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.tether; 18 19 import android.content.BroadcastReceiver; 20 import android.content.Context; 21 import android.content.Intent; 22 import android.content.IntentFilter; 23 import android.net.ConnectivityManager; 24 import android.net.wifi.WifiConfiguration; 25 import android.net.wifi.WifiManager; 26 import android.provider.Settings; 27 import android.support.v7.preference.PreferenceScreen; 28 import android.text.BidiFormatter; 29 30 import com.android.settings.R; 31 import com.android.settings.Utils; 32 import com.android.settings.core.PreferenceControllerMixin; 33 import com.android.settings.widget.MasterSwitchController; 34 import com.android.settings.widget.MasterSwitchPreference; 35 import com.android.settingslib.core.AbstractPreferenceController; 36 import com.android.settingslib.core.lifecycle.Lifecycle; 37 import com.android.settingslib.core.lifecycle.LifecycleObserver; 38 import com.android.settingslib.core.lifecycle.events.OnStart; 39 import com.android.settingslib.core.lifecycle.events.OnStop; 40 41 import java.util.List; 42 43 public class WifiTetherPreferenceController extends AbstractPreferenceController 44 implements PreferenceControllerMixin, LifecycleObserver, OnStart, OnStop { 45 46 public static final IntentFilter WIFI_TETHER_INTENT_FILTER; 47 private static final String WIFI_TETHER_SETTINGS = "wifi_tether"; 48 49 private final ConnectivityManager mConnectivityManager; 50 private final String[] mWifiRegexs; 51 private final WifiManager mWifiManager; 52 private final Lifecycle mLifecycle; 53 private WifiTetherSwitchBarController mSwitchController; 54 private MasterSwitchPreference mPreference; 55 56 static { 57 WIFI_TETHER_INTENT_FILTER = new IntentFilter(WifiManager.WIFI_AP_STATE_CHANGED_ACTION); 58 WIFI_TETHER_INTENT_FILTER.addAction(ConnectivityManager.ACTION_TETHER_STATE_CHANGED); 59 WIFI_TETHER_INTENT_FILTER.addAction(Intent.ACTION_AIRPLANE_MODE_CHANGED); 60 } 61 WifiTetherPreferenceController(Context context, Lifecycle lifecycle)62 public WifiTetherPreferenceController(Context context, Lifecycle lifecycle) { 63 super(context); 64 mConnectivityManager = 65 (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); 66 mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE); 67 mWifiRegexs = mConnectivityManager.getTetherableWifiRegexs(); 68 mLifecycle = lifecycle; 69 if (lifecycle != null) { 70 lifecycle.addObserver(this); 71 } 72 } 73 74 @Override isAvailable()75 public boolean isAvailable() { 76 return mWifiRegexs != null 77 && mWifiRegexs.length != 0 78 && WifiTetherSettings.isTetherSettingPageEnabled() 79 && !Utils.isMonkeyRunning(); 80 } 81 82 @Override displayPreference(PreferenceScreen screen)83 public void displayPreference(PreferenceScreen screen) { 84 super.displayPreference(screen); 85 mPreference = (MasterSwitchPreference) screen.findPreference(WIFI_TETHER_SETTINGS); 86 if (mPreference == null) { 87 // unavailable 88 return; 89 } 90 mSwitchController = new WifiTetherSwitchBarController( 91 mContext, new MasterSwitchController(mPreference)); 92 mLifecycle.addObserver(mSwitchController); 93 } 94 95 @Override getPreferenceKey()96 public String getPreferenceKey() { 97 return WIFI_TETHER_SETTINGS; 98 } 99 100 @Override onStart()101 public void onStart() { 102 if (mPreference != null) { 103 mContext.registerReceiver(mReceiver, WIFI_TETHER_INTENT_FILTER); 104 clearSummaryForAirplaneMode(); 105 } 106 } 107 108 @Override onStop()109 public void onStop() { 110 if (mPreference != null) { 111 mContext.unregisterReceiver(mReceiver); 112 } 113 } 114 115 // 