| 1 | // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | package org.chromium.net; |
| 6 | |
| 7 | import android.content.BroadcastReceiver; |
| 8 | import android.content.Context; |
| 9 | import android.content.Intent; |
| 10 | import android.content.IntentFilter; |
| 11 | import android.net.ConnectivityManager; |
| 12 | import android.net.NetworkInfo; |
| 13 | import android.telephony.TelephonyManager; |
| 14 | import android.util.Log; |
| 15 | |
| 16 | import org.chromium.base.ActivityStatus; |
| 17 | |
| 18 | /** |
| 19 | * Used by the NetworkChangeNotifier to listens to platform changes in connectivity. |
| 20 | * Note that use of this class requires that the app have the platform |
| 21 | * ACCESS_NETWORK_STATE permission. |
| 22 | */ |
| 23 | public class NetworkChangeNotifierAutoDetect extends BroadcastReceiver |
| 24 | implements ActivityStatus.StateListener { |
| 25 | |
| 26 | /** Queries the ConnectivityManager for information about the current connection. */ |
| 27 | static class ConnectivityManagerDelegate { |
| 28 | private final ConnectivityManager mConnectivityManager; |
| 29 | |
| 30 | ConnectivityManagerDelegate(Context context) { |
| 31 | mConnectivityManager = |
| 32 | (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); |
| 33 | } |
| 34 | |
| 35 | // For testing. |
| 36 | ConnectivityManagerDelegate() { |
| 37 | // All the methods below should be overridden. |
| 38 | mConnectivityManager = null; |
| 39 | } |
| 40 | |
| 41 | boolean activeNetworkExists() { |
| 42 | return mConnectivityManager.getActiveNetworkInfo() != null; |
| 43 | } |
| 44 | |
| 45 | boolean isConnected() { |
| 46 | return mConnectivityManager.getActiveNetworkInfo().isConnected(); |
| 47 | } |
| 48 | |
| 49 | int getNetworkType() { |
| 50 | return mConnectivityManager.getActiveNetworkInfo().getType(); |
| 51 | } |
| 52 | |
| 53 | int getNetworkSubtype() { |
| 54 | return mConnectivityManager.getActiveNetworkInfo().getSubtype(); |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | private static final String TAG = "NetworkChangeNotifierAutoDetect"; |
| 59 | |
| 60 | private final NetworkConnectivityIntentFilter mIntentFilter = |
| 61 | new NetworkConnectivityIntentFilter(); |
| 62 | |
| 63 | private final Observer mObserver; |
| 64 | |
| 65 | private final Context mContext; |
| 66 | private ConnectivityManagerDelegate mConnectivityManagerDelegate; |
| 67 | private boolean mRegistered; |
| 68 | private int mConnectionType; |
| 69 | |
| 70 | /** |
| 71 | * Observer notified on the UI thread whenever a new connection type was detected. |
| 72 | */ |
| 73 | public static interface Observer { |
| 74 | public void onConnectionTypeChanged(int newConnectionType); |
| 75 | } |
| 76 | |
| 77 | public NetworkChangeNotifierAutoDetect(Observer observer, Context context) { |
| 78 | mObserver = observer; |
| 79 | mContext = context.getApplicationContext(); |
| 80 | mConnectivityManagerDelegate = new ConnectivityManagerDelegate(context); |
| 81 | mConnectionType = getCurrentConnectionType(); |
| 82 | ActivityStatus.registerStateListener(this); |
| 83 | } |
| 84 | |
| 85 | /** |
| 86 | * Allows overriding the ConnectivityManagerDelegate for tests. |
| 87 | */ |
| 88 | void setConnectivityManagerDelegateForTests(ConnectivityManagerDelegate delegate) { |
| 89 | mConnectivityManagerDelegate = delegate; |
| 90 | } |
| 91 | |
| 92 | public void destroy() { |
| 93 | unregisterReceiver(); |
| 94 | } |
| 95 | |
| 96 | /** |
| 97 | * Register a BroadcastReceiver in the given context. |
| 98 | */ |
| 99 | private void registerReceiver() { |
| 100 | if (!mRegistered) { |
| 101 | mRegistered = true; |
| 102 | mContext.registerReceiver(this, mIntentFilter); |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | /** |
| 107 | * Unregister the BroadcastReceiver in the given context. |
| 108 | */ |
| 109 | private void unregisterReceiver() { |
