WifiSettings.java revision b21815e32099303c89f795a44b02f488fed20d6b 
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 android.app.Activity;
20import android.app.Dialog;
21import android.app.admin.DevicePolicyManager;
22import android.content.BroadcastReceiver;
23import android.content.ComponentName;
24import android.content.ContentResolver;
25import android.content.Context;
26import android.content.Intent;
27import android.content.IntentFilter;
28import android.content.pm.PackageManager;
29import android.content.pm.PackageManager.NameNotFoundException;
30import android.content.res.Resources;
31import android.net.ConnectivityManager;
32import android.net.NetworkInfo;
33import android.net.NetworkInfo.State;
34import android.net.wifi.WifiConfiguration;
35import android.net.wifi.WifiManager;
36import android.net.wifi.WpsInfo;
37import android.nfc.NfcAdapter;
38import android.os.Bundle;
39import android.os.HandlerThread;
40import android.os.Process;
41import android.provider.Settings;
42import android.support.v7.preference.Preference;
43import android.support.v7.preference.PreferenceViewHolder;
44import android.text.Spannable;
45import android.text.TextUtils;
46import android.text.style.TextAppearanceSpan;
47import android.util.Log;
48import android.view.ContextMenu;
49import android.view.ContextMenu.ContextMenuInfo;
50import android.view.Menu;
51import android.view.MenuInflater;
52import android.view.MenuItem;
53import android.view.View;
54import android.widget.ProgressBar;
55import android.widget.TextView;
56import android.widget.TextView.BufferType;
57import android.widget.Toast;
58
59import com.android.internal.logging.MetricsLogger;
60import com.android.internal.logging.MetricsProto.MetricsEvent;
61import com.android.settings.LinkifyUtils;
62import com.android.settings.R;
63import com.android.settings.RestrictedSettingsFragment;
64import com.android.settings.SettingsActivity;
65import com.android.settings.dashboard.SummaryLoader;
66import com.android.settings.location.ScanningSettings;
67import com.android.settings.search.BaseSearchIndexProvider;
68import com.android.settings.search.Indexable;
69import com.android.settings.search.SearchIndexableRaw;
70import com.android.settingslib.RestrictedLockUtils;
71import com.android.settingslib.wifi.AccessPoint;
72import com.android.settingslib.wifi.AccessPoint.AccessPointListener;
73import com.android.settingslib.wifi.AccessPointPreference;
74import com.android.settingslib.wifi.WifiStatusTracker;
75import com.android.settingslib.wifi.WifiTracker;
76
77import java.util.ArrayList;
78import java.util.Collection;
79import java.util.List;
80
81import static android.os.UserManager.DISALLOW_CONFIG_WIFI;
82
83/**
84 * Two types of UI are provided here.
85 *
86 * The first is for "usual Settings", appearing as any other Setup fragment.
87 *
88 * The second is for Setup Wizard, with a simplified interface that hides the action bar
89 * and menus.
90 */
91public class WifiSettings extends RestrictedSettingsFragment
92        implements Indexable, WifiTracker.WifiListener, AccessPointListener,
93        WifiDialog.WifiDialogListener {
94
95    private static final String TAG = "WifiSettings";
96
97    /* package */ static final int MENU_ID_WPS_PBC = Menu.FIRST;
98    private static final int MENU_ID_WPS_PIN = Menu.FIRST + 1;
99    private static final int MENU_ID_ADVANCED = Menu.FIRST + 4;
100    private static final int MENU_ID_SCAN = Menu.FIRST + 5;
101    private static final int MENU_ID_CONNECT = Menu.FIRST + 6;
102    private static final int MENU_ID_FORGET = Menu.FIRST + 7;
103    private static final int MENU_ID_MODIFY = Menu.FIRST + 8;
104    private static final int MENU_ID_WRITE_NFC = Menu.FIRST + 9;
105    private static final int MENU_ID_CONFIGURE = Menu.FIRST + 10;
106
107    public static final int WIFI_DIALOG_ID = 1;
108    /* package */ static final int WPS_PBC_DIALOG_ID = 2;
109    private static final int WPS_PIN_DIALOG_ID = 3;
110    private static final int WRITE_NFC_DIALOG_ID = 6;
111
112    // Instance state keys
113    private static final String SAVE_DIALOG_MODE = "dialog_mode";
114    private static final String SAVE_DIALOG_ACCESS_POINT_STATE = "wifi_ap_state";
115    private static final String SAVED_WIFI_NFC_DIALOG_STATE = "wifi_nfc_dlg_state";
116
117    private static final String PREF_KEY_EMPTY_WIFI_LIST = "wifi_empty_list";
118
119    protected WifiManager mWifiManager;
120    private WifiManager.ActionListener mConnectListener;
121    private WifiManager.ActionListener mSaveListener;
122    private WifiManager.ActionListener mForgetListener;
123
124    private WifiEnabler mWifiEnabler;
125    // An access point being editted is stored here.
126    private AccessPoint mSelectedAccessPoint;
127
128    private WifiDialog mDialog;
129    private WriteWifiConfigToNfcDialog mWifiToNfcDialog;
130
131    private ProgressBar mProgressHeader;
132
133    // this boolean extra specifies whether to disable the Next button when not connected. Used by
134    // account creation outside of setup wizard.
