WifiSettings.java revision 53fa78fcb237e52733d00a93a29485c4b3d7d290
1/* 2 * Copyright (C) 2010 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 17package com.android.settings.wifi; 18 19import static android.net.wifi.WifiConfiguration.INVALID_NETWORK_ID; 20 21import android.app.ActionBar; 22import android.app.Activity; 23import android.app.AlertDialog; 24import android.app.Dialog; 25import android.content.BroadcastReceiver; 26import android.content.Context; 27import android.content.DialogInterface; 28import android.content.Intent; 29import android.content.IntentFilter; 30import android.content.pm.PackageManager; 31import android.net.ConnectivityManager; 32import android.net.NetworkInfo; 33import android.net.NetworkInfo.DetailedState; 34import android.net.wifi.ScanResult; 35import android.net.wifi.SupplicantState; 36import android.net.wifi.WifiConfiguration; 37import android.net.wifi.WifiConfiguration.KeyMgmt; 38import android.net.wifi.WifiInfo; 39import android.net.wifi.WifiManager; 40import android.net.wifi.WpsInfo; 41import android.os.Bundle; 42import android.os.Handler; 43import android.os.Message; 44import android.preference.Preference; 45import android.preference.PreferenceActivity; 46import android.preference.PreferenceScreen; 47import android.security.Credentials; 48import android.security.KeyStore; 49import android.util.Log; 50import android.view.ContextMenu; 51import android.view.ContextMenu.ContextMenuInfo; 52import android.view.Gravity; 53import android.view.Menu; 54import android.view.MenuInflater; 55import android.view.MenuItem; 56import android.view.View; 57import android.widget.AdapterView.AdapterContextMenuInfo; 58import android.widget.Switch; 59import android.widget.TextView; 60import android.widget.Toast; 61 62import com.android.settings.R; 63import com.android.settings.SettingsPreferenceFragment; 64import com.android.settings.wifi.p2p.WifiP2pSettings; 65 66import java.util.ArrayList; 67import java.util.Collection; 68import java.util.Collections; 69import java.util.HashMap; 70import java.util.List; 71import java.util.concurrent.atomic.AtomicBoolean; 72 73/** 74 * Two types of UI are provided here. 75 * 76 * The first is for "usual Settings", appearing as any other Setup fragment. 77 * 78 * The second is for Setup Wizard, with a simplified interface that hides the action bar 79 * and menus. 80 */ 81public class WifiSettings extends SettingsPreferenceFragment 82 implements DialogInterface.OnClickListener { 83 private static final String TAG = "WifiSettings"; 84 private static final int MENU_ID_WPS_PBC = Menu.FIRST; 85 private static final int MENU_ID_WPS_PIN = Menu.FIRST + 1; 86 private static final int MENU_ID_P2P = Menu.FIRST + 2; 87 private static final int MENU_ID_ADD_NETWORK = Menu.FIRST + 3; 88 private static final int MENU_ID_ADVANCED = Menu.FIRST + 4; 89 private static final int MENU_ID_SCAN = Menu.FIRST + 5; 90 private static final int MENU_ID_CONNECT = Menu.FIRST + 6; 91 private static final int MENU_ID_FORGET = Menu.FIRST + 7; 92 private static final int MENU_ID_MODIFY = Menu.FIRST + 8; 93 94 private static final int WIFI_DIALOG_ID = 1; 95 private static final int WPS_PBC_DIALOG_ID = 2; 96 private static final int WPS_PIN_DIALOG_ID = 3; 97 98 // Combo scans can take 5-6s to complete - set to 10s. 99 private static final int WIFI_RESCAN_INTERVAL_MS = 10 * 1000; 100 101 // Instance state keys 102 private static final String SAVE_DIALOG_EDIT_MODE = "edit_mode"; 103 private static final String SAVE_DIALOG_ACCESS_POINT_STATE = "wifi_ap_state"; 104 105 private final IntentFilter mFilter; 106 private final BroadcastReceiver mReceiver; 107 private final Scanner mScanner; 108 109 private WifiManager mWifiManager; 110 private WifiManager.Channel mChannel; 111 private