Push Notifications in QT

Robin Hood

Yes I understand. When my application is closed, the messages are only displayed in the message bar. And when I press the message, my application starts, but it does not receive the message itself. What can I do to see the message in my application as well?

If I receive a message while the application is in the background and I click on it, then "void MessageListener :: OnMessage (const messaging :: Message & message)" will be started, but "message.notification" will be false. Only "message.notification_opened" is true, whereupon the string "launchnotification" is passed, but that is useless.

void MessageListener::OnMessage(const messaging::Message &message)
{
    // When messages are received by the server, they are placed into an
    // internal queue, waiting to be consumed. When ProcessMessages is called,
    // this OnMessage function is called once for each queued message.

    QVariantMap data;

    if (message.notification) {
        if (!message.notification->title.empty()) {
            const QString key = QStringLiteral("nTitle");
            const QString value = QString::fromStdString(message.notification->title.c_str());
            data.insert(key, value);
        }
        if (!message.notification->body.empty()) {
            const QString key = QStringLiteral("nBody");
            const QString value = QString::fromStdString(message.notification->body.c_str());
            data.insert(key, value);
        }
        if (!message.notification->icon.empty()) {
            const QString key = QStringLiteral("nIcon");
            const QString value = QString::fromStdString(message.notification->icon.c_str());
            data.insert(key, value);
        }
        if (!message.notification->tag.empty()) {
            const QString key = QStringLiteral("nTag");
            const QString value = QString::fromStdString(message.notification->tag.c_str());
            data.insert(key, value);
        }
        if (!message.notification->color.empty()) {
            const QString key = QStringLiteral("nColor");
            const QString value = QString::fromStdString(message.notification->color.c_str());
            data.insert(key, value);
        }
        if (!message.notification->sound.empty()) {
            const QString key = QStringLiteral("nSound");
            const QString value = QString::fromStdString(message.notification->sound.c_str());
            data.insert(key, value);
        }
        if (!message.notification->click_action.empty()) {
            const QString key = QStringLiteral("nClickAction");
            const QString value = QString::fromStdString(message.notification->click_action.c_str());
            data.insert(key, value);
        }
    }

    if (message.notification_opened) {
        const QString key = QStringLiteral("launchnotification");
        data.insert(key, true);
    }

    for (const auto& field : message.data)
    {
        const QString key = QString::fromStdString(field.first);
        const QString value = QString::fromStdString(field.second);

        data.insert(key, value);
    }

    setData(data);
}

Although it says, "As a workaround, we override onNewIntent so that the intent is passed to the C ++ Library Service, which forwards the data to the native C ++ messaging library."
...?

    /**
       * Workaround for when a message is sent containing both a Data and Notification payload.
       *
       * When the app is in the foreground all data payloads are sent to the method
       * `::firebase::messaging::Listener::OnMessage`. However, when the app is in the background, if a
       * message with both a data and notification payload is receieved the data payload is stored on
       * the notification Intent. NativeActivity does not provide native callbacks for onNewIntent, so
       * it cannot route the data payload that is stored in the Intent to the C++ function OnMessage. As
       * a workaround, we override onNewIntent so that it forwards the intent to the C++ library's
       * service which in turn forwards the data to the native C++ messaging library.
       */
    @Override
    protected void onNewIntent(Intent intent) {
        // If we do not have a 'from' field this intent was not a message and should not be handled. It
        // probably means this intent was fired by tapping on the app icon.

        // TODO
        Bundle extras = intent.getExtras();
        String from = extras.getString(EXTRA_FROM);
        String messageId = extras.getString(EXTRA_MESSAGE_ID_KEY);

        if (messageId == null) {
            messageId = extras.getString(EXTRA_MESSAGE_ID_KEY_SERVER);
        }

        if (from != null && messageId != null) {
            Intent message = new Intent(this, MessageForwardingService.class);
            message.setAction(MessageForwardingService.ACTION_REMOTE_INTENT);
            message.putExtras(intent);
            startService(message);
        }
        setIntent(intent);

    }

kuzulis

@Robin-Hood said in Push Notifications in QT:

but it does not receive the message itself. What can I do to see the message in my application as well?

