topic Re: Scalebar API in ArcGIS Runtime SDK for Android Questions

Scalebar API

tuannguyen3 — Mon, 14 May 2012 07:31:46 GMT

Hi everybody,
Currently, I find many ways yo add scale bar to Arcgis map on Android but it does not seem supporting that. Can everybody help me to solve this problem.

Thank you very much.

Re: Scalebar API

SimonKlein — Mon, 14 May 2012 08:14:31 GMT

For now there seems no SDK provided way to do this easily, or I just haven't found it sorry.

Re: Scalebar API

tuannguyen3 — Mon, 14 May 2012 09:14:41 GMT

Thank you for your answer. But is there any way to caculate length from point A to point B?

Re: Scalebar API

SimonKlein — Mon, 14 May 2012 11:15:15 GMT

http://help.arcgis.com/en/arcgismobile/10.0/apis/android/api/index.html
or
http://help.arcgis.com/en/arcgismobile/10.0/apis/android/api/index.html

Re: Scalebar API

GwenRoyakkers1 — Wed, 16 May 2012 06:39:13 GMT

Thank you for your answer. But is there any way to caculate length from point A to point B?

Yes there is a way.

The MapView class has a function toMapPoint(float screenx, float screeny).

You could use this function to determine the real distance between two points, and use it to draw a scalebar yourself.

calculating the length itself:

Point strtPoint = mapview.toMapPoint(screenX1, screenY1);
Point endPoint = mapview.toMapPoint(screenX2, screenY2);
Line line = new Line();
line.setStart(strtPoint);
line.setEnd(endPoint);
double length = line.calculateLength2D();

Regards

Gwen