title: Android trying to display GPS getTime() result is crashing the app
body: <p>I'm building an Android app using GPS localization, and for that purpose I need first to display localization parameters like speed, time of last fix, deltatime, distance, an so on. No problem with speed, but as soon as I try to display the getTime(0) result in the textView, the app crashes right after getting the first GPS fix.
  I don't know how to get the stack view as I'm testing the app directly on my phone, on real GPS signal. I had hard time configuring the journey simulation via GPX data file (the emulator keeps restarting when I'm trying to simulate the GPS signal), so I went directly to work on the real phone.</p>
  
  <p>Here are the key elements for the problem :</p>
  
  <pre><code>public void displayText(Integer input, double t1, double t0, int signal, int counter) {
   tv.setText(String.valueOf(input));
   t1tv.setText("t1 : "+String.valueOf(t1));
   t0tv.setText("t0 : "+String.valueOf(t0));      
   signaltv.setText("Signal : "+signal);
   countertv.setText("Counter : "+counter);       
  }
  
  private class MyLocationListener implements LocationListener {
  Integer counter = 0;
  
  public void onLocationChanged(Location loc) {   
   if (loc != null) {
    Integer fix=0;
    Double speed = 0.0;
  
   if (loc.hasSpeed()) {
    speed = loc.getSpeed() * 1.0; 
    fix=2;
    speed = speed * 3.6d;
    displayText(speed.intValue(), loc.getTime(), 0.0, fix, counter);   
  //having the "loc.getTime()" sent to the displayText method is making the app crash.                
                  }
    else {
       try {
  // Here I have some other code, but it's irrelevant for the occasion as not used when the app chrashes.        } 
                  catch (NullPointerException e) {
                  }
              }                
              counter = (counter + 1) % data_points;
          }
  }
  </code></pre>
  
  <p>Nothing too complicated I assume, but I'm quite new to programming in Java (been working years on Pascal/Delphi programming), and I kindly asking you for any help.</p>
  
  <p>UPDATE :
  I changed the function to getElapsedRealtimeNanos(), changed min API to 17, swapped to another VM and managed to run the GPS emulation, and still the app crashes, but now at least I have some trace :</p>
  
  <pre><code>02-21 07:57:08.942: W/dalvikvm(1131): threadid=1: thread exiting with uncaught exception (group=0xb1a53ba8)
  02-21 07:57:08.982: E/AndroidRuntime(1131): FATAL EXCEPTION: main
  02-21 07:57:08.982: E/AndroidRuntime(1131): Process: com.the314.td, PID: 1131
  02-21 07:57:08.982: E/AndroidRuntime(1131): java.lang.NullPointerException
  02-21 07:57:08.982: E/AndroidRuntime(1131):     at com.the314.td.testdrive$MyLocationListener.onLocationChanged(testdrive.java:308)
  02-21 07:57:08.982: E/AndroidRuntime(1131):     at android.location.LocationManager$ListenerTransport._handleMessage(LocationManager.java:279)
  02-21 07:57:08.982: E/AndroidRuntime(1131):     at android.location.LocationManager$ListenerTransport.access$000(LocationManager.java:208)
  02-21 07:57:08.982: E/AndroidRuntime(1131):     at android.location.LocationManager$ListenerTransport$1.handleMessage(LocationManager.java:224)
  02-21 07:57:08.982: E/AndroidRuntime(1131):     at android.os.Handler.dispatchMessage(Handler.java:102)
  02-21 07:57:08.982: E/AndroidRuntime(1131):     at android.os.Looper.loop(Looper.java:136)
  02-21 07:57:08.982: E/AndroidRuntime(1131):     at android.app.ActivityThread.main(ActivityThread.java:5017)
  02-21 07:57:08.982: E/AndroidRuntime(1131):     at java.lang.reflect.Method.invokeNative(Native Method)
  02-21 07:57:08.982: E/AndroidRuntime(1131):     at java.lang.reflect.Method.invoke(Method.java:515)
  02-21 07:57:08.982: E/AndroidRuntime(1131):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
  02-21 07:57:08.982: E/AndroidRuntime(1131):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
  02-21 07:57:08.982: E/AndroidRuntime(1131):     at dalvik.system.NativeStart.main(Native Method)
  02-21 07:57:17.652: I/Process(1131): Sending signal. PID: 1131 SIG: 9
  </code></pre>