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POGoogle Maps hashmap with LatLng
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  1. POGoogle Maps hashmap with LatLng
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    copied!<p>I have created one simple class which called MapMarker and it is the following: <br/></p> <pre><code>public class MapMarker { private long id; private String resName; public MapMarker(){} public MapMarker(long id, String resName){ this.id = id; this.resName = resName; } public long getId(){ return id; } public String getResName(){ return resName; } } </code></pre> <p>while i am adding the markers in the google map i also create a HashMap in order when a infowindow is clicked i can start an activity with some parameters. The code i am using is the following for adding the markers and initilize the hashmap<br/></p> <pre><code>private HashMap&lt;LatLng, MapMarker&gt; mapMarkersData = new HashMap&lt;LatLng, MapMarker&gt;(); markerCoords = new LatLng(lat, lng); mapMarkersData.put(markerCoords, new MapMarker(markerId, markerRes)); map.addMarker(new MarkerOptions().position(markerCoords).title(title).snippet("Click to see more info!")); </code></pre> <p>when i try to get the value from the hashmap i get a nullpointerexception. The code i am using is the following. <br/></p> <pre><code>line 360: markerId = mapMarkersData.get(marker.getPosition()).getId(); markerResName = mapMarkersData.get(marker.getPosition()).getResName(); </code></pre> <p>What is going wrong?</p> <p>Edit:<br/> the logcat is the following: <br/></p> <pre><code>02-23 20:37:55.780: E/AndroidRuntime(4853): FATAL EXCEPTION: main 02-23 20:37:55.780: E/AndroidRuntime(4853): java.lang.NullPointerException 02-23 20:37:55.780: E/AndroidRuntime(4853): at .MapActivity.onInfoWindowClick (MapActivity.java:360) 02-23 20:37:55.780: E/AndroidRuntime(4853): at .GoogleMap$8.h(Unknown Source) 02-23 20:37:55.780: E/AndroidRuntime(4853): at com.google.android.gms.internal.u$a.onTransact(Unknown Source) 02-23 20:37:55.780: E/AndroidRuntime(4853): at android.os.Binder.transact(Binder.java:279) 02-23 20:37:55.780: E/AndroidRuntime(4853): at com.google.android.gms.maps.internal.IOnInfoWindowClickListener$Stub$Proxy.onInfoWindowClick(IOnInfoWindowClickListener.java:82) 02-23 20:37:55.780: E/AndroidRuntime(4853): at maps.y.bw.a(Unknown Source) 02-23 20:37:55.780: E/AndroidRuntime(4853): at maps.a.y.f(Unknown Source) 02-23 20:37:55.780: E/AndroidRuntime(4853): at maps.a.y.a(Unknown Source) 02-23 20:37:55.780: E/AndroidRuntime(4853): at maps.a.bd.c(Unknown Source) 02-23 20:37:55.780: E/AndroidRuntime(4853): at maps.a.dq.onSingleTapConfirmed(Unknown Source) 02-23 20:37:55.780: E/AndroidRuntime(4853): at maps.e.v.onSingleTapConfirmed(Unknown Source) 02-23 20:37:55.780: E/AndroidRuntime(4853): at maps.e.j.handleMessage(Unknown Source) 02-23 20:37:55.780: E/AndroidRuntime(4853): at android.os.Handler.dispatchMessage(Handler.java:99) 02-23 20:37:55.780: E/AndroidRuntime(4853): at android.os.Looper.loop(Looper.java:130) 02-23 20:37:55.780: E/AndroidRuntime(4853): at android.app.ActivityThread.main(ActivityThread.java:3691) 02-23 20:37:55.780: E/AndroidRuntime(4853): at java.lang.reflect.Method.invokeNative(Native Method) 02-23 20:37:55.780: E/AndroidRuntime(4853): at java.lang.reflect.Method.invoke(Method.java:507) 02-23 20:37:55.780: E/AndroidRuntime(4853): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:912) 02-23 20:37:55.780: E/AndroidRuntime(4853): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:670) 02-23 20:37:55.780: E/AndroidRuntime(4853): at dalvik.system.NativeStart.main(Native Method) </code></pre> <p>Sorry one last edit has been made.</p>
 

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