Questions tagged [android]

"Android is a software stack for mobile devices that includes an operating system, middleware, and key applications," Wikipedia.

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17 views

GNSS algorithms in Android and IOS

I am trying to determine what algorithms are used to determine location and speed in late-model Android and IOS smartphones. I am looking into merging the location data with higher frequency IMU data ...
0 votes
0 answers
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Exporting from Field on Android tablet to Mac

I am having some trouble pushing data at the end of each work day. The tracking for the path I walked is pushed, but none of the data points on the map seem to upload. I thought maybe I could start ...
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0 votes
2 answers
45 views

How do I view KML network layers or WMS layers on mobile?

I want to view live layers (KML Network or WMS) on the phone. Google Earth application is very useful and advantageous for me and my team. But I guess Google Earth doesn't support live layers. Do I ...
0 votes
0 answers
118 views

How to build shared library from spatialite as static library NDK

I want to build a shared library for android to link with JNI, all libraries on which it depends are static libraries. I used this to build spatialite and sqlite for android : https://github.com/...
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1 vote
2 answers
226 views

QField imported project location on Android

Using Qfield 2.0.14 on Android 12. I manually transferred a QField project to my phone. I opened QField and used "Import Project from Folder". I have edited the project and can see the ...
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1 vote
1 answer
140 views

QField GPS error while tracking lines

I have been using QField for a while now testing whether our team should switch over to it for data collection. All was going well then we started getting really bad GPS errors while collecting lines. ...
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1 vote
1 answer
260 views

Displaying shapefiles in Google Maps Android

I want to develop an Android app which will display Google Maps and also display a shapefile (Esri shapefile with polygons, styled in ArcGIS, and having an attribute table). I want to be able to ...
-1 votes
1 answer
55 views

Advise on GPS logging for walking trails [closed]

Context: I am part of a volunteer organisation that needs to accurately log the GPS coordinates of walking trails. They cover around 350km. They are marked with waymarkers and signs, which we also ...
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0 votes
1 answer
371 views

QField fails to start with very simple project

I am new to this software so was following an online tutorial to create a very simple form with an open source base map. QGIS version 3.22.0-Białowieża. QField Sync v. 3.4.4. I copied all the files ...
0 votes
1 answer
83 views

Disable panning after loading a layer in ArcGIS Runtime

I have a MapView, I am loading a base map, and then I am loading a layer. Then I am setting the View Point to be that of the extent of the layer. The map loads and is zoomed to the extent of the Layer....
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0 answers
123 views

TtileProvider blank page - Google Maps API, own tile provider

I'm using Google Maps API to display mbtiles map hosted locally on my server. Tile service works fine (checked via requsts). But when I apply it to my Kotlin app nothing happens. Here's my code: ...
1 vote
0 answers
21 views

Identifying if a user is in building or shopping mall using GPS or WiFi data

I am trying to understand if there is a logic to see if a user is in a shopping mall or a building or outside using GPS or WiFi data captured from a mobile phone. Is there a logic to check?
0 votes
1 answer
229 views

Unable to save changes in QField [closed]

I am trying to set up QField for a project, and during testing I am not able to save changes to point layer, and get the error "Unable to save changes". Project is saved on internal storage, ...
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5 votes
2 answers
1k views

Is it possible to achieve sub-meter accuracies with a smartphone, without using an external GNSS-receiver?

I am currently working with QField on my tablet (Samsung Galaxy Tab S5e) and my smartphone (Samsung Galaxy A40). Since the positioning accuracy on my devices is rather low (absolute best case ~3m on ...
0 votes
1 answer
50 views

import .mbtiles[raster+png/jpg] from device can't view in Maptiler App

I am working with maptiler application in android[Kotlin+MVVM]. everything working fine except loading local .mbtiles map file. when I download a .mbtiles file from internet and load in to my android ...
1 vote
0 answers
74 views

How to enable positioning in underground Metro/Subway stations for smartphones? [closed]

Summary: my smartphone can't do public transport journey planning in underground metro and subway stations because it doesn't know where it is. Is there a description for cities and public transport ...
0 votes
1 answer
129 views

Returning null during using SpatiaLite transformation command in Android Studio

I am using Spatialite version as following: SPATIALITE_VERSION: 5.0.0-beta1 PROJ4_VERSION: Rel. 6.1.1 I am running the SpatiaLite transform function in the android studio and it returns a null value ...
1 vote
1 answer
395 views

Display WMS layer from local GeoServer in mobile application with Cesium JavaScript Library?

