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POCreating and adding Markers to a Google Map
 

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  1. POCreating and adding Markers to a Google Map
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    <p>Adding a Google Map to my android app. Trying to create a new Marker and add it to the map and also to a list of Markers:</p> <pre><code>public void createMarkersFromList(){ for(int i = 0; i &lt; buildingList.size(); i++){ double lat = Double.parseDouble(buildingList.get(i).getLatitude()); double lng = Double.parseDouble(buildingList.get(i).getLongitude()); LatLng position = new LatLng(lat, lng); String name = buildingList.get(i).getName(); Marker m = fm.getMap().addMarker(new MarkerOptions() .position(position) .title(name)); markers.add(m); } } </code></pre> <p>But, I'm getting a NullPointerException error in the log and the app is crashing. What am I doing wrong?</p> <pre><code>11-24 23:13:51.171: E/dalvikvm(12071): The following issues were seen: 11-24 23:13:51.861: E/AndroidRuntime(12071): FATAL EXCEPTION: main 11-24 23:13:51.861: E/AndroidRuntime(12071): java.lang.NullPointerException: null reference 11-24 23:13:51.861: E/AndroidRuntime(12071): at com.google.android.gms.internal.dm.e(Unknown Source) 11-24 23:13:51.861: E/AndroidRuntime(12071): at com.google.android.gms.maps.model.Marker.&lt;init&gt;(Unknown Source) 11-24 23:13:51.861: E/AndroidRuntime(12071): at com.example.uva_poops.ViewMap.createMarkersFromList(ViewMap.java:124) 11-24 23:13:51.861: E/AndroidRuntime(12071): at com.example.uva_poops.ViewMap$GetBuildingList.onPostExecute(ViewMap.java:114) 11-24 23:13:51.861: E/AndroidRuntime(12071): at com.example.uva_poops.ViewMap$GetBuildingList.onPostExecute(ViewMap.java:1) 11-24 23:13:51.861: E/AndroidRuntime(12071): at android.os.AsyncTask.finish(AsyncTask.java:631) 11-24 23:13:51.861: E/AndroidRuntime(12071): at android.os.AsyncTask.access$600(AsyncTask.java:177) 11-24 23:13:51.861: E/AndroidRuntime(12071): at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:644) 11-24 23:13:51.861: E/AndroidRuntime(12071): at android.os.Handler.dispatchMessage(Handler.java:99) 11-24 23:13:51.861: E/AndroidRuntime(12071): at android.os.Looper.loop(Looper.java:176) 11-24 23:13:51.861: E/AndroidRuntime(12071): at android.app.ActivityThread.main(ActivityThread.java:5279) 11-24 23:13:51.861: E/AndroidRuntime(12071): at java.lang.reflect.Method.invokeNative(Native Method) 11-24 23:13:51.861: E/AndroidRuntime(12071): at java.lang.reflect.Method.invoke(Method.java:511) 11-24 23:13:51.861: E/AndroidRuntime(12071): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102) 11-24 23:13:51.861: E/AndroidRuntime(12071): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869) 11-24 23:13:51.861: E/AndroidRuntime(12071): at dalvik.system.NativeStart.main(Native Method) </code></pre>
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    1. PTQuestion
    1. USthanksd
    1. USthanksd
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    1. COCan you post more code that you made and your logcat please.
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    2. COyessir added more info
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    3. COFollow [this][1] for adding and removing marker from the map [1]: http://stackoverflow.com/questions/13692398/remove-a-marker-from-a-googlemap
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      1. POCreating and adding Markers to a Google Map
      1. USShylendra Madda
 

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