WifiManager.ActionListener mConnectListener; 112 private WifiManager.ActionListener mSaveListener; 113 private WifiManager.ActionListener mForgetListener; 114 private boolean mP2pSupported; 115 116 117 private WifiEnabler mWifiEnabler; 118 // An access point being editted is stored here. 119 private AccessPoint mSelectedAccessPoint; 120 121 private DetailedState mLastState; 122 private WifiInfo mLastInfo; 123 124 private AtomicBoolean mConnected = new AtomicBoolean(false); 125 126 private int mKeyStoreNetworkId = INVALID_NETWORK_ID; 127 128 private WifiDialog mDialog; 129 130 private TextView mEmptyView; 131 132 /* Used in Wifi Setup context */ 133 134 // this boolean extra specifies whether to disable the Next button when not connected 135 private static final String EXTRA_ENABLE_NEXT_ON_CONNECT = "wifi_enable_next_on_connect"; 136 137 // this boolean extra specifies whether to auto finish when connection is established 138 private static final String EXTRA_AUTO_FINISH_ON_CONNECT = "wifi_auto_finish_on_connect"; 139 140 // this boolean extra is set if we are being invoked by the Setup Wizard 141 private static final String EXTRA_IS_FIRST_RUN = "firstRun"; 142 143 private static final String EXTRA_WIFI_DISABLE_BACK = "wifi_disable_back"; 144 145 // should Next button only be enabled when we have a connection? 146 private boolean mEnableNextOnConnection; 147 148 // should activity finish once we have a connection? 149 private boolean mAutoFinishOnConnection; 150 151 // Save the dialog details 152 private boolean mDlgEdit; 153 private AccessPoint mDlgAccessPoint; 154 private Bundle mAccessPointSavedState; 155 156 // the action bar uses a different set of controls for Setup Wizard 157 private boolean mSetupWizardMode; 158 159 /* End of "used in Wifi Setup context" */ 160 161 public WifiSettings() { 162 mFilter = new IntentFilter(); 163 mFilter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION); 164 mFilter.addAction(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION); 165 mFilter.addAction(WifiManager.NETWORK_IDS_CHANGED_ACTION); 166 mFilter.addAction(WifiManager.SUPPLICANT_STATE_CHANGED_ACTION); 167 mFilter.addAction(WifiManager.CONFIGURED_NETWORKS_CHANGED_ACTION); 168 mFilter.addAction(WifiManager.LINK_CONFIGURATION_CHANGED_ACTION); 169 mFilter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION); 170 mFilter.addAction(WifiManager.RSSI_CHANGED_ACTION); 171 172 mReceiver = new BroadcastReceiver() { 173 @Override 174 public void onReceive(Context context, Intent intent) { 175 handleEvent(context, intent); 176 } 177 }; 178 179 mScanner = new Scanner(); 180 } 181 182 @Override 183 public void onCreate(Bundle icicle) { 184 // Set this flag early, as it's needed by getHelpResource(), which is called by super 185 mSetupWizardMode = getActivity().getIntent().getBooleanExtra(EXTRA_IS_FIRST_RUN, false); 186 187 super.onCreate(icicle); 188 } 189 190 @Override 191 public void onActivityCreated(Bundle savedInstanceState) { 192 // We don't call super.onActivityCreated() here, since it assumes we already set up 193 // Preference (probably in onCreate()), while WifiSettings exceptionally set it up in 194 // this method. 195 196 mP2pSupported = getPackageManager().hasSystemFeature(PackageManager.FEATURE_WIFI_DIRECT); 197 mWifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE); 198 mChannel = mWifiManager.initialize(getActivity(), getActivity().getMainLooper(), null); 199 200 mConnectListener = new WifiManager.ActionListener() { 201 public void onSuccess() { 202 } 203 public void onFailure(int reason) { 204 Toast.makeText(getActivity(), 205 R.string.wifi_failed_connect_message, 206 Toast.LENGTH_SHORT).show(); 207 } 208 }; 209 210 mSaveListener = new WifiManager.ActionListener() { 211 public void onSuccess() { 