I need to display a WMS layer from my local GeoServer in a mobile application with the Cesium JavaScript Library, but I don't know how to do it. Can anyone help me?
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3 votes
0 answers
216 views

Calculate meter offset around decimal degree position

I have a position given in decimal degrees (x.xxxxxxxx and y.yyyyyyyy). I need to draw a rectangle around it. The center of the rectangle matches the position. The dimensions of the rectangle is given ...
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2 votes
1 answer
647 views

Better GPS accuracy in Android application

We are looking for ways to read higher GPS accuracy (less than 1 m) in our Android application. We have tried with couple of mobiles having L1 frequency and supports GPS , GLONASS, Galileo etc but ...
2 votes
0 answers
217 views

Can't find geotools class in jar file/Maven dependency Android app [closed]

I am creating an Android app and using an extension from Maven dependency. This extension use geotools classes but when I compile and execute the app I have the following error: 020-04-20 21:51:52....
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1 vote
0 answers
1k views

Can I use Geotools in Android Studio?

I want to use Geotools in Android Studio but get this error: Could not resolve org.geotools This is part of build.gradle allprojects { repositories { maven { url "http://repo.boundlessgeo.com/...
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1 vote
1 answer
2k views

How to use ground overlay google map android for polygon area to fit the map image in it?

I have a park area that is not rectangle or a simple shape. It is just like polygon area. I could load sample image on it for testing, in my android app. There it is : mGroundOverlayRotated = ...
2 votes
0 answers
546 views

QField does not get the GPS location on Android [closed]

I am using QField on three Samsung Galaxy S5 tab tablets for a field work. I created a QGIS project (with project and layers in the same CRS). I downloaded QField on the tablets and created a QField ...
0 votes
2 answers
700 views

GPX route generator for android

I am looking for a free, easy to use android app or mobile friendly website to plan a route and save it in GPX format. So far I have seen https://mapstogpx.com/ which unfortunately does not work with ...
2 votes
1 answer
97 views

qgis2threejs navigation Android

The navigation of a 3D qgis2threejs map for an Android tablet is not optimal. Test on 7 and 10 zoll. Problem: If I want to zoom in or out with two fingers the zoomlevels are to big. It should be small ...
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0 votes
0 answers
203 views

Exporting KML/ SHP/ EXCEL Files from Google Maps [Android version]

I want to export my pin locations using Google Maps [ Android version] and save the layer as KML /SHP/EXCEL in my phone. Is this feasible using Google Maps or are there any other applications which ...
1 vote
0 answers
523 views

OpenLayers GeoLocation.getPosition() is inconsistent

In my mobile application I am using OpenLayers and trying to capture current position of the user by using GeoLocation.getPosition() method. The method sometimes returns position and sometimes return ...
5 votes
1 answer
442 views

Relationship between Android bearing and iOS course?

I'm a mobile developer working on an Android and iOS app that displays the user's location and various POIs on a map. I've been comparing the location objects that I get back from Android and iOS and ...
1 vote
0 answers
150 views

How can I calculate point's coordinates based on bounding box and tap click on phone screen? [closed]

E.g. I have bounding box [94818.24, 116189.125] [94818.914, 116189.8] and point's coordinate on my screen [695, 1082]. So how can I get a coordinate in CRS=EPSG:99781
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2 votes
2 answers
1k views

QField operating system

Does anybody know if Qfield can run on Ipad? My understanding is it was build to run on Android 4.3 or later version. Anybodu knows if it can run on with IOS?
2 votes
0 answers
160 views

QField hyperlinks in Android

I am using QField for some mobile GIS on Android and would like to have a hyperlink in the attribute table that opens a file stored locally. If not in QField directly then in excel would work. None of ...
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0 votes
1 answer
702 views

Using getmapasync() function instead of getmap() function in Android to plot GeoJSON file?

This is the code that I have used to plot GeoJSON file in Google Maps in Android: mMap = googleMap; SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager() ...
1 vote
0 answers
112 views

Memory efficient shortest path algorithm for offline Android app [closed]

Finding the shortest path in a road network requires the road network to be loaded up in memory. Using Dijkstra's algorithm, for example, it searches through all the immediate road coordinates and ...
1 vote
0 answers
31 views

Memory management in offline routing with n waypoints?

