WifiSettings.java revision 41937766981423c9252e12e3319b2e7532739627 
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;
20import static android.os.UserManager.DISALLOW_CONFIG_WIFI;
21
22import com.android.settings.R;
23import com.android.settings.RestrictedSettingsFragment;
24import com.android.settings.SettingsActivity;
25import com.android.settings.search.BaseSearchIndexProvider;
26import com.android.settings.search.Indexable;
27import com.android.settings.search.SearchIndexableRaw;
28import com.android.settings.widget.SwitchBar;
29import com.android.settings.wifi.p2p.WifiP2pSettings;
30
31import android.app.ActionBar;
32import android.app.Activity;
33import android.app.AlertDialog;
34import android.app.Dialog;
35import android.content.BroadcastReceiver;
36import android.content.Context;
37import android.content.DialogInterface;
38import android.content.Intent;
39import android.content.IntentFilter;
40import android.content.pm.PackageManager;
41import android.content.res.Resources;
42import android.content.res.TypedArray;
43import android.location.LocationManager;
44import android.net.ConnectivityManager;
45import android.net.NetworkInfo;
46import android.net.NetworkInfo.DetailedState;
47import android.net.wifi.ScanResult;
48import android.net.wifi.SupplicantState;
49import android.net.wifi.WifiConfiguration;
50import android.net.wifi.WifiInfo;
51import android.net.wifi.WifiManager;
52import android.net.wifi.WpsInfo;
53import android.os.Bundle;
54import android.os.Handler;
55import android.os.Message;
56import android.preference.Preference;
57import android.preference.PreferenceScreen;
58import android.util.AttributeSet;
59import android.util.Log;
60import android.view.ContextMenu;
61import android.view.ContextMenu.ContextMenuInfo;
62import android.view.Gravity;
63import android.view.LayoutInflater;
64import android.view.Menu;
65import android.view.MenuInflater;
66import android.view.MenuItem;
67import android.view.View;
68import android.view.View.OnClickListener;
69import android.view.ViewGroup;
70import android.widget.AdapterView.AdapterContextMenuInfo;
71import android.widget.Button;
72import android.widget.ImageButton;
73import android.widget.PopupMenu;
74import android.widget.PopupMenu.OnMenuItemClickListener;
75import android.widget.RelativeLayout;
76import android.widget.Switch;
77import android.widget.TextView;
78import android.widget.Toast;
79
80import java.util.ArrayList;
81import java.util.Collection;
82import java.util.Collections;
83import java.util.HashMap;
84import java.util.List;
85import java.util.concurrent.atomic.AtomicBoolean;
86
87/**
88 * Two types of UI are provided here.
89 *
90 * The first is for "usual Settings", appearing as any other Setup fragment.
91 *
92 * The second is for Setup Wizard, with a simplified interface that hides the action bar
93 * and menus.
94 */
95public class WifiSettings extends RestrictedSettingsFragment
96        implements DialogInterface.OnClickListener, Indexable  {
97
98    private static final String TAG = "WifiSettings";
99    private static final int MENU_ID_WPS_PBC = Menu.FIRST;
100    private static final int MENU_ID_WPS_PIN = Menu.FIRST + 1;
101    private static final int MENU_ID_P2P = Menu.FIRST + 2;
102    private static final int MENU_ID_ADD_NETWORK = Menu.FIRST + 3;
103    private static final int MENU_ID_ADVANCED = Menu.FIRST + 4;
104    private static final int MENU_ID_SCAN = Menu.FIRST + 5;
105    private static final int MENU_ID_CONNECT = Menu.FIRST + 6;
106    private static final int MENU_ID_FORGET = Menu.FIRST + 7;
107    private static final int MENU_ID_MODIFY = Menu.FIRST + 8;
108    private static final int MENU_ID_WRITE_NFC = Menu.FIRST + 9;
109
110    private static final int WIFI_DIALOG_ID = 1;
111    private static final int WPS_PBC_DIALOG_ID = 2;
112    private static final int WPS_PIN_DIALOG_ID = 3;
113    private static final int WIFI_SKIPPED_DIALOG_ID = 4;
114    private static final int WIFI_AND_MOBILE_SKIPPED_DIALOG_ID = 5;
115    private static final int WRITE_NFC_DIALOG_ID = 6;
116
117    // Combo scans can take 5-6s to complete - set to 10s.
118    private static final int WIFI_RESCAN_INTERVAL_MS = 10 * 1000;
119
120    // Instance state keys
121    private static final String SAVE_DIALOG_EDIT_MODE = "edit_mode";
122    private static final String SAVE_DIALOG_ACCESS_POINT_STATE = "wifi_ap_state";
123
124    // Activity result when pressing the Skip button
125    private static final int RESULT_SKIP = Activity.RESULT_FIRST_USER;
126
127    private final IntentFilter mFilter;
128    private final BroadcastReceiver mReceiver;
129    private final Scanner mScanner;
130
131    private WifiManager mWifiManager;
132    private WifiManager.ActionListener mConnectListener;
133    private WifiManager.ActionListener mSaveListener;
134    private WifiManager.ActionListener mForgetListener;
135    private boolean mP2pSupported;
136
137    private WifiEnabler mWifiEnabler;
138    // An access point being editted is stored here.
