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POProblem with draw() on a MapView ItemizedOverlay
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  1. POProblem with draw() on a MapView ItemizedOverlay
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    copied!<p>I am developing an application for the Parisian Metro. One of the functions is a map where you can click the metro stations and see what are the metro lines, and when are the next 4 trains on this station.</p> <p>I have hence created a <code>MapActivity</code> and an <code>ItemizedOverlay</code> classes.</p> <p>On my device it is working perfectly, but I am getting some logs from the users with a crash, and I really don't understand what's wrong.</p> <p>My map activity adds ONE <code>ItemizedOverlay</code> that displays a blue dot for the current user location. This overlay also listens to onTap, which depending on the coordinates of the tap, will try to find metro stations (for which I know the lat/lon coordinates). This is working perfectly.</p> <p>The stack trace of the crash is:</p> <pre><code>java.lang.NullPointerException at com.google.android.maps.OverlayBundle.draw(OverlayBundle.java:42) at com.google.android.maps.MapView.onDraw(MapView.java:494) at android.view.View.draw(View.java:6535) at android.view.ViewGroup.drawChild(ViewGroup.java:1531) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1258) at android.view.ViewGroup.drawChild(ViewGroup.java:1529) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1258) at android.view.View.draw(View.java:6538) at android.widget.FrameLayout.draw(FrameLayout.java:352) at android.view.ViewGroup.drawChild(ViewGroup.java:1531) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1258) at android.view.View.draw(View.java:6538) at android.widget.FrameLayout.draw(FrameLayout.java:352) at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1830) at android.view.ViewRoot.draw(ViewRoot.java:1349) at android.view.ViewRoot.performTraversals(ViewRoot.java:1114) at android.view.ViewRoot.handleMessage(ViewRoot.java:1633) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:123) at android.app.ActivityThread.main(ActivityThread.java:4363) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:521) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) at dalvik.system.NativeStart.main(Native Method) </code></pre> <p>Sometimes it comes from different lines but it always finishes crashing at <code>OverlayBunde.java:42</code></p> <p>As is does not mention my code, I don't know what's wrong.</p> <p>You can get the source code of the <code>MapActivity</code> and the the <code>ItemizedOverlay</code>: <a href="http://code.google.com/p/metroparis/source/browse/trunk/src/org/bicou/metro/" rel="nofollow noreferrer">http://code.google.com/p/metroparis/source/browse/trunk/src/org/bicou/metro/</a></p> <p>The activity class is <code>ACarteStations</code> and the overlay class is <code>StationMetroMapOverlay</code>.</p> <p>I am sorry that the code is in French. I will translate it eventually :) If you need translations about the variable names, just let me know.</p> <p>Hope you can help me!!</p>
 

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