212 } 213 public void onFailure(int reason) { 214 Toast.makeText(getActivity(), 215 R.string.wifi_failed_save_message, 216 Toast.LENGTH_SHORT).show(); 217 } 218 }; 219 220 mForgetListener = new WifiManager.ActionListener() { 221 public void onSuccess() { 222 } 223 public void onFailure(int reason) { 224 Toast.makeText(getActivity(), 225 R.string.wifi_failed_forget_message, 226 Toast.LENGTH_SHORT).show(); 227 } 228 }; 229 230 if (savedInstanceState != null 231 && savedInstanceState.containsKey(SAVE_DIALOG_ACCESS_POINT_STATE)) { 232 mDlgEdit = savedInstanceState.getBoolean(SAVE_DIALOG_EDIT_MODE); 233 mAccessPointSavedState = savedInstanceState.getBundle(SAVE_DIALOG_ACCESS_POINT_STATE); 234 } 235 236 final Activity activity = getActivity(); 237 final Intent intent = activity.getIntent(); 238 239 // first if we're supposed to finish once we have a connection 240 mAutoFinishOnConnection = intent.getBooleanExtra(EXTRA_AUTO_FINISH_ON_CONNECT, false); 241 242 if (mAutoFinishOnConnection) { 243 // Hide the next button 244 if (hasNextButton()) { 245 getNextButton().setVisibility(View.GONE); 246 } 247 248 final ConnectivityManager connectivity = (ConnectivityManager) 249 getActivity().getSystemService(Context.CONNECTIVITY_SERVICE); 250 if (connectivity != null 251 && connectivity.getNetworkInfo(ConnectivityManager.TYPE_WIFI).isConnected()) { 252 activity.finish(); 253 return; 254 } 255 } 256 257 // if we're supposed to enable/disable the Next button based on our current connection 258 // state, start it off in the right state 259 mEnableNextOnConnection = intent.getBooleanExtra(EXTRA_ENABLE_NEXT_ON_CONNECT, false); 260 261 if (mEnableNextOnConnection) { 262 if (hasNextButton()) { 263 final ConnectivityManager connectivity = (ConnectivityManager) 264 getActivity().getSystemService(Context.CONNECTIVITY_SERVICE); 265 if (connectivity != null) { 266 NetworkInfo info = connectivity.getNetworkInfo( 267 ConnectivityManager.TYPE_WIFI); 268 changeNextButtonState(info.isConnected()); 269 } 270 } 271 } 272 273 addPreferencesFromResource(R.xml.wifi_settings); 274 275 // Back key is disabled if requested 276 if (intent.getBooleanExtra(EXTRA_WIFI_DISABLE_BACK, false)) { 277 getView().setSystemUiVisibility(View.STATUS_BAR_DISABLE_BACK); 278 } 279 280 // On/off switch is hidden for Setup Wizard 281 if (!mSetupWizardMode) { 282 Switch actionBarSwitch = new Switch(activity); 283 284 if (activity instanceof PreferenceActivity) { 285 PreferenceActivity preferenceActivity = (PreferenceActivity) activity; 286 if (preferenceActivity.onIsHidingHeaders() || !preferenceActivity.onIsMultiPane()) { 287 final int padding = activity.getResources().getDimensionPixelSize( 288 R.dimen.action_bar_switch_padding); 289 actionBarSwitch.setPadding(0, 0, padding, 0); 290 activity.getActionBar().setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM, 291 ActionBar.DISPLAY_SHOW_CUSTOM); 292 activity.getActionBar().setCustomView(actionBarSwitch, new ActionBar.LayoutParams( 293 ActionBar.LayoutParams.WRAP_CONTENT, 294 ActionBar.LayoutParams.WRAP_CONTENT, 295 Gravity.CENTER_VERTICAL | Gravity.RIGHT)); 296 } 297 } 298 299 mWifiEnabler = new WifiEnabler(activity, actionBarSwitch); 300 } 301 302 mEmptyView = (TextView) getView().findViewById(android.R.id.empty); 303 getListView().setEmptyView(mEmptyView); 304 305 if (!mSetupWizardMode) { 306 registerForContextMenu(getListView()); 307 } 308 setHasOptionsMenu(true); 309 310 // After confirming PreferenceScreen is available, we call super. 