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 26 import androidx.preference.Preference; 27 import androidx.preference.PreferenceScreen; 28 29 import com.android.settings.core.PreferenceControllerMixin; 30 import com.android.settings.core.TogglePreferenceController; 31 import com.android.settingslib.core.lifecycle.LifecycleObserver; 32 import com.android.settingslib.core.lifecycle.events.OnPause; 33 import com.android.settingslib.core.lifecycle.events.OnResume; 34 35 /** 36 * {@link TogglePreferenceController} that controls whether we should notify user when open 37 * network is available. 38 */ 39 public class NotifyOpenNetworksPreferenceController extends TogglePreferenceController 40 implements PreferenceControllerMixin, LifecycleObserver, OnResume, OnPause { 41 42 private static final String KEY_NOTIFY_OPEN_NETWORKS = "notify_open_networks"; 43 private SettingObserver mSettingObserver; 44 NotifyOpenNetworksPreferenceController(Context context)45 public NotifyOpenNetworksPreferenceController(Context context) { 46 super(context, KEY_NOTIFY_OPEN_NETWORKS); 47 } 48 49 @Override displayPreference(PreferenceScreen screen)50 public void displayPreference(PreferenceScreen screen) { 51 super.displayPreference(screen); 52 mSettingObserver = new SettingObserver(screen.findPreference(getPreferenceKey())); 53 } 54 55 @Override onResume()56 public void onResume() { 57 if (mSettingObserver != null) { 58 mSettingObserver.register(mContext.getContentResolver(), true /* register */); 59 } 60 } 61 62 @Override onPause()63 public void onPause() { 64 if (mSettingObserver != null) { 65 mSettingObserver.register(mContext.getContentResolver(), false /* register */); 66 } 67 } 68 69 @Override getAvailabilityStatus()70 public int getAvailabilityStatus() { 71 return AVAILABLE; 72 } 73 74 @Override isChecked()75 public boolean isChecked() { 76 return Settings.Global.getInt(mContext.getContentResolver(), 77 Settings.Global.WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON, 0) == 1; 78 } 79 80 @Override setChecked(boolean isChecked)81 public boolean setChecked(boolean isChecked) { 82 Settings.Global.putInt(mContext.getContentResolver(), 83 Settings.Global.WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON, 84 isChecked ? 1 : 0); 85 return true; 86 } 87 88 class SettingObserver extends ContentObserver { 89 private final Uri NETWORKS_AVAILABLE_URI = Settings.Global.getUriFor( 90 Settings.Global.WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON); 91 92 private final Preference mPreference; 93 SettingObserver(Preference preference)94 public SettingObserver(Preference preference) { 95 super(new Handler()); 96 mPreference = preference; 97 } 98 register(ContentResolver cr, boolean register)99 public void register(ContentResolver cr, boolean register) { 100 if (register) { 101 cr.registerContentObserver(NETWORKS_AVAILABLE_URI, false, this); 102 } else { 103 cr.unregisterContentObserver(this); 104 } 105 } 106 107 @Override onChange(boolean selfChange, Uri uri)108 public void onChange(boolean selfChange, Uri uri) { 109 super.onChange(selfChange, uri); 110 if (NETWORKS_AVAILABLE_URI.equals(uri)) { 111 updateState(mPreference); 112 } 113 } 114 } 115 } 116