Modifying answer of type GeoPoint before upload from Collect

Development
1

Hello, I have a form with a question that has an answer of type GeoPoint (it also has another question 'WKT' which has an answer of type Text).

My GeoPoint class has:
@Override
public IAnswerData getAnswer() {
String s = mStringAnswer.getText().toString();
if (s == null || s.equals("")) {
return null;
} else {
try {
// segment lat and lon
String sa = s.split(" ");
double gp = new double[4];
gp[0] = Double.valueOf(sa[0]).doubleValue();
gp[1] = Double.valueOf(sa[1]).doubleValue();
gp[2] = Double.valueOf(sa[2]).doubleValue();
gp[3] = Double.valueOf(sa[3]).doubleValue();

            return new GeoPointData(gp);
        } catch (NumberFormatException e) {
        	Log.e(t, e.getMessage());
        	return null;
        }
    }

I'd like to, instead, return a WKT format Text like Point(103.2, 30.2). I've tried putting it as return new StringData("Point(" + gp[1] + " " + gp[0] + ")"); but I keep getting an error that it's expecting Double Double.

I'd like to know how to go about doing this and where to start looking.

  1. Can I do it easily where, before upload, find the answer and change the value?
  2. Can I change the type detection of GeoPoint so that I can enter string?
  3. Can I change the value of the answer for the other question "WKT" to have the answer from GeoPoint?
  4. Can I create a custom type which would be similar to GeoPoint but, instead, stores as a WKT format string?
2

(3) If you need a text field, drawn from the values within a GeoPoint, it
is best to define a calculate field that transforms the geopoint string
representation into a string in whatever format you need.

(1) No. There is no post-processing capability in ODK Collect. The
transformation needs to be done as part of the filling out of the form.

(2) There is no capability to redefine the representation of a geopoint to
match your needs. It has a very specific representation.

(4) No. There is no capability to define a custom datatype in ODK Collect.

ยทยทยท On Mon, Jan 12, 2015 at 6:54 AM, wrote:

Hello, I have a form with a question that has an answer of type GeoPoint
(it also has another question 'WKT' which has an answer of type Text).

My GeoPoint class has:
@Override
public IAnswerData getAnswer() {
String s = mStringAnswer.getText().toString();
if (s == null || s.equals("")) {
return null;
} else {
try {
// segment lat and lon
String sa = s.split(" ");
double gp = new double[4];
gp[0] = Double.valueOf(sa[0]).doubleValue();
gp[1] = Double.valueOf(sa[1]).doubleValue();
gp[2] = Double.valueOf(sa[2]).doubleValue();
gp[3] = Double.valueOf(sa[3]).doubleValue();

            return new GeoPointData(gp);
        } catch (NumberFormatException e) {
            Log.e(t, e.getMessage());
            return null;
        }
    }

I'd like to, instead, return a WKT format Text like Point(103.2, 30.2).
I've tried putting it as return new StringData("Point(" + gp[1] + " " + gp[0] + ")"); but I keep getting an error that it's expecting Double
Double.

I'd like to know how to go about doing this and where to start looking.

  1. Can I do it easily where, before upload, find the answer and change the
    value?
  2. Can I change the type detection of GeoPoint so that I can enter string?
  3. Can I change the value of the answer for the other question "WKT" to
    have the answer from GeoPoint?
  4. Can I create a custom type which would be similar to GeoPoint but,
    instead, stores as a WKT format string?

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Mitch Sundt
Software Engineer
University of Washington
mitchellsundt@gmail.com