135    private static final String EXTRA_ENABLE_NEXT_ON_CONNECT = "wifi_enable_next_on_connect";
136    // This string extra specifies a network to open the connect dialog on, so the user can enter
137    // network credentials.  This is used by quick settings for secured networks.
138    private static final String EXTRA_START_CONNECT_SSID = "wifi_start_connect_ssid";
139
140    // should Next button only be enabled when we have a connection?
141    private boolean mEnableNextOnConnection;
142
143    // Save the dialog details
144    private int mDialogMode;
145    private AccessPoint mDlgAccessPoint;
146    private Bundle mAccessPointSavedState;
147    private Bundle mWifiNfcDialogSavedState;
148
149    private WifiTracker mWifiTracker;
150    private String mOpenSsid;
151
152    private HandlerThread mBgThread;
153
154    private AccessPointPreference.UserBadgeCache mUserBadgeCache;
155    private Preference mAddPreference;
156
157    private MenuItem mScanMenuItem;
158
159    /* End of "used in Wifi Setup context" */
160
161    public WifiSettings() {
162        super(DISALLOW_CONFIG_WIFI);
163    }
164
165    @Override
166    public void onViewCreated(View view, Bundle savedInstanceState) {
167        super.onViewCreated(view, savedInstanceState);
168        final Activity activity = getActivity();
169        if (activity != null) {
170            mProgressHeader = (ProgressBar) setPinnedHeaderView(R.layout.wifi_progress_header);
171        }
172    }
173
174    @Override
175    public void onCreate(Bundle icicle) {
176        super.onCreate(icicle);
177        addPreferencesFromResource(R.xml.wifi_settings);
178        mAddPreference = new Preference(getContext());
179        mAddPreference.setIcon(R.drawable.ic_menu_add_inset);
180        mAddPreference.setTitle(R.string.wifi_add_network);
181
182        mUserBadgeCache = new AccessPointPreference.UserBadgeCache(getPackageManager());
183
184        mBgThread = new HandlerThread(TAG, Process.THREAD_PRIORITY_BACKGROUND);
185        mBgThread.start();
186    }
187
188    @Override
189    public void onDestroy() {
190        mBgThread.quit();
191        super.onDestroy();
192    }
193
194    @Override
195    public void onActivityCreated(Bundle savedInstanceState) {
196        super.onActivityCreated(savedInstanceState);
197
198        mWifiTracker =
199                new WifiTracker(getActivity(), this, mBgThread.getLooper(), true, true, false);
200        mWifiManager = mWifiTracker.getManager();
201
202        mConnectListener = new WifiManager.ActionListener() {
203                                   @Override
204                                   public void onSuccess() {
205                                   }
206                                   @Override
207                                   public void onFailure(int reason) {
208                                       Activity activity = getActivity();
209                                       if (activity != null) {
210                                           Toast.makeText(activity,
211                                                R.string.wifi_failed_connect_message,
212                                                Toast.LENGTH_SHORT).show();
213                                       }
214                                   }
215                               };
216
217        mSaveListener = new WifiManager.ActionListener() {
218                                @Override
219                                public void onSuccess() {
220                                }
221                                @Override
222                                public void onFailure(int reason) {
223                                    Activity activity = getActivity();
224                                    if (activity != null) {
225                                        Toast.makeText(activity,
226                                            R.string.wifi_failed_save_message,
227                                            Toast.LENGTH_SHORT).show();
228                                    }
229                                }
230                            };
231
232        mForgetListener = new WifiManager.ActionListener() {
233                                   @Override
234                                   public void onSuccess() {
235                                   }
236                                   @Override
237                                   public void onFailure(int reason) {
238                                       Activity activity = getActivity();
239                                       if (activity != null) {
240                                           Toast.makeText(activity,
241                                               R.string.wifi_failed_forget_message,
242                                               Toast.LENGTH_SHORT).show();
243                                       }
244                                   }
245                               };
246
247        if (savedInstanceState != null) {
248            mDialogMode = savedInstanceState.getInt(SAVE_DIALOG_MODE);
249            if (savedInstanceState.containsKey(SAVE_DIALOG_ACCESS_POINT_STATE)) {