Hmm. For me when the OnMessage is called (when I click on the message in messages bar) the ::firebase::messaging::Message contains all required fields like (title, body and so on).

Do you have an 'google-services.json' and appropriate content in 'build.gradle' files?

Robin Hood

Yes. So I downloaded google-services.json from Firebase and 'build.gradle' from GitHub from QtFirebase.

mmh send your content of 'build.gradle' here. Maybe that brings something ...

kuzulis

@Robin-Hood said in Push Notifications in QT:

mmh send your content of 'build.gradle' here.

buildscript {
    repositories {
        jcenter()
        google()
        maven { url 'https://maven.google.com' }
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.3'
        classpath 'com.google.gms:google-services:4.0.2'
    }
}

allprojects {
    repositories {
        jcenter()
        google()
        maven { url 'https://maven.google.com' }

        flatDir {
            dirs "$System.env.GOOGLE_FIREBASE_SDK" + "/libs/android"
        }
    }
}

apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.google-services'

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.google.android.gms:play-services-base:15.0.1'
    implementation 'com.google.firebase:firebase-core:16.0.1'
    implementation 'com.google.firebase:firebase-messaging:17.1.0'
    implementation 'com.google.firebase.messaging.cpp:firebase_messaging_cpp@aar'
}

android {
    /*******************************************************
     * The following variables:
     * - androidBuildToolsVersion,
     * - androidCompileSdkVersion
     * - qt5AndroidDir - holds the path to qt android files
     *                   needed to build any Qt application
     *                   on Android.
     *
     * are defined in gradle.properties file. This file is
     * updated by QtCreator and androiddeployqt tools.
     * Changing them manually might break the compilation!
     *******************************************************/

    compileSdkVersion androidCompileSdkVersion.toInteger()

    buildToolsVersion androidBuildToolsVersion

    sourceSets {
        main {
            manifest.srcFile 'AndroidManifest.xml'
            java.srcDirs = [qt5AndroidDir + '/src', 'src', 'java']
            aidl.srcDirs = [qt5AndroidDir + '/src', 'src', 'aidl']
            res.srcDirs = [qt5AndroidDir + '/res', 'res']
            resources.srcDirs = ['src']
            renderscript.srcDirs = ['src']
            assets.srcDirs = ['assets']
            jniLibs.srcDirs = ['libs']
       }
    }

    lintOptions {
        abortOnError false
    }

    applicationVariants.all { variant ->
        variant.outputs.all {
            outputFileName = "../" + outputFileName
        }
    }
}

Robin Hood

Unfortunately that did not work. I am now trying to continue my project using qtcloudmessaging
In the instructions it says under point 5:
"First install QtCloudMessaging from the command line:
qmake "CONFIG + = Embedded-Kaltiot Firebase" make make install "

I do not know how do I install it from the command line. ... I use windows 10

Robin Hood

So I think I found where it is to install QtCloudMessaging. You can see it in the first picture. I hope that was right.
But the compiler is still nagging :/

I have copy the compiler report:

C:\Users\Robin\QtProjects\build-qtcloudmessaging-Android_f_r_armeabi_v7a_GCC_4_9_Qt_5_11_1_for_Android_armv7-Debug\lib\libQt5CloudMessaging.so konnte nicht gefunden werden
move libQt5CloudMessaging.so ..\..\lib\ 
process_begin: CreateProcess(NULL, move libQt5CloudMessaging.so "..\..\lib ", ...) failed.
make (e=2): Das System kann die angegebene Datei nicht finden.

make[2]: [..\..\lib\libQt5CloudMessaging.so] Error 2 (ignored)

