QtOnAndroid

QML Web View

QML GPS Example | | QML Camera Example

In this QML example we use the Google Maps API to display a map at the actual location provided by the GPS sensor.

The Google API uses the REST notation with the following parameters:

  • ll = Lat/Lon coordinate
  • z = zoom level (0–20)
  • t = map type (“m” map, “k” satellite, “h” hybrid, “p” terrain, “e” GoogleEarth)

So for the TH N├╝rnberg at the GPS position (49.448,11.096) the correspondig URL for Google maps is:

 http://maps.google.com/maps?ll=49.448,11.096&t=k&z=18
GooogleMaps

Using the QML WebView class to show a map with the above url notation:

import QtQuick 2.0
import QtWebView 1.0
import QtPositioning 5.3

Rectangle {
    id: top
    anchors.fill: parent
    color: "black"

    PositionSource {
        id: gps
        preferredPositioningMethods: PositionSource.SatellitePositioningMethods
        updateInterval: 1000 // ms
        active: true
        onPositionChanged: {
            active = false;
        }
    }

    WebView {
        id: webview
        anchors.fill: parent

        url: "http://maps.google.com/maps?ll=" +
             gps.position.coordinate.latitude + "," +
             gps.position.coordinate.longitude +
             "&t=k&z=18"

        visible: gps.position.latitudeValid && gps.position.longitudeValid
    }
}

In the project file we need to add:

QT += webview

In the main function we need to initialize the web view:

#include <QtWebView/QtWebView>

QtWebView::initialize();

Full source code:

svn co svn://schorsch.efi.fh-nuernberg.de/qt-android/simpleweb


QML GPS Example | | QML Camera Example

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