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; 18 19 import android.content.ContentResolver; 20 import android.content.Context; 21 import android.database.ContentObserver; 22 import android.net.Uri; 23 import android.os.Handler; 24 import android.provider.Settings; 25 import android.support.v14.preference.SwitchPreference; 26 import android.support.v7.preference.Preference; 27 import android.support.v7.preference.PreferenceScreen; 28 import android.text.TextUtils; 29 import com.android.settings.R; 30 31 import com.android.settings.core.PreferenceController; 32 import com.android.settings.core.lifecycle.Lifecycle; 33 import com.android.settings.core.lifecycle.LifecycleObserver; 34 import com.android.settings.core.lifecycle.events.OnPause; 35 import com.android.settings.core.lifecycle.events.OnResume; 36 37 /** 38 * {@link PreferenceController} that controls whether the Wi-Fi Wakeup feature should be enabled. 39 */ 40 public class WifiWakeupPreferenceController extends PreferenceController implements 41 LifecycleObserver, OnResume, OnPause { 42 43 private static final String KEY_ENABLE_WIFI_WAKEUP = "enable_wifi_wakeup"; 44 private SettingObserver mSettingObserver; 45 WifiWakeupPreferenceController(Context context, Lifecycle lifecycle)46 public WifiWakeupPreferenceController(Context context, Lifecycle lifecycle) { 47 super(context); 48 lifecycle.addObserver(this); 49 } 50 51 @Override displayPreference(PreferenceScreen screen)52 public void displayPreference(PreferenceScreen screen) { 53 super.displayPreference(screen); 54 mSettingObserver = new SettingObserver(screen.findPreference(KEY_ENABLE_WIFI_WAKEUP)); 55 } 56 57 @Override onResume()58 public void onResume() { 59 if (mSettingObserver != null) { 60 mSettingObserver.register(mContext.getContentResolver(), true /* register */); 61 } 62 } 63 64 @Override onPause()65 public void onPause() { 66 if (mSettingObserver != null) { 67 mSettingObserver.register(mContext.getContentResolver(), false /* register */); 68 } 69 } 70 71 @Override isAvailable()72 public boolean isAvailable() { 73 final int defaultValue = mContext.getResources().getInteger( 74 com.android.internal.R.integer.config_wifi_wakeup_available); 75 return Settings.Global.getInt(mContext.getContentResolver(), 76 Settings.Global.WIFI_WAKEUP_AVAILABLE, defaultValue) == 1; 77 } 78 79 @Override handlePreferenceTreeClick(Preference preference)80 public boolean handlePreferenceTreeClick(Preference preference) { 81 if (!TextUtils.equals(preference.getKey(), KEY_ENABLE_WIFI_WAKEUP)) { 82 return false; 83 } 84 if (!(preference instanceof SwitchPreference)) { 85 return false; 86 } 87 Settings.Global.putInt(mContext.getContentResolver(), 88 Settings.Global.WIFI_WAKEUP_ENABLED, 89 ((SwitchPreference) preference).isChecked() ? 1 : 0); 90 return true; 91 } 92 93 @Override getPreferenceKey()94 public String getPreferenceKey() { 95 return KEY_ENABLE_WIFI_WAKEUP; 96 } 97 98 @Override updateState(Preference preference)99 public void updateState(Preference preference) { 100 if (!(preference instanceof SwitchPreference)) { 101 return; 102 } 103 final SwitchPreference enableWifiWakeup = (SwitchPreference) preference; 104 105 enableWifiWakeup.setChecked(Settings.Global.getInt(mContext.getContentResolver(), 106 Settings.Global.WIFI_WAKEUP_ENABLED, 0) == 1); 107 108 boolean wifiScanningEnabled = Settings.Global.getInt(mContext.getContentResolver(), 109 Settings.Global.WIFI_SCAN_ALWAYS_AVAILABLE, 0) == 1; 110 boolean networkRecommendationsEnabled = Settings.Global.getInt( 111 mContext.getContentResolver(), 112 Settings.Global.NETWORK_RECOMMENDATIONS_ENABLED, 0) == 1; 113 enableWifiWakeup.setEnabled(networkRecommendationsEnabled && wifiScanningEnabled); 114 115 enableWifiWakeup.setSummary(wifiScanningEnabled ? 116 R.string.wifi_wakeup_summary : 117 R.string.wifi_wakeup_summary_scanning_disabled); 118 } 119 120 class SettingObserver extends ContentObserver { 121 private final Uri NETWORK_RECOMMENDATIONS_ENABLED_URI = 122 Settings.Global.getUriFor(Settings.Global.NETWORK_RECOMMENDATIONS_ENABLED); 123 124 private final Preference mPreference; 125 SettingObserver(Preference preference)126 public SettingObserver(Preference preference) { 127 super(new Handler()); 128 mPreference = preference; 129 } 130 register(ContentResolver cr, boolean register)131 public void register(ContentResolver cr, boolean register) { 132 if (register) { 133 cr.registerContentObserver(NETWORK_RECOMMENDATIONS_ENABLED_URI, false, this); 134 } else { 135 cr.unregisterContentObserver(this); 136 } 137 } 138 139 @Override onChange(boolean selfChange, Uri uri)140 public void onChange(boolean selfChange, Uri uri) { 141 super.onChange(selfChange, uri); 142 if (NETWORK_RECOMMENDATIONS_ENABLED_URI.equals(uri)) { 143 updateState(mPreference); 144 } 145 } 146 } 147 } 148