ChooserActivity.java revision 97a8d7038646c34b25619d2e2ae9d6c7c8104f35 
1/*
2 * Copyright (C) 2008 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.internal.app;
18
19import android.animation.ObjectAnimator;
20import android.annotation.NonNull;
21import android.app.Activity;
22import android.app.usage.UsageStatsManager;
23import android.content.ComponentName;
24import android.content.Context;
25import android.content.Intent;
26import android.content.IntentSender;
27import android.content.IntentSender.SendIntentException;
28import android.content.ServiceConnection;
29import android.content.SharedPreferences;
30import android.content.pm.ActivityInfo;
31import android.content.pm.LabeledIntent;
32import android.content.pm.PackageManager;
33import android.content.pm.PackageManager.NameNotFoundException;
34import android.content.pm.ResolveInfo;
35import android.database.DataSetObserver;
36import android.graphics.Color;
37import android.graphics.drawable.Drawable;
38import android.graphics.drawable.Icon;
39import android.os.Bundle;
40import android.os.Environment;
41import android.os.Handler;
42import android.os.IBinder;
43import android.os.Message;
44import android.os.Parcelable;
45import android.os.Process;
46import android.os.RemoteException;
47import android.os.ResultReceiver;
48import android.os.UserHandle;
49import android.os.UserManager;
50import android.os.storage.StorageManager;
51import android.service.chooser.ChooserTarget;
52import android.service.chooser.ChooserTargetService;
53import android.service.chooser.IChooserTargetResult;
54import android.service.chooser.IChooserTargetService;
55import android.text.TextUtils;
56import android.util.FloatProperty;
57import android.util.Log;
58import android.util.Slog;
59import android.view.LayoutInflater;
60import android.view.View;
61import android.view.View.MeasureSpec;
62import android.view.View.OnClickListener;
63import android.view.View.OnLongClickListener;
64import android.view.ViewGroup;
65import android.view.ViewGroup.LayoutParams;
66import android.view.animation.AnimationUtils;
67import android.view.animation.Interpolator;
68import android.widget.AbsListView;
69import android.widget.BaseAdapter;
70import android.widget.ListView;
71import com.android.internal.R;
72import com.android.internal.annotations.VisibleForTesting;
73import com.android.internal.app.ResolverActivity.TargetInfo;
74import com.android.internal.logging.MetricsLogger;
75import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
76import com.google.android.collect.Lists;
77
78import java.io.File;
79import java.util.ArrayList;
80import java.util.Collections;
81import java.util.Comparator;
82import java.util.List;
83
84public class ChooserActivity extends ResolverActivity {
85    private static final String TAG = "ChooserActivity";
86
87    private static final boolean DEBUG = false;
88
89    private static final int QUERY_TARGET_SERVICE_LIMIT = 5;
90    private static final int WATCHDOG_TIMEOUT_MILLIS = 5000;
91
92    private Bundle mReplacementExtras;
93    private IntentSender mChosenComponentSender;
94    private IntentSender mRefinementIntentSender;
95    private RefinementResultReceiver mRefinementResultReceiver;
96    private ChooserTarget[] mCallerChooserTargets;
97    private ComponentName[] mFilteredComponentNames;
98
99    private Intent mReferrerFillInIntent;
100
101    private ChooserListAdapter mChooserListAdapter;
102    private ChooserRowAdapter mChooserRowAdapter;
103
104    private SharedPreferences mPinnedSharedPrefs;
105    private static final float PINNED_TARGET_SCORE_BOOST = 1000.f;
106    private static final float CALLER_TARGET_SCORE_BOOST = 900.f;
107    private static final String PINNED_SHARED_PREFS_NAME = "chooser_pin_settings";
108    private static final String TARGET_DETAILS_FRAGMENT_TAG = "targetDetailsFragment";
109
110    private final List<ChooserTargetServiceConnection> mServiceConnections = new ArrayList<>();
111
112    private static final int CHOOSER_TARGET_SERVICE_RESULT = 1;
113    private static final int CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT = 2;
114
115    private final Handler mChooserHandler = new Handler() {
116        @Override
117        public void handleMessage(Message msg) {
118            switch (msg.what) {
119                case CHOOSER_TARGET_SERVICE_RESULT:
120                    if (DEBUG) Log.d(TAG, "CHOOSER_TARGET_SERVICE_RESULT");
121                    if (isDestroyed()) break;
122                    final ServiceResultInfo sri = (ServiceResultInfo) msg.obj;
123                    if (!mServiceConnections.contains(sri.connection)) {
124                        Log.w(TAG, "ChooserTargetServiceConnection " + sri.connection
125                                + " returned after being removed from active connections."