250                mAccessPointSavedState =
251                    savedInstanceState.getBundle(SAVE_DIALOG_ACCESS_POINT_STATE);
252            }
253
254            if (savedInstanceState.containsKey(SAVED_WIFI_NFC_DIALOG_STATE)) {
255                mWifiNfcDialogSavedState =
256                    savedInstanceState.getBundle(SAVED_WIFI_NFC_DIALOG_STATE);
257            }
258        }
259
260        // if we're supposed to enable/disable the Next button based on our current connection
261        // state, start it off in the right state
262        Intent intent = getActivity().getIntent();
263        mEnableNextOnConnection = intent.getBooleanExtra(EXTRA_ENABLE_NEXT_ON_CONNECT, false);
264
265        if (mEnableNextOnConnection) {
266            if (hasNextButton()) {
267                final ConnectivityManager connectivity = (ConnectivityManager)
268                        getActivity().getSystemService(Context.CONNECTIVITY_SERVICE);
269                if (connectivity != null) {
270                    NetworkInfo info = connectivity.getNetworkInfo(
271                            ConnectivityManager.TYPE_WIFI);
272                    changeNextButtonState(info.isConnected());
273                }
274            }
275        }
276
277        registerForContextMenu(getListView());
278        setHasOptionsMenu(true);
279
280        if (intent.hasExtra(EXTRA_START_CONNECT_SSID)) {
281            mOpenSsid = intent.getStringExtra(EXTRA_START_CONNECT_SSID);
282            onAccessPointsChanged();
283        }
284    }
285
286    @Override
287    public void onDestroyView() {
288        super.onDestroyView();
289
290        if (mWifiEnabler != null) {
291            mWifiEnabler.teardownSwitchBar();
292        }
293    }
294
295    @Override
296    public void onStart() {
297        super.onStart();
298
299        // On/off switch is hidden for Setup Wizard (returns null)
300        mWifiEnabler = createWifiEnabler();
301    }
302
303    /**
304     * @return new WifiEnabler or null (as overridden by WifiSettingsForSetupWizard)
305     */
306    /* package */ WifiEnabler createWifiEnabler() {
307        final SettingsActivity activity = (SettingsActivity) getActivity();
308        return new WifiEnabler(activity, activity.getSwitchBar());
309    }
310
311    @Override
312    public void onResume() {
313        final Activity activity = getActivity();
314        super.onResume();
315        removePreference("dummy");
316        if (mWifiEnabler != null) {
317            mWifiEnabler.resume(activity);
318        }
319
320        mWifiTracker.startTracking();
321        activity.invalidateOptionsMenu();
322    }
323
324    @Override
325    public void onPause() {
326        super.onPause();
327        if (mWifiEnabler != null) {
328            mWifiEnabler.pause();
329        }
330
331        mWifiTracker.stopTracking();
332    }
333
334    @Override
335    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
336        // If the user is not allowed to configure wifi, do not show the menu.
337        if (isUiRestricted()) return;
338
339        addOptionsMenuItems(menu);
340        super.onCreateOptionsMenu(menu, inflater);
341    }
342
343    /**
344     * @param menu
345     */
346    void addOptionsMenuItems(Menu menu) {
347        final boolean wifiIsEnabled = mWifiTracker.isWifiEnabled();
348        mScanMenuItem = menu.add(Menu.NONE, MENU_ID_SCAN, 0, R.string.menu_stats_refresh);
349        mScanMenuItem.setEnabled(wifiIsEnabled)
350               .setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
351        menu.add(Menu.NONE, MENU_ID_ADVANCED, 0, R.string.wifi_menu_advanced)
352                .setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
353        menu.add(Menu.NONE, MENU_ID_CONFIGURE, 0, R.string.wifi_menu_configure)
354                .setIcon(R.drawable.ic_settings_24dp)
355                .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
356    }
357
358    @Override
359    protected int getMetricsCategory() {
360        return MetricsEvent.WIFI;
361    }
362
363    @Override
364    public void onSaveInstanceState(Bundle outState) {
365        super.onSaveInstanceState(outState);
366
367        // If the dialog is showing, save its state.
368        if (mDialog != null && mDialog.isShowing()) {
369            outState.putInt(SAVE_DIALOG_MODE, mDialogMode);
370            if (mDlgAccessPoint != null) {
371                mAccessPointSavedState = new Bundle();
372                mDlgAccessPoint.saveWifiState(mAccessPointSavedState);
373                outState.putBundle(SAVE_DIALOG_ACCESS_POINT_STATE, mAccessPointSavedState);
374            }
375        }
376
377        if (mWifiToNfcDialog != null && mWifiToNfcDialog.isShowing()) {
378            Bundle savedState = new Bundle();
379            mWifiToNfcDialog.saveState(savedState);
380            outState.putBundle(SAVED_WIFI_NFC_DIALOG_STATE, savedState);
381        }
382    }
383
384    @Override
385    public boolean onOptionsItemSelected(MenuItem item) {
386        // If the user is not allowed to configure wifi, do not handle menu selections.