139    private AccessPoint mSelectedAccessPoint;
140
141    private DetailedState mLastState;
142    private WifiInfo mLastInfo;
143
144    private final AtomicBoolean mConnected = new AtomicBoolean(false);
145
146    private WifiDialog mDialog;
147    private WriteWifiConfigToNfcDialog mWifiToNfcDialog;
148
149    private TextView mEmptyView;
150
151    /* Used in Wifi Setup context */
152
153    // this boolean extra specifies whether to disable the Next button when not connected
154    private static final String EXTRA_ENABLE_NEXT_ON_CONNECT = "wifi_enable_next_on_connect";
155
156    // this boolean extra specifies whether to auto finish when connection is established
157    private static final String EXTRA_AUTO_FINISH_ON_CONNECT = "wifi_auto_finish_on_connect";
158
159    // this boolean extra shows a custom button that we can control
160    protected static final String EXTRA_SHOW_CUSTOM_BUTTON = "wifi_show_custom_button";
161
162    // show a text regarding data charges when wifi connection is required during setup wizard
163    protected static final String EXTRA_SHOW_WIFI_REQUIRED_INFO = "wifi_show_wifi_required_info";
164
165    // this boolean extra is set if we are being invoked by the Setup Wizard
166    private static final String EXTRA_IS_FIRST_RUN = "firstRun";
167
168    // should Next button only be enabled when we have a connection?
169    private boolean mEnableNextOnConnection;
170
171    // should activity finish once we have a connection?
172    private boolean mAutoFinishOnConnection;
173
174    // Save the dialog details
175    private boolean mDlgEdit;
176    private AccessPoint mDlgAccessPoint;
177    private Bundle mAccessPointSavedState;
178
179    // the action bar uses a different set of controls for Setup Wizard
180    private boolean mSetupWizardMode;
181
182    private SwitchBar mSwitchBar;
183
184    /* End of "used in Wifi Setup context" */
185
186    public WifiSettings() {
187        super(DISALLOW_CONFIG_WIFI);
188        mFilter = new IntentFilter();
189        mFilter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION);
190        mFilter.addAction(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION);
191        mFilter.addAction(WifiManager.NETWORK_IDS_CHANGED_ACTION);
192        mFilter.addAction(WifiManager.SUPPLICANT_STATE_CHANGED_ACTION);
193        mFilter.addAction(WifiManager.CONFIGURED_NETWORKS_CHANGED_ACTION);
194        mFilter.addAction(WifiManager.LINK_CONFIGURATION_CHANGED_ACTION);
195        mFilter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION);
196        mFilter.addAction(WifiManager.RSSI_CHANGED_ACTION);
197
198        mReceiver = new BroadcastReceiver() {
199            @Override
200            public void onReceive(Context context, Intent intent) {
201                handleEvent(context, intent);
202            }
203        };
204
205        mScanner = new Scanner();
206    }
207
208    @Override
209    public void onCreate(Bundle icicle) {
210        // Set this flag early, as it's needed by getHelpResource(), which is called by super
211        mSetupWizardMode = getActivity().getIntent().getBooleanExtra(EXTRA_IS_FIRST_RUN, false);
212        super.onCreate(icicle);
213    }
214
215    @Override
216    public View onCreateView(final LayoutInflater inflater, ViewGroup container,
217            Bundle savedInstanceState) {
218
219        if (mSetupWizardMode) {
220            View view = inflater.inflate(R.layout.setup_preference, container, false);
221            View other = view.findViewById(R.id.other_network);
222            other.setOnClickListener(new OnClickListener() {
223                @Override
224                public void onClick(View v) {
225                    if (mWifiManager.isWifiEnabled()) {
226                        onAddNetworkPressed();
227                    }
228                }
229            });
230            final ImageButton b = (ImageButton) view.findViewById(R.id.more);
231            if (b != null) {
232                b.setOnClickListener(new OnClickListener() {
233                    @Override
234                    public void onClick(View v) {
235                        if (mWifiManager.isWifiEnabled()) {
236                            PopupMenu pm = new PopupMenu(inflater.getContext(), b);
237                            pm.inflate(R.menu.wifi_setup);
238                            pm.setOnMenuItemClickListener(new OnMenuItemClickListener() {
239                                @Override
240                                public boolean onMenuItemClick(MenuItem item) {
241                                    if (R.id.wifi_wps == item.getItemId()) {
242                                        showDialog(WPS_PBC_DIALOG_ID);
243                                        return true;
244                                    }
245                                    return false;
246                                }
247                            });
248                            pm.show();
249                        }
250                    }
251                });
252            }
253
254            Intent intent = getActivity().getIntent();
255            if (intent.getBooleanExtra(EXTRA_SHOW_CUSTOM_BUTTON, false)) {
256                view.findViewById(R.id.button_bar).setVisibility(View.VISIBLE);
257                view.findViewById(R.id.back_button).setVisibility(View.INVISIBLE);
258                view.findViewById(R.id.skip_button).setVisibility(View.INVISIBLE);
259                view.findViewById(R.id.next_button).setVisibility(View.INVISIBLE);
260
261                Button customButton = (Button) view.findViewById(R.id.custom_button);
262                customButton.setVisibility(View.VISIBLE);
263                customButton.setOnClickListener(new OnClickListener() {
264                    @Override
265                    public void onClick(View v) {
266                        boolean isConnected = false;
267                        Activity activity = getActivity();
268                        final ConnectivityManager connectivity = (ConnectivityManager)
269                                activity.getSystemService(Context.CONNECTIVITY_SERVICE);
270                        if (connectivity != null) {
271                            final NetworkInfo info = connectivity.getActiveNetworkInfo();
272                            isConnected = (info != null) && info.isConnected();
273                        }
274                        if (isConnected) {
275                            // Warn of possible data charges
276                            showDialog(WIFI_SKIPPED_DIALOG_ID);
277                        } else {
278                            // Warn of lack of updates
279                            showDialog(WIFI_AND_MOBILE_SKIPPED_DIALOG_ID);
280                        }
281                    }
282                });
283            }
284
285            if (intent.getBooleanExtra(EXTRA_SHOW_WIFI_REQUIRED_INFO, false)) {