126                                + " Have you considered returning results faster?");
127                        break;
128                    }
129                    if (sri.resultTargets != null) {
130                        mChooserListAdapter.addServiceResults(sri.originalTarget,
131                                sri.resultTargets);
132                    }
133                    unbindService(sri.connection);
134                    sri.connection.destroy();
135                    mServiceConnections.remove(sri.connection);
136                    if (mServiceConnections.isEmpty()) {
137                        mChooserHandler.removeMessages(CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT);
138                        sendVoiceChoicesIfNeeded();
139                        mChooserListAdapter.setShowServiceTargets(true);
140                    }
141                    break;
142
143                case CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT:
144                    if (DEBUG) {
145                        Log.d(TAG, "CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT; unbinding services");
146                    }
147                    unbindRemainingServices();
148                    sendVoiceChoicesIfNeeded();
149                    mChooserListAdapter.setShowServiceTargets(true);
150                    break;
151
152                default:
153                    super.handleMessage(msg);
154            }
155        }
156    };
157
158    @Override
159    protected void onCreate(Bundle savedInstanceState) {
160        Intent intent = getIntent();
161        Parcelable targetParcelable = intent.getParcelableExtra(Intent.EXTRA_INTENT);
162        if (!(targetParcelable instanceof Intent)) {
163            Log.w("ChooserActivity", "Target is not an intent: " + targetParcelable);
164            finish();
165            super.onCreate(null);
166            return;
167        }
168        Intent target = (Intent) targetParcelable;
169        if (target != null) {
170            modifyTargetIntent(target);
171        }
172        Parcelable[] targetsParcelable
173                = intent.getParcelableArrayExtra(Intent.EXTRA_ALTERNATE_INTENTS);
174        if (targetsParcelable != null) {
175            final boolean offset = target == null;
176            Intent[] additionalTargets =
177                    new Intent[offset ? targetsParcelable.length - 1 : targetsParcelable.length];
178            for (int i = 0; i < targetsParcelable.length; i++) {
179                if (!(targetsParcelable[i] instanceof Intent)) {
180                    Log.w(TAG, "EXTRA_ALTERNATE_INTENTS array entry #" + i + " is not an Intent: "
181                            + targetsParcelable[i]);
182                    finish();
183                    super.onCreate(null);
184                    return;
185                }
186                final Intent additionalTarget = (Intent) targetsParcelable[i];
187                if (i == 0 && target == null) {
188                    target = additionalTarget;
189                    modifyTargetIntent(target);
190                } else {
191                    additionalTargets[offset ? i - 1 : i] = additionalTarget;
192                    modifyTargetIntent(additionalTarget);
193                }
194            }
195            setAdditionalTargets(additionalTargets);
196        }
197
198        mReplacementExtras = intent.getBundleExtra(Intent.EXTRA_REPLACEMENT_EXTRAS);
199        CharSequence title = intent.getCharSequenceExtra(Intent.EXTRA_TITLE);
200        int defaultTitleRes = 0;
201        if (title == null) {
202            defaultTitleRes = com.android.internal.R.string.chooseActivity;
203        }
204        Parcelable[] pa = intent.getParcelableArrayExtra(Intent.EXTRA_INITIAL_INTENTS);
205        Intent[] initialIntents = null;
206        if (pa != null) {
207            initialIntents = new Intent[pa.length];
208            for (int i=0; i<pa.length; i++) {
209                if (!(pa[i] instanceof Intent)) {
210                    Log.w(TAG, "Initial intent #" + i + " not an Intent: " + pa[i]);
211                    finish();
212                    super.onCreate(null);
213                    return;
214                }
215                final Intent in = (Intent) pa[i];
216                modifyTargetIntent(in);
217                initialIntents[i] = in;
218            }
219        }
220
221        mReferrerFillInIntent = new Intent().putExtra(Intent.EXTRA_REFERRER, getReferrer());
222
223        mChosenComponentSender = intent.getParcelableExtra(
224                Intent.EXTRA_CHOSEN_COMPONENT_INTENT_SENDER);
225        mRefinementIntentSender = intent.getParcelableExtra(
226                Intent.EXTRA_CHOOSER_REFINEMENT_INTENT_SENDER);
227        setSafeForwardingMode(true);
228
229        pa = intent.getParcelableArrayExtra(Intent.EXTRA_EXCLUDE_COMPONENTS);
230        if (pa != null) {
231            ComponentName[] names = new ComponentName[pa.length];
232            for (int i = 0; i < pa.length; i++) {
233                if (!(pa[i] instanceof ComponentName)) {
234                    Log.w(TAG, "Filtered component #" + i + " not a ComponentName: " + pa[i]);
235                    names = null;
236                    break;
237                }
238                names[i] = (ComponentName) pa[i];
239            }
240            mFilteredComponentNames = names;
241        }
242
243        pa = intent.getParcelableArrayExtra(Intent.EXTRA_CHOOSER_TARGETS);
244        if (pa != null) {
245            ChooserTarget[] targets = new ChooserTarget[pa.length];
246            for (int i = 0; i < pa.length; i++) {
247                if (!(pa[i] instanceof ChooserTarget)) {
248                    Log.w(TAG, "Chooser target #" + i + " not a ChooserTarget: " + pa[i]);
249                    targets = null;
250                    break;
251                }
252                targets[i] = (ChooserTarget) pa[i];
253            }
254            mCallerChooserTargets = targets;
255        }
256
257        mPinnedSharedPrefs = getPinnedSharedPrefs(this);
258        super.onCreate(savedInstanceState, target, title, defaultTitleRes, initialIntents,
259                null, false);
260
261        MetricsLogger.action(this, MetricsEvent.ACTION_ACTIVITY_CHOOSER_SHOWN);
262    }
263
264    static SharedPreferences getPinnedSharedPrefs(Context context) {
265        // The code below is because in the android:ui process, no one can hear you scream.