387        if (isUiRestricted()) return false;
388
389        switch (item.getItemId()) {
390            case MENU_ID_WPS_PBC:
391                showDialog(WPS_PBC_DIALOG_ID);
392                return true;
393                /*
394            case MENU_ID_P2P:
395                if (getActivity() instanceof SettingsActivity) {
396                    ((SettingsActivity) getActivity()).startPreferencePanel(
397                            WifiP2pSettings.class.getCanonicalName(),
398                            null,
399                            R.string.wifi_p2p_settings_title, null,
400                            this, 0);
401                } else {
402                    startFragment(this, WifiP2pSettings.class.getCanonicalName(),
403                            R.string.wifi_p2p_settings_title, -1, null);
404                }
405                return true;
406                */
407            case MENU_ID_WPS_PIN:
408                showDialog(WPS_PIN_DIALOG_ID);
409                return true;
410            case MENU_ID_SCAN:
411                MetricsLogger.action(getActivity(), MetricsEvent.ACTION_WIFI_FORCE_SCAN);
412                mWifiTracker.forceScan();
413                return true;
414            case MENU_ID_ADVANCED:
415                if (getActivity() instanceof SettingsActivity) {
416                    ((SettingsActivity) getActivity()).startPreferencePanel(
417                            AdvancedWifiSettings.class.getCanonicalName(), null,
418                            R.string.wifi_advanced_titlebar, null, this, 0);
419                } else {
420                    startFragment(this, AdvancedWifiSettings.class.getCanonicalName(),
421                            R.string.wifi_advanced_titlebar, -1 /* Do not request a results */,
422                            null);
423                }
424                return true;
425            case MENU_ID_CONFIGURE:
426                if (getActivity() instanceof SettingsActivity) {
427                    ((SettingsActivity) getActivity()).startPreferencePanel(
428                            ConfigureWifiSettings.class.getCanonicalName(), null,
429                            R.string.wifi_configure_titlebar, null, this, 0);
430                } else {
431                    startFragment(this, ConfigureWifiSettings.class.getCanonicalName(),
432                            R.string.wifi_configure_titlebar, -1 /* Do not request a results */,
433                            null);
434                }
435                return true;
436
437        }
438        return super.onOptionsItemSelected(item);
439    }
440
441    @Override
442    public void onCreateContextMenu(ContextMenu menu, View view, ContextMenuInfo info) {
443            Preference preference = (Preference) view.getTag();
444
445            if (preference instanceof LongPressAccessPointPreference) {
446                mSelectedAccessPoint =
447                        ((LongPressAccessPointPreference) preference).getAccessPoint();
448                menu.setHeaderTitle(mSelectedAccessPoint.getSsid());
449                if (mSelectedAccessPoint.isConnectable()) {
450                    menu.add(Menu.NONE, MENU_ID_CONNECT, 0, R.string.wifi_menu_connect);
451                }
452
453                WifiConfiguration config = mSelectedAccessPoint.getConfig();
454                // Some configs are ineditable
455                if (isEditabilityLockedDown(getActivity(), config)) {
456                    return;
457                }
458
459                if (mSelectedAccessPoint.isSaved() || mSelectedAccessPoint.isEphemeral()) {
460                    // Allow forgetting a network if either the network is saved or ephemerally
461                    // connected. (In the latter case, "forget" blacklists the network so it won't
462                    // be used again, ephemerally).
463                    menu.add(Menu.NONE, MENU_ID_FORGET, 0, R.string.wifi_menu_forget);
464                }
465                if (mSelectedAccessPoint.isSaved()) {
466                    menu.add(Menu.NONE, MENU_ID_MODIFY, 0, R.string.wifi_menu_modify);
467                    NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(getActivity());
468                    if (nfcAdapter != null && nfcAdapter.isEnabled() &&
469                            mSelectedAccessPoint.getSecurity() != AccessPoint.SECURITY_NONE) {
470                        // Only allow writing of NFC tags for password-protected networks.
471                        menu.add(Menu.NONE, MENU_ID_WRITE_NFC, 0, R.string.wifi_menu_write_to_nfc);
472                    }
473                }
474            }
475    }
476
477    @Override
478    public boolean onContextItemSelected(MenuItem item) {
479        if (mSelectedAccessPoint == null) {
480            return super.onContextItemSelected(item);
481        }
482        switch (item.getItemId()) {
483            case MENU_ID_CONNECT: {
484                boolean isSavedNetwork = mSelectedAccessPoint.isSaved();
485                if (isSavedNetwork) {
486                    connect(mSelectedAccessPoint.getConfig(), isSavedNetwork);
487                } else if (mSelectedAccessPoint.getSecurity() == AccessPoint.SECURITY_NONE) {
488                    /** Bypass dialog for unsecured networks */
489                    mSelectedAccessPoint.generateOpenNetworkConfig();
490                    connect(mSelectedAccessPoint.getConfig(), isSavedNetwork);
491                } else {
492                    showDialog(mSelectedAccessPoint, WifiConfigUiBase.MODE_CONNECT);
493                }
494                return true;
495            }
496            case MENU_ID_FORGET: {
497                forget();