286                view.findViewById(R.id.wifi_required_info).setVisibility(View.VISIBLE);
287            }
288
289            return view;
290        } else {
291            return super.onCreateView(inflater, container, savedInstanceState);
292        }
293    }
294
295    @Override
296    public void onActivityCreated(Bundle savedInstanceState) {
297        super.onActivityCreated(savedInstanceState);
298
299        mP2pSupported = getPackageManager().hasSystemFeature(PackageManager.FEATURE_WIFI_DIRECT);
300        mWifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
301
302        mConnectListener = new WifiManager.ActionListener() {
303                                   @Override
304                                   public void onSuccess() {
305                                   }
306                                   @Override
307                                   public void onFailure(int reason) {
308                                       Activity activity = getActivity();
309                                       if (activity != null) {
310                                           Toast.makeText(activity,
311                                                R.string.wifi_failed_connect_message,
312                                                Toast.LENGTH_SHORT).show();
313                                       }
314                                   }
315                               };
316
317        mSaveListener = new WifiManager.ActionListener() {
318                                @Override
319                                public void onSuccess() {
320                                }
321                                @Override
322                                public void onFailure(int reason) {
323                                    Activity activity = getActivity();
324                                    if (activity != null) {
325                                        Toast.makeText(activity,
326                                            R.string.wifi_failed_save_message,
327                                            Toast.LENGTH_SHORT).show();
328                                    }
329                                }
330                            };
331
332        mForgetListener = new WifiManager.ActionListener() {
333                                   @Override
334                                   public void onSuccess() {
335                                   }
336                                   @Override
337                                   public void onFailure(int reason) {
338                                       Activity activity = getActivity();
339                                       if (activity != null) {
340                                           Toast.makeText(activity,
341                                               R.string.wifi_failed_forget_message,
342                                               Toast.LENGTH_SHORT).show();
343                                       }
344                                   }
345                               };
346
347        if (savedInstanceState != null
348                && savedInstanceState.containsKey(SAVE_DIALOG_ACCESS_POINT_STATE)) {
349            mDlgEdit = savedInstanceState.getBoolean(SAVE_DIALOG_EDIT_MODE);
350            mAccessPointSavedState = savedInstanceState.getBundle(SAVE_DIALOG_ACCESS_POINT_STATE);
351        }
352
353        final Activity activity = getActivity();
354        final Intent intent = activity.getIntent();
355
356        // first if we're supposed to finish once we have a connection
357        mAutoFinishOnConnection = intent.getBooleanExtra(EXTRA_AUTO_FINISH_ON_CONNECT, false);
358
359        if (mAutoFinishOnConnection) {
360            // Hide the next button
361            if (hasNextButton()) {
362                getNextButton().setVisibility(View.GONE);
363            }
364
365            final ConnectivityManager connectivity = (ConnectivityManager)
366                    activity.getSystemService(Context.CONNECTIVITY_SERVICE);
367            if (connectivity != null
368                    && connectivity.getNetworkInfo(ConnectivityManager.TYPE_WIFI).isConnected()) {
369                activity.setResult(Activity.RESULT_OK);
370                activity.finish();
371                return;
372            }
373        }
374
375        // if we're supposed to enable/disable the Next button based on our current connection
376        // state, start it off in the right state
377        mEnableNextOnConnection = intent.getBooleanExtra(EXTRA_ENABLE_NEXT_ON_CONNECT, false);
378
379        if (mEnableNextOnConnection) {
380            if (hasNextButton()) {
381                final ConnectivityManager connectivity = (ConnectivityManager)
382                        activity.getSystemService(Context.CONNECTIVITY_SERVICE);
383                if (connectivity != null) {
384                    NetworkInfo info = connectivity.getNetworkInfo(
385                            ConnectivityManager.TYPE_WIFI);
386                    changeNextButtonState(info.isConnected());
387                }
388            }
389        }
390
391        addPreferencesFromResource(R.xml.wifi_settings);
392
393        if (mSetupWizardMode) {
394            getView().setSystemUiVisibility(
395                    View.STATUS_BAR_DISABLE_HOME |
396                    View.STATUS_BAR_DISABLE_RECENT |
397                    View.STATUS_BAR_DISABLE_NOTIFICATION_ALERTS |
398                    View.STATUS_BAR_DISABLE_CLOCK);
399        }
400
401        mEmptyView = (TextView) getView().findViewById(android.R.id.empty);
402        getListView().setEmptyView(mEmptyView);
403
404        if (!mSetupWizardMode) {
405            registerForContextMenu(getListView());
406        }
407        setHasOptionsMenu(true);
408    }
409
410    @Override
411    public void onStart() {
412        super.onStart();
413
414        // On/off switch is hidden for Setup Wizard
415        if (!mSetupWizardMode) {
416            final SettingsActivity activity = (SettingsActivity) getActivity();
417
418            mSwitchBar = activity.getSwitchBar();
419            mWifiEnabler = new WifiEnabler(activity, mSwitchBar);
420        }
421    }
422
423    @Override
424    public void onResume() {
425        final Activity activity = getActivity();
426        super.onResume();
427        if (mWifiEnabler != null) {
428            mWifiEnabler.resume(activity);
429        }
430
431        activity.registerReceiver(mReceiver, mFilter);
432        updateAccessPoints();
433    }
434
435    @Override
436    public void onPause() {
437        super.onPause();
438        if (mWifiEnabler != null) {
439            mWifiEnabler.pause();
440        }
441
442        getActivity().unregisterReceiver(mReceiver);
443        mScanner.pause();
444    }
445
446    @Override
447    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
448        // If the user is not allowed to configure wifi, do not show the menu.