266        // The package info in the context isn't initialized in the way it is for normal apps,
267        // so the standard, name-based context.getSharedPreferences doesn't work. Instead, we
268        // build the path manually below using the same policy that appears in ContextImpl.
269        // This fails silently under the hood if there's a problem, so if we find ourselves in
270        // the case where we don't have access to credential encrypted storage we just won't
271        // have our pinned target info.
272        final File prefsFile = new File(new File(
273                Environment.getDataUserCePackageDirectory(StorageManager.UUID_PRIVATE_INTERNAL,
274                        context.getUserId(), context.getPackageName()),
275                "shared_prefs"),
276                PINNED_SHARED_PREFS_NAME + ".xml");
277        return context.getSharedPreferences(prefsFile, MODE_PRIVATE);
278    }
279
280    @Override
281    protected void onDestroy() {
282        super.onDestroy();
283        if (mRefinementResultReceiver != null) {
284            mRefinementResultReceiver.destroy();
285            mRefinementResultReceiver = null;
286        }
287        unbindRemainingServices();
288        mChooserHandler.removeMessages(CHOOSER_TARGET_SERVICE_RESULT);
289    }
290
291    @Override
292    public Intent getReplacementIntent(ActivityInfo aInfo, Intent defIntent) {
293        Intent result = defIntent;
294        if (mReplacementExtras != null) {
295            final Bundle replExtras = mReplacementExtras.getBundle(aInfo.packageName);
296            if (replExtras != null) {
297                result = new Intent(defIntent);
298                result.putExtras(replExtras);
299            }
300        }
301        if (aInfo.name.equals(IntentForwarderActivity.FORWARD_INTENT_TO_PARENT)
302                || aInfo.name.equals(IntentForwarderActivity.FORWARD_INTENT_TO_MANAGED_PROFILE)) {
303            result = Intent.createChooser(result,
304                    getIntent().getCharSequenceExtra(Intent.EXTRA_TITLE));
305
306            // Don't auto-launch single intents if the intent is being forwarded. This is done
307            // because automatically launching a resolving application as a response to the user
308            // action of switching accounts is pretty unexpected.
309            result.putExtra(Intent.EXTRA_AUTO_LAUNCH_SINGLE_CHOICE, false);
310        }
311        return result;
312    }
313
314    @Override
315    public void onActivityStarted(TargetInfo cti) {
316        if (mChosenComponentSender != null) {
317            final ComponentName target = cti.getResolvedComponentName();
318            if (target != null) {
319                final Intent fillIn = new Intent().putExtra(Intent.EXTRA_CHOSEN_COMPONENT, target);
320                try {
321                    mChosenComponentSender.sendIntent(this, Activity.RESULT_OK, fillIn, null, null);
322                } catch (IntentSender.SendIntentException e) {
323                    Slog.e(TAG, "Unable to launch supplied IntentSender to report "
324                            + "the chosen component: " + e);
325                }
326            }
327        }
328    }
329
330    @Override
331    public void onPrepareAdapterView(AbsListView adapterView, ResolveListAdapter adapter,
332            boolean alwaysUseOption) {
333        final ListView listView = adapterView instanceof ListView ? (ListView) adapterView : null;
334        mChooserListAdapter = (ChooserListAdapter) adapter;
335        if (mCallerChooserTargets != null && mCallerChooserTargets.length > 0) {
336            mChooserListAdapter.addServiceResults(null, Lists.newArrayList(mCallerChooserTargets));
337        }
338        mChooserRowAdapter = new ChooserRowAdapter(mChooserListAdapter);
339        mChooserRowAdapter.registerDataSetObserver(new OffsetDataSetObserver(adapterView));
340        adapterView.setAdapter(mChooserRowAdapter);
341        if (listView != null) {
342            listView.setItemsCanFocus(true);
343        }
344    }
345
346    @Override
347    public int getLayoutResource() {
348        return R.layout.chooser_grid;
349    }
350
351    @Override
352    public boolean shouldGetActivityMetadata() {
353        return true;
354    }
355
356    @Override
357    public boolean shouldAutoLaunchSingleChoice(TargetInfo target) {
358        return getIntent().getBooleanExtra(Intent.EXTRA_AUTO_LAUNCH_SINGLE_CHOICE,
