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      1 /*
      2  * Copyright (C) 2017 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.wifi.tether;
     18 
     19 import static android.net.ConnectivityManager.TETHERING_WIFI;
     20 
     21 import android.content.BroadcastReceiver;
     22 import android.content.Context;
     23 import android.content.Intent;
     24 import android.net.ConnectivityManager;
     25 import android.net.wifi.WifiManager;
     26 import android.os.Handler;
     27 import android.os.Looper;
     28 import android.provider.Settings;
     29 
     30 import com.android.settings.datausage.DataSaverBackend;
     31 import com.android.settings.widget.SwitchWidgetController;
     32 import com.android.settingslib.core.lifecycle.LifecycleObserver;
     33 import com.android.settingslib.core.lifecycle.events.OnStart;
     34 import com.android.settingslib.core.lifecycle.events.OnStop;
     35 
     36 public class WifiTetherSwitchBarController implements SwitchWidgetController.OnSwitchChangeListener,
     37         LifecycleObserver, OnStart, OnStop {
     38 
     39     private final Context mContext;
     40     private final SwitchWidgetController mSwitchBar;
     41     private final ConnectivityManager mConnectivityManager;
     42     private final DataSaverBackend mDataSaverBackend;
     43     private final WifiManager mWifiManager;
     44 
     45     WifiTetherSwitchBarController(Context context, SwitchWidgetController switchBar) {
     46         mContext = context;
     47         mSwitchBar = switchBar;
     48         mDataSaverBackend = new DataSaverBackend(context);
     49         mConnectivityManager =
     50                 (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
     51         mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
     52         mSwitchBar.setChecked(mWifiManager.getWifiApState() == WifiManager.WIFI_AP_STATE_ENABLED);
     53         mSwitchBar.setListener(this);
     54     }
     55 
     56     @Override
     57     public void onStart() {
     58         mSwitchBar.startListening();
     59         mContext.registerReceiver(mReceiver,
     60                 WifiTetherPreferenceController.WIFI_TETHER_INTENT_FILTER);
     61     }
     62 
     63     @Override
     64     public void onStop() {
     65         mSwitchBar.stopListening();
     66         mContext.unregisterReceiver(mReceiver);
     67     }
     68 
     69     @Override
     70     public boolean onSwitchToggled(boolean isChecked) {
     71         if (isChecked) {
     72             startTether();
     73         } else {
     74             stopTether();
     75         }
     76         return true;
     77     }
     78 
     79     void stopTether() {
     80         mSwitchBar.setEnabled(false);
     81         mConnectivityManager.stopTethering(TETHERING_WIFI);
     82     }
     83 
     84     void startTether() {
     85         mSwitchBar.setEnabled(false);
     86         mConnectivityManager.startTethering(TETHERING_WIFI, true /* showProvisioningUi */,
     87                 NoOpOnStartTetheringCallback.newInstance(), new Handler(Looper.getMainLooper()));
     88     }
     89 
     90     private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
     91         @Override
     92         public void onReceive(Context context, Intent intent) {
     93             String action = intent.getAction();
     94             if (WifiManager.WIFI_AP_STATE_CHANGED_ACTION.equals(action)) {
     95                 final int state = intent.getIntExtra(
     96                         WifiManager.EXTRA_WIFI_AP_STATE, WifiManager.WIFI_AP_STATE_FAILED);
     97                 handleWifiApStateChanged(state);
     98             } else if (Intent.ACTION_AIRPLANE_MODE_CHANGED.equals(action)) {
     99                 enableWifiSwitch();
    100             }
    101         }
    102     };
    103 
    104     private void handleWifiApStateChanged(int state) {
    105         switch (state) {
    106             case WifiManager.WIFI_AP_STATE_ENABLING:
    107                 mSwitchBar.setEnabled(false);
    108                 break;
    109             case WifiManager.WIFI_AP_STATE_ENABLED:
    110                 if (!mSwitchBar.isChecked()) {
    111                     mSwitchBar.setChecked(true);
    112                 }
    113                 enableWifiSwitch();
    114                 break;
    115             case WifiManager.WIFI_AP_STATE_DISABLING:
    116                 if (mSwitchBar.isChecked()) {
    117                     mSwitchBar.setChecked(false);
    118                 }
    119                 mSwitchBar.setEnabled(false);
    120                 break;
    121             case WifiManager.WIFI_AP_STATE_DISABLED:
    122                 mSwitchBar.setChecked(false);
    123                 enableWifiSwitch();
    124                 break;
    125             default:
    126                 mSwitchBar.setChecked(false);
    127                 enableWifiSwitch();
    128                 break;
    129         }
    130     }
    131 
    132     private void enableWifiSwitch() {
    133         boolean isAirplaneMode = Settings.Global.getInt(mContext.getContentResolver(),
    134                 Settings.Global.AIRPLANE_MODE_ON, 0) != 0;
    135         if (!isAirplaneMode) {
    136             mSwitchBar.setEnabled(!mDataSaverBackend.isDataSaverEnabled());
    137         } else {
    138             mSwitchBar.setEnabled(false);
    139         }
    140     }
    141 }
    142