1 /* 2 * Copyright (C) 2019 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.settings.network; 18 19 import android.content.Context; 20 import android.database.ContentObserver; 21 import android.net.Uri; 22 import android.os.Handler; 23 import android.provider.Settings; 24 import android.telephony.TelephonyManager; 25 26 /** 27 * {@link ContentObserver} to listen to update of mobile data change 28 */ 29 public class MobileDataContentObserver extends ContentObserver { 30 private OnMobileDataChangedListener mListener; 31 MobileDataContentObserver(Handler handler)32 public MobileDataContentObserver(Handler handler) { 33 super(handler); 34 } 35 getObservableUri(int subId)36 public static Uri getObservableUri(int subId) { 37 Uri uri = Settings.Global.getUriFor(Settings.Global.MOBILE_DATA); 38 if (TelephonyManager.getDefault().getSimCount() != 1) { 39 uri = Settings.Global.getUriFor(Settings.Global.MOBILE_DATA + subId); 40 } 41 return uri; 42 } 43 setOnMobileDataChangedListener(OnMobileDataChangedListener lsn)44 public void setOnMobileDataChangedListener(OnMobileDataChangedListener lsn) { 45 mListener = lsn; 46 } 47 48 @Override onChange(boolean selfChange)49 public void onChange(boolean selfChange) { 50 super.onChange(selfChange); 51 if (mListener != null) { 52 mListener.onMobileDataChanged(); 53 } 54 } 55 register(Context context, int subId)56 public void register(Context context, int subId) { 57 final Uri uri = getObservableUri(subId); 58 context.getContentResolver().registerContentObserver(uri, false, this); 59 60 } 61 unRegister(Context context)62 public void unRegister(Context context) { 63 context.getContentResolver().unregisterContentObserver(this); 64 } 65 66 /** 67 * Listener for update of mobile data(ON vs OFF) 68 */ 69 public interface OnMobileDataChangedListener { onMobileDataChanged()70 void onMobileDataChanged(); 71 } 72 } 73