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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
package org.qtproject.qt.android.networkinformation;
import android.annotation.SuppressLint;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.ConnectivityManager.NetworkCallback;
import android.net.NetworkRequest;
import android.net.NetworkCapabilities;
import android.net.Network;
import android.os.Build;
public class QtAndroidNetworkInformation {
private static final String LOG_TAG = "QtAndroidNetworkInformation";
private static native void connectivityChanged(AndroidConnectivity connectivity);
private static native void genericInfoChanged(boolean captivePortal, boolean metered);
private static native void transportMediumChanged(Transport transportMedium);
private static QtNetworkInformationCallback m_callback = null;
private static final Object m_lock = new Object();
// Keep synchronized with AndroidConnectivity in androidconnectivitymanager.h
enum AndroidConnectivity {
Connected, Unknown, Disconnected
}
// Keep synchronized with AndroidTransport in androidconnectivitymanager.h
enum Transport {
Unknown,
Bluetooth,
Cellular,
Ethernet,
LoWPAN,
Usb,
WiFi,
WiFiAware,
}
private static class QtNetworkInformationCallback extends NetworkCallback {
public AndroidConnectivity previousState = null;
public Transport previousTransport = null;
QtNetworkInformationCallback() {
}
@Override
public void onCapabilitiesChanged(Network network, NetworkCapabilities capabilities) {
AndroidConnectivity s;
if (!capabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET))
s = AndroidConnectivity.Disconnected;
else if (capabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED))
s = AndroidConnectivity.Connected;
else
s = AndroidConnectivity.Unknown; // = we _may_ have Internet access
final Transport transport = getTransport(capabilities);
if (transport == Transport.Unknown) // If we don't have any transport media: override
s = AndroidConnectivity.Unknown;
setState(s);
setTransportMedium(transport);
final boolean captive
= capabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_CAPTIVE_PORTAL);
final boolean metered
= !capabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED);
genericInfoChanged(captive, metered);
}
private Transport getTransport(NetworkCapabilities capabilities)
{
if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) {
return Transport.WiFi;
} else if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)) {
return Transport.Cellular;
} else if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_BLUETOOTH)) {
return Transport.Bluetooth;
} else if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_ETHERNET)) {
return Transport.Ethernet;
} else if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI_AWARE)) {
// Build.VERSION_CODES.O
return Transport.WiFiAware;
} else if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_LOWPAN)) {
// Build.VERSION_CODES.O_MR1
return Transport.LoWPAN;
}/* else if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_USB)) {
// Build.VERSION_CODES.S
return Transport.Usb;
}*/ // @todo: Uncomment once we can use SDK 31
return Transport.Unknown;
}
private void setState(AndroidConnectivity s) {
if (previousState != s) {
previousState = s;
connectivityChanged(s);
}
}
private void setTransportMedium(Transport t) {
if (previousTransport != t) {
previousTransport = t;
transportMediumChanged(t);
}
}
@Override
public void onLost(Network network) {
setState(AndroidConnectivity.Disconnected);
}
}
private QtAndroidNetworkInformation() {
}
public static AndroidConnectivity state() {
if (m_callback != null && m_callback.previousState != null)
return m_callback.previousState;
return AndroidConnectivity.Unknown;
}
@SuppressLint("MissingPermission")
public static void registerReceiver(final Context context) {
synchronized (m_lock) {
if (m_callback == null) {
ConnectivityManager manager = getConnectivityManager(context);
m_callback = new QtNetworkInformationCallback();
NetworkRequest.Builder builder = new NetworkRequest.Builder();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R)
builder = builder.clearCapabilities();
builder = builder.addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
builder = builder.addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_SUSPENDED);
builder = builder.addCapability(NetworkCapabilities.NET_CAPABILITY_FOREGROUND);
}
NetworkRequest request = builder.build();
// Can't use registerDefaultNetworkCallback because it doesn't let us know when
// the network disconnects!
manager.registerNetworkCallback(request, m_callback);
}
}
}
public static void unregisterReceiver(final Context context) {
synchronized (m_lock) {
if (m_callback != null) {
getConnectivityManager(context).unregisterNetworkCallback(m_callback);
m_callback = null;
}
}
}
public static ConnectivityManager getConnectivityManager(final Context context) {
return (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
}
}
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