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