…

C:\Users\Robin\QtProjects\qtcloudmessaging\src\cloudmessagingembeddedkaltiot\qcloudmessagingembeddedkaltiotclient.cpp
In file included from C:\Users\Robin\QtProjects\qtcloudmessaging\src\cloudmessagingembeddedkaltiot\qcloudmessagingembeddedkaltiotclient.cpp:29:0:
C:\Users\Robin\QtProjects\qtcloudmessaging\src\cloudmessagingembeddedkaltiot\qcloudmessagingembeddedkaltiotclient.h:32:45: fatal error: QtCloudMessaging/QtCloudMessaging: No such file or directory
#include <QtCloudMessaging/QtCloudMessaging>
^
compilation terminated.
make[2]: *** [.obj\qcloudmessagingembeddedkaltiotclient.obj] Error 1
make[1]: *** [sub-cloudmessagingembeddedkaltiot-make_first] Error 2
make[2]: Leaving directory `C:/Users/Robin/QtProjects/build-qtcloudmessaging-Android_f_r_armeabi_v7a_GCC_4_9_Qt_5_11_1_for_Android_armv7-Debug/src/cloudmessagingembeddedkaltiot'
make[1]: Leaving directory `C:/Users/Robin/QtProjects/build-qtcloudmessaging-Android_f_r_armeabi_v7a_GCC_4_9_Qt_5_11_1_for_Android_armv7-Debug/src'
make: *** [sub-src-make_first] Error 2
16:12:54: Der Prozess "C:\Users\Robin\android-ndk-r17b\prebuilt\windows-x86_64\bin\make.exe" wurde mit dem Rückgabewert 2 beendet.
Fehler beim Erstellen/Deployment des Projekts qtcloudmessaging (Kit: Android für armeabi-v7a (GCC 4.9, Qt 5.11.1 for Android armv7))
Bei der Ausführung von Schritt "Make"

If you want to help me, I think it would be easiest if you look at the manual -> qtcloudmessaging
:)

Here are three more pictures. Maybe they will help you with troubleshooting:

1_1537282114782_Screenshot (13).png

2_1537282114782_Screenshot (14).png

0_1537282114780_Screenshot (12).png

jsulm

@Robin-Hood Did you add include/lib locations for qtcloudmessaging in your pro file?

Robin Hood

@jsulm

I do not know. Where would I have to add that and how would that look exactly?

jsulm

@Robin-Hood Take a look at "Linking your application against the shared library" chapter in https://wiki.qt.io/How_to_create_a_library_with_Qt_and_use_it_in_an_application

Robin Hood

@jsulm
I do not see any libs I could add. I have done it as it says in the instructions under point 6.
Here is the link to the instructions: QtCloudMessaging
So I wrote the code to several pro files:
QT + = cloud messaging
QT + = cloudmessagingfirebase

Before that, I added the code in my qmake scribt:
"CONFIG + = firebase",
as I the instructions under point 1 stands.
If you scroll something up, you can see it in the first picture.

jsulm

@Robin-Hood said in Push Notifications in QT:

QT + = cloud messaging

it should be

QT + = cloudmessaging

Shouldn't you do the include like this

#include <QtCloudMessaging>

?

Robin Hood

@jsulm

Yes, I was just prescribed. That's what I wrote in the code. I just downloaded the package from Githup and followed the instructions ...

Robin Hood

Hello,

I would like to integrate the existing Qt project QtFirebase Example in another Qt project. I thought about a solution via libs (libaries). When it exists a simple method, for example with libs or other, I'm grateful for comments. Otherwise I know that you can subdivide via subdir, but I would need a step by step statement.

To clarify again, my point is to include push notifications in an existing Qt project. I've done the QtFirebase Example and I can get push notifications. Now I would like to integrate this functionality into another project. As mentioned earlier, it would be best if I clicked "Add to Library" within another project and the push notification feature is added.

Surely there must be a possibility, I am convinced of that. Request for feedback.