Unique android device id

[m.kuncevicius]

Hello. How to get unique android device id?

[tekojo]

Hi @m-kuncevicius

I'm not a mobile developer, but this thread seems to have a good answer:
https://forum.qt.io/topic/75670/i-need-to-get-a-serial-number-of-device

Do note, that the Device id can change if the end user wipes their device.

[m.kuncevicius]

@tekojo Thanks for link. I'm going to use Secure Android ID (Device Id). Also I found a good article about it. How to retrieve an Unique ID to identify Android devices ?

[delamor]

Hello all, I'm doing something like that, just in case is helpfull for someone; this tries to got MAC, then ANDROID_ID then RandomId and return sha1 hash of this number. Also I'm saving it somewhere just in case I'm working in a device which doesn't has MAC neither ANDROID_ID and because of that I'm working just with random id.

QString AndroidUtils::_getAndroidUuid(){

    // Trying to get MAC Address
    Q_FOREACH(QNetworkInterface netInterface, QNetworkInterface::allInterfaces())
    {
        // Return only the first non-loopback MAC Address
        if (!(netInterface.flags() & QNetworkInterface::IsLoopBack))
        {
            QString macAddress = netInterface.hardwareAddress();

            // On Android 6 you cannot retrieve MAC address with regular way, this is a workaround for getting it.
            if(macAddress.isEmpty()){

                qDebug()<< Q_FUNC_INFO <<"MAC address cannot be retrieved with regular way, trying to obtain it from: /sys/class/net/"+netInterface.name()+"/address";

                QFile macFile("/sys/class/net/"+netInterface.name()+"/address");

                if (macFile.open(QFile::ReadOnly)){
                    QTextStream textStream(&macFile);
                    macAddress= QString(textStream.readLine());
                    macFile.close();
                }
            }

            if(!macAddress.isEmpty()&&!macAddress.endsWith("02:00:00:00:00:00")){
                qDebug()<< Q_FUNC_INFO <<"Using MAC address"<<macAddress;
                return _getSha1Hash(macAddress);
            }

             qDebug()<< Q_FUNC_INFO <<"MAC Address is:"<<macAddress;
        }
    }


    // Trying to get ANDROID_ID from system
    QAndroidJniObject myID = QAndroidJniObject::fromString("android_id");
    QAndroidJniObject activity = QAndroidJniObject::callStaticObjectMethod("org/qtproject/qt5/android/QtNative", "activity", "()Landroid/app/Activity;");
    QAndroidJniObject appctx = activity.callObjectMethod("getApplicationContext","()Landroid/content/Context;");
    QAndroidJniObject contentR = appctx.callObjectMethod("getContentResolver", "()Landroid/content/ContentResolver;");

    QAndroidJniObject androidId = QAndroidJniObject::callStaticObjectMethod("android/provider/Settings$Secure","getString",
                                                                         "(Landroid/content/ContentResolver;Ljava/lang/String;)Ljava/lang/String;",
                                                                         contentR.object<jobject>(),
                                                                         myID.object<jstring>());
    if(!_isJvmException()){
        if(androidId.isValid() && !androidId.toString().isEmpty()){
            if(androidId.toString().endsWith("9774d56d682e549c")){
                qWarning()<< Q_FUNC_INFO <<"This device has the bug with unique id"; //https://code.google.com/p/android/issues/detail?id=10603
            }else{
                qDebug()<< Q_FUNC_INFO <<"Using androidId"<<androidId.toString();
                return _getSha1Hash(androidId.toString());
            }
        }
    }

    qDebug()<< Q_FUNC_INFO <<"Using randomUuid";
    return _getSha1Hash(QUuid::createUuid().toString());

}

[ekkescorner]

@delamor cool - thanks for your solution. In an upcoming app I'll need this.
do you also have something similar for iOS ?

[GTDev]

Hi all,
V-Play Engine also allows to use a Unique Device ID, with different implementations to retrieve a unique id on each target platform.

import VPlayApps 1.0

App {
  AppText {
    text: "Device Id: " + system.UDID
  }
}

Best,
GT

[Aleksey_K 0]

@ekkescorner do you have the code for this on some of Your Github repos?

[ekkescorner]

@Aleksey_K-0 I'm using instance IDs. works on Android, iOS, W10, ...
see also https://developer.android.com/training/articles/user-data-ids

[Aleksey_K 0]

@ekkescorner so You just create random UUID once and store it on the device forever?

[ekkescorner]

@Aleksey_K-0 yep. store at app data location