to illustrate the geolocation service.
> Unfortunately I am having an unexpected exception that unable
> to execute the activity.
>
> any help!
>
> thank you in advance
> ------------------------------------ simple pg for geolocalisation
>
> package com.example.lastlocation;
>
> import android.location.Criteria;
> import android.location.Location;
> import android.location.LocationManager;
> import android.os.Bundle;
> import android.app.Activity;
> import android.content.Context;
> import android.view.Menu;
> import android.widget.TextView;
>
> public class MyLocation extends Activity {
>
> TextView tv;
> LocationManager mLocationManager;
>
> @Override
> public void onCreate(Bundle savedInstanceState) {
> super.onCreate(savedInstanceState);
> setContentView(R.layout.main);
>
> tv = (TextView) findViewById(R.id.textview1);
>
> mLocationManager = (LocationManager)
> getSystemService(Context.LOCATION_SERVICE);
>
>
> Criteria criteria = new Criteria();
> criteria.setAccuracy(Criteria.ACCURACY_FINE);
> criteria.setPowerRequirement(Criteria.POWER_LOW);
>
> String locationprovider =
> mLocationManager.getBestProvider(criteria, true);
>
> Location mLocation =
> mLocationManager.getLastKnownLocation(locationprovider);
>
> String text = "Last location lat: " + mLocation.getLatitude()
> + "long: " + mLocation.getLongitude();
> //+ "speed :" + mLocation.getSpeed() +
> // "Time: " + mLocation.getTime();
>
> tv.setText(text);
>
> }
>
> @Override
> public boolean onCreateOptionsMenu(Menu menu) {
> getMenuInflater().inflate(R.menu.main, menu);
> return true;
> }
> }
>
> _________________
>
>
>
>
> ----------------------
> 09-28 22:10:32.784: D/AndroidRuntime(969): Shutting down VM
> 09-28 22:10:32.784: W/dalvikvm(969): threadid=1: thread exiting with
> uncaught exception (group=0x4001d800)
> 09-28 22:10:32.804: E/AndroidRuntime(969): FATAL EXCEPTION: main
> 09-28 22:10:32.804: E/AndroidRuntime(969): java.lang.RuntimeException:
> Unable to start activity
> ComponentInfo{com.example.lastlocation/com.example.lastlocation.MyLocation}:
> java.lang.NullPointerException
> 09-28 22:10:32.804: E/AndroidRuntime(969): at
> android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
> 09-28 22:10:32.804: E/AndroidRuntime(969): at
> android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
> 09-28 22:10:32.804: E/AndroidRuntime(969): at
> android.app.ActivityThread.access$2300(ActivityThread.java:125)
> 09-28 22:10:32.804: E/AndroidRuntime(969): at
> android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
> 09-28 22:10:32.804: E/AndroidRuntime(969): at
> android.os.Handler.dispatchMessage(Handler.java:99)
> 09-28 22:10:32.804: E/AndroidRuntime(969): at
> android.os.Looper.loop(Looper.java:123)
> 09-28 22:10:32.804: E/AndroidRuntime(969): at
> android.app.ActivityThread.main(ActivityThread.java:4627)
> 09-28 22:10:32.804: E/AndroidRuntime(969): at
> java.lang.reflect.Method.invokeNative(Native Method)
> 09-28 22:10:32.804: E/AndroidRuntime(969): at
> java.lang.reflect.Method.invoke(Method.java:521)
> 09-28 22:10:32.804: E/AndroidRuntime(969): at
> com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
> 09-28 22:10:32.804: E/AndroidRuntime(969): at
> com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
> 09-28 22:10:32.804: E/AndroidRuntime(969): at
> dalvik.system.NativeStart.main(Native Method)
> 09-28 22:10:32.804: E/AndroidRuntime(969): Caused by:
> java.lang.NullPointerException
> 09-28 22:10:32.804: E/AndroidRuntime(969): at
> com.example.lastlocation.MyLocation.onCreate(MyLocation.java:35)
> 09-28 22:10:32.804: E/AndroidRuntime(969): at
> android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
> 09-28 22:10:32.804: E/AndroidRuntime(969): at
> android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
> 09-28 22:10:32.804: E/AndroidRuntime(969): ... 11 more
>
>
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