Mobile and Embedded

FYI: the issues vanished with the previous version Qt 5.14.2 and the 7.5.0 Linaro toolchain (but not the others!). Suddenly the tests are being run. My cross development toolchain now is up and running, however, I still find it odd that there are no error messages in Qt's build system.

@jsulm thank you

@jsulm thanks. On Android 6.0, I run the binary program with root privileges, but crash at the point "backtrace:/system/lib/libc.so". But the same binary program runs successfully on Android 5.1, while Android 5.1 uses openssl. Android 6.0 uses borningssl, not openssl.

@JonB i know that table . it happens but some time it comes -1 or last inserted id of 2nd table instead 1st table's last inserted id

@jsulm thank you

@MABahar said in slowly memory leakage durring linux-based process running: i think that Valgrind can not be used on ARM arch. is it wrong ? But even if it's not (I don't know) I guess that you could give it a try running your application under Linux for x86 for instance. That way if it's a "basic" or "common" leak (no OS dependent), you could still have some insights from that tool

I encountered this issue. I use rsync to copy the update /usr/lib, /usr/include, /lib folder from the machine with jetson-tx2 to the machine with ubuntu. The actual paths of the symlink files point to were broken. You need to corrrect the linked path of symlink file and re-compile

No, QtMultimedia uses different plugins depending on the platform. In the case that interests you, you will need the plugin based on GStreamer. So you need two things: GStreamer built for Androïd The QtMultimedia plugin using GStreamer You do not need to build Qt completely for that, just the plugin.

@Sumit i am also facing same problem plz guide me to fix this problem

@jsulm Yes, when the apk get deploy it ask permission to access camera and record video. I given the permissions. I also design a new application to access camera and give camera and storage permissions in AndroidManifesto.xml file. but it also giving same issue.

I remember I had a similar issue on Android a few years ago. I switched to Screen.width and Screen.height.

@Kyeiv said in Convert Android Java String[] array to C++ vector<string>: Having stringArray how to convert it to vector<string>? You can do it like this: QAndroidJniEnvironment jniEnv; QStringList stringList; if(stringArray.isValid()) { const jobjectArray stringListObjArray = stringArray.object<jobjectArray>(); const int arraySize= jniEnv->GetArrayLength(stringListObjArray ); for(int idx = 0; idx < arraySize; ++idx) { const QAndroidJniObject stringObj = QAndroidJniObject::fromLocalRef(jniEnv->GetObjectArrayElement(stringListObjArray , idx)); stringList << stringObj .toString(); } }

@JonB sorry for late reply. you suggestion worked well. i followed https://wiki.qt.io/WIP-How_to_create_a_simple_chat_application and modified my code according to that. now at sender side looks like this QJsonDocument doc1; QFile j("/home/first.JSON"); if(j.exists()) { if(j.open(QIODevice:: ReadOnly| QIODevice::Text)) { jstr=j.readAll(); doc1= QJsonDocument::fromJson(jstr.toUtf8()); } j.close(); QDataStream clientStream(socket); clientStream.setVersion(QDataStream::Qt_5_7); // Create the JSON we want to send QJsonObject message; message[QStringLiteral("type")] = QStringLiteral("message"); clientStream << QJsonDocument(doc1).toJson(); } } else { ui->l_err->show(); ui->l_err->setText("Connection refused. Please check server."); } and used server application from the link above at receiver end. this works well. I have tested this with JSON file having 3000 object. Will this work for 50,000 samples and more possibly 1500000 objects?

particle.red = var_r; // must be a float value 0..1 particle.green = var_g; // must be a float value 0..1 particle.blue = var_b; // must be a float value 0..1

@Pablo-J-Rogina i looked through its documentation and i am afraid that it returns only internal storage paths.

@SGaist sure, will do :)

@mrjj embeded linux.libxcb1.14