mirror of https://github.com/NekoX-Dev/NekoX.git
350 lines
12 KiB
Java
350 lines
12 KiB
Java
/*
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* Copyright 2015 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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package org.webrtc;
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import android.content.Context;
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import android.os.Build;
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import androidx.annotation.Nullable;
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import java.util.ArrayList;
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import java.util.List;
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import org.webrtc.NetworkChangeDetector;
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/**
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* Borrowed from Chromium's
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* src/net/android/java/src/org/chromium/net/NetworkChangeNotifier.java
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*
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* <p>Triggers updates to the underlying network state from OS networking events.
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*
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* <p>This class is thread-safe.
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*/
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public class NetworkMonitor {
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/**
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* Alerted when the connection type of the network changes. The alert is fired on the UI thread.
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*/
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public interface NetworkObserver {
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public void onConnectionTypeChanged(NetworkChangeDetector.ConnectionType connectionType);
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}
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private static final String TAG = "NetworkMonitor";
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// Lazy initialization holder class idiom for static fields.
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private static class InstanceHolder {
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// We are storing application context so it is okay.
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static final NetworkMonitor instance = new NetworkMonitor();
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}
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// Factory for creating NetworkChangeDetector.
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private NetworkChangeDetectorFactory networkChangeDetectorFactory =
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new NetworkChangeDetectorFactory() {
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@Override
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public NetworkChangeDetector create(
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NetworkChangeDetector.Observer observer, Context context) {
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return new NetworkMonitorAutoDetect(observer, context);
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}
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};
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// Native observers of the connection type changes.
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private final ArrayList<Long> nativeNetworkObservers;
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// Java observers of the connection type changes.
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private final ArrayList<NetworkObserver> networkObservers;
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private final Object networkChangeDetectorLock = new Object();
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// Object that detects the connection type changes and brings up mobile networks.
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@Nullable private NetworkChangeDetector networkChangeDetector;
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// Also guarded by autoDetectLock.
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private int numObservers;
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private volatile NetworkChangeDetector.ConnectionType currentConnectionType;
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private NetworkMonitor() {
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nativeNetworkObservers = new ArrayList<Long>();
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networkObservers = new ArrayList<NetworkObserver>();
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numObservers = 0;
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currentConnectionType = NetworkChangeDetector.ConnectionType.CONNECTION_UNKNOWN;
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}
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/**
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* Set the factory that will be used to create the network change detector.
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* Needs to be called before the monitoring is starts.
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*/
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public void setNetworkChangeDetectorFactory(NetworkChangeDetectorFactory factory) {
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assertIsTrue(numObservers == 0);
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this.networkChangeDetectorFactory = factory;
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}
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// TODO(sakal): Remove once downstream dependencies have been updated.
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@Deprecated
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public static void init(Context context) {}
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/** Returns the singleton instance. This may be called from native or from Java code. */
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@CalledByNative
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public static NetworkMonitor getInstance() {
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return InstanceHolder.instance;
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}
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private static void assertIsTrue(boolean condition) {
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if (!condition) {
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throw new AssertionError("Expected to be true");
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}
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}
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/**
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* Enables auto detection of the network state change and brings up mobile networks for using
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* multi-networking. This requires the embedding app have the platform ACCESS_NETWORK_STATE and
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* CHANGE_NETWORK_STATE permission.
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*/
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public void startMonitoring(Context applicationContext) {
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synchronized (networkChangeDetectorLock) {
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++numObservers;
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if (networkChangeDetector == null) {
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networkChangeDetector = createNetworkChangeDetector(applicationContext);
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}
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currentConnectionType = networkChangeDetector.getCurrentConnectionType();
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}
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}
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/** Deprecated, pass in application context in startMonitoring instead. */
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@Deprecated
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public void startMonitoring() {
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startMonitoring(ContextUtils.getApplicationContext());
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}
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/**
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* Enables auto detection of the network state change and brings up mobile networks for using
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* multi-networking. This requires the embedding app have the platform ACCESS_NETWORK_STATE and
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* CHANGE_NETWORK_STATE permission.
