| /* |
| * Copyright 2014, The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.managedprovisioning; |
| |
| 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.net.NetworkInfo.DetailedState; |
| |
| /** |
| * Monitor the state of the data network and the checkin service. Invoke a callback when the network |
| * is connected and checkin has succeeded. Callbacks are made on the thread that created this |
| * object. |
| */ |
| public class NetworkMonitor { |
| /** State notification callback. Expect some duplicate notifications. */ |
| public interface Callback { |
| |
| void onNetworkConnected(); |
| |
| void onNetworkDisconnected(); |
| } |
| |
| private Context mContext = null; |
| private Callback mCallback = null; |
| |
| private boolean mNetworkConnected = false; |
| |
| private boolean mReceiverRegistered; |
| |
| /** |
| * Start watching the network and monitoring the checkin service. Immediately invokes one of the |
| * callback methods to report the current state, and then invokes callback methods over time as |
| * the state changes. |
| * |
| * @param context to use for intent observers and such |
| * @param callback to invoke when the network status changes |
| */ |
| public NetworkMonitor(Context context, Callback callback) { |
| mContext = context; |
| mCallback = callback; |
| |
| IntentFilter filter = new IntentFilter(); |
| filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION); |
| |
| // Listen to immediate connectivity changes which are 3 seconds |
| // earlier than CONNECTIVITY_ACTION and may not have IPv6 routes |
| // setup. However, this may allow us to start up services like |
| // the CheckinService a bit earlier. |
| filter.addAction(ConnectivityManager.INET_CONDITION_ACTION); |
| |
| context.registerReceiver(mBroadcastReceiver, filter); |
| mReceiverRegistered = true; |
| |
| } |
| |
| /** |
| * Stop watching the network and checkin service. |
| */ |
| public synchronized void close() { |
| if (mCallback == null) { |
| return; |
| } |
| mCallback = null; |
| |
| if (mReceiverRegistered) { |
| mContext.unregisterReceiver(mBroadcastReceiver); |
| mReceiverRegistered = false; |
| } |
| } |
| |
| public final BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| ProvisionLogger.logd("onReceive " + intent.toString()); |
| |
| mNetworkConnected = isConnectedToWifi(context); |
| |
| if (intent.getAction().equals(ConnectivityManager.CONNECTIVITY_ACTION) || |
| intent.getAction().equals(ConnectivityManager.INET_CONDITION_ACTION)) { |
| if (mNetworkConnected) { |
| mCallback.onNetworkConnected(); |
| } else { |
| mCallback.onNetworkDisconnected(); |
| } |
| } |
| } |
| }; |
| |
| public static boolean isConnectedToWifi(Context context) { |
| ConnectivityManager cm = (ConnectivityManager) context.getSystemService( |
| Context.CONNECTIVITY_SERVICE); |
| if (cm != null) { |
| NetworkInfo ni = cm.getActiveNetworkInfo(); |
| if (ni != null) { |
| DetailedState detailedState = ni.getDetailedState(); |
| return detailedState.equals(DetailedState.CONNECTED); |
| } else { |
| return false; |
| } |
| } else { |
| return false; |
| } |
| } |
| |
| public boolean isNetworkConnected() { |
| return mNetworkConnected; |
| } |
| } |