498                return true;
499            }
500            case MENU_ID_MODIFY: {
501                showDialog(mSelectedAccessPoint, WifiConfigUiBase.MODE_MODIFY);
502                return true;
503            }
504            case MENU_ID_WRITE_NFC:
505                showDialog(WRITE_NFC_DIALOG_ID);
506                return true;
507
508        }
509        return super.onContextItemSelected(item);
510    }
511
512    @Override
513    public boolean onPreferenceTreeClick(Preference preference) {
514        if (preference instanceof LongPressAccessPointPreference) {
515            mSelectedAccessPoint = ((LongPressAccessPointPreference) preference).getAccessPoint();
516            if (mSelectedAccessPoint == null) {
517                return false;
518            }
519            /** Bypass dialog for unsecured, unsaved, and inactive networks */
520            if (mSelectedAccessPoint.getSecurity() == AccessPoint.SECURITY_NONE &&
521                    !mSelectedAccessPoint.isSaved() && !mSelectedAccessPoint.isActive()) {
522                mSelectedAccessPoint.generateOpenNetworkConfig();
523                connect(mSelectedAccessPoint.getConfig(), false /* isSavedNetwork */);
524            } else if (mSelectedAccessPoint.isSaved()) {
525                showDialog(mSelectedAccessPoint, WifiConfigUiBase.MODE_VIEW);
526            } else {
527                showDialog(mSelectedAccessPoint, WifiConfigUiBase.MODE_CONNECT);
528            }
529        } else if (preference == mAddPreference) {
530            onAddNetworkPressed();
531        } else {
532            return super.onPreferenceTreeClick(preference);
533        }
534        return true;
535    }
536
537    private void showDialog(AccessPoint accessPoint, int dialogMode) {
538        if (accessPoint != null) {
539            WifiConfiguration config = accessPoint.getConfig();
540            if (isEditabilityLockedDown(getActivity(), config) && accessPoint.isActive()) {
541                RestrictedLockUtils.sendShowAdminSupportDetailsIntent(getActivity(),
542                        RestrictedLockUtils.getDeviceOwner(getActivity()));
543                return;
544            }
545        }
546
547        if (mDialog != null) {
548            removeDialog(WIFI_DIALOG_ID);
549            mDialog = null;
550        }
551
552        // Save the access point and edit mode
553        mDlgAccessPoint = accessPoint;
554        mDialogMode = dialogMode;
555
556        showDialog(WIFI_DIALOG_ID);
557    }
558
559    @Override
560    public Dialog onCreateDialog(int dialogId) {
561        switch (dialogId) {
562            case WIFI_DIALOG_ID:
563                AccessPoint ap = mDlgAccessPoint; // For manual launch
564                if (ap == null) { // For re-launch from saved state
565                    if (mAccessPointSavedState != null) {
566                        ap = new AccessPoint(getActivity(), mAccessPointSavedState);
567                        // For repeated orientation changes
568                        mDlgAccessPoint = ap;
569                        // Reset the saved access point data
570                        mAccessPointSavedState = null;
571                    }
572                }
573                // If it's null, fine, it's for Add Network
574                mSelectedAccessPoint = ap;
575                mDialog = new WifiDialog(getActivity(), this, ap, mDialogMode,
576                        /* no hide submit/connect */ false);
577                return mDialog;
578            case WPS_PBC_DIALOG_ID:
579                return new WpsDialog(getActivity(), WpsInfo.PBC);
580            case WPS_PIN_DIALOG_ID:
581                return new WpsDialog(getActivity(), WpsInfo.DISPLAY);
582            case WRITE_NFC_DIALOG_ID:
583                if (mSelectedAccessPoint != null) {
584                    mWifiToNfcDialog = new WriteWifiConfigToNfcDialog(
585                            getActivity(), mSelectedAccessPoint.getConfig().networkId,
586                            mSelectedAccessPoint.getSecurity(),
587                            mWifiManager);
588                } else if (mWifiNfcDialogSavedState != null) {
589                    mWifiToNfcDialog = new WriteWifiConfigToNfcDialog(
590                            getActivity(), mWifiNfcDialogSavedState, mWifiManager);
591                }
592
593                return mWifiToNfcDialog;
594        }
595        return super.onCreateDialog(dialogId);
596    }
597
598    /**
599     * Shows the latest access points available with supplemental information like
600     * the strength of network and the security for it.
601     */
602    @Override
603    public void onAccessPointsChanged() {
604        // Safeguard from some delayed event handling
605        if (getActivity() == null) return;
606        if (isUiRestricted()) {
607            if (!isUiRestrictedByOnlyAdmin()) {
608                addMessagePreference(R.string.wifi_empty_list_user_restricted);
609            }
610            getPreferenceScreen().removeAll();
611            return;
612        }
613        final int wifiState = mWifiManager.getWifiState();
614
615        switch (wifiState) {
616            case WifiManager.WIFI_STATE_ENABLED:
617                // AccessPoints are automatically sorted with TreeSet.
618                final Collection<AccessPoint> accessPoints =
619                        mWifiTracker.getAccessPoints();
620
621                boolean hasAvailableAccessPoints = false;
622                int index = 0;
623                cacheRemoveAllPrefs(getPreferenceScreen());
624                for (AccessPoint accessPoint : accessPoints) {
625                    // Ignore access points that are out of range.