449        if (isRestrictedAndNotPinProtected()) return;
450
451        final boolean wifiIsEnabled = mWifiManager.isWifiEnabled();
452        TypedArray ta = getActivity().getTheme().obtainStyledAttributes(
453                new int[] {R.attr.ic_menu_add, R.attr.ic_wps});
454        if (mSetupWizardMode) {
455            menu.add(Menu.NONE, MENU_ID_WPS_PBC, 0, R.string.wifi_menu_wps_pbc)
456                    .setIcon(ta.getDrawable(1))
457                    .setEnabled(wifiIsEnabled)
458                    .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
459            menu.add(Menu.NONE, MENU_ID_ADD_NETWORK, 0, R.string.wifi_add_network)
460                    .setEnabled(wifiIsEnabled)
461                    .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
462        } else {
463            menu.add(Menu.NONE, MENU_ID_WPS_PBC, 0, R.string.wifi_menu_wps_pbc)
464                    .setIcon(ta.getDrawable(1))
465                    .setEnabled(wifiIsEnabled)
466                    .setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
467            menu.add(Menu.NONE, MENU_ID_ADD_NETWORK, 0, R.string.wifi_add_network)
468                    .setIcon(ta.getDrawable(0))
469                    .setEnabled(wifiIsEnabled)
470                    .setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
471            menu.add(Menu.NONE, MENU_ID_SCAN, 0, R.string.wifi_menu_scan)
472                    //.setIcon(R.drawable.ic_menu_scan_network)
473                    .setEnabled(wifiIsEnabled)
474                    .setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
475            menu.add(Menu.NONE, MENU_ID_WPS_PIN, 0, R.string.wifi_menu_wps_pin)
476                    .setEnabled(wifiIsEnabled)
477                    .setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
478            if (mP2pSupported) {
479                menu.add(Menu.NONE, MENU_ID_P2P, 0, R.string.wifi_menu_p2p)
480                        .setEnabled(wifiIsEnabled)
481                        .setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
482            }
483            menu.add(Menu.NONE, MENU_ID_ADVANCED, 0, R.string.wifi_menu_advanced)
484                    //.setIcon(android.R.drawable.ic_menu_manage)
485                    .setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
486        }
487        ta.recycle();
488        super.onCreateOptionsMenu(menu, inflater);
489    }
490
491    @Override
492    public void onSaveInstanceState(Bundle outState) {
493        super.onSaveInstanceState(outState);
494
495        // If the dialog is showing, save its state.
496        if (mDialog != null && mDialog.isShowing()) {
497            outState.putBoolean(SAVE_DIALOG_EDIT_MODE, mDlgEdit);
498            if (mDlgAccessPoint != null) {
499                mAccessPointSavedState = new Bundle();
500                mDlgAccessPoint.saveWifiState(mAccessPointSavedState);
501                outState.putBundle(SAVE_DIALOG_ACCESS_POINT_STATE, mAccessPointSavedState);
502            }
503        }
504    }
505
506    @Override
507    public boolean onOptionsItemSelected(MenuItem item) {
508        // If the user is not allowed to configure wifi, do not handle menu selections.
509        if (isRestrictedAndNotPinProtected()) return false;
510
511        switch (item.getItemId()) {
512            case MENU_ID_WPS_PBC:
513                showDialog(WPS_PBC_DIALOG_ID);
514                return true;
515            case MENU_ID_P2P:
516                if (getActivity() instanceof SettingsActivity) {
517                    ((SettingsActivity) getActivity()).startPreferencePanel(
518                            WifiP2pSettings.class.getCanonicalName(),
519                            null,
520                            R.string.wifi_p2p_settings_title, null,
521                            this, 0);
522                } else {
523                    startFragment(this, WifiP2pSettings.class.getCanonicalName(), -1, null);
524                }
525                return true;
526            case MENU_ID_WPS_PIN:
527                showDialog(WPS_PIN_DIALOG_ID);
528                return true;
529            case MENU_ID_SCAN:
530                if (mWifiManager.isWifiEnabled()) {
531                    mScanner.forceScan();
532                }
533                return true;
534            case MENU_ID_ADD_NETWORK:
535                if (mWifiManager.isWifiEnabled()) {
536                    onAddNetworkPressed();
537                }
538                return true;
539            case MENU_ID_ADVANCED:
540                if (getActivity() instanceof SettingsActivity) {
541                    ((SettingsActivity) getActivity()).startPreferencePanel(
542                            AdvancedWifiSettings.class.getCanonicalName(),
543                            null,
544                            R.string.wifi_advanced_titlebar, null,
545                            this, 0);
546                } else {
547                    startFragment(this, AdvancedWifiSettings.class.getCanonicalName(), -1, null);
548                }
549                return true;
550        }
551        return super.onOptionsItemSelected(item);
552    }
553
554    @Override
555    public void onCreateContextMenu(ContextMenu menu, View view, ContextMenuInfo info) {
556        if (info instanceof AdapterContextMenuInfo) {
557            Preference preference = (Preference) getListView().getItemAtPosition(
558                    ((AdapterContextMenuInfo) info).position);
559
560            if (preference instanceof AccessPoint) {
561                mSelectedAccessPoint = (AccessPoint) preference;
562                menu.setHeaderTitle(mSelectedAccessPoint.ssid);
563                if (mSelectedAccessPoint.getLevel() != -1
564                        && mSelectedAccessPoint.getState() == null) {
565                    menu.add(Menu.NONE, MENU_ID_CONNECT, 0, R.string.wifi_menu_connect);
566                }
567                if (mSelectedAccessPoint.networkId != INVALID_NETWORK_ID) {
568                    menu.add(Menu.NONE, MENU_ID_FORGET, 0, R.string.wifi_menu_forget);
569                    menu.add(Menu.NONE, MENU_ID_MODIFY, 0, R.string.wifi_menu_modify);
570
571                    if (mSelectedAccessPoint.security != AccessPoint.SECURITY_NONE) {
572                        // Only allow writing of NFC tags for password-protected networks.
