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.PreferenceControllerMixin; 26 import com.android.settingslib.core.AbstractPreferenceController; 27 28 /** 29 * {@link AbstractPreferenceController} that controls whether we should fall back to celluar when 30 * wifi is bad. 31 */ 32 public class CellularFallbackPreferenceController extends AbstractPreferenceController 33 implements PreferenceControllerMixin { 34 35 private static final String KEY_CELLULAR_FALLBACK = "wifi_cellular_data_fallback"; 36 37 CellularFallbackPreferenceController(Context context)38 public CellularFallbackPreferenceController(Context context) { 39 super(context); 40 } 41 42 @Override isAvailable()43 public boolean isAvailable() { 44 return !avoidBadWifiConfig(); 45 } 46 47 @Override getPreferenceKey()48 public String getPreferenceKey() { 49 return KEY_CELLULAR_FALLBACK; 50 } 51 52 @Override handlePreferenceTreeClick(Preference preference)53 public boolean handlePreferenceTreeClick(Preference preference) { 54 if (!TextUtils.equals(preference.getKey(), KEY_CELLULAR_FALLBACK)) { 55 return false; 56 } 57 if (!(preference instanceof SwitchPreference)) { 58 return false; 59 } 60 // On: avoid bad wifi. Off: prompt. 61 String settingName = Settings.Global.NETWORK_AVOID_BAD_WIFI; 62 Settings.Global.putString(mContext.getContentResolver(), settingName, 63 ((SwitchPreference) preference).isChecked() ? "1" : null); 64 return true; 65 } 66 67 @Override updateState(Preference preference)68 public void updateState(Preference preference) { 69 final boolean currentSetting = avoidBadWifiCurrentSettings(); 70 // TODO: can this ever be null? The return value of avoidBadWifiConfig() can only 71 // change if the resources change, but if that happens the activity will be recreated... 72 if (preference != null) { 73 SwitchPreference pref = (SwitchPreference) preference; 74 pref.setChecked(currentSetting); 75 } 76 } 77 avoidBadWifiConfig()78 private boolean avoidBadWifiConfig() { 79 return mContext.getResources().getInteger( 80 com.android.internal.R.integer.config_networkAvoidBadWifi) == 1; 81 } 82 avoidBadWifiCurrentSettings()83 private boolean avoidBadWifiCurrentSettings() { 84 return "1".equals(Settings.Global.getString(mContext.getContentResolver(), 85 Settings.Global.NETWORK_AVOID_BAD_WIFI)); 86 } 87 } 88