626                    if (accessPoint.getLevel() != -1) {
627                        String key = accessPoint.getBssid();
628                        if (TextUtils.isEmpty(key)) {
629                            key = accessPoint.getSsidStr();
630                        }
631                        hasAvailableAccessPoints = true;
632                        LongPressAccessPointPreference pref = (LongPressAccessPointPreference)
633                                getCachedPreference(key);
634                        if (pref != null) {
635                            pref.setOrder(index++);
636                            continue;
637                        }
638                        LongPressAccessPointPreference
639                                preference = new LongPressAccessPointPreference(accessPoint,
640                                getPrefContext(), mUserBadgeCache, false,
641                                R.drawable.ic_wifi_signal_0, this);
642                        preference.setKey(key);
643                        preference.setOrder(index++);
644                        if (mOpenSsid != null && mOpenSsid.equals(accessPoint.getSsidStr())
645                                && !accessPoint.isSaved()
646                                && accessPoint.getSecurity() != AccessPoint.SECURITY_NONE) {
647                            onPreferenceTreeClick(preference);
648                            mOpenSsid = null;
649                        }
650                        getPreferenceScreen().addPreference(preference);
651                        accessPoint.setListener(this);
652                        preference.refresh();
653                    }
654                }
655                removeCachedPrefs(getPreferenceScreen());
656                if (!hasAvailableAccessPoints) {
657                    setProgressBarVisible(true);
658                    Preference pref = new Preference(getContext()) {
659                        @Override
660                        public void onBindViewHolder(PreferenceViewHolder holder) {
661                            super.onBindViewHolder(holder);
662                            // Show a line on each side of add network.
663                            holder.setDividerAllowedBelow(true);
664                        }
665                    };
666                    pref.setSelectable(false);
667                    pref.setSummary(R.string.wifi_empty_list_wifi_on);
668                    pref.setOrder(0);
669                    pref.setKey(PREF_KEY_EMPTY_WIFI_LIST);
670                    getPreferenceScreen().addPreference(pref);
671                    mAddPreference.setOrder(1);
672                    getPreferenceScreen().addPreference(mAddPreference);
673                } else {
674                    mAddPreference.setOrder(index++);
675                    getPreferenceScreen().addPreference(mAddPreference);
676                    setProgressBarVisible(false);
677                }
678                if (mScanMenuItem != null) {
679                    mScanMenuItem.setEnabled(true);
680                }
681                break;
682
683            case WifiManager.WIFI_STATE_ENABLING:
684                getPreferenceScreen().removeAll();
685                setProgressBarVisible(true);
686                break;
687
688            case WifiManager.WIFI_STATE_DISABLING:
689                addMessagePreference(R.string.wifi_stopping);
690                setProgressBarVisible(true);
691                break;
692
693            case WifiManager.WIFI_STATE_DISABLED:
694                setOffMessage();
695                setProgressBarVisible(false);
696                if (mScanMenuItem != null) {
697                    mScanMenuItem.setEnabled(false);
698                }
699                break;
700        }
701    }
702
703    private void setOffMessage() {
704        if (isUiRestricted()) {
705            if (!isUiRestrictedByOnlyAdmin()) {
706                addMessagePreference(R.string.wifi_empty_list_user_restricted);
707            }
708            getPreferenceScreen().removeAll();
709            return;
710        }
711
712        TextView emptyTextView = getEmptyTextView();
713        if (emptyTextView == null) {
714            return;
715        }
716
717        final CharSequence briefText = getText(R.string.wifi_empty_list_wifi_off);
718
719        // Don't use WifiManager.isScanAlwaysAvailable() to check the Wi-Fi scanning mode. Instead,
720        // read the system settings directly. Because when the device is in Airplane mode, even if
721        // Wi-Fi scanning mode is on, WifiManager.isScanAlwaysAvailable() still returns "off".
722        final ContentResolver resolver = getActivity().getContentResolver();
723        final boolean wifiScanningMode = Settings.Global.getInt(
724                resolver, Settings.Global.WIFI_SCAN_ALWAYS_AVAILABLE, 0) == 1;
725
726        if (!wifiScanningMode) {
727            // Show only the brief text if the user is not allowed to configure scanning settings,
728            // or the scanning mode has been turned off.
729            emptyTextView.setText(briefText, BufferType.SPANNABLE);
730        } else {
731            // Append the description of scanning settings with link.
732            final StringBuilder contentBuilder = new StringBuilder();
733            contentBuilder.append(briefText);
734            contentBuilder.append("\n\n");
735            contentBuilder.append(getText(R.string.wifi_scan_notify_text));
736            LinkifyUtils.linkify(emptyTextView, contentBuilder, new LinkifyUtils.OnClickListener() {
737                @Override
738                public void onClick() {
739                    final SettingsActivity activity =
740                            (SettingsActivity) WifiSettings.this.getActivity();
741                    activity.startPreferencePanel(ScanningSettings.class.getName(), null,
742                            R.string.location_scanning_screen_title, null, null, 0);
743                }
744            });
745        }
746        // Embolden and enlarge the brief description anyway.
747        Spannable boldSpan = (Spannable) emptyTextView.getText();
748        boldSpan.setSpan(
749                new TextAppearanceSpan(getActivity(), android.R.style.TextAppearance_Medium), 0,
750                briefText.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
751        getPreferenceScreen().removeAll();
752    }
753
754    private void addMessagePreference(int messageId) {
755        TextView emptyTextView = getEmptyTextView();
756        if (emptyTextView != null) emptyTextView.setText(messageId);
757        getPreferenceScreen().removeAll();
758    }
759
760    protected void setProgressBarVisible(boolean visible) {
761        if (mProgressHeader != null) {
762            mProgressHeader.setVisibility(visible ? View.VISIBLE : View.GONE);
763        }
764    }
765
766    @Override
767    public void onWifiStateChanged(int state) {
768        switch (state) {
769            case WifiManager.WIFI_STATE_ENABLING:
770                addMessagePreference(R.string.wifi_starting);
771                setProgressBarVisible(true);
772                break;
773
774            case WifiManager.WIFI_STATE_DISABLED:
775                setOffMessage();
776                setProgressBarVisible(false);
777                break;
778        }
779    }
780
781    @Override
782    public void onConnectedChanged() {
783        changeNextButtonState(mWifiTracker.isConnected());
784    }
785
786    /**
787     * Renames/replaces "Next" button when appropriate. "Next" button usually exists in
788     * Wifi setup screens, not in usual wifi settings screen.
