Qt modules are not installed

Ferni · wrote on 12 Oct 2016, 14:47

Hi everyone!
I'm working with Qt for Android and I could build and create successfully the apk but on runtime I receive a strange warning.

W libAPPEXAMPLE.so: assets:/APPEXAMPLE/main.qml:3 ((null)): assets:/APPEXAMPLE/main.qml:3:1: module "QtQuick.Window" is not installed
W libAPPEXAMPLE.so: assets:/APPEXAMPLE/main.qml:2 ((null)): assets:/APPEXAMPLE/main.qml:2:1: module "QtQuick" is not installed
W libAPPEXAMPLE.so: assets:/APPEXAMPLE/main.qml:4 ((null)): assets:/APPEXAMPLE/main.qml:4:1: module "QtMultimedia" is not installed

I could copy the qml modules into the apk in assest with:

ANDROID_EXTRA_PLUGINS += \
                                              PATH_TO_WHATEVER

but I'm not sure if this is the right place or if the files should be copy in /assets/--Added-by-androiddeployqt--/ (as I saw in a qt example)

Could someone explain me how to copy properly the qml modules into the apk and how to set the path (if needed).

I also want to load some qml modules that I've done, I guess it would be pretty much the same, isn't it?

Thanks!
Fernando

Ferni · 19 Oct 2016, 04:50

After almost a week and no progress in this topic, I tried with a basic application template. I created a new project (Application --> Qt Quick Application) and deployed a Hello World to my android device. Everything went just fine until I wanted to move the project's file. Qt creator does not have a neat structure for the examples to I wanted to have this:

AppName
| -----project ---> .pro, .pri files
|
| -----src ---> .cpp files
|
| -----include ---> .h files
|
| -----resources ---> .qrc, .qml. images, sounds, etc files

I moved the files one by one and made a deploy in every step I took BUT when I moved the .pro and .pri files I received the same error I asked before:

W libTemplate_Android.so: (null):0 ((null)): QQmlApplicationEngine failed to load component
W libTemplate_Android.so: (null):0 ((null)): qrc:/main.qml:1 module "QtQuick" is not installed
W libTemplate_Android.so: qrc:/main.qml:2 module "QtQuick.Window" is not installed
W libTemplate_Android.so: qrc:/main.qml:1 module "QtQuick" is not installed
W libTemplate_Android.so: qrc:/main.qml:2 module "QtQuick.Window" is not installed
10-18 10:55:06.785 14226 14256 W libTemplate_Android.so:

Does anyone have idea about what I'm doing wrong or if I'm doing something that it's prohibited in qt? Any ideas how to solve this?
Am I using the right file structure for my project?

Thanks!!
Fernando

jsulm · F Ferni 18 Oct 2016, 13:57

@Ferni If you're moving files around then you have to update your pro file. Check the paths there.

Ferni · wrote on 19 Oct 2016, 14:12

Hey @jsulm thanks for the answer!! Yeap, I didn't miss that. I could do the run qmake and build successfully and the problem is a runtime issue. I could not find anything yet in Qt's webpage about the problem :/

SGaist · wrote on 19 Oct 2016, 20:10

Hi,

Do you have a AppName.pro file ?

Ferni · wrote on 20 Oct 2016, 13:46

Hey @SGaist !! Yes, I do. I let it here. I'm almost 100% sure that there is no problem with my .pro. Anyways, I find really strange that Qt has problem with the location of the files. What I know (from Qt documentation) is that resources must be located in the .qrc folder (or subfolder). But there is no comments about the relation between .pro and .qrc. What I could do to solve this is:

Create a dummy.qml with the includes and an empty Item
Locate the file with the .pro
Add the file under OTHER_FILES
Use the assets approach to access qml and other resources
Now, the QtQuick, QtQuick.Window and others Qt Modules are recognized but I'd like to use the qrc approach since it is multiplatform.

TEMPLATE = app

QT += qml quick
CONFIG += c++11

SOURCES += \
            ../src/main.cpp \

# Additional import path used to resolve QML modules in Qt Creator's code model
QML_IMPORT_PATH = 

# Default rules for deployment.
include(../deployment.pri)

RESOURCES += ../qrc/qml.qrc

DISTFILES += \
    android/AndroidManifest.xml \
    android/gradle/wrapper/gradle-wrapper.jar \
    android/gradlew \
    android/res/values/libs.xml \
    android/build.gradle \
    android/gradle/wrapper/gradle-wrapper.properties \
    android/gradlew.bat

ANDROID_PACKAGE_SOURCE_DIR = $$PWD/android

SGaist · wrote on 20 Oct 2016, 18:55

What does you main .pro file look like ?

Ferni · wrote on 20 Oct 2016, 20:24

I wrote my main .pro file in the last reply

SGaist · wrote on 20 Oct 2016, 20:25

Then I may have misunderstood your setup.

Isn't that .pro file in a subfolder called project in your source tree ?

sierdzio · wrote on 21 Oct 2016, 06:01

@SGaist I think @Ferni has .pro file in a subfolder, but is not using SUBDIRS approach. Instead, all .pro/.pri files are stored in "project" dir.

SGaist · wrote on 21 Oct 2016, 07:33

@sierdzio That's also what I've concluded and I wonder if this isn't why qmake might get lost.

sierdzio · wrote on 21 Oct 2016, 09:00

@SGaist It might. Older qmake (or Qt Creator) versions definitely would get confused. I'm not sure about newest releases, I vaguely recall mentions of some fixes in this area, but I have not tested it. I keep my .pro files ordered as Qt expects it to ;)

Ferni · wrote on 21 Oct 2016, 12:38

Hey! Sorry for my late reply but it's 9am here! I tried (as @sierdzio said) just one .pro but I separated my files in folders (not the subdirs structure). Since I'm relative new to Qt and I discover every day something new, I don't know if what I've done it's ok or not.

Know I put all my resources (qml, sounds, images, etc) in the .pro's folder and I'm trying to make it work. It was just curiosity aboute why the .qrc has to be placed at the same level or in a subfolder from the .pro.

I'll mark this post as SOLVED because the problem is related to the project's structure and there is no problem with Qt.

Thank you guys!!

SGaist · wrote on 21 Oct 2016, 13:19

Currently the only rule I am aware of is that all the files you put in the .qrc must in the same folder or in a subfolder of where the .qrc file lives.

You may have found something new.