359                super.shouldAutoLaunchSingleChoice(target));
360    }
361
362    @Override
363    public void showTargetDetails(ResolveInfo ri) {
364        ComponentName name = ri.activityInfo.getComponentName();
365        boolean pinned = mPinnedSharedPrefs.getBoolean(name.flattenToString(), false);
366        ResolverTargetActionsDialogFragment f =
367                new ResolverTargetActionsDialogFragment(ri.loadLabel(getPackageManager()),
368                        name, pinned);
369        f.show(getFragmentManager(), TARGET_DETAILS_FRAGMENT_TAG);
370    }
371
372    private void modifyTargetIntent(Intent in) {
373        final String action = in.getAction();
374        if (Intent.ACTION_SEND.equals(action) ||
375                Intent.ACTION_SEND_MULTIPLE.equals(action)) {
376            in.addFlags(Intent.FLAG_ACTIVITY_NEW_DOCUMENT |
377                    Intent.FLAG_ACTIVITY_MULTIPLE_TASK);
378        }
379    }
380
381    @Override
382    protected boolean onTargetSelected(TargetInfo target, boolean alwaysCheck) {
383        if (mRefinementIntentSender != null) {
384            final Intent fillIn = new Intent();
385            final List<Intent> sourceIntents = target.getAllSourceIntents();
386            if (!sourceIntents.isEmpty()) {
387                fillIn.putExtra(Intent.EXTRA_INTENT, sourceIntents.get(0));
388                if (sourceIntents.size() > 1) {
389                    final Intent[] alts = new Intent[sourceIntents.size() - 1];
390                    for (int i = 1, N = sourceIntents.size(); i < N; i++) {
391                        alts[i - 1] = sourceIntents.get(i);
392                    }
393                    fillIn.putExtra(Intent.EXTRA_ALTERNATE_INTENTS, alts);
394                }
395                if (mRefinementResultReceiver != null) {
396                    mRefinementResultReceiver.destroy();
397                }
398                mRefinementResultReceiver = new RefinementResultReceiver(this, target, null);
399                fillIn.putExtra(Intent.EXTRA_RESULT_RECEIVER,
400                        mRefinementResultReceiver);
401                try {
402                    mRefinementIntentSender.sendIntent(this, 0, fillIn, null, null);
403                    return false;
404                } catch (SendIntentException e) {
405                    Log.e(TAG, "Refinement IntentSender failed to send", e);
406                }
407            }
408        }
409        updateChooserCounts(target, mContentType);
410        return super.onTargetSelected(target, alwaysCheck);
411    }
412
413    @Override
414    public void startSelected(int which, boolean always, boolean filtered) {
415        super.startSelected(which, always, filtered);
416
417        if (mChooserListAdapter != null) {
418            // Log the index of which type of target the user picked.
419            // Lower values mean the ranking was better.
420            int cat = 0;
421            int value = which;
422            switch (mChooserListAdapter.getPositionTargetType(which)) {
423                case ChooserListAdapter.TARGET_CALLER:
424                    cat = MetricsEvent.ACTION_ACTIVITY_CHOOSER_PICKED_APP_TARGET;
425                    break;
426                case ChooserListAdapter.TARGET_SERVICE:
427                    cat = MetricsEvent.ACTION_ACTIVITY_CHOOSER_PICKED_SERVICE_TARGET;
428                    value -= mChooserListAdapter.getCallerTargetCount();
429                    break;
430                case ChooserListAdapter.TARGET_STANDARD:
431                    cat = MetricsEvent.ACTION_ACTIVITY_CHOOSER_PICKED_STANDARD_TARGET;
432                    value -= mChooserListAdapter.getCallerTargetCount()
433                            + mChooserListAdapter.getServiceTargetCount();
434                    break;
435            }
436
437            if (cat != 0) {
438                MetricsLogger.action(this, cat, value);
439            }
440        }
441    }
442
443    void queryTargetServices(ChooserListAdapter adapter) {
444        final PackageManager pm = getPackageManager();
445        int targetsToQuery = 0;
446        for (int i = 0, N = adapter.getDisplayResolveInfoCount(); i < N; i++) {
447            final DisplayResolveInfo dri = adapter.getDisplayResolveInfo(i);
448            if (adapter.getScore(dri) == 0) {
449                // A score of 0 means the app hasn't been used in some time;
450                // don't query it as it's not likely to be relevant.
