Simplify createGpxString with appendLine and string interpolation.
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1 changed files with 31 additions and 101 deletions
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@ -109,118 +109,48 @@ object TrackHelper {
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/* Creates GPX string for given track */
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fun createGpxString(track: Track): String {
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var gpxString: String
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val gpxString = StringBuilder("")
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// add header
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gpxString = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\" ?>\n" +
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"<gpx version=\"1.1\" creator=\"Trackbook App (Android)\"\n" +
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" xmlns=\"http://www.topografix.com/GPX/1/1\"\n" +
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" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n" +
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" xsi:schemaLocation=\"http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd\">\n"
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// Header
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gpxString.appendLine("""
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<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
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<gpx
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version="1.1" creator="Trackbook App (Android)"
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xmlns="http://www.topografix.com/GPX/1/1"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd"
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>
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""".trimIndent())
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gpxString.appendLine("\t<metadata>")
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gpxString.appendLine("\t\t<name>Trackbook Recording: ${track.name}</name>")
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gpxString.appendLine("\t</metadata>")
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// add name
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gpxString += createGpxName(track)
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// add POIs
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gpxString += createGpxPois(track)
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// add track
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gpxString += createGpxTrk(track)
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// add closing tag
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gpxString += "</gpx>\n"
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return gpxString
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}
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/* Creates name for GPX file */
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private fun createGpxName(track: Track): String {
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val gpxName = StringBuilder("")
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gpxName.append("\t<metadata>\n")
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gpxName.append("\t\t<name>")
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gpxName.append("Trackbook Recording: ${track.name}")
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gpxName.append("</name>\n")
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gpxName.append("\t</metadata>\n")
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return gpxName.toString()
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}
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/* Creates GPX formatted points of interest */
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private fun createGpxPois(track: Track): String {
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val gpxPois = StringBuilder("")
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// POIs
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val poiList: List<WayPoint> = track.wayPoints.filter { it.starred }
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poiList.forEach { poi ->
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gpxPois.append("\t<wpt lat=\"")
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gpxPois.append(poi.latitude)
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gpxPois.append("\" lon=\"")
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gpxPois.append(poi.longitude)
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gpxPois.append("\">\n")
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// add name to waypoint
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gpxPois.append("\t\t<name>")
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gpxPois.append("Point of interest")
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gpxPois.append("</name>\n")
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// add altitude
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gpxPois.append("\t\t<ele>")
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gpxPois.append(poi.altitude)
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gpxPois.append("</ele>\n")
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// add closing tag
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gpxPois.append("\t</wpt>\n")
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gpxString.appendLine("\t<wpt lat=\"${poi.latitude}\" lon=\"${poi.longitude}\">")
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gpxString.appendLine("\t\t<name>Point of interest</name>")
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gpxString.appendLine("\t\t<ele>${poi.altitude}</ele>")
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gpxString.appendLine("\t</wpt>")
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}
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return gpxPois.toString()
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}
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/* Creates GPX formatted track */
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private fun createGpxTrk(track: Track): String {
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val gpxTrack = StringBuilder("")
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// TRK
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val dateFormat = SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'", Locale.US)
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dateFormat.timeZone = TimeZone.getTimeZone("UTC")
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// add opening track tag
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gpxTrack.append("\t<trk>\n")
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// add name to track
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gpxTrack.append("\t\t<name>")
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gpxTrack.append("Track")
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gpxTrack.append("</name>\n")
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// add opening track segment tag
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gpxTrack.append("\t\t<trkseg>\n")
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// add route point
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gpxString.appendLine("\t<trk>")
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gpxString.appendLine("\t\t<name>${track.name}</name>")
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gpxString.appendLine("\t\t<trkseg>")
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track.wayPoints.forEach { wayPoint ->
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// add longitude and latitude
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gpxTrack.append("\t\t\t<trkpt lat=\"")
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gpxTrack.append(wayPoint.latitude)
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gpxTrack.append("\" lon=\"")
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gpxTrack.append(wayPoint.longitude)
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gpxTrack.append("\">\n")
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// add altitude
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gpxTrack.append("\t\t\t\t<ele>")
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gpxTrack.append(wayPoint.altitude)
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gpxTrack.append("</ele>\n")
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// add time
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gpxTrack.append("\t\t\t\t<time>")
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gpxTrack.append(dateFormat.format(Date(wayPoint.time)))
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gpxTrack.append("</time>\n")
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// add closing tag
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gpxTrack.append("\t\t\t</trkpt>\n")
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gpxString.appendLine("\t\t\t<trkpt lat=\"${wayPoint.latitude}\" lon=\"${wayPoint.longitude}\">")
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gpxString.appendLine("\t\t\t\t<ele>${wayPoint.altitude}</ele>")
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gpxString.appendLine("\t\t\t\t<time>${dateFormat.format(Date(wayPoint.time))}</time>")
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gpxString.appendLine("\t\t\t</trkpt>")
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}
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gpxString.appendLine("\t\t</trkseg>")
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gpxString.appendLine("\t</trk>")
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gpxString.appendLine("</gpx>")
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// add closing track segment tag
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gpxTrack.append("\t\t</trkseg>\n")
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// add closing track tag
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gpxTrack.append("\t</trk>\n")
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return gpxTrack.toString()
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return gpxString.toString()
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}
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/* Toggles starred flag for given position */
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