[ANDROID] Network request with the service that starts at boot time



  • Hello,
    I implemented simple android service that starts at boot time based on https://www.kdab.com/qt-android-create-android-service-using-qt/

    Now, I have problem with network request - status code 0 - only with service that starts at boot time :(
    Simple code of server:

    #include <QAndroidService>
    #include "rep_pingpong_source.h"
    
    #include <QObject>
    #include <QString>
    #include <QNetworkAccessManager>
    #include <QNetworkReply>
    #include <QNetworkRequest>
    
    QString statusCode = "-";
    
    class PingPong : public PingPongSource {
    public slots:
        // PingPongSource interface
        void ping(const QString &msg) override {
            emit pong("Status code: " + statusCode);
        }
    };
    
    int main(int argc, char *argv[])
    {
        QAndroidService app(argc, argv);
    
        QRemoteObjectHost srcNode(QUrl(QStringLiteral("local:replica")));
        PingPong pingPongServer;
        srcNode.enableRemoting(&pingPongServer);
    
        auto networkManager = new QNetworkAccessManager();
        QObject::connect(networkManager, &QNetworkAccessManager::finished,
                [](QNetworkReply* reply){ statusCode = QString::number(reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt()); });
    
        QByteArray rawDataToSend = "{}";
        QByteArray postDataSize = QByteArray::number(rawDataToSend.size());
        QNetworkRequest networkRequest(QUrl("http://example.com/"));
    
        // Header
        networkRequest.setRawHeader("User-Agent", "test");
        networkRequest.setRawHeader("X-Custom-User-Agent", "test");
        networkRequest.setRawHeader("Content-Type", "application/json");
        networkRequest.setRawHeader("Content-Length", postDataSize);
    
        networkManager->post(networkRequest, rawDataToSend);
    
        return app.exec();
    }
    
    

    AndroidManifest.xml:

    <?xml version="1.0"?>
    <manifest package="com.kdab.training" xmlns:android="http://schemas.android.com/apk/res/android" android:versionName="1.0" android:versionCode="1" android:installLocation="auto">
        <application android:hardwareAccelerated="true" android:name="org.qtproject.qt5.android.bindings.QtApplication" android:label="-- %%INSERT_APP_NAME%% --">
            <activity android:configChanges="orientation|uiMode|screenLayout|screenSize|smallestScreenSize|layoutDirection|locale|fontScale|keyboard|keyboardHidden|navigation" android:name="org.qtproject.qt5.android.bindings.QtActivity" android:label="-- %%INSERT_APP_NAME%% --" android:screenOrientation="unspecified" android:launchMode="singleTop">
                <intent-filter>
                    <action android:name="android.intent.action.MAIN"/>
                    <category android:name="android.intent.category.LAUNCHER"/>
                </intent-filter>
    
                <!-- Application arguments -->
                <!-- meta-data android:name="android.app.arguments" android:value="arg1 arg2 arg3"/ -->
                <!-- Application arguments -->
    