451                continue;
452            }
453            final ActivityInfo ai = dri.getResolveInfo().activityInfo;
454            final Bundle md = ai.metaData;
455            final String serviceName = md != null ? convertServiceName(ai.packageName,
456                    md.getString(ChooserTargetService.META_DATA_NAME)) : null;
457            if (serviceName != null) {
458                final ComponentName serviceComponent = new ComponentName(
459                        ai.packageName, serviceName);
460                final Intent serviceIntent = new Intent(ChooserTargetService.SERVICE_INTERFACE)
461                        .setComponent(serviceComponent);
462
463                if (DEBUG) {
464                    Log.d(TAG, "queryTargets found target with service " + serviceComponent);
465                }
466
467                try {
468                    final String perm = pm.getServiceInfo(serviceComponent, 0).permission;
469                    if (!ChooserTargetService.BIND_PERMISSION.equals(perm)) {
470                        Log.w(TAG, "ChooserTargetService " + serviceComponent + " does not require"
471                                + " permission " + ChooserTargetService.BIND_PERMISSION
472                                + " - this service will not be queried for ChooserTargets."
473                                + " add android:permission=\""
474                                + ChooserTargetService.BIND_PERMISSION + "\""
475                                + " to the <service> tag for " + serviceComponent
476                                + " in the manifest.");
477                        continue;
478                    }
479                } catch (NameNotFoundException e) {
480                    Log.e(TAG, "Could not look up service " + serviceComponent
481                            + "; component name not found");
482                    continue;
483                }
484
485                final ChooserTargetServiceConnection conn =
486                        new ChooserTargetServiceConnection(this, dri);
487
488                // Explicitly specify Process.myUserHandle instead of calling bindService
489                // to avoid the warning from calling from the system process without an explicit
490                // user handle
491                if (bindServiceAsUser(serviceIntent, conn, BIND_AUTO_CREATE | BIND_NOT_FOREGROUND,
492                        Process.myUserHandle())) {
493                    if (DEBUG) {
494                        Log.d(TAG, "Binding service connection for target " + dri
495                                + " intent " + serviceIntent);
496                    }
497                    mServiceConnections.add(conn);
498                    targetsToQuery++;
499                }
500            }
501            if (targetsToQuery >= QUERY_TARGET_SERVICE_LIMIT) {
502                if (DEBUG) Log.d(TAG, "queryTargets hit query target limit "
503                        + QUERY_TARGET_SERVICE_LIMIT);
504                break;
505            }
506        }
507
508        if (!mServiceConnections.isEmpty()) {
509            if (DEBUG) Log.d(TAG, "queryTargets setting watchdog timer for "
510                    + WATCHDOG_TIMEOUT_MILLIS + "ms");
511            mChooserHandler.sendEmptyMessageDelayed(CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT,
512                    WATCHDOG_TIMEOUT_MILLIS);
513        } else {
514            sendVoiceChoicesIfNeeded();
515        }
516    }
517
518    private String convertServiceName(String packageName, String serviceName) {
519        if (TextUtils.isEmpty(serviceName)) {
520            return null;
521        }
522
523        final String fullName;
524        if (serviceName.startsWith(".")) {
525            // Relative to the app package. Prepend the app package name.
526            fullName = packageName + serviceName;
527        } else if (serviceName.indexOf('.') >= 0) {
528            // Fully qualified package name.
529            fullName = serviceName;
530        } else {
531            fullName = null;
532        }
533        return fullName;
534    }
535
536    void unbindRemainingServices() {
537        if (DEBUG) {
538            Log.d(TAG, "unbindRemainingServices, " + mServiceConnections.size() + " left");
539        }
540        for (int i = 0, N = mServiceConnections.size(); i < N; i++) {
541            final ChooserTargetServiceConnection conn = mServiceConnections.get(i);
542            if (DEBUG) Log.d(TAG, "unbinding " + conn);
543            unbindService(conn);
544            conn.destroy();
545        }
546        mServiceConnections.clear();
547        mChooserHandler.removeMessages(CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT);
548    }
549
550    public void onSetupVoiceInteraction() {
551        // Do nothing. We'll send the voice stuff ourselves.
