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      1 /*
      2  * Copyright (C) 2010 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.server.wifi;
     18 
     19 import android.os.BatteryStats;
     20 import android.os.RemoteException;
     21 import android.util.Log;
     22 
     23 import com.android.internal.app.IBatteryStats;
     24 
     25 /**
     26  * This class is used to track WifiState to update BatteryStats
     27  */
     28 public class WifiStateTracker {
     29     private static final String TAG = "WifiStateTracker";
     30 
     31     public static final int INVALID = 0;
     32     public static final int SCAN_MODE = 1;
     33     public static final int DISCONNECTED = 2;
     34     public static final int CONNECTED = 3;
     35     public static final int SOFT_AP = 4;
     36     private int mWifiState;
     37     private IBatteryStats mBatteryStats;
     38 
     39     public WifiStateTracker(IBatteryStats stats) {
     40         mWifiState = INVALID;
     41         mBatteryStats = stats;
     42     }
     43 
     44     private void informWifiStateBatteryStats(int state) {
     45         try {
     46             mBatteryStats.noteWifiState(state, null);
     47         } catch (RemoteException e) {
     48             Log.e(TAG, "Battery stats unreachable " + e.getMessage());
     49         }
     50     }
     51 
     52     /**
     53      * Inform the WifiState to this tracker to translate into the
     54      * WifiState corresponding to BatteryStats.
     55      * @param state state corresponding to the WifiStateMachine state
     56      */
     57     public void updateState(int state) {
     58         int reportState = BatteryStats.WIFI_STATE_OFF;
     59         if (state != mWifiState) {
     60             switch(state) {
     61                 case SCAN_MODE:
     62                     reportState = BatteryStats.WIFI_STATE_OFF_SCANNING;
     63                     break;
     64                 case DISCONNECTED:
     65                     reportState = BatteryStats.WIFI_STATE_ON_DISCONNECTED;
     66                     break;
     67                 case CONNECTED:
     68                     reportState = BatteryStats.WIFI_STATE_ON_CONNECTED_STA;
     69                     break;
     70                 case SOFT_AP:
     71                     reportState = BatteryStats.WIFI_STATE_SOFT_AP;
     72                     break;
     73                 case INVALID:
     74                     mWifiState = INVALID;
     75                     /* Fall through */
     76                 default:
     77                     return;
     78             }
     79             mWifiState = state;
     80             informWifiStateBatteryStats(reportState);
     81         }
     82         return;
     83     }
     84 }
     85