573                        menu.add(Menu.NONE, MENU_ID_WRITE_NFC, 0, "Write to NFC Tag");
574                    }
575                }
576            }
577        }
578    }
579
580    @Override
581    public boolean onContextItemSelected(MenuItem item) {
582        if (mSelectedAccessPoint == null) {
583            return super.onContextItemSelected(item);
584        }
585        switch (item.getItemId()) {
586            case MENU_ID_CONNECT: {
587                if (mSelectedAccessPoint.networkId != INVALID_NETWORK_ID) {
588                    mWifiManager.connect(mSelectedAccessPoint.networkId,
589                            mConnectListener);
590                } else if (mSelectedAccessPoint.security == AccessPoint.SECURITY_NONE) {
591                    /** Bypass dialog for unsecured networks */
592                    mSelectedAccessPoint.generateOpenNetworkConfig();
593                    mWifiManager.connect(mSelectedAccessPoint.getConfig(),
594                            mConnectListener);
595                } else {
596                    showDialog(mSelectedAccessPoint, true);
597                }
598                return true;
599            }
600            case MENU_ID_FORGET: {
601                mWifiManager.forget(mSelectedAccessPoint.networkId, mForgetListener);
602                return true;
603            }
604            case MENU_ID_MODIFY: {
605                showDialog(mSelectedAccessPoint, true);
606                return true;
607            }
608            case MENU_ID_WRITE_NFC:
609                showDialog(WRITE_NFC_DIALOG_ID);
610                return true;
611
612        }
613        return super.onContextItemSelected(item);
614    }
615
616    @Override
617    public boolean onPreferenceTreeClick(PreferenceScreen screen, Preference preference) {
618        if (preference instanceof AccessPoint) {
619            mSelectedAccessPoint = (AccessPoint) preference;
620            /** Bypass dialog for unsecured, unsaved networks */
621            if (mSelectedAccessPoint.security == AccessPoint.SECURITY_NONE &&
622                    mSelectedAccessPoint.networkId == INVALID_NETWORK_ID) {
623                mSelectedAccessPoint.generateOpenNetworkConfig();
624                mWifiManager.connect(mSelectedAccessPoint.getConfig(), mConnectListener);
625            } else {
626                showDialog(mSelectedAccessPoint, false);
627            }
628        } else {
629            return super.onPreferenceTreeClick(screen, preference);
630        }
631        return true;
632    }
633
634    private void showDialog(AccessPoint accessPoint, boolean edit) {
635        if (mDialog != null) {
636            removeDialog(WIFI_DIALOG_ID);
637            mDialog = null;
638        }
639
640        // Save the access point and edit mode
641        mDlgAccessPoint = accessPoint;
642        mDlgEdit = edit;
643
644        showDialog(WIFI_DIALOG_ID);
645    }
646
647    @Override
648    public Dialog onCreateDialog(int dialogId) {
649        switch (dialogId) {
650            case WIFI_DIALOG_ID:
651                AccessPoint ap = mDlgAccessPoint; // For manual launch
652                if (ap == null) { // For re-launch from saved state
653                    if (mAccessPointSavedState != null) {
654                        ap = new AccessPoint(getActivity(), mAccessPointSavedState);
655                        // For repeated orientation changes
656                        mDlgAccessPoint = ap;
657                        // Reset the saved access point data
658                        mAccessPointSavedState = null;
659                    }
660                }
661                // If it's null, fine, it's for Add Network
662                mSelectedAccessPoint = ap;
663                mDialog = new WifiDialog(getActivity(), this, ap, mDlgEdit);
664                return mDialog;
665            case WPS_PBC_DIALOG_ID:
666                return new WpsDialog(getActivity(), WpsInfo.PBC);
667            case WPS_PIN_DIALOG_ID:
668                return new WpsDialog(getActivity(), WpsInfo.DISPLAY);
669            case WIFI_SKIPPED_DIALOG_ID:
670                return new AlertDialog.Builder(getActivity())
671                            .setMessage(R.string.wifi_skipped_message)
672                            .setCancelable(false)
673                            .setNegativeButton(R.string.wifi_skip_anyway,
674                                    new DialogInterface.OnClickListener() {
675                                @Override
676                                public void onClick(DialogInterface dialog, int id) {
677                                    getActivity().setResult(RESULT_SKIP);
678                                    getActivity().finish();
679                                }
680                            })
681                            .setPositiveButton(R.string.wifi_dont_skip,
682                                    new DialogInterface.OnClickListener() {
683                                @Override
684                                public void onClick(DialogInterface dialog, int id) {
685                                }
686                            })
687                            .create();
688            case WIFI_AND_MOBILE_SKIPPED_DIALOG_ID:
689                return new AlertDialog.Builder(getActivity())
690                            .setMessage(R.string.wifi_and_mobile_skipped_message)
691                            .setCancelable(false)
692                            .setNegativeButton(R.string.wifi_skip_anyway,
693                                    new DialogInterface.OnClickListener() {
694                                @Override
695                                public void onClick(DialogInterface dialog, int id) {
696                                    getActivity().setResult(RESULT_SKIP);
697                                    getActivity().finish();
698                                }
699                            })
700                            .setPositiveButton(R.string.wifi_dont_skip,
701                                    new DialogInterface.OnClickListener() {
702                                @Override
703                                public void onClick(DialogInterface dialog, int id) {
704                                }
705                            })
706                            .create();
707            case WRITE_NFC_DIALOG_ID:
708                mWifiToNfcDialog =new WriteWifiConfigToNfcDialog(
709                        getActivity(), mSelectedAccessPoint, mWifiManager);
710                return mWifiToNfcDialog;
711
712        }
713        return super.onCreateDialog(dialogId);
714    }
715
716    /**
717     * Shows the latest access points available with supplimental information like
718     * the strength of network and the security for it.