552    }
553
554    void updateChooserCounts(TargetInfo info, String annotation) {
555        if (info != null) {
556            UsageStatsManager usageStatsManager =
557                    (UsageStatsManager) getSystemService(Context.USAGE_STATS_SERVICE);
558            if (usageStatsManager == null) {
559                if (DEBUG) {
560                    Log.d(TAG, "Can not start UsageStatsManager");
561                }
562                return;
563            }
564            final ResolveInfo ri = info.getResolveInfo();
565            if (ri != null && ri.activityInfo != null) {
566                usageStatsManager.reportChooserSelection(ri.activityInfo.packageName, getUserId(),
567                        annotation, null, info.getResolvedIntent().getAction());
568                mResolverComparator.updateModel(info.getResolvedComponentName());
569                if (DEBUG) {
570                    Log.d(TAG, "ResolveInfo Package is" + ri.activityInfo.packageName);
571                }
572            } else if(DEBUG) {
573                Log.d(TAG, "Can not log Chooser Counts of null ResovleInfo");
574            }
575        }
576    }
577
578    void onRefinementResult(TargetInfo selectedTarget, Intent matchingIntent) {
579        if (mRefinementResultReceiver != null) {
580            mRefinementResultReceiver.destroy();
581            mRefinementResultReceiver = null;
582        }
583        if (selectedTarget == null) {
584            Log.e(TAG, "Refinement result intent did not match any known targets; canceling");
585        } else if (!checkTargetSourceIntent(selectedTarget, matchingIntent)) {
586            Log.e(TAG, "onRefinementResult: Selected target " + selectedTarget
587                    + " cannot match refined source intent " + matchingIntent);
588        } else {
589            TargetInfo clonedTarget = selectedTarget.cloneFilledIn(matchingIntent, 0);
590            if (super.onTargetSelected(clonedTarget, false)) {
591                updateChooserCounts(clonedTarget, mContentType);
592                finish();
593                return;
594            }
595        }
596        onRefinementCanceled();
597    }
598
599    void onRefinementCanceled() {
600        if (mRefinementResultReceiver != null) {
601            mRefinementResultReceiver.destroy();
602            mRefinementResultReceiver = null;
603        }
604        finish();
605    }
606
607    boolean checkTargetSourceIntent(TargetInfo target, Intent matchingIntent) {
608        final List<Intent> targetIntents = target.getAllSourceIntents();
609        for (int i = 0, N = targetIntents.size(); i < N; i++) {
610            final Intent targetIntent = targetIntents.get(i);
611            if (targetIntent.filterEquals(matchingIntent)) {
612                return true;
613            }
614        }
615        return false;
616    }
617
618    void filterServiceTargets(String packageName, List<ChooserTarget> targets) {
619        if (targets == null) {
620            return;
621        }
622
623        final PackageManager pm = getPackageManager();
624        for (int i = targets.size() - 1; i >= 0; i--) {
625            final ChooserTarget target = targets.get(i);
626            final ComponentName targetName = target.getComponentName();
627            if (packageName != null && packageName.equals(targetName.getPackageName())) {
628                // Anything from the original target's package is fine.
629                continue;
630            }
631
632            boolean remove;
633            try {
634                final ActivityInfo ai = pm.getActivityInfo(targetName, 0);
635                remove = !ai.exported || ai.permission != null;
636            } catch (NameNotFoundException e) {
637                Log.e(TAG, "Target " + target + " returned by " + packageName
638                        + " component not found");
639                remove = true;
640            }
641
642            if (remove) {
643                targets.remove(i);
644            }
645        }
646    }
647
648    public class ChooserListController extends ResolverListController {
649        public ChooserListController(Context context,
650                PackageManager pm,
651                Intent targetIntent,
652                String referrerPackageName,
653                int launchedFromUid) {
654            super(context, pm, targetIntent, referrerPackageName, launchedFromUid);
655        }
656
657        @Override
658        boolean isComponentPinned(ComponentName name) {
659            return mPinnedSharedPrefs.getBoolean(name.flattenToString(), false);
660        }
661
662        @Override
663        boolean isComponentFiltered(ComponentName name) {
664            if (mFilteredComponentNames == null) {
665                return false;
666            }
667            for (ComponentName filteredComponentName : mFilteredComponentNames) {
668                if (name.equals(filteredComponentName)) {
669                    return true;
670                }
671            }
672            return false;
673        }
674
675        @Override
676        public float getScore(DisplayResolveInfo target) {
677            if (target == null) {
678                return CALLER_TARGET_SCORE_BOOST;
679            }
680            float score = super.getScore(target);
681            if (target.isPinned()) {
682                score += PINNED_TARGET_SCORE_BOOST;
683            }
684            return score;
685        }
686    }
687
688    @Override
689    public ResolveListAdapter createAdapter(Context context, List<Intent> payloadIntents,
690            Intent[] initialIntents, List<ResolveInfo> rList, int launchedFromUid,
691            boolean filterLastUsed) {
692        final ChooserListAdapter adapter = new ChooserListAdapter(context, payloadIntents,