311 super.onActivityCreated(savedInstanceState); 312 } 313 314 @Override 315 public void onResume() { 316 super.onResume(); 317 if (mWifiEnabler != null) { 318 mWifiEnabler.resume(); 319 } 320 321 getActivity().registerReceiver(mReceiver, mFilter); 322 if (mKeyStoreNetworkId != INVALID_NETWORK_ID && 323 KeyStore.getInstance().state() == KeyStore.State.UNLOCKED) { 324 mWifiManager.connect(mChannel, mKeyStoreNetworkId, mConnectListener); 325 } 326 mKeyStoreNetworkId = INVALID_NETWORK_ID; 327 328 updateAccessPoints(); 329 } 330 331 @Override 332 public void onPause() { 333 super.onPause(); 334 if (mWifiEnabler != null) { 335 mWifiEnabler.pause(); 336 } 337 getActivity().unregisterReceiver(mReceiver); 338 mScanner.pause(); 339 } 340 341 @Override 342 public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { 343 final boolean wifiIsEnabled = mWifiManager.isWifiEnabled(); 344 if (mSetupWizardMode) { 345 // FIXME: add setIcon() when graphics are available 346 menu.add(Menu.NONE, MENU_ID_WPS_PBC, 0, R.string.wifi_menu_wps_pbc) 347 .setEnabled(wifiIsEnabled) 348 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 349 menu.add(Menu.NONE, MENU_ID_ADD_NETWORK, 0, R.string.wifi_add_network) 350 .setEnabled(wifiIsEnabled) 351 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 352 } else { 353 menu.add(Menu.NONE, MENU_ID_WPS_PBC, 0, R.string.wifi_menu_wps_pbc) 354 .setEnabled(wifiIsEnabled) 355 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 356 menu.add(Menu.NONE, MENU_ID_ADD_NETWORK, 0, R.string.wifi_add_network) 357 .setEnabled(wifiIsEnabled) 358 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 359 menu.add(Menu.NONE, MENU_ID_SCAN, 0, R.string.wifi_menu_scan) 360 //.setIcon(R.drawable.ic_menu_scan_network) 361 .setEnabled(wifiIsEnabled) 362 .setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER); 363 menu.add(Menu.NONE, MENU_ID_WPS_PIN, 0, R.string.wifi_menu_wps_pin) 364 .setEnabled(wifiIsEnabled) 365 .setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER); 366 if (mP2pSupported) { 367 menu.add(Menu.NONE, MENU_ID_P2P, 0, R.string.wifi_menu_p2p) 368 .setEnabled(wifiIsEnabled) 369 .setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER); 370 } 371 menu.add(Menu.NONE, MENU_ID_ADVANCED, 0, R.string.wifi_menu_advanced) 372 //.setIcon(android.R.drawable.ic_menu_manage) 373 .setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER); 374 } 375 super.onCreateOptionsMenu(menu, inflater); 376 } 377 378 @Override 379 public void onSaveInstanceState(Bundle outState) { 380 super.onSaveInstanceState(outState); 381 382 // If the dialog is showing, save its state. 383 if (mDialog != null && mDialog.isShowing()) { 384 outState.putBoolean(SAVE_DIALOG_EDIT_MODE, mDlgEdit); 385 if (mDlgAccessPoint != null) { 386 mAccessPointSavedState = new Bundle(); 387 mDlgAccessPoint.saveWifiState(mAccessPointSavedState); 388 outState.putBundle(SAVE_DIALOG_ACCESS_POINT_STATE, mAccessPointSavedState); 389 } 390 } 391 } 392 393 @Override 394 public boolean onOptionsItemSelected(MenuItem item) { 395 switch (item.getItemId()) { 396 case MENU_ID_WPS_PBC: 397 showDialog(WPS_PBC_DIALOG_ID); 398 return true; 399 case MENU_ID_P2P: 400 if (getActivity() instanceof PreferenceActivity) { 401 ((PreferenceActivity) getActivity()).startPreferencePanel( 402 WifiP2pSettings.class.getCanonicalName(), 403 null, 404 R.string.wifi_p2p_settings_title, null, 405 this, 0); 406 } else { 407 startFragment(this, WifiP2pSettings.class.getCanonicalName(), -1, null); 408 } 409 return true; 410 case MENU_ID_WPS_PIN: 411 showDialog(WPS_PIN_DIALOG_ID); 412 return true; 413 case MENU_ID_SCAN: 414 if (mWifiManager.isWifiEnabled()) { 415 mScanner.forceScan(); 416 } 417 return true; 418 case MENU_ID_ADD_NETWORK: 419 if (mWifiManager.isWifiEnabled()) { 420 onAddNetworkPressed(); 421 } 422 return true; 423 case MENU_ID_ADVANCED: 424 if (getActivity() instanceof PreferenceActivity) { 425 ((PreferenceActivity) getActivity()).startPreferencePanel( 426 AdvancedWifiSettings.class.getCanonicalName(), 427 null, 