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 30 import com.android.settings.core.PreferenceControllerMixin; 31 import com.android.settingslib.core.AbstractPreferenceController; 32 import com.android.settingslib.core.lifecycle.Lifecycle; 33 import com.android.settingslib.core.lifecycle.LifecycleObserver; 34 import com.android.settingslib.core.lifecycle.events.OnPause; 35 import com.android.settingslib.core.lifecycle.events.OnResume; 36 37 /** 38 * {@link AbstractPreferenceController} that controls whether we should notify user when open 39 * network is available. 40 */ 41 public class NotifyOpenNetworksPreferenceController extends AbstractPreferenceController 42 implements PreferenceControllerMixin, LifecycleObserver, OnResume, OnPause { 43 44 private static final String KEY_NOTIFY_OPEN_NETWORKS = "notify_open_networks"; 45 private SettingObserver mSettingObserver; 46 NotifyOpenNetworksPreferenceController(Context context, Lifecycle lifecycle)47 public NotifyOpenNetworksPreferenceController(Context context, Lifecycle lifecycle) { 48 super(context); 49 lifecycle.addObserver(this); 50 } 51 52 @Override displayPreference(PreferenceScreen screen)53 public void displayPreference(PreferenceScreen screen) { 54 super.displayPreference(screen); 55 mSettingObserver = new SettingObserver(screen.findPreference(KEY_NOTIFY_OPEN_NETWORKS)); 56 } 57 58 @Override onResume()59 public void onResume() { 60 if (mSettingObserver != null) { 61 mSettingObserver.register(mContext.getContentResolver(), true /* register */); 62 } 63 } 64 65 @Override onPause()66 public void onPause() { 67 if (mSettingObserver != null) { 68 mSettingObserver.register(mContext.getContentResolver(), false /* register */); 69 } 70 } 71 72 @Override isAvailable()73 public boolean isAvailable() { 74 return true; 75 } 76 77 @Override handlePreferenceTreeClick(Preference preference)78 public boolean handlePreferenceTreeClick(Preference preference) { 79 if (!TextUtils.equals(preference.getKey(), KEY_NOTIFY_OPEN_NETWORKS)) { 80 return false; 81 } 82 if (!(preference instanceof SwitchPreference)) { 83 return false; 84 } 85 Settings.Global.putInt(mContext.getContentResolver(), 86 Settings.Global.WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON, 87 ((SwitchPreference) preference).isChecked() ? 1 : 0); 88 return true; 89 } 90 91 @Override getPreferenceKey()92 public String getPreferenceKey() { 93 return KEY_NOTIFY_OPEN_NETWORKS; 94 } 95 96 @Override updateState(Preference preference)97 public void updateState(Preference preference) { 98 if (!(preference instanceof SwitchPreference)) { 99 return; 100 } 101 final SwitchPreference notifyOpenNetworks = (SwitchPreference) preference; 102 notifyOpenNetworks.setChecked(Settings.Global.getInt(mContext.getContentResolver(), 103 Settings.Global.WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON, 0) == 1); 104 } 105 106 class SettingObserver extends ContentObserver { 107 private final Uri NETWORKS_AVAILABLE_URI = Settings.Global.getUriFor( 108 Settings.Global.WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON); 109 110 private final Preference mPreference; 111 SettingObserver(Preference preference)112 public SettingObserver(Preference preference) { 113 super(new Handler()); 114 mPreference = preference; 115 } 116 register(ContentResolver cr, boolean register)117 public void register(ContentResolver cr, boolean register) { 118 if (register) { 119 cr.registerContentObserver(NETWORKS_AVAILABLE_URI, false, this); 120 } else { 121 cr.unregisterContentObserver(this); 122 } 123 } 124 125 @Override onChange(boolean selfChange, Uri uri)126 public void onChange(boolean selfChange, Uri uri) { 127 super.onChange(selfChange, uri); 128 if (NETWORKS_AVAILABLE_URI.equals(uri)) { 129 updateState(mPreference); 130 } 131 } 132 } 133 } 134