719     */
720    private void updateAccessPoints() {
721        // Safeguard from some delayed event handling
722        if (getActivity() == null) return;
723
724        if (isRestrictedAndNotPinProtected()) {
725            addMessagePreference(R.string.wifi_empty_list_user_restricted);
726            return;
727        }
728        final int wifiState = mWifiManager.getWifiState();
729
730        switch (wifiState) {
731            case WifiManager.WIFI_STATE_ENABLED:
732                // AccessPoints are automatically sorted with TreeSet.
733                final Collection<AccessPoint> accessPoints =
734                        constructAccessPoints(getActivity(), mWifiManager, mLastInfo, mLastState);
735                getPreferenceScreen().removeAll();
736                if(accessPoints.size() == 0) {
737                    addMessagePreference(R.string.wifi_empty_list_wifi_on);
738                }
739                for (AccessPoint accessPoint : accessPoints) {
740                    getPreferenceScreen().addPreference(accessPoint);
741                }
742                break;
743
744            case WifiManager.WIFI_STATE_ENABLING:
745                getPreferenceScreen().removeAll();
746                break;
747
748            case WifiManager.WIFI_STATE_DISABLING:
749                addMessagePreference(R.string.wifi_stopping);
750                break;
751
752            case WifiManager.WIFI_STATE_DISABLED:
753                setOffMessage();
754                break;
755        }
756    }
757
758    private void setOffMessage() {
759        if (mEmptyView != null) {
760            mEmptyView.setText(R.string.wifi_empty_list_wifi_off);
761            if (android.provider.Settings.Global.getInt(getActivity().getContentResolver(),
762                    android.provider.Settings.Global.WIFI_SCAN_ALWAYS_AVAILABLE, 0) == 1) {
763                mEmptyView.append("\n\n");
764                int resId;
765                if (android.provider.Settings.Secure.isLocationProviderEnabled(
766                        getActivity().getContentResolver(), LocationManager.NETWORK_PROVIDER)) {
767                    resId = R.string.wifi_scan_notify_text_location_on;
768                } else {
769                    resId = R.string.wifi_scan_notify_text_location_off;
770                }
771                CharSequence charSeq = getText(resId);
772                mEmptyView.append(charSeq);
773            }
774        }
775        getPreferenceScreen().removeAll();
776    }
777
778    private void addMessagePreference(int messageId) {
779        if (mEmptyView != null) mEmptyView.setText(messageId);
780        getPreferenceScreen().removeAll();
781    }
782
783    /** Returns sorted list of access points */
784    private static List<AccessPoint> constructAccessPoints(Context context,
785            WifiManager wifiManager, WifiInfo lastInfo, DetailedState lastState) {
786        ArrayList<AccessPoint> accessPoints = new ArrayList<AccessPoint>();
787        /** Lookup table to more quickly update AccessPoints by only considering objects with the
788         * correct SSID.  Maps SSID -> List of AccessPoints with the given SSID.  */
789        Multimap<String, AccessPoint> apMap = new Multimap<String, AccessPoint>();
790
791        final List<WifiConfiguration> configs = wifiManager.getConfiguredNetworks();
792        if (configs != null) {
793            for (WifiConfiguration config : configs) {
794                AccessPoint accessPoint = new AccessPoint(context, config);
795                if (lastInfo != null && lastState != null) {
796                    accessPoint.update(lastInfo, lastState);
797                }
798                accessPoints.add(accessPoint);
799                apMap.put(accessPoint.ssid, accessPoint);
800            }
801        }
802
803        final List<ScanResult> results = wifiManager.getScanResults();
804        if (results != null) {
805            for (ScanResult result : results) {
806                // Ignore hidden and ad-hoc networks.
807                if (result.SSID == null || result.SSID.length() == 0 ||
808                        result.capabilities.contains("[IBSS]")) {
809                    continue;
810                }
811
812                boolean found = false;
813                for (AccessPoint accessPoint : apMap.getAll(result.SSID)) {
814                    if (accessPoint.update(result))
815                        found = true;
816                }
817                if (!found) {
818                    AccessPoint accessPoint = new AccessPoint(context, result);
819                    accessPoints.add(accessPoint);
820                    apMap.put(accessPoint.ssid, accessPoint);
821                }
822            }
823        }
824
825        // Pre-sort accessPoints to speed preference insertion
826        Collections.sort(accessPoints);
827        return accessPoints;
828    }
829
830    /** A restricted multimap for use in constructAccessPoints */
831    private static class Multimap<K,V> {
832        private final HashMap<K,List<V>> store = new HashMap<K,List<V>>();
833        /** retrieve a non-null list of values with key K */
834        List<V> getAll(K key) {
835            List<V> values = store.get(key);
836            return values != null ? values : Collections.<V>emptyList();
837        }
838
839        void put(K key, V val) {
840            List<V> curVals = store.get(key);
841            if (curVals == null) {
842                curVals = new ArrayList<V>(3);
843                store.put(key, curVals);
844            }
845            curVals.add(val);
846        }
847    }
848
849    private void handleEvent(Context context, Intent intent) {
850        String action = intent.getAction();
851        if (WifiManager.WIFI_STATE_CHANGED_ACTION.equals(action)) {
852            updateWifiState(intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE,
853                    WifiManager.WIFI_STATE_UNKNOWN));
854        } else if (WifiManager.SCAN_RESULTS_AVAILABLE_ACTION.equals(action) ||
855                WifiManager.CONFIGURED_NETWORKS_CHANGED_ACTION.equals(action) ||
856                WifiManager.LINK_CONFIGURATION_CHANGED_ACTION.equals(action)) {
857                updateAccessPoints();
858        } else if (WifiManager.SUPPLICANT_STATE_CHANGED_ACTION.equals(action)) {
859            //Ignore supplicant state changes when network is connected
860            //TODO: we should deprecate SUPPLICANT_STATE_CHANGED_ACTION and
861            //introduce a broadcast that combines the supplicant and network
862            //network state change events so the apps dont have to worry about
863            //ignoring supplicant state change when network is connected
864            //to get more fine grained information.