                <meta-data android:name="android.app.lib_name" android:value="client"/>
                <meta-data android:name="android.app.qt_sources_resource_id" android:resource="@array/qt_sources"/>
                <meta-data android:name="android.app.repository" android:value="default"/>
                <meta-data android:name="android.app.qt_libs_resource_id" android:resource="@array/qt_libs"/>
                <meta-data android:name="android.app.bundled_libs_resource_id" android:resource="@array/bundled_libs"/>
                <!-- Deploy Qt libs as part of package -->
                <meta-data android:name="android.app.bundle_local_qt_libs" android:value="-- %%BUNDLE_LOCAL_QT_LIBS%% --"/>
                <meta-data android:name="android.app.bundled_in_lib_resource_id" android:resource="@array/bundled_in_lib"/>
                <meta-data android:name="android.app.bundled_in_assets_resource_id" android:resource="@array/bundled_in_assets"/>
                <!-- Run with local libs -->
                <meta-data android:name="android.app.use_local_qt_libs" android:value="-- %%USE_LOCAL_QT_LIBS%% --"/>
                <meta-data android:name="android.app.libs_prefix" android:value="/data/local/tmp/qt/"/>
                <meta-data android:name="android.app.load_local_libs" android:value="-- %%INSERT_LOCAL_LIBS%% --"/>
                <meta-data android:name="android.app.load_local_jars" android:value="-- %%INSERT_LOCAL_JARS%% --"/>
                <meta-data android:name="android.app.static_init_classes" android:value="-- %%INSERT_INIT_CLASSES%% --"/>
                <!--  Messages maps -->
                <meta-data android:value="@string/ministro_not_found_msg" android:name="android.app.ministro_not_found_msg"/>
                <meta-data android:value="@string/ministro_needed_msg" android:name="android.app.ministro_needed_msg"/>
                <meta-data android:value="@string/fatal_error_msg" android:name="android.app.fatal_error_msg"/>
                <!--  Messages maps -->
    
                <!-- Splash screen -->
                <!-- meta-data android:name="android.app.splash_screen_drawable" android:resource="@drawable/logo"/ -->
                <!-- meta-data android:name="android.app.splash_screen_sticky" android:value="true"/ -->
                <!-- Splash screen -->
    
                <!-- Background running -->
                <!-- Warning: changing this value to true may cause unexpected crashes if the
                              application still try to draw after
                              "applicationStateChanged(Qt::ApplicationSuspended)"
                              signal is sent! -->
                <meta-data android:name="android.app.background_running" android:value="false"/>
                <!-- Background running -->
    
                <!-- auto screen scale factor -->
                <meta-data android:name="android.app.auto_screen_scale_factor" android:value="false"/>
                <!-- auto screen scale factor -->
    
                <!-- extract android style -->
                <!-- available android:values :
                    * full - useful QWidget & Quick Controls 1 apps
                    * minimal - useful for Quick Controls 2 apps, it is much faster than "full"
                    * none - useful for apps that don't use any of the above Qt modules
                    -->
                <meta-data android:name="android.app.extract_android_style" android:value="full"/>
                <!-- extract android style -->
        </activity>
    
        <receiver android:name="com.kdab.training.MyActivity">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED" />
            </intent-filter>
        </receiver>
    
        <service android:process=":qt" android:name="com.kdab.training.MyService">
        <!-- android:process=":qt" is needed to force the service to run on a separate process than the Activity -->
    
            <!-- Application arguments -->
            <meta-data android:name="android.app.arguments" android:value="-service"/>
            <!-- Application arguments -->
    
            <!-- If you are using the same application (.so file) for activity and also for service, then you
                 need to use *android.app.arguments* to pass some arguments to your service in order to know which
                 one is which
            -->
    
            <!-- Ministro -->
            <meta-data android:name="android.app.lib_name" android:value="server"/>
            <meta-data android:name="android.app.qt_sources_resource_id" android:resource="@array/qt_sources"/>
            <meta-data android:name="android.app.repository" android:value="default"/>
            <meta-data android:name="android.app.qt_libs_resource_id" android:resource="@array/qt_libs"/>
            <meta-data android:name="android.app.bundled_libs_resource_id" android:resource="@array/bundled_libs"/>
            <!-- Ministro -->
    
            <!-- Deploy Qt libs as part of package -->
            <meta-data android:name="android.app.bundle_local_qt_libs" android:value="-- %%BUNDLE_LOCAL_QT_LIBS%% --"/>
            <meta-data android:name="android.app.bundled_in_lib_resource_id" android:resource="@array/bundled_in_lib"/>
            <meta-data android:name="android.app.bundled_in_assets_resource_id" android:resource="@array/bundled_in_assets"/>
            <!-- Deploy Qt libs as part of package -->
    