428 R.string.wifi_advanced_titlebar, null, 429 this, 0); 430 } else { 431 startFragment(this, AdvancedWifiSettings.class.getCanonicalName(), -1, null); 432 } 433 return true; 434 } 435 return super.onOptionsItemSelected(item); 436 } 437 438 @Override 439 public void onCreateContextMenu(ContextMenu menu, View view, ContextMenuInfo info) { 440 if (info instanceof AdapterContextMenuInfo) { 441 Preference preference = (Preference) getListView().getItemAtPosition( 442 ((AdapterContextMenuInfo) info).position); 443 444 if (preference instanceof AccessPoint) { 445 mSelectedAccessPoint = (AccessPoint) preference; 446 menu.setHeaderTitle(mSelectedAccessPoint.ssid); 447 if (mSelectedAccessPoint.getLevel() != -1 448 && mSelectedAccessPoint.getState() == null) { 449 menu.add(Menu.NONE, MENU_ID_CONNECT, 0, R.string.wifi_menu_connect); 450 } 451 if (mSelectedAccessPoint.networkId != INVALID_NETWORK_ID) { 452 menu.add(Menu.NONE, MENU_ID_FORGET, 0, R.string.wifi_menu_forget); 453 menu.add(Menu.NONE, MENU_ID_MODIFY, 0, R.string.wifi_menu_modify); 454 } 455 } 456 } 457 } 458 459 @Override 460 public boolean onContextItemSelected(MenuItem item) { 461 if (mSelectedAccessPoint == null) { 462 return super.onContextItemSelected(item); 463 } 464 switch (item.getItemId()) { 465 case MENU_ID_CONNECT: { 466 if (mSelectedAccessPoint.networkId != INVALID_NETWORK_ID) { 467 if (!requireKeyStore(mSelectedAccessPoint.getConfig())) { 468 mWifiManager.connect(mChannel, mSelectedAccessPoint.networkId, 469 mConnectListener); 470 } 471 } else if (mSelectedAccessPoint.security == AccessPoint.SECURITY_NONE) { 472 /** Bypass dialog for unsecured networks */ 473 mSelectedAccessPoint.generateOpenNetworkConfig(); 474 mWifiManager.connect(mChannel, mSelectedAccessPoint.getConfig(), 475 mConnectListener); 476 } else { 477 showDialog(mSelectedAccessPoint, true); 478 } 479 return true; 480 } 481 case MENU_ID_FORGET: { 482 mWifiManager.forget(mChannel, mSelectedAccessPoint.networkId, mForgetListener); 483 return true; 484 } 485 case MENU_ID_MODIFY: { 486 showDialog(mSelectedAccessPoint, true); 487 return true; 488 } 489 } 490 return super.onContextItemSelected(item); 491 } 492 493 @Override 494 public boolean onPreferenceTreeClick(PreferenceScreen screen, Preference preference) { 495 if (preference instanceof AccessPoint) { 496 mSelectedAccessPoint = (AccessPoint) preference; 497 /** Bypass dialog for unsecured, unsaved networks */ 498 if (mSelectedAccessPoint.security == AccessPoint.SECURITY_NONE && 499 mSelectedAccessPoint.networkId == INVALID_NETWORK_ID) { 500 mSelectedAccessPoint.generateOpenNetworkConfig(); 501 mWifiManager.connect(mChannel, mSelectedAccessPoint.getConfig(), mConnectListener); 502 } else { 503 showDialog(mSelectedAccessPoint, false); 504 } 505 } else { 506 return super.onPreferenceTreeClick(screen, preference); 507 } 508 return true; 509 } 510 511 private void showDialog(AccessPoint accessPoint, boolean edit) { 512 if (mDialog != null) { 513 removeDialog(WIFI_DIALOG_ID); 514 mDialog = null; 515 } 516 517 // Save the access point and edit mode 518 mDlgAccessPoint = accessPoint; 519 mDlgEdit = edit; 520 521 showDialog(WIFI_DIALOG_ID); 522 } 523 524 @Override 525 public Dialog onCreateDialog(int dialogId) { 526 switch (dialogId) { 527 case WIFI_DIALOG_ID: 528 AccessPoint ap = mDlgAccessPoint; // For manual launch 529 if (ap == null) { // For re-launch from saved state 530 if (mAccessPointSavedState != null) { 531 ap = new AccessPoint(getActivity(), mAccessPointSavedState); 532 // For repeated orientation changes 533 mDlgAccessPoint = ap; 534 } 535 } 536 // If it's still null, fine, it's for Add Network 537 mSelectedAccessPoint = ap; 538 mDialog = new WifiDialog(getActivity(), this, ap, mDlgEdit); 539 return mDialog; 540 case