| /* |
| * Copyright (C) 2017 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.wallpaper.module; |
| |
| 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 java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Implementation of {@link NetworkStatusNotifier} which uses |
| * {@link android.net.ConnectivityManager} to provide network status. |
| */ |
| public class DefaultNetworkStatusNotifier implements NetworkStatusNotifier { |
| |
| private Context mAppContext; |
| private ConnectivityManager mConnectivityManager; |
| private BroadcastReceiver mReceiver; |
| private List<Listener> mListeners; |
| |
| public DefaultNetworkStatusNotifier(Context context) { |
| mAppContext = context.getApplicationContext(); |
| |
| mConnectivityManager = |
| (ConnectivityManager) mAppContext.getSystemService(Context.CONNECTIVITY_SERVICE); |
| mListeners = new ArrayList<>(); |
| } |
| |
| @Override |
| @NetworkStatus |
| public int getNetworkStatus() { |
| NetworkInfo activeNetwork = mConnectivityManager.getActiveNetworkInfo(); |
| |
| if (activeNetwork != null && activeNetwork.isConnected()) { |
| return NETWORK_CONNECTED; |
| } |
| return NETWORK_NOT_CONNECTED; |
| } |
| |
| @Override |
| public void registerListener(Listener listener) { |
| if (mReceiver == null) { |
| mReceiver = new BroadcastReceiver() { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| @NetworkStatus int networkStatus = getNetworkStatus(); |
| for (int i = 0; i < mListeners.size(); i++) { |
| mListeners.get(i).onNetworkChanged(networkStatus); |
| } |
| } |
| }; |
| IntentFilter intentFilter = new IntentFilter(); |
| intentFilter.addAction(android.net.ConnectivityManager.CONNECTIVITY_ACTION); |
| |
| if (!mListeners.contains(listener)) { |
| mListeners.add(listener); |
| } |
| // Upon an initial register, the broadcast is immediately sent. |
| mAppContext.registerReceiver(mReceiver, intentFilter); |
| return; |
| } |
| |
| if (!mListeners.contains(listener)) { |
| mListeners.add(listener); |
| } |
| } |
| |
| @Override |
| public void unregisterListener(Listener listener) { |
| mListeners.remove(listener); |
| |
| if (!mListeners.isEmpty() || mReceiver == null) { |
| return; |
| } |
| |
| mAppContext.unregisterReceiver(mReceiver); |
| mReceiver = null; |
| } |
| } |