| /* |
| * Copyright (C) 2019 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.settings.network; |
| |
| import android.content.Context; |
| import android.database.ContentObserver; |
| import android.net.Uri; |
| import android.os.Handler; |
| import android.provider.Settings; |
| import android.telephony.SubscriptionManager; |
| |
| /** Helper class to listen for changes in the enabled state of mobile data. */ |
| public class MobileDataEnabledListener extends ContentObserver { |
| private Context mContext; |
| private Client mClient; |
| private int mSubId; |
| |
| public interface Client { |
| void onMobileDataEnabledChange(); |
| } |
| |
| public MobileDataEnabledListener(Context context, Client client) { |
| super(new Handler()); |
| mContext = context; |
| mClient = client; |
| mSubId = SubscriptionManager.INVALID_SUBSCRIPTION_ID; |
| } |
| |
| /** Starts listening to changes in the enabled state for data on the given subscription id. */ |
| public void start(int subId) { |
| mSubId = subId; |
| Uri uri; |
| if (mSubId == SubscriptionManager.INVALID_SUBSCRIPTION_ID) { |
| uri = Settings.Global.getUriFor(Settings.Global.MOBILE_DATA); |
| } else { |
| uri = Settings.Global.getUriFor(Settings.Global.MOBILE_DATA + mSubId); |
| } |
| mContext.getContentResolver().registerContentObserver(uri, true /*notifyForDescendants*/, |
| this); |
| } |
| |
| public int getSubId() { |
| return mSubId; |
| } |
| |
| public MobileDataEnabledListener stop() { |
| mContext.getContentResolver().unregisterContentObserver(this); |
| return this; |
| } |
| |
| @Override |
| public void onChange(boolean selfChange) { |
| mClient.onMobileDataEnabledChange(); |
| } |
| } |