865            SupplicantState state = (SupplicantState) intent.getParcelableExtra(
866                    WifiManager.EXTRA_NEW_STATE);
867            if (!mConnected.get() && SupplicantState.isHandshakeState(state)) {
868                updateConnectionState(WifiInfo.getDetailedStateOf(state));
869             } else {
870                 // During a connect, we may have the supplicant
871                 // state change affect the detailed network state.
872                 // Make sure a lost connection is updated as well.
873                 updateConnectionState(null);
874             }
875        } else if (WifiManager.NETWORK_STATE_CHANGED_ACTION.equals(action)) {
876            NetworkInfo info = (NetworkInfo) intent.getParcelableExtra(
877                    WifiManager.EXTRA_NETWORK_INFO);
878            mConnected.set(info.isConnected());
879            changeNextButtonState(info.isConnected());
880            updateAccessPoints();
881            updateConnectionState(info.getDetailedState());
882            if (mAutoFinishOnConnection && info.isConnected()) {
883                Activity activity = getActivity();
884                if (activity != null) {
885                    activity.setResult(Activity.RESULT_OK);
886                    activity.finish();
887                }
888                return;
889            }
890        } else if (WifiManager.RSSI_CHANGED_ACTION.equals(action)) {
891            updateConnectionState(null);
892        }
893    }
894
895    private void updateConnectionState(DetailedState state) {
896        /* sticky broadcasts can call this when wifi is disabled */
897        if (!mWifiManager.isWifiEnabled()) {
898            mScanner.pause();
899            return;
900        }
901
902        if (state == DetailedState.OBTAINING_IPADDR) {
903            mScanner.pause();
904        } else {
905            mScanner.resume();
906        }
907
908        mLastInfo = mWifiManager.getConnectionInfo();
909        if (state != null) {
910            mLastState = state;
911        }
912
913        for (int i = getPreferenceScreen().getPreferenceCount() - 1; i >= 0; --i) {
914            // Maybe there's a WifiConfigPreference
915            Preference preference = getPreferenceScreen().getPreference(i);
916            if (preference instanceof AccessPoint) {
917                final AccessPoint accessPoint = (AccessPoint) preference;
918                accessPoint.update(mLastInfo, mLastState);
919            }
920        }
921    }
922
923    private void updateWifiState(int state) {
924        Activity activity = getActivity();
925        if (activity != null) {
926            activity.invalidateOptionsMenu();
927        }
928
929        switch (state) {
930            case WifiManager.WIFI_STATE_ENABLED:
931                mScanner.resume();
932                return; // not break, to avoid the call to pause() below
933
934            case WifiManager.WIFI_STATE_ENABLING:
935                addMessagePreference(R.string.wifi_starting);
936                break;
937
938            case WifiManager.WIFI_STATE_DISABLED:
939                setOffMessage();
940                break;
941        }
942
943        mLastInfo = null;
944        mLastState = null;
945        mScanner.pause();
946    }
947
948    private class Scanner extends Handler {
949        private int mRetry = 0;
950
951        void resume() {
952            if (!hasMessages(0)) {
953                sendEmptyMessage(0);
954            }
955        }
956
957        void forceScan() {
958            removeMessages(0);
959            sendEmptyMessage(0);
960        }
961
962        void pause() {
963            mRetry = 0;
964            removeMessages(0);
965        }
966
967        @Override
968        public void handleMessage(Message message) {
969            if (mWifiManager.startScan()) {
970                mRetry = 0;
971            } else if (++mRetry >= 3) {
972                mRetry = 0;
973                Activity activity = getActivity();
974                if (activity != null) {
975                    Toast.makeText(activity, R.string.wifi_fail_to_scan, Toast.LENGTH_LONG).show();
976                }
977                return;
978            }
979            sendEmptyMessageDelayed(0, WIFI_RESCAN_INTERVAL_MS);
980        }
981    }
982
983    /**
984     * Renames/replaces "Next" button when appropriate. "Next" button usually exists in
985     * Wifi setup screens, not in usual wifi settings screen.
986     *
987     * @param connected true when the device is connected to a wifi network.
988     */
989    private void changeNextButtonState(boolean connected) {
990        if (mEnableNextOnConnection && hasNextButton()) {
991            getNextButton().setEnabled(connected);
992        }
993    }
994
995    @Override
996    public void onClick(DialogInterface dialogInterface, int button) {
997        if (button == WifiDialog.BUTTON_FORGET && mSelectedAccessPoint != null) {
998            forget();
999        } else if (button == WifiDialog.BUTTON_SUBMIT) {
1000            if (mDialog != null) {
1001                submit(mDialog.getController());
1002            }
1003        }
1004    }
1005
1006    /* package */ void submit(WifiConfigController configController) {
1007
1008        final WifiConfiguration config = configController.getConfig();
1009
1010        if (config == null) {
1011            if (mSelectedAccessPoint != null
1012                    && mSelectedAccessPoint.networkId != INVALID_NETWORK_ID) {
1013                mWifiManager.connect(mSelectedAccessPoint.networkId,
1014                        mConnectListener);
1015            }
1016        } else if (config.networkId != INVALID_NETWORK_ID) {
1017            if (mSelectedAccessPoint != null) {
1018                mWifiManager.save(config, mSaveListener);
1019            }
1020        } else {
1021            if (configController.isEdit()) {
1022                mWifiManager.save(config, mSaveListener);
1023            } else {
1024                mWifiManager.connect(config, mConnectListener);
1025            }
1026        }
1027
1028        if (mWifiManager.isWifiEnabled()) {
1029            mScanner.resume();
1030        }
1031        updateAccessPoints();
1032    }
1033
1034    /* package */ void forget() {
1035        if (mSelectedAccessPoint.networkId == INVALID_NETWORK_ID) {
1036            // Should not happen, but a monkey seems to triger it
1037            Log.e(TAG, "Failed to forget invalid network " + mSelectedAccessPoint.getConfig());
1038            return;
1039        }
1040
1041        mWifiManager.forget(mSelectedAccessPoint.networkId, mForgetListener);
1042
1043        if (mWifiManager.isWifiEnabled()) {
1044            mScanner.resume();
1045        }
1046        updateAccessPoints();
1047
1048        // We need to rename/replace "Next" button in wifi setup context.