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*/
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@CalledByNative
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private void startMonitoring(@Nullable Context applicationContext, long nativeObserver) {
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Logging.d(TAG, "Start monitoring with native observer " + nativeObserver);
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startMonitoring(
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applicationContext != null ? applicationContext : ContextUtils.getApplicationContext());
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// The native observers expect a network list update after they call startMonitoring.
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synchronized (nativeNetworkObservers) {
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nativeNetworkObservers.add(nativeObserver);
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}
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updateObserverActiveNetworkList(nativeObserver);
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// currentConnectionType was updated in startMonitoring().
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// Need to notify the native observers here.
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notifyObserversOfConnectionTypeChange(currentConnectionType);
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}
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/**
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* Stop network monitoring. If no one is monitoring networks, destroy and reset
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* networkChangeDetector.
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*/
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public void stopMonitoring() {
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synchronized (networkChangeDetectorLock) {
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if (--numObservers == 0) {
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networkChangeDetector.destroy();
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networkChangeDetector = null;
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}
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}
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}
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@CalledByNative
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private void stopMonitoring(long nativeObserver) {
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Logging.d(TAG, "Stop monitoring with native observer " + nativeObserver);
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stopMonitoring();
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synchronized (nativeNetworkObservers) {
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nativeNetworkObservers.remove(nativeObserver);
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}
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}
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// Returns true if network binding is supported on this platform.
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@CalledByNative
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private boolean networkBindingSupported() {
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synchronized (networkChangeDetectorLock) {
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return networkChangeDetector != null && networkChangeDetector.supportNetworkCallback();
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}
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}
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@CalledByNative
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private static int androidSdkInt() {
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return Build.VERSION.SDK_INT;
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}
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private NetworkChangeDetector.ConnectionType getCurrentConnectionType() {
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return currentConnectionType;
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}
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private NetworkChangeDetector createNetworkChangeDetector(Context appContext) {
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return networkChangeDetectorFactory.create(new NetworkChangeDetector.Observer() {
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@Override
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public void onConnectionTypeChanged(NetworkChangeDetector.ConnectionType newConnectionType) {
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updateCurrentConnectionType(newConnectionType);
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}
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@Override
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public void onNetworkConnect(NetworkChangeDetector.NetworkInformation networkInfo) {
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notifyObserversOfNetworkConnect(networkInfo);
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}
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@Override
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public void onNetworkDisconnect(long networkHandle) {
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notifyObserversOfNetworkDisconnect(networkHandle);
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}
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@Override
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public void onNetworkPreference(
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List<NetworkChangeDetector.ConnectionType> types, int preference) {
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notifyObserversOfNetworkPreference(types, preference);
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}
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}, appContext);
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}
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private void updateCurrentConnectionType(NetworkChangeDetector.ConnectionType newConnectionType) {
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currentConnectionType = newConnectionType;
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notifyObserversOfConnectionTypeChange(newConnectionType);
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}
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/** Alerts all observers of a connection change. */
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private void notifyObserversOfConnectionTypeChange(
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NetworkChangeDetector.ConnectionType newConnectionType) {
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List<Long> nativeObservers = getNativeNetworkObserversSync();
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for (Long nativeObserver : nativeObservers) {
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nativeNotifyConnectionTypeChanged(nativeObserver);
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}
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// This avoids calling external methods while locking on an object.
