MapContainer usage error

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Rubén V

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Jan 27, 2021, 3:02:21 PM1/27/21

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Hi,

In my app I show on a map the current position of the user who operates the device.

The map is in a Singleton form and successfully shows the pin on the map, but when I scroll the map it shows the error message: "An internal application error occurred: java.Util.CurrentModificationException".

On the console it displays the following message:

java.util.ConcurrentModificationException

at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:907)

at java.util.ArrayList$Itr.next(ArrayList.java:857)

at com.codename1.googlemaps.MapLayout$1.run(MapLayout.java:320)

at com.codename1.ui.Display.processSerialCalls(Display.java:1338)

at com.codename1.ui.Display.edtLoopImpl(Display.java:1280)

at com.codename1.ui.Display.mainEDTLoop(Display.java:1162)

at com.codename1.ui.RunnableWrapper.run(RunnableWrapper.java:120)

at com.codename1.impl.CodenameOneThread.run(CodenameOneThread.java:176)

My code:

Visita v = new Visita();

ArrayList aVisita = consultaTablas(v, VISITA);

for (Object cmp : aVisita) {

v = (Visita) cmp;

Cliente c = consultaRegistroCliente(v.clienteId.get());

cr = new Coord(v.latitud.get(), v.longitud.get());

EncodedImage enc = null;

switch (v.estado.get()) {

case PENDIENTE:

enc = EncodedImage.createFromImage(iPendiente, false);

break;

case INICIADO:

enc = EncodedImage.createFromImage(iIniciado, false);

break;

case COMPLETADO:

enc = EncodedImage.createFromImage(iCompletado, false);

break;

}

mc.addMarker(enc,

cr,

c.nombre.get(),

c.direccion.get(),

e -> {

ToastBar.showMessage(c.nombre.get() + " " + c.direccion.get(), FontImage.MATERIAL_PLACE);

});

}

LocalizacionService.bind(pos -> {

Label lbUsuario = new Label();

lbUsuario.setMaterialIcon(FontImage.MATERIAL_PLACE, Display.getInstance().convertToPixels(0.09f));

Coord c = new Coord(pos.latitud.get(), pos.longitud.get());

mc.addMarker(lbUsuario, c);

mc.setCameraPosition(c);

try {

pos.latitud.addChangeListener(p -> {

Coord crd = mc.getCameraPosition();

if (crd.getLatitude() != pos.latitud.get()) {

lbUsuario.remove();

mc.addMarker(lbUsuario, new Coord(pos.latitud.get(), pos.longitud.get()));

lbUsuario.animate();

}

});

pos.longitud.addChangeListener(p -> {

Coord crd = mc.getCameraPosition();

if (crd.getLongitude() != pos.longitud.get()) {

lbUsuario.remove();

mc.addMarker(lbUsuario, new Coord(pos.latitud.get(), pos.longitud.get()));

lbUsuario.animate();

}

});

} catch (Exception err) {

// this isn't likely as this is a RAM based stream

Log.e(err);

Dialog.show("Error", err.getMessage(), "continuar", null);

}

}, loc -> {

});

Another important thing is that every time I delete and create the pin the map is centered based on its new position. I don't understand why it does it if I'm not using the setCameraPosition.

Thanks

Shai Almog

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Jan 27, 2021, 9:41:43 PM1/27/21

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Hi,

the exception seems like a bug. We'll have to look into that (please file an issue).