693                initialIntents, rList, launchedFromUid, filterLastUsed, createListController());
694        return adapter;
695    }
696
697    @VisibleForTesting
698    protected ResolverListController createListController() {
699        return new ChooserListController(
700                this,
701                mPm,
702                getTargetIntent(),
703                getReferrerPackageName(),
704                mLaunchedFromUid);
705    }
706
707    final class ChooserTargetInfo implements TargetInfo {
708        private final DisplayResolveInfo mSourceInfo;
709        private final ResolveInfo mBackupResolveInfo;
710        private final ChooserTarget mChooserTarget;
711        private Drawable mBadgeIcon = null;
712        private CharSequence mBadgeContentDescription;
713        private Drawable mDisplayIcon;
714        private final Intent mFillInIntent;
715        private final int mFillInFlags;
716        private final float mModifiedScore;
717
718        public ChooserTargetInfo(DisplayResolveInfo sourceInfo, ChooserTarget chooserTarget,
719                float modifiedScore) {
720            mSourceInfo = sourceInfo;
721            mChooserTarget = chooserTarget;
722            mModifiedScore = modifiedScore;
723            if (sourceInfo != null) {
724                final ResolveInfo ri = sourceInfo.getResolveInfo();
725                if (ri != null) {
726                    final ActivityInfo ai = ri.activityInfo;
727                    if (ai != null && ai.applicationInfo != null) {
728                        final PackageManager pm = getPackageManager();
729                        mBadgeIcon = pm.getApplicationIcon(ai.applicationInfo);
730                        mBadgeContentDescription = pm.getApplicationLabel(ai.applicationInfo);
731                    }
732                }
733            }
734            final Icon icon = chooserTarget.getIcon();
735            // TODO do this in the background
736            mDisplayIcon = icon != null ? icon.loadDrawable(ChooserActivity.this) : null;
737
738            if (sourceInfo != null) {
739                mBackupResolveInfo = null;
740            } else {
741                mBackupResolveInfo = getPackageManager().resolveActivity(getResolvedIntent(), 0);
742            }
743
744            mFillInIntent = null;
745            mFillInFlags = 0;
746        }
747
748        private ChooserTargetInfo(ChooserTargetInfo other, Intent fillInIntent, int flags) {
749            mSourceInfo = other.mSourceInfo;
750            mBackupResolveInfo = other.mBackupResolveInfo;
751            mChooserTarget = other.mChooserTarget;
752            mBadgeIcon = other.mBadgeIcon;
753            mBadgeContentDescription = other.mBadgeContentDescription;
754            mDisplayIcon = other.mDisplayIcon;
755            mFillInIntent = fillInIntent;
756            mFillInFlags = flags;
757            mModifiedScore = other.mModifiedScore;
758        }
759
760        public float getModifiedScore() {
761            return mModifiedScore;
762        }
763
764        @Override
765        public Intent getResolvedIntent() {
766            if (mSourceInfo != null) {
767                return mSourceInfo.getResolvedIntent();
768            }
769
770            final Intent targetIntent = new Intent(getTargetIntent());
771            targetIntent.setComponent(mChooserTarget.getComponentName());
772            targetIntent.putExtras(mChooserTarget.getIntentExtras());
773            return targetIntent;
774        }
775
776        @Override
777        public ComponentName getResolvedComponentName() {
778            if (mSourceInfo != null) {
779                return mSourceInfo.getResolvedComponentName();
780            } else if (mBackupResolveInfo != null) {
781                return new ComponentName(mBackupResolveInfo.activityInfo.packageName,
782                        mBackupResolveInfo.activityInfo.name);
783            }
784            return null;
785        }
786
787        private Intent getBaseIntentToSend() {
788            Intent result = getResolvedIntent();
789            if (result == null) {
790                Log.e(TAG, "ChooserTargetInfo: no base intent available to send");
791            } else {
792                result = new Intent(result);
793                if (mFillInIntent != null) {
794                    result.fillIn(mFillInIntent, mFillInFlags);
795                }
796                result.fillIn(mReferrerFillInIntent, 0);
797            }
798            return result;
799        }
800
801        @Override
802        public boolean start(Activity activity, Bundle options) {
803            throw new RuntimeException("ChooserTargets should be started as caller.");
804        }
805
806        @Override
807        public boolean startAsCaller(Activity activity, Bundle options, int userId) {
808            final Intent intent = getBaseIntentToSend();
809            if (intent == null) {
810                return false;
811            }
812            intent.setComponent(mChooserTarget.getComponentName());
813            intent.putExtras(mChooserTarget.getIntentExtras());
814
815            // Important: we will ignore the target security checks in ActivityManager
816            // if and only if the ChooserTarget's target package is the same package
817            // where we got the ChooserTargetService that provided it. This lets a
818            // ChooserTargetService provide a non-exported or permission-guarded target
819            // to the chooser for the user to pick.
820            //
821            // If mSourceInfo is null, we got this ChooserTarget from the caller or elsewhere
822            // so we'll obey the caller's normal security checks.
