title: Android interface becomes null
body: <p>I have a problem with an interface. I init the interface in an activity: <code>map.setFloorInterface(this);</code> 
  <hr/>
  This is the method itself:</p>
  
  <pre><code>public void floorChanged(View view, int floorId) {
      map = (MapView) view.inflate(getActivity(), R.layout.map, tView);
      map.setFloorInterface(this);
  }
  </code></pre>
  
  <p>I'm trying to reset the interface because it's null the second time. The interface is called from a library I made, and is fired when I press a button. 
  <hr/>
  Anyone has a clue why the interface does work the first time, but is null the second time?</p>
  
  <p>Error log:</p>
  
  <pre><code>07-05 16:34:55.273: E/AndroidRuntime(10288): FATAL EXCEPTION: main
  07-05 16:34:55.273: E/AndroidRuntime(10288): java.lang.NullPointerException
  07-05 16:34:55.273: E/AndroidRuntime(10288):    at com.labela.blicks.Map$4.onClick(TiledScrollView.java:108)
  07-05 16:34:55.273: E/AndroidRuntime(10288):    at android.view.View.performClick(View.java:2538)
  07-05 16:34:55.273: E/AndroidRuntime(10288):    at android.view.View$PerformClick.run(View.java:9152)
  07-05 16:34:55.273: E/AndroidRuntime(10288):    at android.os.Handler.handleCallback(Handler.java:587)
  07-05 16:34:55.273: E/AndroidRuntime(10288):    at android.os.Handler.dispatchMessage(Handler.java:92)
  07-05 16:34:55.273: E/AndroidRuntime(10288):    at android.os.Looper.loop(Looper.java:130)
  07-05 16:34:55.273: E/AndroidRuntime(10288):    at android.app.ActivityThread.main(ActivityThread.java:3687)
  07-05 16:34:55.273: E/AndroidRuntime(10288):    at java.lang.reflect.Method.invokeNative(Native Method)
  07-05 16:34:55.273: E/AndroidRuntime(10288):    at java.lang.reflect.Method.invoke(Method.java:507)
  07-05 16:34:55.273: E/AndroidRuntime(10288):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
  07-05 16:34:55.273: E/AndroidRuntime(10288):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
  07-05 16:34:55.273: E/AndroidRuntime(10288):    at dalvik.system.NativeStart.main(Native Method)
  </code></pre>
  
  <p>Thanx in advance!</p>