116 // Everything below is copied from WifiApEnabler 117 // 118 private final BroadcastReceiver mReceiver = new BroadcastReceiver() { 119 @Override 120 public void onReceive(Context context, Intent intent) { 121 String action = intent.getAction(); 122 if (WifiManager.WIFI_AP_STATE_CHANGED_ACTION.equals(action)) { 123 int state = intent.getIntExtra( 124 WifiManager.EXTRA_WIFI_AP_STATE, WifiManager.WIFI_AP_STATE_FAILED); 125 int reason = intent.getIntExtra(WifiManager.EXTRA_WIFI_AP_FAILURE_REASON, 126 WifiManager.SAP_START_FAILURE_GENERAL); 127 handleWifiApStateChanged(state, reason); 128 } else if (ConnectivityManager.ACTION_TETHER_STATE_CHANGED.equals(action)) { 129 List<String> active = intent.getStringArrayListExtra( 130 ConnectivityManager.EXTRA_ACTIVE_TETHER); 131 List<String> errored = intent.getStringArrayListExtra( 132 ConnectivityManager.EXTRA_ERRORED_TETHER); 133 updateTetherState(active.toArray(), errored.toArray()); 134 } else if (Intent.ACTION_AIRPLANE_MODE_CHANGED.equals(action)) { 135 clearSummaryForAirplaneMode(); 136 } 137 } 138 }; 139 handleWifiApStateChanged(int state, int reason)140 private void handleWifiApStateChanged(int state, int reason) { 141 switch (state) { 142 case WifiManager.WIFI_AP_STATE_ENABLING: 143 mPreference.setSummary(R.string.wifi_tether_starting); 144 break; 145 case WifiManager.WIFI_AP_STATE_ENABLED: 146 /** 147 * Summary on enable is handled by tether 148 * broadcast notice 149 */ 150 break; 151 case WifiManager.WIFI_AP_STATE_DISABLING: 152 mPreference.setSummary(R.string.wifi_tether_stopping); 153 break; 154 case WifiManager.WIFI_AP_STATE_DISABLED: 155 mPreference.setSummary(R.string.wifi_hotspot_off_subtext); 156 clearSummaryForAirplaneMode(); 157 break; 158 default: 159 if (reason == WifiManager.SAP_START_FAILURE_NO_CHANNEL) { 160 mPreference.setSummary(R.string.wifi_sap_no_channel_error); 161 } else { 162 mPreference.setSummary(R.string.wifi_error); 163 } 164 clearSummaryForAirplaneMode(); 165 } 166 } 167 updateTetherState(Object[] tethered, Object[] errored)168 private void updateTetherState(Object[] tethered, Object[] errored) { 169 boolean wifiTethered = matchRegex(tethered); 170 boolean wifiErrored = matchRegex(errored); 171 172 if (wifiTethered) { 173 WifiConfiguration wifiConfig = mWifiManager.getWifiApConfiguration(); 174 updateConfigSummary(wifiConfig); 175 } else if (wifiErrored) { 176 mPreference.setSummary(R.string.wifi_error); 177 } else { 178 mPreference.setSummary(R.string.wifi_hotspot_off_subtext); 179 } 180 } 181 matchRegex(Object[] tethers)182 private boolean matchRegex(Object[] tethers) { 183 for (Object o : tethers) { 184 String s = (String) o; 185 for (String regex : mWifiRegexs) { 186 if (s.matches(regex)) { 187 return true; 188 } 189 } 190 } 191 return false; 192 } 193 updateConfigSummary(WifiConfiguration wifiConfig)194 private void updateConfigSummary(WifiConfiguration wifiConfig) { 195 final String s = mContext.getString( 196 com.android.internal.R.string.wifi_tether_configure_ssid_default); 197 198 mPreference.setSummary(mContext.getString(R.string.wifi_tether_enabled_subtext, 199 BidiFormatter.getInstance().unicodeWrap( 200 (wifiConfig == null) ? s : wifiConfig.SSID))); 201 } 202 clearSummaryForAirplaneMode()203 private void clearSummaryForAirplaneMode() { 204 boolean isAirplaneMode = Settings.Global.getInt(mContext.getContentResolver(), 205 Settings.Global.AIRPLANE_MODE_ON, 0) != 0; 206 if (isAirplaneMode) { 207 mPreference.setSummary(R.string.summary_placeholder); 208 } 209 } 210 // 211 // Everything above is copied from WifiApEnabler 212 // 213 } 214