Google Pixel C Tablet again , Black screen on OpenGL apps?

SGaist

That would make sense indeed.

AFAIK to you should only need to setup ANDROID_TARGET_ARCH in order to have 64 bit build of Qt for Android.

servanti

Yes After trying a few things and looking in the qmake.conf I did realize that I only had to set that one env variable to do a 64bit build and when I do trying to build the app I get this , do you know of anyone anyone who has ran a Qt OpenGL app on Pixel C ?

In file included from /home/allen/Android/Sdk/ndk-bundle/platforms/android-24/arch-arm64/usr/include/signal.h:37:0,
from /home/allen/Android/Sdk/ndk-bundle/platforms/android-24/arch-arm64/usr/include/pthread.h:33,
from /home/allen/Android/Sdk/ndk-bundle/sources/cxx-stl/gnu-libstdc++/4.9/libs/arm64-v8a/include/bits/gthr-default.h:35,
from /home/allen/Android/Sdk/ndk-bundle/sources/cxx-stl/gnu-libstdc++/4.9/libs/arm64-v8a/include/bits/gthr.h:148,
from /home/allen/Android/Sdk/ndk-bundle/sources/cxx-stl/gnu-libstdc++/4.9/include/ext/atomicity.h:35,
from /home/allen/Android/Sdk/ndk-bundle/sources/cxx-stl/gnu-libstdc++/4.9/include/bits/basic_string.h:39,
from /home/allen/Android/Sdk/ndk-bundle/sources/cxx-stl/gnu-libstdc++/4.9/include/string:52,
from /home/allen/Android/Sdk/ndk-bundle/sources/cxx-stl/gnu-libstdc++/4.9/include/random:40,
from /home/allen/Android/Sdk/ndk-bundle/sources/cxx-stl/gnu-libstdc++/4.9/include/bits/stl_algo.h:66,
from /home/allen/Android/Sdk/ndk-bundle/sources/cxx-stl/gnu-libstdc++/4.9/include/algorithm:62,
from /home/allen/QtAndroid/5.5/android_armv7/include/QtCore/qglobal.h:85,
from /home/allen/QtAndroid/5.5/android_armv7/include/QtGui/qopenglwindow.h:37,
from /home/allen/QtAndroid/5.5/android_armv7/include/QtGui/QOpenGLWindow:1,
from ../qopenglwindow/main.cpp:41:
/home/allen/Android/Sdk/ndk-bundle/platforms/android-24/arch-arm64/usr/include/asm/sigcontext.h:44:2: error: '__uint128_t' does not name a type
__uint128_t vregs[32];
^
In file included from /home/allen/Android/Sdk/ndk-bundle/sources/cxx-stl/gnu-libstdc++/4.9/include/random:49:0,
from /home/allen/Android/Sdk/ndk-bundle/sources/cxx-stl/gnu-libstdc++/4.9/include/bits/stl_algo.h:66,
from /home/allen/Android/Sdk/ndk-bundle/sources/cxx-stl/gnu-libstdc++/4.9/include/algorithm:62,
from /home/allen/QtAndroid/5.5/android_armv7/include/QtCore/qglobal.h:85,
from /home/allen/QtAndroid/5.5/android_armv7/include/QtGui/qopenglwindow.h:37,
from /home/allen/QtAndroid/5.5/android_armv7/include/QtGui/QOpenGLWindow:1,
from ../qopenglwindow/main.cpp:41:
/home/allen/Android/Sdk/ndk-bundle/sources/cxx-stl/gnu-libstdc++/4.9/include/bits/random.h:106:26: error: expected unqualified-id before '__int128'
{ typedef unsigned __int128 type; };
^
make: *** [.obj/main.o] Error 1
14:31:02: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project qopenglwindow (kit: Android for armeabi-v7a (GCC 4.9, Qt 5.5.1))
When executing step "Make"

SGaist

Sorry, I'm not aware of somebody owning a Pixel C around me.