1049        changeNextButtonState(false);
1050    }
1051
1052    /**
1053     * Refreshes acccess points and ask Wifi module to scan networks again.
1054     */
1055    /* package */ void refreshAccessPoints() {
1056        if (mWifiManager.isWifiEnabled()) {
1057            mScanner.resume();
1058        }
1059
1060        getPreferenceScreen().removeAll();
1061    }
1062
1063    /**
1064     * Called when "add network" button is pressed.
1065     */
1066    /* package */ void onAddNetworkPressed() {
1067        // No exact access point is selected.
1068        mSelectedAccessPoint = null;
1069        showDialog(null, true);
1070    }
1071
1072    /* package */ int getAccessPointsCount() {
1073        final boolean wifiIsEnabled = mWifiManager.isWifiEnabled();
1074        if (wifiIsEnabled) {
1075            return getPreferenceScreen().getPreferenceCount();
1076        } else {
1077            return 0;
1078        }
1079    }
1080
1081    /**
1082     * Requests wifi module to pause wifi scan. May be ignored when the module is disabled.
1083     */
1084    /* package */ void pauseWifiScan() {
1085        if (mWifiManager.isWifiEnabled()) {
1086            mScanner.pause();
1087        }
1088    }
1089
1090    /**
1091     * Requests wifi module to resume wifi scan. May be ignored when the module is disabled.
1092     */
1093    /* package */ void resumeWifiScan() {
1094        if (mWifiManager.isWifiEnabled()) {
1095            mScanner.resume();
1096        }
1097    }
1098
1099    @Override
1100    protected int getHelpResource() {
1101        if (mSetupWizardMode) {
1102            return 0;
1103        }
1104        return R.string.help_url_wifi;
1105    }
1106
1107    /**
1108     * Used as the outer frame of all setup wizard pages that need to adjust their margins based
1109     * on the total size of the available display. (e.g. side margins set to 10% of total width.)
1110     */
1111    public static class ProportionalOuterFrame extends RelativeLayout {
1112        public ProportionalOuterFrame(Context context) {
1113            super(context);
1114        }
1115        public ProportionalOuterFrame(Context context, AttributeSet attrs) {
1116            super(context, attrs);
1117        }
1118        public ProportionalOuterFrame(Context context, AttributeSet attrs, int defStyle) {
1119            super(context, attrs, defStyle);
1120        }
1121
1122        /**
1123         * Set our margins and title area height proportionally to the available display size
1124         */
1125        @Override
1126        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
1127            int parentWidth = MeasureSpec.getSize(widthMeasureSpec);
1128            int parentHeight = MeasureSpec.getSize(heightMeasureSpec);
1129            final Resources res = getContext().getResources();
1130            float titleHeight = res.getFraction(R.dimen.setup_title_height, 1, 1);
1131            float sideMargin = res.getFraction(R.dimen.setup_border_width, 1, 1);
1132            int bottom = res.getDimensionPixelSize(R.dimen.setup_margin_bottom);
1133            setPaddingRelative(
1134                    (int) (parentWidth * sideMargin),
1135                    0,
1136                    (int) (parentWidth * sideMargin),
1137                    bottom);
1138            View title = findViewById(R.id.title_area);
1139            if (title != null) {
1140                title.setMinimumHeight((int) (parentHeight * titleHeight));
1141            }
1142            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
1143        }
1144    }
1145
1146    public static final SearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
1147        new BaseSearchIndexProvider() {
1148            @Override
1149            public List<SearchIndexableRaw> getRawDataToIndex(Context context, boolean enabled) {
1150                final List<SearchIndexableRaw> result = new ArrayList<SearchIndexableRaw>();
1151                final Resources res = context.getResources();
1152
1153                // Add fragment title
1154                SearchIndexableRaw data = new SearchIndexableRaw(context);
1155                data.title = res.getString(R.string.wifi_settings);
1156                data.screenTitle = res.getString(R.string.wifi_settings);
1157                result.add(data);
1158
1159                // Add available Wi-Fi access points
1160                WifiManager wifiManager =
1161                        (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
1162                final Collection<AccessPoint> accessPoints =
1163                        constructAccessPoints(context, wifiManager, null, null);
1164                for (AccessPoint accessPoint : accessPoints) {
1165                    // We are indexing only the saved Wi-Fi networks.
1166                    if (accessPoint.getConfig() == null) continue;
1167                    data = new SearchIndexableRaw(context);
1168                    data.title = accessPoint.getTitle().toString();
1169                    data.screenTitle = res.getString(R.string.wifi_settings);
1170                    data.enabled = enabled;
1171                    result.add(data);
1172                }
1173
1174                return result;
1175            }
1176        };
1177}
1178