| 110 | if (mRegistered) { |
| 111 | mRegistered = false; |
| 112 | mContext.unregisterReceiver(this); |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | public int getCurrentConnectionType() { |
| 117 | // Track exactly what type of connection we have. |
| 118 | if (!mConnectivityManagerDelegate.activeNetworkExists() || |
| 119 | !mConnectivityManagerDelegate.isConnected()) { |
| 120 | return NetworkChangeNotifier.CONNECTION_NONE; |
| 121 | } |
| 122 | |
| 123 | switch (mConnectivityManagerDelegate.getNetworkType()) { |
| 124 | case ConnectivityManager.TYPE_ETHERNET: |
| 125 | return NetworkChangeNotifier.CONNECTION_ETHERNET; |
| 126 | case ConnectivityManager.TYPE_WIFI: |
| 127 | return NetworkChangeNotifier.CONNECTION_WIFI; |
| 128 | case ConnectivityManager.TYPE_WIMAX: |
| 129 | return NetworkChangeNotifier.CONNECTION_4G; |
| 130 | case ConnectivityManager.TYPE_MOBILE: |
| 131 | // Use information from TelephonyManager to classify the connection. |
| 132 | switch (mConnectivityManagerDelegate.getNetworkSubtype()) { |
| 133 | case TelephonyManager.NETWORK_TYPE_GPRS: |
| 134 | case TelephonyManager.NETWORK_TYPE_EDGE: |
| 135 | case TelephonyManager.NETWORK_TYPE_CDMA: |
| 136 | case TelephonyManager.NETWORK_TYPE_1xRTT: |
| 137 | case TelephonyManager.NETWORK_TYPE_IDEN: |
| 138 | return NetworkChangeNotifier.CONNECTION_2G; |
| 139 | case TelephonyManager.NETWORK_TYPE_UMTS: |
| 140 | case TelephonyManager.NETWORK_TYPE_EVDO_0: |
| 141 | case TelephonyManager.NETWORK_TYPE_EVDO_A: |
| 142 | case TelephonyManager.NETWORK_TYPE_HSDPA: |
| 143 | case TelephonyManager.NETWORK_TYPE_HSUPA: |
| 144 | case TelephonyManager.NETWORK_TYPE_HSPA: |
| 145 | case TelephonyManager.NETWORK_TYPE_EVDO_B: |
| 146 | case TelephonyManager.NETWORK_TYPE_EHRPD: |
| 147 | case TelephonyManager.NETWORK_TYPE_HSPAP: |
| 148 | return NetworkChangeNotifier.CONNECTION_3G; |
| 149 | case TelephonyManager.NETWORK_TYPE_LTE: |
| 150 | return NetworkChangeNotifier.CONNECTION_4G; |
| 151 | default: |
| 152 | return NetworkChangeNotifier.CONNECTION_UNKNOWN; |
| 153 | } |
| 154 | default: |
| 155 | return NetworkChangeNotifier.CONNECTION_UNKNOWN; |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | // BroadcastReceiver |
| 160 | @Override |
| 161 | public void onReceive(Context context, Intent intent) { |
| 162 | connectionTypeChanged(); |
| 163 | } |
| 164 | |
| 165 | // ActivityStatus.StateListener |
| 166 | @Override |
| 167 | public void onActivityStateChange(int state) { |
| 168 | if (state == ActivityStatus.RESUMED) { |
| 169 | // Note that this also covers the case where the main activity is created. The CREATED |
| 170 | // event is always followed by the RESUMED event. This is a temporary "hack" until |
| 171 | // http://crbug.com/176837 is fixed. The CREATED event can't be used reliably for now |
| 172 | // since its notification is deferred. This means that it can immediately follow a |
| 173 | // DESTROYED/STOPPED/... event which is problematic. |
| 174 | // TODO(pliard): fix http://crbug.com/176837. |
| 175 | connectionTypeChanged(); |
| 176 | registerReceiver(); |
| 177 | } else if (state == ActivityStatus.PAUSED) { |
| 178 | unregisterReceiver(); |
| 179 | } |
| 180 | } |
| 181 | |
| 182 | private void connectionTypeChanged() { |
| 183 | int newConnectionType = getCurrentConnectionType(); |
| 184 | if (newConnectionType == mConnectionType) return; |
| 185 | |
| 186 | mConnectionType = newConnectionType; |
| 187 | Log.d(TAG, "Network connectivity changed, type is: " + mConnectionType); |
| 188 | mObserver.onConnectionTypeChanged(newConnectionType); |
| 189 | } |
| 190 | |
| 191 | private static class NetworkConnectivityIntentFilter extends IntentFilter { |
| 192 | NetworkConnectivityIntentFilter() { |
| 193 | addAction(ConnectivityManager.CONNECTIVITY_ACTION); |
| 194 | } |
| 195 | } |
| 196 | } |