789     *
790     * @param enabled true when the device is connected to a wifi network.
791     */
792    private void changeNextButtonState(boolean enabled) {
793        if (mEnableNextOnConnection && hasNextButton()) {
794            getNextButton().setEnabled(enabled);
795        }
796    }
797
798    @Override
799    public void onForget(WifiDialog dialog) {
800        forget();
801    }
802
803    @Override
804    public void onSubmit(WifiDialog dialog) {
805        if (mDialog != null) {
806            submit(mDialog.getController());
807        }
808    }
809
810    /* package */ void submit(WifiConfigController configController) {
811
812        final WifiConfiguration config = configController.getConfig();
813
814        if (config == null) {
815            if (mSelectedAccessPoint != null
816                    && mSelectedAccessPoint.isSaved()) {
817                connect(mSelectedAccessPoint.getConfig(), true /* isSavedNetwork */);
818            }
819        } else if (configController.getMode() == WifiConfigUiBase.MODE_MODIFY) {
820            mWifiManager.save(config, mSaveListener);
821        } else {
822            mWifiManager.save(config, mSaveListener);
823            if (mSelectedAccessPoint != null) { // Not an "Add network"
824                connect(config, false /* isSavedNetwork */);
825            }
826        }
827
828        mWifiTracker.resumeScanning();
829    }
830
831    /* package */ void forget() {
832        MetricsLogger.action(getActivity(), MetricsEvent.ACTION_WIFI_FORGET);
833        if (!mSelectedAccessPoint.isSaved()) {
834            if (mSelectedAccessPoint.getNetworkInfo() != null &&
835                    mSelectedAccessPoint.getNetworkInfo().getState() != State.DISCONNECTED) {
836                // Network is active but has no network ID - must be ephemeral.
837                mWifiManager.disableEphemeralNetwork(
838                        AccessPoint.convertToQuotedString(mSelectedAccessPoint.getSsidStr()));
839            } else {
840                // Should not happen, but a monkey seems to trigger it
841                Log.e(TAG, "Failed to forget invalid network " + mSelectedAccessPoint.getConfig());
842                return;
843            }
844        } else {
845            mWifiManager.forget(mSelectedAccessPoint.getConfig().networkId, mForgetListener);
846        }
847
848        mWifiTracker.resumeScanning();
849
850        // We need to rename/replace "Next" button in wifi setup context.
851        changeNextButtonState(false);
852    }
853
854    protected void connect(final WifiConfiguration config, boolean isSavedNetwork) {
855        // Log subtype if configuration is a saved network.
856        MetricsLogger.action(getActivity(), MetricsEvent.ACTION_WIFI_CONNECT,
857                isSavedNetwork);
858        mWifiManager.connect(config, mConnectListener);
859    }
860
861    protected void connect(final int networkId, boolean isSavedNetwork) {
862        // Log subtype if configuration is a saved network.
863        MetricsLogger.action(getActivity(), MetricsEvent.ACTION_WIFI_CONNECT,
864                isSavedNetwork);
865        mWifiManager.connect(networkId, mConnectListener);
866    }
867
868    /**
869     * Called when "add network" button is pressed.
870     */
871    /* package */ void onAddNetworkPressed() {
872        MetricsLogger.action(getActivity(), MetricsEvent.ACTION_WIFI_ADD_NETWORK);
873        // No exact access point is selected.
874        mSelectedAccessPoint = null;
875        showDialog(null, WifiConfigUiBase.MODE_CONNECT);
876    }
877
878    @Override
879    protected int getHelpResource() {
880        return R.string.help_url_wifi;
881    }
882
883    @Override
884    public void onAccessPointChanged(final AccessPoint accessPoint) {
885        View view = getView();
886        if (view != null) {
887            view.post(new Runnable() {
888                @Override
889                public void run() {
890                    Object tag = accessPoint.getTag();
891                    if (tag != null) {
892                        ((LongPressAccessPointPreference) tag).refresh();
893                    }
894                }
895            });
896        }
897    }
898
899    @Override
900    public void onLevelChanged(AccessPoint accessPoint) {
901        ((LongPressAccessPointPreference) accessPoint.getTag()).onLevelChanged();
902    }
903
904    public static final SearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
905        new BaseSearchIndexProvider() {
906            @Override
907            public List<SearchIndexableRaw> getRawDataToIndex(Context context, boolean enabled) {
908                final List<SearchIndexableRaw> result = new ArrayList<>();
909                final Resources res = context.getResources();
910
911                // Add fragment title
912                SearchIndexableRaw data = new SearchIndexableRaw(context);
913                data.title = res.getString(R.string.wifi_settings);
914                data.screenTitle = res.getString(R.string.wifi_settings);
915                data.keywords = res.getString(R.string.keywords_wifi);
916                result.add(data);
917
918                // Add saved Wi-Fi access points
919                final Collection<AccessPoint> accessPoints =
920                        WifiTracker.getCurrentAccessPoints(context, true, false, false);
921                for (AccessPoint accessPoint : accessPoints) {
922                    data = new SearchIndexableRaw(context);
923                    data.title = accessPoint.getSsidStr();
924                    data.screenTitle = res.getString(R.string.wifi_settings);
925                    data.enabled = enabled;
926                    result.add(data);
927                }
928
929                return result;
930            }
931        };
932
933    /**
934     * Returns true if the config is not editable through Settings.
