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Mobile and Embedded

The forum for developing everything embedded: Linux, WinCE, Symbian, MeeGo... you name it.
14.1k Topics 62.5k Posts
  • Deployment failed. The settings in the Devices window of Xcode might be incorrect.

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    Better solution for Qt Projects: Open Project .pro File and Add this line: Version = 1.0.0.0
  • Installing new module

    Unsolved ubuntu 16.04 raspberry pi 3 cross compile serial port new module
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    jsulmJ
    @vishbynature It's config.log file located in the same directory from which you called configure. It is a text file, nothing special. Look for compile errors in that file related to to what you need.
  • Raspberry pi 3B+, QMultimedia problem with playing 4 streams

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    Hi Thank You for Your answer and sorry for the late answer. I am trying to play 4 streams from Dahua DVR H264 MPEG-4 AVC streams using rtsp, resolution is 352x288 What memory I am consiming? because I have made some statistics and I can see a lot of free ram memory. Also I have tryied to run some statistics and I can see that my app has consumed 380 megs of virtual memory and 45 megs of resident memory. I have turned on zRAM and it is not using any zRAM pages. Moving from Raspi 3b+ to Raspi 4 with 4GB may help?
  • Run on Android thread

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    @Pablo-J-Rogina Yes, I know how to implement it. It is in the guide. I'm just wondering when I have to use this approach and when not. @mvuori Thank you. In Qt it is quite clear for me what is UI and what not. If my application isn't in foreground, I don't touch the QML part. In Android it isn't that clear. If you check the guide, it describes how to set SD card (un)mount listener. I would say this has nothing to do with the UI. I'm wondering if my approach to show foreground service is correct or not. Currently I use this method to show it: public class MuzikaServiceOld extends QtService { private Handler handler; @Override public void onCreate() { super.onCreate(); handler = new Handler(); } public void showNotification(String text) { runOnUiThread(new MyNotification(this, text)); } private void runOnUiThread(Runnable runnable) { handler.post(runnable); } } The class MyNotification in the run() method creates and shows the notification. The question is, if this is a correct solution, because I create a new instance of the notification each time I change it. The second possibility is this: public class MuzikaServiceOld extends QtService { NotificationManager mNotificationManager; @Override public void onCreate() { super.onCreate(); mNotificationManager = new MyNotification(this); } public void showNotification(String text) { mNotificationManager.update(text); } } This works too but in this case I'm not showing and updating the notification from Android UI thread. But I don't create a new instance on every change. So the question is, which of these two solutions is better and which can lead to some problems. I hope this example explains better my question.
  • How do I prompt the launch of an Android Service in the background (Qt5.7)?

    Unsolved 5.7 android service
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    @eiriham Were you able to get this question answered? My application is using QAndroidService and I would like to run code from Qt/c++? Thanks
  • Screen.orientation does not update on Android

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  • Qt Android and MediaBrowser Service

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    I've just run into the same problem. Have you found any solution for it?
  • QAndroidBinder vs AIDL

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  • QPushButton stay pressed after released finger

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    Hi, Has anyone ever encountered this problem? Is there a function to see if the smartphone screen is pressed or touched? I could possibly check every 100ms for example if the screen is touched or not to disable the key screen is not touched. What do you think ? thanks
  • only one QPushButton with QWidget works

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    K-StrK
    Hello, I give up to install Qt Creator for remote development. It's like "Sisyphean task". Now I installed Qt on my Raspberry and here I try to do my work. I use the RemoteDesktop. It seems it works for me. Thanks a lot to all helpers.
  • Implement media browser on Android

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  • Android BLE services not discovered

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    @J-Hilk Pairing and bonding is well defined in Bluetooth standard. Bonding means securing connection and storing the keys used to secure the connection permanently on both sides so they can be reused later.
  • Android unauthorized access to library

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  • This topic is deleted!

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  • Problem rendering 3D mesh in embedded device

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    SGaistS
    Are you building the application directly on the module ?
  • Qt Quick Ultralite

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    Pablo J. RoginaP
    @PR1G0RYAN said in Qt Quick Ultralite: Will try something different for STM I'd love to hear what other options you're considering. Please share your findings. Thanks.
  • HTML5 video tags and extensions support in QT 5

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    jsulmJ
    @HelenG Do you mean Qt Web Engine? See https://doc.qt.io/qt-5/qtwebengine-features.html#
  • Ignore/disable all stylesheet on run time

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    nima.latifiN
    @mrjj It is unbelievable, heavy use of style-sheets makes my program run very slowly. i think "linuxfb" repaint all styles in each frame and make it slowly. now i am removing all stylesheets and re design program. :-(
  • 0 Votes
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    SGaistS
    Ensure that you deployed your cross-compiled Qt version on the device.
  • Inherited QGuiApplication object do not working on iOS Simulator. Why?

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    @kshegunov said in Inherited QGuiApplication object do not working on iOS Simulator. Why?: I believe I've already answered this. Sure, write an answer without explanation based on difference between Qt sources for different platform. And the problem is in QCoreApplication and how constructor calling from inherited class and possible in moc. Found cause of it by my own in Qt Sources. Issue closed.