WPS_PBC_DIALOG_ID: 541 return new WpsDialog(getActivity(), WpsInfo.PBC); 542 case WPS_PIN_DIALOG_ID: 543 return new WpsDialog(getActivity(), WpsInfo.DISPLAY); 544 } 545 return super.onCreateDialog(dialogId); 546 } 547 548 private boolean requireKeyStore(WifiConfiguration config) { 549 if (WifiConfigController.requireKeyStore(config) && 550 KeyStore.getInstance().state() != KeyStore.State.UNLOCKED) { 551 mKeyStoreNetworkId = config.networkId; 552 Credentials.getInstance().unlock(getActivity()); 553 return true; 554 } 555 return false; 556 } 557 558 /** 559 * Shows the latest access points available with supplimental information like 560 * the strength of network and the security for it. 561 */ 562 private void updateAccessPoints() { 563 // Safeguard from some delayed event handling 564 if (getActivity() == null) return; 565 566 final int wifiState = mWifiManager.getWifiState(); 567 568 switch (wifiState) { 569 case WifiManager.WIFI_STATE_ENABLED: 570 // AccessPoints are automatically sorted with TreeSet. 571 final Collection<AccessPoint> accessPoints = constructAccessPoints(); 572 getPreferenceScreen().removeAll(); 573 if(accessPoints.size() == 0) { 574 addMessagePreference(R.string.wifi_empty_list_wifi_on); 575 } 576 for (AccessPoint accessPoint : accessPoints) { 577 getPreferenceScreen().addPreference(accessPoint); 578 } 579 break; 580 581 case WifiManager.WIFI_STATE_ENABLING: 582 getPreferenceScreen().removeAll(); 583 break; 584 585 case WifiManager.WIFI_STATE_DISABLING: 586 addMessagePreference(R.string.wifi_stopping); 587 break; 588 589 case WifiManager.WIFI_STATE_DISABLED: 590 addMessagePreference(R.string.wifi_empty_list_wifi_off); 591 break; 592 } 593 } 594 595 private void addMessagePreference(int messageId) { 596 if (mEmptyView != null) mEmptyView.setText(messageId); 597 getPreferenceScreen().removeAll(); 598 } 599 600 /** Returns sorted list of access points */ 601 private List<AccessPoint> constructAccessPoints() { 602 ArrayList<AccessPoint> accessPoints = new ArrayList<AccessPoint>(); 603 /** Lookup table to more quickly update AccessPoints by only considering objects with the 604 * correct SSID. Maps SSID -> List of AccessPoints with the given SSID. */ 605 Multimap<String, AccessPoint> apMap = new Multimap<String, AccessPoint>(); 606 607 final List<WifiConfiguration> configs = mWifiManager.getConfiguredNetworks(); 608 if (configs != null) { 609 for (WifiConfiguration config : configs) { 610 AccessPoint accessPoint = new AccessPoint(getActivity(), config); 611 accessPoint.update(mLastInfo, mLastState); 612 accessPoints.add(accessPoint); 613 apMap.put(accessPoint.ssid, accessPoint); 614 } 615 } 616 617 final List<ScanResult> results = mWifiManager.getScanResults(); 618 if (results != null) { 619 for (ScanResult result : results) { 620 // Ignore hidden and ad-hoc networks. 621 if (result.SSID == null || result.SSID.length() == 0 || 622 result.capabilities.contains("[IBSS]")) { 623 continue; 624 } 625 626 boolean found = false; 627 for (AccessPoint accessPoint : apMap.getAll(result.SSID)) { 628 if (accessPoint.update(result)) 629 found = true; 630 } 631 if (!found) { 632 AccessPoint accessPoint = new AccessPoint(getActivity(), result); 633 accessPoints.add(accessPoint); 634 apMap.put(accessPoint.ssid, accessPoint); 635 } 636 } 637 } 638 639 // Pre-sort accessPoints to speed preference insertion 640 Collections.sort(accessPoints); 641 return accessPoints; 642 } 643 644 /** A restricted multimap for use in constructAccessPoints */ 645 private class Multimap<K,V> { 646 private HashMap<K,List<V>> store = new HashMap<K,List<V>>(); 647 /** retrieve a non-null list of values with key K */ 648 List<V> getAll(K key) { 649 List<V> values = store.get(key); 650 return values != null ? values : Collections.