Did you rebuild Qt for 64 bit ?

servanti

noticed that I had to set a few other Env variables

ANDROID_NDK_TOOLCHAIN_PREFIX=aarch64-linux-android
ANDROID_NDK_TOOLS_PREFIX=aarch64-linux-android

No, I am looking in to building Qt from source with the NDK 64bit toolchain, but what is puzzling is why non-opengl apps run?

SGaist

Do you mean widget based app ?

servanti

Yes, so far any non-OGL app works. I am trying to cross compile with Android 64bit toolchain but in the configure command I seem not to be able to tell it to go to the aarch64 architecture. the qdevice.pri that is generated keeps listing
DEFAULT_ANDROID_TARGET_ARCH = armeabi-v7a

So I am not using the correct compilers. I have exported all the environment variable (BTW I am on Ubuntu) bit it seems that these environment variables are not set in the qmake.conf. What is the configure option to set these?

Thanks

SGaist

Can you show your environment setup and configure call ?

servanti

Sorry for the delay , This website was flaky yesterday. I have it all building. I managed (and it took a bit ) to cross compile Qt for 64 bit android using the android-24 NDK platform and toolchains. No luck , but I see a more meaningful message now. The activity fails to start on the device and here is the message
W ActivityThread: Application org.qtproject.example.qopenglwindow can be debugged on port 8100...
E Qt : Can't create main activity
E Qt : java.io.FileNotFoundException: /data/user/0/org.qtproject.example.qopenglwindow/lib/libplugins_platforms_android_libqtforandroid.so: open failed: ENOENT (No such file or directory)

I do have the ibplugins_platforms_android_libqtforandroid.so in the folder where the app is built. I saw some Qt bug report yesterday and some one mentioned they had the black screen and it was due to third party libs. I tried in the configuration to turn all third party libs disabled or use the Qt Bundle , Here is "final Qt Config report at the end of cross compiling. Is there something I am missing? Any ideas about third part libs or why I get this error on Activity start? Thanks

Final config for Android 64 bit

Running configure tests...

Checking for fontconfig... no
Checking for gccdepends... yes
Checking for glx... no
Checking for gnuld... yes
Checking for icu... no
Checking for leveldb... no
Checking for libwebp... no
Checking for libXcomposite... no
Checking for libxml2... no
Checking for libXrender... no
Checking for libxslt... no
Checking for libzlib... yes

Final configuration:

Build ......................... webkit1 webkit2
Configuration ................. debug
All-in-one files .............. no
GNUmake ....................... yes
Static libs as shared ......... no
Static libs as thin archives .. yes
Production build .............. yes

Have .......................... qtquick qtprintsupport qstyle qttestlib qtpositioning qtsensors
Use ........................... tiled_backing_store cross_platform_context_menus zlib 3d_graphics gstreamer native_fullscreen_video leveldb wchar_unicode glib
Features ...................... fast_mobile_scrolling gesture_events inspector_server legacy_viewport_adaption smooth_scrolling subpixel_layout touch_adjustment view_mode_css_media plugin_architecture_unsupported