I am trying to build an offline routing system with a map database on a portable Android device. Since I am still doing some research, I am stuck on what I think is a fundamental problem. To find the ...
3 votes
1 answer
1k views

Combining GPS and WiFi geolocation

I see that Google combines GPS with WiFi geolocation results to increase location accuracy. Does anyone know how it's done? How is WiFi information useful when it can have 10m+ accuracy? Is it only ...
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0 votes
1 answer
220 views

Easytouse Android app to visualise offline maps [closed]

I need to propose an application android, ultrasimple of use which proposes to visualize various layers offline (french Scan25, Orthophoto). The idea would be to create mbtiles (with QGIS, Mobac, ...
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1 vote
0 answers
134 views

Using QField in an Android emulator for Windows 10

I would like to use the QField application in a free and user-friendly Android emulator for Windows 10. May you recommand one ?
0 votes
0 answers
251 views

Start a tile server on Android app

We want to have a offline Leaflet map on mobile. For this we want to use some kind of Android app which will serve as a tile provider when offline. The Leaflet will refer to this Android app as tile ...
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2 votes
2 answers
743 views

Difference between MapBox mbtiles and offline mbtiles for MapBox Android SDK

I know what have some difference between MapBox mbtiles and offline mbtiles for MapBox Android SDK. In offline mbtiles for SDK besides tiles contains: Style JSON. All fonts and icons associated ...
2 votes
0 answers
372 views

calculating HRMS using NMEA sentences including GPGGA , GPGSV, GLGSV, QZGSV,QZGSA, GPGSA?

I have NMEA sentences including GPGGA , GPGSV, GLGSV, QZGSV,QZGSA, GPGSA and GNGSA. my goal is to achieve HRMS accuracy meter. produced android devices for special intent gives GP/GN GST nmea message ...
1 vote
0 answers
555 views

RTKGPS+ : Could we use the mobile device as a rover?

Using an Android (version 9) based smartphone, I installed RTKGPS+ ( https://github.com/eltorio/RtkGps ) from the play store. I wonder if it's possible to use the internal GPS chip of the smartphone ...
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1 vote
0 answers
596 views

.svg image is not loaded into webview in android

I'm using leaflet and trying to load .svg image on webview. `//Create the bounds and image to add. var imageUrl = mapData.plan.image; var imageBounds = [[mapData.plan.size_x, 0], [0, ...
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1 vote
0 answers
601 views

MapBox SDK load local MBTiles

does anyone know how I can load local MBTiles from the device storage using the MapBox SDK? The vector Tiles come from this Website: https://openmaptiles.com/downloads/planet/ The same page offers ...
  • 423
0 votes
1 answer
125 views

Running QField without a Google account [closed]

I'd like to give QField a try but I can not install it from Google Play Store. I do not want to create a Google account for privacy concerns. Is there a possibility to install QField without using ...
0 votes
0 answers
197 views

Android Library to convert ESRI Shapefiles to GeoJSON

I'm building an Android App for display ESRI Shapefiles but unfortunately, there are only a few free SDKs which support Shapefiles. Most of them working with GeoJSON, so now I'm looking for an Android ...
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0 votes
0 answers
366 views

How to add my photo in KML with Android?

I have tried with overlay and Placemark, I store my photo and KML together in one KMZ but when I open with Google Earth, I only can see the text in the location, not the photo. Here is my code: [?...
1 vote
0 answers
27 views

Auto delete 5th record while inserting 6th record of polygon to SpatiaLite table

I am having problem while inserting 6th record to SpatiaLite table it auto deletes 5th record, and after that it is ok. I am using SpatiaLite database to insert some polygon using Google Maps API in ...
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0 votes
1 answer
51 views

Seeking GIS Navigation App for High Accuracy Data? [closed]

Are there any mobile GIS applications that I can use to navigate to high accuracy data on android? I would like to load layers - a .shp or .kml and use the map to navigate to points. It needs to be ...
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0 votes
0 answers
80 views

Imported shapefiles will not load correctly in Android app MapIT

I am able to import shapefiles created with ArcMap, but the features do not appear on my map. When I zoom to them I am taken to the North Pole. I assume this is a projection issue. MapIT has a ...
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