<V>emptyList(); 651 } 652 653 void put(K key, V val) { 654 List<V> curVals = store.get(key); 655 if (curVals == null) { 656 curVals = new ArrayList<V>(3); 657 store.put(key, curVals); 658 } 659 curVals.add(val); 660 } 661 } 662 663 private void handleEvent(Context context, Intent intent) { 664 String action = intent.getAction(); 665 if (WifiManager.WIFI_STATE_CHANGED_ACTION.equals(action)) { 666 updateWifiState(intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, 667 WifiManager.WIFI_STATE_UNKNOWN)); 668 } else if (WifiManager.SCAN_RESULTS_AVAILABLE_ACTION.equals(action) || 669 WifiManager.CONFIGURED_NETWORKS_CHANGED_ACTION.equals(action) || 670 WifiManager.LINK_CONFIGURATION_CHANGED_ACTION.equals(action)) { 671 updateAccessPoints(); 672 } else if (WifiManager.SUPPLICANT_STATE_CHANGED_ACTION.equals(action)) { 673 //Ignore supplicant state changes when network is connected 674 //TODO: we should deprecate SUPPLICANT_STATE_CHANGED_ACTION and 675 //introduce a broadcast that combines the supplicant and network 676 //network state change events so the apps dont have to worry about 677 //ignoring supplicant state change when network is connected 678 //to get more fine grained information. 679 SupplicantState state = (SupplicantState) intent.getParcelableExtra( 680 WifiManager.EXTRA_NEW_STATE); 681 if (!mConnected.get() && SupplicantState.isHandshakeState(state)) { 682 updateConnectionState(WifiInfo.getDetailedStateOf(state)); 683 } 684 } else if (WifiManager.NETWORK_STATE_CHANGED_ACTION.equals(action)) { 685 NetworkInfo info = (NetworkInfo) intent.getParcelableExtra( 686 WifiManager.EXTRA_NETWORK_INFO); 687 mConnected.set(info.isConnected()); 688 changeNextButtonState(info.isConnected()); 689 updateAccessPoints(); 690 updateConnectionState(info.getDetailedState()); 691 if (mAutoFinishOnConnection && info.isConnected()) { 692 getActivity().finish(); 693 return; 694 } 695 } else if (WifiManager.RSSI_CHANGED_ACTION.equals(action)) { 696 updateConnectionState(null); 697 } 698 } 699 700 private void updateConnectionState(DetailedState state) { 701 /* sticky broadcasts can call this when wifi is disabled */ 702 if (!mWifiManager.isWifiEnabled()) { 703 mScanner.pause(); 704 return; 705 } 706 707 if (state == DetailedState.OBTAINING_IPADDR) { 708 mScanner.pause(); 709 } else { 710 mScanner.resume(); 711 } 712 713 mLastInfo = mWifiManager.getConnectionInfo(); 714 if (state != null) { 715 mLastState = state; 716 } 717 718 for (int i = getPreferenceScreen().getPreferenceCount() - 1; i >= 0; --i) { 719 // Maybe there's a WifiConfigPreference 720 Preference preference = getPreferenceScreen().getPreference(i); 721 if (preference instanceof AccessPoint) { 722 final AccessPoint accessPoint = (AccessPoint) preference; 723 accessPoint.update(mLastInfo, mLastState); 724 } 725 } 726 } 727 728 private void updateWifiState(int state) { 729 getActivity().invalidateOptionsMenu(); 730 731 switch (state) { 732 case WifiManager.WIFI_STATE_ENABLED: 733 mScanner.resume(); 734 return; // not break, to avoid the call to pause() below 735 736 case WifiManager.WIFI_STATE_ENABLING: 737 addMessagePreference(R.string.wifi_starting); 738 break; 739 740 case WifiManager.WIFI_STATE_DISABLED: 741 addMessagePreference(R.string.wifi_empty_list_wifi_off); 742 break; 743 } 744 745 mLastInfo = null; 746 mLastState = null; 747 mScanner.pause(); 748 } 749 750 private class Scanner extends Handler { 751 private int mRetry = 0; 752 753 void resume() { 754 if (!hasMessages(0)) { 755 sendEmptyMessage(0); 756 } 757 } 758 759 void forceScan() { 760 removeMessages(0); 761 sendEmptyMessage(0); 762 } 763 764 void pause() { 765 mRetry = 0; 766 removeMessages(0); 767 } 768 769 @Override 770 public void handleMessage(Message message) { 771 if (mWifiManager.startScanActive()) { 772 mRetry = 0; 773 } else if (++mRetry >= 3) { 774 mRetry = 0; 775 Toast.makeText(getActivity(), R.string.wifi_fail_to_scan, 776 Toast.LENGTH_LONG).show(); 777 return; 778 } 779 sendEmptyMessageDelayed(0, WIFI_RESCAN_INTERVAL_MS); 780 } 781 } 782 783 /** 784 * Renames/replaces "Next" button when appropriate. "Next" button usually exists in 785 * Wifi setup screens, not in usual wifi settings screen. 