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      1 /*
      2  * Copyright (C) 2016 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 package com.android.settings.network;
     17 
     18 import android.content.Context;
     19 import android.os.UserManager;
     20 import android.support.annotation.VisibleForTesting;
     21 import android.support.v7.preference.Preference;
     22 import android.support.v7.preference.PreferenceScreen;
     23 import android.telephony.PhoneStateListener;
     24 import android.telephony.ServiceState;
     25 import android.telephony.TelephonyManager;
     26 
     27 import com.android.settings.Utils;
     28 import com.android.settings.core.PreferenceController;
     29 import com.android.settings.core.lifecycle.LifecycleObserver;
     30 import com.android.settings.core.lifecycle.events.OnPause;
     31 import com.android.settings.core.lifecycle.events.OnResume;
     32 
     33 import static android.os.UserHandle.myUserId;
     34 import static android.os.UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS;
     35 import static com.android.settingslib.RestrictedLockUtils.hasBaseUserRestriction;
     36 
     37 public class MobileNetworkPreferenceController extends PreferenceController implements
     38         LifecycleObserver, OnResume, OnPause {
     39 
     40     private static final String KEY_MOBILE_NETWORK_SETTINGS = "mobile_network_settings";
     41 
     42     private final UserManager mUserManager;
     43     private final boolean mIsSecondaryUser;
     44     private final TelephonyManager mTelephonyManager;
     45     private Preference mPreference;
     46     @VisibleForTesting(otherwise = VisibleForTesting.PRIVATE)
     47     PhoneStateListener mPhoneStateListener;
     48 
     49     public MobileNetworkPreferenceController(Context context) {
     50         super(context);
     51         mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE);
     52         mTelephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
     53         mIsSecondaryUser = !mUserManager.isAdminUser();
     54     }
     55 
     56     @Override
     57     public boolean isAvailable() {
     58         return !mIsSecondaryUser
     59                 && !Utils.isWifiOnly(mContext)
     60                 && !hasBaseUserRestriction(mContext, DISALLOW_CONFIG_MOBILE_NETWORKS, myUserId());
     61     }
     62 
     63     @Override
     64     public void displayPreference(PreferenceScreen screen) {
     65         super.displayPreference(screen);
     66         if (isAvailable()) {
     67             mPreference = screen.findPreference(getPreferenceKey());
     68         }
     69     }
     70 
     71     @Override
     72     public String getPreferenceKey() {
     73         return KEY_MOBILE_NETWORK_SETTINGS;
     74     }
     75 
     76     @Override
     77     public void onResume() {
     78         if (isAvailable()) {
     79             if (mPhoneStateListener == null) {
     80                 mPhoneStateListener = new PhoneStateListener() {
     81                     @Override
     82                     public void onServiceStateChanged(ServiceState serviceState) {
     83                         if (mPreference != null) {
     84                             mPreference.setSummary(mTelephonyManager.getNetworkOperatorName());
     85                         }
     86                     }
     87                 };
     88             }
     89             mTelephonyManager.listen(mPhoneStateListener, PhoneStateListener.LISTEN_SERVICE_STATE);
     90         }
     91     }
     92 
     93     @Override
     94     public void onPause() {
     95         if (mPhoneStateListener != null) {
     96             mTelephonyManager.listen(mPhoneStateListener, PhoneStateListener.LISTEN_NONE);
     97         }
     98     }
     99 }
    100