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.Context; 20 import android.provider.Settings; 21 import android.support.v14.preference.SwitchPreference; 22 import android.support.v7.preference.Preference; 23 import android.text.TextUtils; 24 25 import com.android.settings.core.PreferenceController; 26 27 /** 28 * {@link PreferenceController} that controls whether we should fall back to celluar when wifi is 29 * bad. 30 */ 31 public class CellularFallbackPreferenceController extends PreferenceController { 32 33 private static final String KEY_CELLULAR_FALLBACK = "wifi_cellular_data_fallback"; 34 35 CellularFallbackPreferenceController(Context context)36 public CellularFallbackPreferenceController(Context context) { 37 super(context); 38 } 39 40 @Override isAvailable()41 public boolean isAvailable() { 42 return !avoidBadWifiConfig(); 43 } 44 45 @Override getPreferenceKey()46 public String getPreferenceKey() { 47 return KEY_CELLULAR_FALLBACK; 48 } 49 50 @Override handlePreferenceTreeClick(Preference preference)51 public boolean handlePreferenceTreeClick(Preference preference) { 52 if (!TextUtils.equals(preference.getKey(), KEY_CELLULAR_FALLBACK)) { 53 return false; 54 } 55 if (!(preference instanceof SwitchPreference)) { 56 return false; 57 } 58 // On: avoid bad wifi. Off: prompt. 59 String settingName = Settings.Global.NETWORK_AVOID_BAD_WIFI; 60 Settings.Global.putString(mContext.getContentResolver(), settingName, 61 ((SwitchPreference) preference).isChecked() ? "1" : null); 62 return true; 63 } 64 65 @Override updateState(Preference preference)66 public void updateState(Preference preference) { 67 final boolean currentSetting = avoidBadWifiCurrentSettings(); 68 // TODO: can this ever be null? The return value of avoidBadWifiConfig() can only 69 // change if the resources change, but if that happens the activity will be recreated... 70 if (preference != null) { 71 SwitchPreference pref = (SwitchPreference) preference; 72 pref.setChecked(currentSetting); 73 } 74 } 75 avoidBadWifiConfig()76 private boolean avoidBadWifiConfig() { 77 return mContext.getResources().getInteger( 78 com.android.internal.R.integer.config_networkAvoidBadWifi) == 1; 79 } 80 avoidBadWifiCurrentSettings()81 private boolean avoidBadWifiCurrentSettings() { 82 return "1".equals(Settings.Global.getString(mContext.getContentResolver(), 83 Settings.Global.NETWORK_AVOID_BAD_WIFI)); 84 } 85 } 86