            <!-- Run with local libs -->
            <meta-data android:name="android.app.use_local_qt_libs" android:value="-- %%USE_LOCAL_QT_LIBS%% --"/>
            <meta-data android:name="android.app.libs_prefix" android:value="/data/local/tmp/qt/"/>
            <meta-data android:name="android.app.load_local_libs" android:value="-- %%INSERT_LOCAL_LIBS%% --"/>
            <meta-data android:name="android.app.load_local_jars" android:value="-- %%INSERT_LOCAL_JARS%% --"/>
            <meta-data android:name="android.app.static_init_classes" android:value="-- %%INSERT_INIT_CLASSES%% --"/>
            <!-- Run with local libs -->
    
            <!--  Messages maps -->
            <meta-data android:value="@string/ministro_not_found_msg" android:name="android.app.ministro_not_found_msg"/>
            <meta-data android:value="@string/ministro_needed_msg" android:name="android.app.ministro_needed_msg"/>
            <meta-data android:value="@string/fatal_error_msg" android:name="android.app.fatal_error_msg"/>
            <!--  Messages maps -->
    
    
            <!-- Background running -->
            <meta-data android:name="android.app.background_running" android:value="true"/>
            <!-- Background running -->
        </service>
    
        </application>
    
        <uses-permission android:name="android.permission.SEND_SMS"/>
        <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
        <uses-sdk android:minSdkVersion="16" android:targetSdkVersion="16"/>
        <supports-screens android:largeScreens="true" android:normalScreens="true" android:anyDensity="true" android:smallScreens="true"/>
    
        <!-- The following comment will be replaced upon deployment with default permissions based on the dependencies of the application.
             Remove the comment if you do not require these default permissions. -->
        <!-- %%INSERT_PERMISSIONS -->
    
        <!-- The following comment will be replaced upon deployment with default features based on the dependencies of the application.
             Remove the comment if you do not require these default features. -->
        <!-- %%INSERT_FEATURES -->
    
    </manifest>
    
    

    server.pro:

    TEMPLATE = lib
    TARGET = server
    CONFIG += dll
    QT += core
    QT += remoteobjects
    QT += androidextras
    QT += network
    
    SOURCES += \
        server.cpp
    
    REPC_SOURCE += pingpong.rep
    
    

    Package of project to download:
    https://1drv.ms/u/s!AufN-y--ppMkvD5NG3bf4HQlExqn

    p.s.
    After install app You have to restart system (service starts only at boot time)!

    Qt: 5.11.2
    Android 5.1 Lollipop
    SDK:26.1.1
    NDK: 16.1

    #edit
    I also added
    <uses-permission android:name="android.permission.INTERNET"/>
    after: <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>

    and no changes.



  • Generally, I wouldn't be surprised of such failure immediately after booting, when some subsystems may still be doing their thing. So, I would put a timer and wait for a while, and do a couple of retries.



  • After 15 minutes I still have error :/


  • Moderators

    @Montjet
    you can use QNetworkConfigurationManager::isOnline() before submitting the request.
    On Android true is returned either when you are connected to a WiFi or cellular network.



  • @raven-worx said in [ANDROID] Network request with the service that starts at boot time:

    QNetworkConfigurationManager::isOnline()

    QNetworkConfigurationManager::isOnline() and it's signal returns false all the time.


  • Moderators

    @Montjet said in [ANDROID] Network request with the service that starts at boot time:

    QNetworkConfigurationManager::isOnline() and it's signal returns false all the time.

    it doesn't on my side.
    Are you sure you are not missing the network permissions?



  • Ye, different device and it works properly ;(
    But question is why it doesn't work on my device - Xiaomi redmi note 3.
    It seems that all privileges are granted.


  • Moderators

    @Montjet
    what does logcat say?



  • It works properly... now.


  • Moderators

    @Montjet
    what was the issue?
    Maybe it helps others in the future.


  • Banned

    This post is deleted!


  • I changed battery saver mode to no restrictions :)


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