topic Re: How to center the map depending on graphics on it ? in ArcGIS Runtime SDK for Android Questions

How to center the map depending on graphics on it ?

MohamedEzzerI — Thu, 04 Aug 2016 11:50:52 GMT

How to center the map depending on graphics on it ?
it means that all graphics on map, (markers, plygons and polylines) must be shown

Re: How to center the map depending on graphics on it ?

AlexanderNohe1 — Thu, 04 Aug 2016 12:04:29 GMT

Mohamed EzzerI

What I would do, if working with only one layer, is use the getFullExtent() method on that layer and then use mapView.setExtent to then set the extent that I would like to zoom to. This of course would all have to occur after the layer is fully initialized.

Layer.GetFullExtent()

Layer | ArcGIS Android 10.2.8 API

MapView.SetExtent()

MapView | ArcGIS Android 10.2.8 API

I hope this helps!

Re: How to center the map depending on graphics on it ?

MohamedEzzerI — Thu, 04 Aug 2016 13:55:13 GMT

It didn't work, it's focus to the center of the map

Le 4 août 2016 13:05, "Alexander Nohe" <geonet@esri.com> a écrit :

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How to center the map depending on graphics on it ?
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Re: How to center the map depending on graphics on it ?

AlexanderNohe1 — Sat, 11 Dec 2021 13:55:33 GMT

Are you waiting for the map to be fully initialized?

mapView.setOnStatusChangedListener(new OnStatusChangedListener() {
  @Override public void onStatusChanged(Object o, STATUS status) {
   if (status == STATUS.INITIALIZED) {
   //Do Something
   }
  }
});

Additionally, are you placing your coordinates in web mercator projection?

Re: How to center the map depending on graphics on it ?

MohamedEzzerI — Fri, 05 Aug 2016 15:32:07 GMT

Thx for the feedback, i dont understand what do you mean by mercator

projection, but i can tell you that i m placing my coordinates using

mvHelper.addMarkerGraphic and mvHelper.addPolygonGraphic

Le 5 août 2016 14:25, "Alexander Nohe" <geonet@esri.com> a écrit :

GeoNet <https://community.esri.com/?et=watches.email.thread>
How to center the map depending on graphics on it ?
reply from Alexander Nohe
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Re: How to center the map depending on graphics on it ?

AlexanderNohe1 — Fri, 05 Aug 2016 15:55:06 GMT

This should explain projections:

Spatial references—ArcGIS Runtime SDK for Android | ArcGIS for Developers

Mapping Projections Explained

Additionally, what code are you using to zoom to the extent? It is possible that if you are zooming to -38, 71, that you will be zoomed into the center of the map because the map projections unit of measurement would then be in meters, not decimal degrees as you may expect.

Re: How to center the map depending on graphics on it ?

MohamedEzzerI — Sat, 11 Dec 2021 13:55:36 GMT

Hi Alexander, thnx for your help,
I'm using the code below, and i want to center the camera after creating all of the markers and ploygons
//------------------

mvHelper = new MapViewHelper(arcMap);

arcMap.setOnStatusChangedListener(new OnStatusChangedListener() {
    public void onStatusChanged(Object source, STATUS status) {
        if (status == STATUS.INITIALIZED) {
            mvHelper.setShowGraphicCallout(true);
            createMarker();
            createPolygon();

            arcMap.setExtent(graphicsLayer.getFullExtent());
        }
    }

});

//----------createMarker()------------//

public void createMarker() {
    String url = "http://screendydev.cloudapp.net/screendy/files/projects/mytest/res/others/markers.json";
    final String resp = StudioUtilities.sendGetRequest(url);
    final Drawable icon = ContextCompat.getDrawable(ctx, R.drawable.map_marker);

    try {
        JSONObject jsonObject = new JSONObject(resp);
        JSONArray jsonArray = jsonObject.getJSONArray("markers");
        int count = 0;
        while (count < jsonArray.length()) {
            JSONObject marker = jsonArray.getJSONObject(count);

            int loaded = mvHelper.addMarkerGraphic(
                    Double.parseDouble(marker.getString("latitude")),
                    Double.parseDouble(marker.getString("longitude")),
                            /*marker.getString("title"), marker.getString("subtitle"), null, icon, false, 0);*/
                    marker.getString("title"), marker.getString("subtitle"), null, icon, false, 1);
            if (loaded < 0) {
                Log.d("TAG", "Marker Graphic not added to MapView");
            } else {
                graphicsLayer.getGraphic(loaded);
            }
            count++;
        }
    } catch (JSONException e) {
        e.printStackTrace();
    }
}  //----------createPolygon------------//
public void createPolygon() {
    String url = "http://screendydev.cloudapp.net/screendy/files/projects/mytest/res/others/polygons.json";
    final String resp = StudioUtilities.sendGetRequest(url);
    try {
        JSONObject jsonObject = new JSONObject(resp);
        JSONArray jsonArray = jsonObject.getJSONArray("polygons");
        for (int i = 0; i < jsonArray.length(); i++) {
            JSONObject polygon = jsonArray.getJSONObject(i);
            JSONObject borderObject = polygon.getJSONObject("border");
            JSONObject startPointObject = polygon.getJSONObject("starting_point");
            final JSONArray pointsArray = polygon.getJSONArray("points");
            double[][] p = new double[pointsArray.length()][2];
            for (int j = 0; j < pointsArray.length(); j++) {
                try {
                    final JSONObject point = pointsArray.getJSONObject(j);
                    p[0] = Double.parseDouble(point.getString("latitude"));
                    p[1] = Double.parseDouble(point.getString("longitude"));
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
            String title = polygon.getString("title");
            String subtitle = polygon.getString("subtitle");
            int size = borderObject.getInt("size");
            int bgColor = adjustAlpha(Color.parseColor(polygon.getString("background")));
            int borderColor = Color.parseColor(borderObject.getString("color"));
            mvHelper.addPolygonGraphic(p, title, subtitle, "", bgColor, borderColor, size, 1);
        }
    } catch (JSONException e) {
        e.printStackTrace();
    }
}

Re: How to center the map depending on graphics on it ?

AlexanderNohe1 — Mon, 15 Aug 2016 13:45:44 GMT

It looks as though those JSON files you are using are not currently available.

Re: How to center the map depending on graphics on it ?

MohamedEzzerI — Wed, 17 Aug 2016 19:22:27 GMT

They are working now, it was just some maintenance on our servers

2016-08-15 14:46 GMT+01:00 Alexander Nohe <geonet@esri.com>:

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How to center the map depending on graphics on it ?
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Re: How to center the map depending on graphics on it ?

MohamedEzzerI — Thu, 18 Aug 2016 22:15:35 GMT

Hi Alexander Nohe‌, i wish u have a good day, i still need your precious help in that problem, i wish that you could help me

Re: How to center the map depending on graphics on it ?

AlexanderNohe1 — Fri, 19 Aug 2016 12:25:17 GMT

I am sorry, I have been quite busy recently so I missed your messages. I may get to testing this a little later today.

Re: How to center the map depending on graphics on it ?

AlexanderNohe1 — Fri, 19 Aug 2016 19:37:48 GMT

Hello mohamedezzeri‌

I have gone ahead and ran a few tests and seem to be running into the same issues as you are. I will have to discuss this with a few of my colleagues.

Thank you