Map Viewer no longer work

[Virion]

I have been using Qt Quick's map viewer (OSM) feature on android for some time now. It used to work but for some reason it no longer display anything now (empty map) on android, but somehow works on desktop.

So I decided to create a new Qt Quick project and wrote a minimal map viewer to see if it work:

import QtQuick 2.0
import QtQuick.Window 2.0
import QtLocation 5.6
import QtPositioning 5.6

Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")

    Plugin {
            id: mapPlugin
            name: "osm"
        }

    Map {
        anchors.fill: parent
        plugin: mapPlugin
        center: QtPositioning.coordinate(59.91, 10.75)
        zoomLevel: 14
    }
}

This, too, doesnt work on android. It works on desktop but not android. I can see the OSM copyright text but the map is empty. Any idea?

[koahnig]

@Virion

Hi and welcome to devnet forum

What did change for your Android setup is the key question?
You are the only one being able to answer.

Change of Android on device or different device?
Change of Qt version?

Anything else is crystal ball reading.

[Virion]

@koahnig nothing changed. Our users just complained the app suddenly doesn't show the map. We never updated the app for few months so should have nothing changed. Qt 5.10 by the way. I also tried other versions 5.11, 5.12 but still the same.

[Virion]

Update: Seems like it works on my older android 6.0 phone, but not android 8.0. Not sure what happened there, I can only see the copyright text and marker but a blank map on android 8.0.

[Virion]

After some debugging, it seems to be related to SSL:

QGeoTileRequestManager: Failed to fetch tile (210,123,8) 5 times, giving up. Last error message was: 'Error creating SSL context ()'

If I remember correctly, Qt android doesn't come with SSL am I correct?

[sierdzio]

@Virion said in Map Viewer no longer work:

If I remember correctly, Qt android doesn't come with SSL am I correct?

Correct. Qt never ships with prebuilt OpenSSL due to law restrictions.

[Virion]

Problem fixed. I just built my own OpenSSL and added both libcrypto.so and libssl.so to my "Additional Libraries" option under "Build Android APK" step.

Hope this post helps any other people who faced similar problem. Thanks.

[oscarcook]

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