3D Rendering .................. yes
Accelerated 2D Canvas ......... yes
Battery Status ................ no
Blob .......................... yes
Canvas Path ................... yes
CanvasProxy ................... no
Channel Messaging ............. yes
Content Security Policy 1.1 ... no
CSS Device Adaptation ......... no
CSS Exclusions ................ yes
CSS Shapes .................... yes
CSS Filters ................... yes
CSS3 Conditional Rules support (i.e. @supports) no
CSS3 Text ..................... no
CSS3 Text Line Break .......... no
CSS box-decoration-break ...... yes
CSS image-orientation ......... no
CSS image-resolution .......... no
CSS image-set ................. yes
CSS Regions ................... yes
CSS Shaders ................... no
CSS sticky position ........... yes
CSS Compositing ............... yes
Support for unprefixed CSS animations and transforms yes
CSS Variable .................. no
Custom Scheme Handler ......... no
Datalist Element .............. yes
Data Transfer Items ........... no
Details Element ............... yes
Device Orientation ............ yes
Dialog Element ................ no
Directory Upload .............. no
Expose DOM4 Events constructors no
Download Attribute ............ yes
File System ................... no
Filters ....................... yes
Font Load Events .............. no
FTP Directory ................. yes
Fullscreen API ................ yes
Gamepad ....................... no
Geolocation ................... yes
High DPI Canvas ............... no
Icondatabase .................. yes
Iframe seamless attribute ..... yes
Indexed Database .............. yes
Input Speech .................. no
Input Type Color .............. yes
Input Type Date ............... no
Broken Input Type Datetime .... no
Input Type Datetimelocal ...... no
Input Type Month .............. no
Input Type Time ............... no
Input Type Week ............... no
Inspector ..................... yes
JavaScript Debugger ........... yes
Legacy Notifications .......... yes
Legacy Vendor Prefix .......... yes
Legacy Web Audio .............. yes
Link Prefetch ................. yes
MathML ........................ no
Media Capture ................. no
Media Source .................. no
Media Statistics .............. no
Media Stream .................. no
Meter Element ................. yes
MHTML ......................... yes
Microdata ..................... no
Scaled mouse cursor ........... no
Navigator Content Utils ....... no
Netscape Plugin API ........... no
Network Info .................. no
Support for 'X-Content-Type-Options: nosniff' no
Notifications ................. yes
Orientation Events ............ yes
Page Visibility API ........... yes
Performance Timeline .......... no
Progress Element .............. yes
Proximity Events .............. no
Quota ......................... no
Resolution media query ........ yes
Resource Timing ............... no
Request Animation Frame ....... yes
Seccomp Filter sandbox ........ no
Scripted Speech ............... no
Shadow DOM .................... no
Shared Workers ................ yes
SQL Database .................. yes
Style Scoped .................. no
Suid sandbox for linux ........ no
SVG ........................... yes
SVG Fonts ..................... yes
HTMLTemplateElement ........... no
Text Autosizing ............... no
Tiled Backing Store ........... no
Threaded HTML parser .......... no
Touch Events .................. yes
Touch Slider .................. yes
Touch Icon Loading Support .... no
User Timing ................... no
Vibration ..................... no
Video ......................... yes
Video Track ................... yes
WebGL ......................... yes
Web Audio ..................... no
Web Sockets ................... yes
Web Timing .................... yes
Workers ....................... yes
XHR Timeout ................... yes
XSLT .......................... no

Encountered 2 configuration warning(s):

! Qt not configured to use system libjpeg, QImageDecoder will decode JPEG images
! Qt not configured to use system libpng, QImageDecoder will decode PNG images

servanti

@SGaist So I did some more looking around and saw a blog post that explained how to use Android Studio to source level debug the Java Activity part of a Qt app. It seem that in createBundeleBinary methot in QtActivity.java
it looks for libqtforandroid.so in /data/usr/0/org.qtproject.example/q-reserved-files/plugins/platforms/android and it does not find it there, there is a msg in the code that I never see on the application window

"This application requires Ministro service. Would you like to install it"
which makes sense if it does not find the .so . I never specified using Ministro in the kit. Also /data folder is protected and I
cannot look in it in the adb shell, I suppose unless I root the device which since it is not mine I do not want to do.
Do you have any idea why this so is not installed even though it is in the Android folder when I build, is this
a bug in androiddeplyqt? I have the code but was wondering if you know anything about this. I read in some other
bug reports or discussions that there maybe a bug. Again this happen ONLY on Pixel C , we run fine on other android devices.

SGaist

That might be something specific to the Pixel C OS setup.

One thing to check is the properties of your project. IIRC you can select whether you want to use Ministro or embed Qt with your application when deploying.