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List<NetworkObserver> javaObservers;
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synchronized (networkObservers) {
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javaObservers = new ArrayList<>(networkObservers);
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}
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for (NetworkObserver observer : javaObservers) {
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observer.onConnectionTypeChanged(newConnectionType);
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}
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}
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private void notifyObserversOfNetworkConnect(
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NetworkChangeDetector.NetworkInformation networkInfo) {
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List<Long> nativeObservers = getNativeNetworkObserversSync();
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for (Long nativeObserver : nativeObservers) {
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nativeNotifyOfNetworkConnect(nativeObserver, networkInfo);
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}
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}
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private void notifyObserversOfNetworkDisconnect(long networkHandle) {
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List<Long> nativeObservers = getNativeNetworkObserversSync();
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for (Long nativeObserver : nativeObservers) {
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nativeNotifyOfNetworkDisconnect(nativeObserver, networkHandle);
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}
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}
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private void notifyObserversOfNetworkPreference(
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List<NetworkChangeDetector.ConnectionType> types, int preference) {
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List<Long> nativeObservers = getNativeNetworkObserversSync();
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for (NetworkChangeDetector.ConnectionType type : types) {
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for (Long nativeObserver : nativeObservers) {
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nativeNotifyOfNetworkPreference(nativeObserver, type, preference);
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}
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}
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}
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private void updateObserverActiveNetworkList(long nativeObserver) {
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List<NetworkChangeDetector.NetworkInformation> networkInfoList;
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synchronized (networkChangeDetectorLock) {
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networkInfoList =
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(networkChangeDetector == null) ? null : networkChangeDetector.getActiveNetworkList();
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}
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if (networkInfoList == null || networkInfoList.size() == 0) {
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return;
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}
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NetworkChangeDetector.NetworkInformation[] networkInfos =
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new NetworkChangeDetector.NetworkInformation[networkInfoList.size()];
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networkInfos = networkInfoList.toArray(networkInfos);
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nativeNotifyOfActiveNetworkList(nativeObserver, networkInfos);
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}
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private List<Long> getNativeNetworkObserversSync() {
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synchronized (nativeNetworkObservers) {
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return new ArrayList<>(nativeNetworkObservers);
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}
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}
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/**
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* Adds an observer for any connection type changes.
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*
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* @deprecated Use getInstance(appContext).addObserver instead.
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*/
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@Deprecated
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public static void addNetworkObserver(NetworkObserver observer) {
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getInstance().addObserver(observer);
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}
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public void addObserver(NetworkObserver observer) {
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synchronized (networkObservers) {
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networkObservers.add(observer);
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}
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}
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/**
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* Removes an observer for any connection type changes.
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*
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* @deprecated Use getInstance(appContext).removeObserver instead.
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*/
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@Deprecated
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public static void removeNetworkObserver(NetworkObserver observer) {
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getInstance().removeObserver(observer);
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}
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public void removeObserver(NetworkObserver observer) {
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synchronized (networkObservers) {
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networkObservers.remove(observer);
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}
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}
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/** Checks if there currently is connectivity. */
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public static boolean isOnline() {
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NetworkChangeDetector.ConnectionType connectionType = getInstance().getCurrentConnectionType();
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return connectionType != NetworkChangeDetector.ConnectionType.CONNECTION_NONE;
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}
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private native void nativeNotifyConnectionTypeChanged(long nativeAndroidNetworkMonitor);
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private native void nativeNotifyOfNetworkConnect(
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long nativeAndroidNetworkMonitor, NetworkChangeDetector.NetworkInformation networkInfo);
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private native void nativeNotifyOfNetworkDisconnect(
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long nativeAndroidNetworkMonitor, long networkHandle);
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private native void nativeNotifyOfActiveNetworkList(
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long nativeAndroidNetworkMonitor, NetworkChangeDetector.NetworkInformation[] networkInfos);
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private native void nativeNotifyOfNetworkPreference(
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long nativeAndroidNetworkMonitor, NetworkChangeDetector.ConnectionType type, int preference);
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// For testing only.
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@Nullable
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NetworkChangeDetector getNetworkChangeDetector() {
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synchronized (networkChangeDetectorLock) {
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return networkChangeDetector;
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}
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}
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// For testing only.
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int getNumObservers() {
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synchronized (networkChangeDetectorLock) {
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return numObservers;
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}
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}
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// For testing only.
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static NetworkMonitorAutoDetect createAndSetAutoDetectForTest(Context context) {
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NetworkMonitor networkMonitor = getInstance();
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NetworkChangeDetector networkChangeDetector =
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networkMonitor.createNetworkChangeDetector(context);
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networkMonitor.networkChangeDetector = networkChangeDetector;
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return (NetworkMonitorAutoDetect) networkChangeDetector;
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}
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}
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