786 * 787 * @param connected true when the device is connected to a wifi network. 788 */ 789 private void changeNextButtonState(boolean connected) { 790 if (mEnableNextOnConnection && hasNextButton()) { 791 getNextButton().setEnabled(connected); 792 } 793 } 794 795 public void onClick(DialogInterface dialogInterface, int button) { 796 if (button == WifiDialog.BUTTON_FORGET && mSelectedAccessPoint != null) { 797 forget(); 798 } else if (button == WifiDialog.BUTTON_SUBMIT) { 799 submit(mDialog.getController()); 800 } 801 } 802 803 /* package */ void submit(WifiConfigController configController) { 804 805 final WifiConfiguration config = configController.getConfig(); 806 807 if (config == null) { 808 if (mSelectedAccessPoint != null 809 && !requireKeyStore(mSelectedAccessPoint.getConfig()) 810 && mSelectedAccessPoint.networkId != INVALID_NETWORK_ID) { 811 mWifiManager.connect(mChannel, mSelectedAccessPoint.networkId, 812 mConnectListener); 813 } 814 } else if (config.networkId != INVALID_NETWORK_ID) { 815 if (mSelectedAccessPoint != null) { 816 mWifiManager.save(mChannel, config, mSaveListener); 817 } 818 } else { 819 if (configController.isEdit() || requireKeyStore(config)) { 820 mWifiManager.save(mChannel, config, mSaveListener); 821 } else { 822 mWifiManager.connect(mChannel, config, mConnectListener); 823 } 824 } 825 826 if (mWifiManager.isWifiEnabled()) { 827 mScanner.resume(); 828 } 829 updateAccessPoints(); 830 } 831 832 /* package */ void forget() { 833 if (mSelectedAccessPoint.networkId == INVALID_NETWORK_ID) { 834 // Should not happen, but a monkey seems to triger it 835 Log.e(TAG, "Failed to forget invalid network " + mSelectedAccessPoint.getConfig()); 836 return; 837 } 838 839 mWifiManager.forget(mChannel, mSelectedAccessPoint.networkId, mForgetListener); 840 841 if (mWifiManager.isWifiEnabled()) { 842 mScanner.resume(); 843 } 844 updateAccessPoints(); 845 846 // We need to rename/replace "Next" button in wifi setup context. 847 changeNextButtonState(false); 848 } 849 850 /** 851 * Refreshes acccess points and ask Wifi module to scan networks again. 852 */ 853 /* package */ void refreshAccessPoints() { 854 if (mWifiManager.isWifiEnabled()) { 855 mScanner.resume(); 856 } 857 858 getPreferenceScreen().removeAll(); 859 } 860 861 /** 862 * Called when "add network" button is pressed. 863 */ 864 /* package */ void onAddNetworkPressed() { 865 // No exact access point is selected. 866 mSelectedAccessPoint = null; 867 showDialog(null, true); 868 } 869 870 /* package */ int getAccessPointsCount() { 871 final boolean wifiIsEnabled = mWifiManager.isWifiEnabled(); 872 if (wifiIsEnabled) { 873 return getPreferenceScreen().getPreferenceCount(); 874 } else { 875 return 0; 876 } 877 } 878 879 /** 880 * Requests wifi module to pause wifi scan. May be ignored when the module is disabled. 881 */ 882 /* package */ void pauseWifiScan() { 883 if (mWifiManager.isWifiEnabled()) { 884 mScanner.pause(); 885 } 886 } 887 888 /** 889 * Requests wifi module to resume wifi scan. May be ignored when the module is disabled. 890 */ 891 /* package */ void resumeWifiScan() { 892 if (mWifiManager.isWifiEnabled()) { 893 mScanner.resume(); 894 } 895 } 896 897 @Override 898 protected int getHelpResource() { 899 if (mSetupWizardMode) { 900 return 0; 901 } 902 return R.string.help_url_wifi; 903 } 904} 905