androidconnectivitymanager.cpp

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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "androidconnectivitymanager.h"
 
#include <QtCore/qcoreapplication.h>
#include <QtCore/qjnienvironment.h>
 
QT_BEGIN_NAMESPACE
 
using namespace QNativeInterface;
 
struct AndroidConnectivityManagerInstance
{
    AndroidConnectivityManagerInstance() : connManager(new AndroidConnectivityManager) { }
    std::unique_ptr<AndroidConnectivityManager> connManager = nullptr;
};
Q_GLOBAL_STATIC(AndroidConnectivityManagerInstance, androidConnManagerInstance)
 
static const char networkInformationClass[] =
        "org/qtproject/qt/android/networkinformation/QtAndroidNetworkInformation";
 
static void networkConnectivityChanged(JNIEnv *env, jobject obj, jint enumValue)
{
    Q_UNUSED(env);
    Q_UNUSED(obj);
    const auto connectivity =
            static_cast<AndroidConnectivityManager::AndroidConnectivity>(enumValue);
    Q_EMIT androidConnManagerInstance->connManager->connectivityChanged(connectivity);
}
Q_DECLARE_JNI_NATIVE_METHOD(networkConnectivityChanged)
 
static void genericInfoChanged(JNIEnv *env, jobject obj, jboolean captivePortal, jboolean metered)
{
    Q_UNUSED(env);
    Q_UNUSED(obj);
    Q_EMIT androidConnManagerInstance->connManager->captivePortalChanged(captivePortal);
    Q_EMIT androidConnManagerInstance->connManager->meteredChanged(metered);
}
Q_DECLARE_JNI_NATIVE_METHOD(genericInfoChanged)
 
static void transportMediumChanged(JNIEnv *env, jobject obj, jint enumValue)
{
    Q_UNUSED(env);
    Q_UNUSED(obj);
    const auto transport = static_cast<AndroidConnectivityManager::AndroidTransport>(enumValue);
    emit androidConnManagerInstance->connManager->transportMediumChanged(transport);
}
Q_DECLARE_JNI_NATIVE_METHOD(transportMediumChanged)
 
Q_DECLARE_JNI_CLASS(ConnectivityManager, "android/net/ConnectivityManager")
 
AndroidConnectivityManager::AndroidConnectivityManager()
{
    if (!registerNatives())
        return;
 
    QJniObject::callStaticMethod<void>(networkInformationClass, "registerReceiver",
                                       QAndroidApplication::context());
}
 
AndroidConnectivityManager *AndroidConnectivityManager::getInstance()
{
    if (!androidConnManagerInstance())
        return nullptr;
    return androidConnManagerInstance->connManager->isValid()
            ? androidConnManagerInstance->connManager.get()
            : nullptr;
}
 
bool AndroidConnectivityManager::isValid() const
{
    return registerNatives();
}
 
AndroidConnectivityManager::~AndroidConnectivityManager()
{
    QJniObject::callStaticMethod<void>(networkInformationClass, "unregisterReceiver",
                                       QAndroidApplication::context());
}
 
bool AndroidConnectivityManager::registerNatives() const
{
    static const bool registered = []() {
        QJniEnvironment env;
        return env.registerNativeMethods(networkInformationClass, {
            Q_JNI_NATIVE_METHOD(networkConnectivityChanged),
            Q_JNI_NATIVE_METHOD(genericInfoChanged),
            Q_JNI_NATIVE_METHOD(transportMediumChanged),
        });
    }();
    return registered;
}
 
QT_END_NAMESPACE
 
#include "moc_androidconnectivitymanager.cpp"