Jason Monk | c6d71b8 | 2014-01-17 14:52:00 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2014, The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.android.managedprovisioning; |
| 18 | |
| 19 | import android.content.BroadcastReceiver; |
| 20 | import android.content.Context; |
| 21 | import android.content.Intent; |
| 22 | import android.content.IntentFilter; |
| 23 | import android.net.ConnectivityManager; |
| 24 | import android.net.NetworkInfo; |
| 25 | import android.net.NetworkInfo.DetailedState; |
| 26 | |
| 27 | /** |
| 28 | * Monitor the state of the data network and the checkin service. Invoke a callback when the network |
| 29 | * is connected and checkin has succeeded. Callbacks are made on the thread that created this |
| 30 | * object. |
| 31 | */ |
| 32 | public class NetworkMonitor { |
| 33 | /** State notification callback. Expect some duplicate notifications. */ |
| 34 | public interface Callback { |
| 35 | |
| 36 | void onNetworkConnected(); |
| 37 | |
| 38 | void onNetworkDisconnected(); |
Jason Monk | c6d71b8 | 2014-01-17 14:52:00 -0500 | [diff] [blame] | 39 | } |
| 40 | |
| 41 | private Context mContext = null; |
| 42 | private Callback mCallback = null; |
| 43 | |
| 44 | private boolean mNetworkConnected = false; |
Jason Monk | c6d71b8 | 2014-01-17 14:52:00 -0500 | [diff] [blame] | 45 | |
| 46 | private boolean mReceiverRegistered; |
| 47 | |
| 48 | /** |
| 49 | * Start watching the network and monitoring the checkin service. Immediately invokes one of the |
| 50 | * callback methods to report the current state, and then invokes callback methods over time as |
| 51 | * the state changes. |
| 52 | * |
| 53 | * @param context to use for intent observers and such |
| 54 | * @param callback to invoke when the network status changes |
| 55 | */ |
| 56 | public NetworkMonitor(Context context, Callback callback) { |
| 57 | mContext = context; |
| 58 | mCallback = callback; |
| 59 | |
| 60 | IntentFilter filter = new IntentFilter(); |
| 61 | filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION); |
| 62 | |
| 63 | // Listen to immediate connectivity changes which are 3 seconds |
| 64 | // earlier than CONNECTIVITY_ACTION and may not have IPv6 routes |
| 65 | // setup. However, this may allow us to start up services like |
| 66 | // the CheckinService a bit earlier. |
| 67 | filter.addAction(ConnectivityManager.INET_CONDITION_ACTION); |
| 68 | |
| 69 | context.registerReceiver(mBroadcastReceiver, filter); |
| 70 | mReceiverRegistered = true; |
| 71 | |
Jason Monk | c6d71b8 | 2014-01-17 14:52:00 -0500 | [diff] [blame] | 72 | } |
| 73 | |
| 74 | /** |
| 75 | * Stop watching the network and checkin service. |
| 76 | */ |
| 77 | public synchronized void close() { |
| 78 | if (mCallback == null) { |
| 79 | return; |
| 80 | } |
| 81 | mCallback = null; |
| 82 | |
| 83 | if (mReceiverRegistered) { |
| 84 | mContext.unregisterReceiver(mBroadcastReceiver); |
| 85 | mReceiverRegistered = false; |
| 86 | } |
| 87 | } |
| 88 | |
Jason Monk | c6d71b8 | 2014-01-17 14:52:00 -0500 | [diff] [blame] | 89 | public final BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() { |
| 90 | @Override |
| 91 | public void onReceive(Context context, Intent intent) { |
| 92 | ProvisionLogger.logd("onReceive " + intent.toString()); |
| 93 | |
| 94 | mNetworkConnected = isConnectedToWifi(context); |
| 95 | |
| 96 | if (intent.getAction().equals(ConnectivityManager.CONNECTIVITY_ACTION) || |
| 97 | intent.getAction().equals(ConnectivityManager.INET_CONDITION_ACTION)) { |
| 98 | if (mNetworkConnected) { |
| 99 | mCallback.onNetworkConnected(); |
| 100 | } else { |
| 101 | mCallback.onNetworkDisconnected(); |
| 102 | } |
| 103 | } |
Jason Monk | c6d71b8 | 2014-01-17 14:52:00 -0500 | [diff] [blame] | 104 | } |
| 105 | }; |
| 106 | |
| 107 | public static boolean isConnectedToWifi(Context context) { |
| 108 | ConnectivityManager cm = (ConnectivityManager) context.getSystemService( |
| 109 | Context.CONNECTIVITY_SERVICE); |
| 110 | if (cm != null) { |
| 111 | NetworkInfo ni = cm.getActiveNetworkInfo(); |
| 112 | if (ni != null) { |
| 113 | DetailedState detailedState = ni.getDetailedState(); |
| 114 | return detailedState.equals(DetailedState.CONNECTED); |
| 115 | } else { |
| 116 | return false; |
| 117 | } |
| 118 | } else { |
| 119 | return false; |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | public boolean isNetworkConnected() { |
| 124 | return mNetworkConnected; |
| 125 | } |
Jason Monk | c6d71b8 | 2014-01-17 14:52:00 -0500 | [diff] [blame] | 126 | } |