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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package org.chromium.net;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.telephony.TelephonyManager;
import android.util.Log;
import org.chromium.base.ActivityStatus;
/**
* Used by the NetworkChangeNotifier to listens to platform changes in connectivity.
* Note that use of this class requires that the app have the platform
* ACCESS_NETWORK_STATE permission.
*/
public class NetworkChangeNotifierAutoDetect extends BroadcastReceiver
implements ActivityStatus.StateListener {
/** Queries the ConnectivityManager for information about the current connection. */
static class ConnectivityManagerDelegate {
private final ConnectivityManager mConnectivityManager;
ConnectivityManagerDelegate(Context context) {
mConnectivityManager =
(ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
}
// For testing.
ConnectivityManagerDelegate() {
// All the methods below should be overridden.
mConnectivityManager = null;
}
boolean activeNetworkExists() {
return mConnectivityManager.getActiveNetworkInfo() != null;
}
boolean isConnected() {
return mConnectivityManager.getActiveNetworkInfo().isConnected();
}
int getNetworkType() {
return mConnectivityManager.getActiveNetworkInfo().getType();
}
int getNetworkSubtype() {
return mConnectivityManager.getActiveNetworkInfo().getSubtype();
}
}
private static final String TAG = "NetworkChangeNotifierAutoDetect";
private final NetworkConnectivityIntentFilter mIntentFilter =
new NetworkConnectivityIntentFilter();
private final Observer mObserver;
private final Context mContext;
private ConnectivityManagerDelegate mConnectivityManagerDelegate;
private boolean mRegistered;
private int mConnectionType;
/**
* Observer notified on the UI thread whenever a new connection type was detected.
*/
public static interface Observer {
public void onConnectionTypeChanged(int newConnectionType);
}
public NetworkChangeNotifierAutoDetect(Observer observer, Context context) {
mObserver = observer;
mContext = context.getApplicationContext();
mConnectivityManagerDelegate = new ConnectivityManagerDelegate(context);
mConnectionType = getCurrentConnectionType();
ActivityStatus.registerStateListener(this);
}
/**
* Allows overriding the ConnectivityManagerDelegate for tests.
*/
void setConnectivityManagerDelegateForTests(ConnectivityManagerDelegate delegate) {
mConnectivityManagerDelegate = delegate;
}
public void destroy() {
unregisterReceiver();
}
/**
* Register a BroadcastReceiver in the given context.
*/
private void registerReceiver() {
if (!mRegistered) {
mRegistered = true;
mContext.registerReceiver(this, mIntentFilter);
}
}
/**
* Unregister the BroadcastReceiver in the given context.
*/
private void unregisterReceiver() {
if (mRegistered) {
mRegistered = false;
mContext.unregisterReceiver(this);
}
}
public int getCurrentConnectionType() {
// Track exactly what type of connection we have.
if (!mConnectivityManagerDelegate.activeNetworkExists() ||
!mConnectivityManagerDelegate.isConnected()) {
return NetworkChangeNotifier.CONNECTION_NONE;
}
switch (mConnectivityManagerDelegate.getNetworkType()) {
case ConnectivityManager.TYPE_ETHERNET:
return NetworkChangeNotifier.CONNECTION_ETHERNET;
case ConnectivityManager.TYPE_WIFI:
return NetworkChangeNotifier.CONNECTION_WIFI;
case ConnectivityManager.TYPE_WIMAX:
return NetworkChangeNotifier.CONNECTION_4G;
case ConnectivityManager.TYPE_MOBILE:
// Use information from TelephonyManager to classify the connection.
switch (mConnectivityManagerDelegate.getNetworkSubtype()) {
case TelephonyManager.NETWORK_TYPE_GPRS:
case TelephonyManager.NETWORK_TYPE_EDGE:
case TelephonyManager.NETWORK_TYPE_CDMA:
case TelephonyManager.NETWORK_TYPE_1xRTT:
case TelephonyManager.NETWORK_TYPE_IDEN:
return NetworkChangeNotifier.CONNECTION_2G;
case TelephonyManager.NETWORK_TYPE_UMTS:
case TelephonyManager.NETWORK_TYPE_EVDO_0:
case TelephonyManager.NETWORK_TYPE_EVDO_A:
case TelephonyManager.NETWORK_TYPE_HSDPA:
case TelephonyManager.NETWORK_TYPE_HSUPA:
case TelephonyManager.NETWORK_TYPE_HSPA:
case TelephonyManager.NETWORK_TYPE_EVDO_B:
case TelephonyManager.NETWORK_TYPE_EHRPD:
case TelephonyManager.NETWORK_TYPE_HSPAP:
return NetworkChangeNotifier.CONNECTION_3G;
case TelephonyManager.NETWORK_TYPE_LTE:
return NetworkChangeNotifier.CONNECTION_4G;
default:
return NetworkChangeNotifier.CONNECTION_UNKNOWN;
}
default:
return NetworkChangeNotifier.CONNECTION_UNKNOWN;
}
}
// BroadcastReceiver
@Override
public void onReceive(Context context, Intent intent) {
connectionTypeChanged();
}
// ActivityStatus.StateListener
@Override
public void onActivityStateChange(int state) {
if (state == ActivityStatus.RESUMED) {
// Note that this also covers the case where the main activity is created. The CREATED
// event is always followed by the RESUMED event. This is a temporary "hack" until
// http://crbug.com/176837 is fixed. The CREATED event can't be used reliably for now
// since its notification is deferred. This means that it can immediately follow a
// DESTROYED/STOPPED/... event which is problematic.
// TODO(pliard): fix http://crbug.com/176837.
connectionTypeChanged();
registerReceiver();
} else if (state == ActivityStatus.PAUSED) {
unregisterReceiver();
}
}
private void connectionTypeChanged() {
int newConnectionType = getCurrentConnectionType();
if (newConnectionType == mConnectionType) return;
mConnectionType = newConnectionType;
Log.d(TAG, "Network connectivity changed, type is: " + mConnectionType);
mObserver.onConnectionTypeChanged(newConnectionType);
}
private static class NetworkConnectivityIntentFilter extends IntentFilter {
NetworkConnectivityIntentFilter() {
addAction(ConnectivityManager.CONNECTIVITY_ACTION);
}
}
}
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