935     * @param context Context of caller
936     * @param config The WiFi config.
937     * @return true if the config is not editable through Settings.
938     */
939    static boolean isEditabilityLockedDown(Context context, WifiConfiguration config) {
940        return !canModifyNetwork(context, config);
941    }
942
943    /**
944     * This method is a stripped version of WifiConfigStore.canModifyNetwork.
945     * TODO: refactor to have only one method.
946     * @param context Context of caller
947     * @param config The WiFi config.
948     * @return true if Settings can modify the config.
949     */
950    static boolean canModifyNetwork(Context context, WifiConfiguration config) {
951        if (config == null) {
952            return true;
953        }
954
955        final DevicePolicyManager dpm = (DevicePolicyManager) context.getSystemService(
956                Context.DEVICE_POLICY_SERVICE);
957
958        // Check if device has DPM capability. If it has and dpm is still null, then we
959        // treat this case with suspicion and bail out.
960        final PackageManager pm = context.getPackageManager();
961        if (pm.hasSystemFeature(PackageManager.FEATURE_DEVICE_ADMIN) && dpm == null) {
962            return false;
963        }
964
965        boolean isConfigEligibleForLockdown = false;
966        if (dpm != null) {
967            final ComponentName deviceOwner = dpm.getDeviceOwnerComponentOnAnyUser();
968            if (deviceOwner != null) {
969                final int deviceOwnerUserId = dpm.getDeviceOwnerUserId();
970                try {
971                    final int deviceOwnerUid = pm.getPackageUidAsUser(deviceOwner.getPackageName(),
972                            deviceOwnerUserId);
973                    isConfigEligibleForLockdown = deviceOwnerUid == config.creatorUid;
974                } catch (NameNotFoundException e) {
975                    // don't care
976                }
977            }
978        }
979        if (!isConfigEligibleForLockdown) {
980            return true;
981        }
982
983        final ContentResolver resolver = context.getContentResolver();
984        final boolean isLockdownFeatureEnabled = Settings.Global.getInt(resolver,
985                Settings.Global.WIFI_DEVICE_OWNER_CONFIGS_LOCKDOWN, 0) != 0;
986        return !isLockdownFeatureEnabled;
987    }
988
989    private static class SummaryProvider extends BroadcastReceiver
990            implements SummaryLoader.SummaryProvider {
991
992        private final Context mContext;
993        private final WifiManager mWifiManager;
994        private final WifiStatusTracker mWifiTracker;
995        private final SummaryLoader mSummaryLoader;
996
997        public SummaryProvider(Context context, SummaryLoader summaryLoader) {
998            mContext = context;
999            mSummaryLoader = summaryLoader;
1000            mWifiManager = context.getSystemService(WifiManager.class);
1001            mWifiTracker = new WifiStatusTracker(mWifiManager);
1002        }
1003
1004        private CharSequence getSummary() {
1005            if (!mWifiTracker.enabled) {
1006                return mContext.getString(R.string.wifi_disabled_generic);
1007            }
1008            if (!mWifiTracker.connected) {
1009                return mContext.getString(R.string.disconnected);
1010            }
1011            return mWifiTracker.ssid;
1012        }
1013
1014        @Override
1015        public void setListening(boolean listening) {
1016            if (listening) {
1017                IntentFilter filter = new IntentFilter();
1018                filter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION);
1019                filter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION);
1020                filter.addAction(WifiManager.RSSI_CHANGED_ACTION);
1021                mSummaryLoader.registerReceiver(this, filter);
1022            }
1023        }
1024
1025        @Override
1026        public void onReceive(Context context, Intent intent) {
1027            mWifiTracker.handleBroadcast(intent);
1028            mSummaryLoader.setSummary(this, getSummary());
1029        }
1030    }
1031
1032    public static final SummaryLoader.SummaryProviderFactory SUMMARY_PROVIDER_FACTORY
1033            = new SummaryLoader.SummaryProviderFactory() {
1034        @Override
1035        public SummaryLoader.SummaryProvider createSummaryProvider(Activity activity,
1036                                                                   SummaryLoader summaryLoader) {
1037            return new SummaryProvider(activity, summaryLoader);
1038        }
1039    };
1040}
1041