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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"); you may not use this file
      5  * except in compliance with the License. You may obtain a copy of the License at
      6  *
      7  *      http://www.apache.org/licenses/LICENSE-2.0
      8  *
      9  * Unless required by applicable law or agreed to in writing, software distributed under the
     10  * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     11  * KIND, either express or implied. See the License for the specific language governing
     12  * permissions and limitations under the License.
     13  */
     14 
     15 package com.android.settings.datausage;
     16 
     17 import com.android.settings.SettingsPreferenceFragment;
     18 import com.android.settingslib.NetworkPolicyEditor;
     19 
     20 import android.content.Context;
     21 import android.net.INetworkStatsService;
     22 import android.net.NetworkPolicy;
     23 import android.net.NetworkPolicyManager;
     24 import android.os.Bundle;
     25 import android.os.INetworkManagementService;
     26 import android.os.RemoteException;
     27 import android.os.ServiceManager;
     28 import android.os.UserManager;
     29 import android.telephony.SubscriptionManager;
     30 import android.telephony.TelephonyManager;
     31 import android.util.Log;
     32 
     33 public abstract class DataUsageBase extends SettingsPreferenceFragment {
     34 
     35     private static final String TAG = "DataUsageBase";
     36 
     37     protected final TemplatePreference.NetworkServices services =
     38             new TemplatePreference.NetworkServices();
     39 
     40     @Override
     41     public void onCreate(Bundle icicle) {
     42         super.onCreate(icicle);
     43         final Context context = getActivity();
     44 
     45         services.mNetworkService = INetworkManagementService.Stub.asInterface(
     46                 ServiceManager.getService(Context.NETWORKMANAGEMENT_SERVICE));
     47         services.mStatsService = INetworkStatsService.Stub.asInterface(
     48                 ServiceManager.getService(Context.NETWORK_STATS_SERVICE));
     49         services.mPolicyManager = NetworkPolicyManager.from(context);
     50 
     51         services.mPolicyEditor = new NetworkPolicyEditor(services.mPolicyManager);
     52 
     53         services.mTelephonyManager = TelephonyManager.from(context);
     54         services.mSubscriptionManager = SubscriptionManager.from(context);
     55         services.mUserManager = UserManager.get(context);
     56     }
     57 
     58     @Override
     59     public void onResume() {
     60         super.onResume();
     61         services.mPolicyEditor.read();
     62     }
     63 
     64     protected boolean isAdmin() {
     65         return services.mUserManager.isAdminUser();
     66     }
     67 
     68     protected boolean isMobileDataAvailable(int subId) {
     69         return services.mSubscriptionManager.getActiveSubscriptionInfo(subId) != null;
     70     }
     71 
     72     protected boolean isNetworkPolicyModifiable(NetworkPolicy policy, int subId) {
     73         return policy != null && isBandwidthControlEnabled() && services.mUserManager.isAdminUser()
     74                 && isDataEnabled(subId);
     75     }
     76 
     77     private boolean isDataEnabled(int subId) {
     78         if (subId == SubscriptionManager.INVALID_SUBSCRIPTION_ID) {
     79             return true;
     80         }
     81         return services.mTelephonyManager.getDataEnabled(subId);
     82     }
     83 
     84     protected boolean isBandwidthControlEnabled() {
     85         try {
     86             return services.mNetworkService.isBandwidthControlEnabled();
     87         } catch (RemoteException e) {
     88             Log.w(TAG, "problem talking with INetworkManagementService: " + e);
     89             return false;
     90         }
     91     }
     92 }
     93