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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 package com.android.settings.wifi;
     17 
     18 import android.content.Context;
     19 import android.support.v7.preference.PreferenceScreen;
     20 
     21 import com.android.settings.core.PreferenceController;
     22 import com.android.settings.core.instrumentation.MetricsFeatureProvider;
     23 import com.android.settings.core.lifecycle.LifecycleObserver;
     24 import com.android.settings.core.lifecycle.events.OnPause;
     25 import com.android.settings.core.lifecycle.events.OnResume;
     26 import com.android.settings.core.lifecycle.events.OnStart;
     27 import com.android.settings.core.lifecycle.events.OnStop;
     28 import com.android.settings.widget.SummaryUpdater;
     29 import com.android.settings.widget.MasterSwitchPreference;
     30 import com.android.settings.widget.MasterSwitchController;
     31 
     32 public class WifiMasterSwitchPreferenceController extends PreferenceController
     33         implements SummaryUpdater.OnSummaryChangeListener,
     34         LifecycleObserver, OnResume, OnPause, OnStart, OnStop {
     35 
     36     public static final String KEY_TOGGLE_WIFI = "toggle_wifi";
     37 
     38     private MasterSwitchPreference mWifiPreference;
     39     private WifiEnabler mWifiEnabler;
     40     private final WifiSummaryUpdater mSummaryHelper;
     41     private final MetricsFeatureProvider mMetricsFeatureProvider;
     42 
     43     public WifiMasterSwitchPreferenceController(Context context,
     44             MetricsFeatureProvider metricsFeatureProvider) {
     45         super(context);
     46         mMetricsFeatureProvider = metricsFeatureProvider;
     47         mSummaryHelper = new WifiSummaryUpdater(mContext, this);
     48     }
     49 
     50     @Override
     51     public void displayPreference(PreferenceScreen screen) {
     52         super.displayPreference(screen);
     53         mWifiPreference = (MasterSwitchPreference) screen.findPreference(KEY_TOGGLE_WIFI);
     54     }
     55 
     56     @Override
     57     public boolean isAvailable() {
     58         return true;
     59     }
     60 
     61     @Override
     62     public String getPreferenceKey() {
     63         return KEY_TOGGLE_WIFI;
     64     }
     65 
     66     @Override
     67     public void onResume() {
     68         mSummaryHelper.register(true);
     69         if (mWifiEnabler != null) {
     70             mWifiEnabler.resume(mContext);
     71         }
     72     }
     73 
     74     @Override
     75     public void onPause() {
     76         if (mWifiEnabler != null) {
     77             mWifiEnabler.pause();
     78         }
     79         mSummaryHelper.register(false);
     80     }
     81 
     82     @Override
     83     public void onStart() {
     84         mWifiEnabler = new WifiEnabler(mContext, new MasterSwitchController(mWifiPreference),
     85             mMetricsFeatureProvider);
     86     }
     87 
     88     @Override
     89     public void onStop() {
     90         if (mWifiEnabler != null) {
     91             mWifiEnabler.teardownSwitchController();
     92         }
     93     }
     94 
     95     @Override
     96     public void onSummaryChanged(String summary) {
     97         if (mWifiPreference != null) {
     98             mWifiPreference.setSummary(summary);
     99         }
    100     }
    101 
    102 }
    103