823            final boolean ignoreTargetSecurity = mSourceInfo != null
824                    && mSourceInfo.getResolvedComponentName().getPackageName()
825                    .equals(mChooserTarget.getComponentName().getPackageName());
826            activity.startActivityAsCaller(intent, options, ignoreTargetSecurity, userId);
827            return true;
828        }
829
830        @Override
831        public boolean startAsUser(Activity activity, Bundle options, UserHandle user) {
832            throw new RuntimeException("ChooserTargets should be started as caller.");
833        }
834
835        @Override
836        public ResolveInfo getResolveInfo() {
837            return mSourceInfo != null ? mSourceInfo.getResolveInfo() : mBackupResolveInfo;
838        }
839
840        @Override
841        public CharSequence getDisplayLabel() {
842            return mChooserTarget.getTitle();
843        }
844
845        @Override
846        public CharSequence getExtendedInfo() {
847            // ChooserTargets have badge icons, so we won't show the extended info to disambiguate.
848            return null;
849        }
850
851        @Override
852        public Drawable getDisplayIcon() {
853            return mDisplayIcon;
854        }
855
856        @Override
857        public Drawable getBadgeIcon() {
858            return mBadgeIcon;
859        }
860
861        @Override
862        public CharSequence getBadgeContentDescription() {
863            return mBadgeContentDescription;
864        }
865
866        @Override
867        public TargetInfo cloneFilledIn(Intent fillInIntent, int flags) {
868            return new ChooserTargetInfo(this, fillInIntent, flags);
869        }
870
871        @Override
872        public List<Intent> getAllSourceIntents() {
873            final List<Intent> results = new ArrayList<>();
874            if (mSourceInfo != null) {
875                // We only queried the service for the first one in our sourceinfo.
876                results.add(mSourceInfo.getAllSourceIntents().get(0));
877            }
878            return results;
879        }
880
881        @Override
882        public boolean isPinned() {
883            return mSourceInfo != null ? mSourceInfo.isPinned() : false;
884        }
885    }
886
887    public class ChooserListAdapter extends ResolveListAdapter {
888        public static final int TARGET_BAD = -1;
889        public static final int TARGET_CALLER = 0;
890        public static final int TARGET_SERVICE = 1;
891        public static final int TARGET_STANDARD = 2;
892
893        private static final int MAX_SERVICE_TARGETS = 8;
894        private static final int MAX_TARGETS_PER_SERVICE = 4;
895
896        private final List<ChooserTargetInfo> mServiceTargets = new ArrayList<>();
897        private final List<TargetInfo> mCallerTargets = new ArrayList<>();
898        private boolean mShowServiceTargets;
899
900        private float mLateFee = 1.f;
901
902        private final BaseChooserTargetComparator mBaseTargetComparator
903                = new BaseChooserTargetComparator();
904
905        public ChooserListAdapter(Context context, List<Intent> payloadIntents,
906                Intent[] initialIntents, List<ResolveInfo> rList, int launchedFromUid,
907                boolean filterLastUsed, ResolverListController resolverListController) {
908            // Don't send the initial intents through the shared ResolverActivity path,
909            // we want to separate them into a different section.
910            super(context, payloadIntents, null, rList, launchedFromUid, filterLastUsed,
911                    resolverListController);
912
913            if (initialIntents != null) {
914                final PackageManager pm = getPackageManager();
915                for (int i = 0; i < initialIntents.length; i++) {
916                    final Intent ii = initialIntents[i];
917                    if (ii == null) {
918                        continue;
919                    }
920
921                    // We reimplement Intent#resolveActivityInfo here because if we have an
922                    // implicit intent, we want the ResolveInfo returned by PackageManager
923                    // instead of one we reconstruct ourselves. The ResolveInfo returned might
924                    // have extra metadata and resolvePackageName set and we want to respect that.
925                    ResolveInfo ri = null;
926                    ActivityInfo ai = null;
927                    final ComponentName cn = ii.getComponent();
928                    if (cn != null) {
929                        try {
930                            ai = pm.getActivityInfo(ii.getComponent(), 0);
931                            ri = new ResolveInfo();
932                            ri.activityInfo = ai;
933                        } catch (PackageManager.NameNotFoundException ignored) {
934                            // ai will == null below
935                        }
936                    }
937                    if (ai == null) {
938                        ri = pm.resolveActivity(ii, PackageManager.MATCH_DEFAULT_ONLY);
939                        ai = ri != null ? ri.activityInfo : null;
940                    }
941                    if (ai == null) {
942                        Log.w(TAG, "No activity found for " + ii);
943                        continue;
944                    }
945                    UserManager userManager =
946                            (UserManager) getSystemService(Context.USER_SERVICE);
947                    if (ii instanceof LabeledIntent) {
948                        LabeledIntent li = (LabeledIntent)ii;
949                        ri.resolvePackageName = li.getSourcePackage();
950                        ri.labelRes = li.getLabelResource();
951                        ri.nonLocalizedLabel = li.getNonLocalizedLabel();
952                        ri.icon = li.getIconResource();
953                        ri.iconResourceId = ri.icon;
954                    }
955                    if (userManager.isManagedProfile()) {
956                        ri.noResourceId = true;
957                        ri.icon = 0;
958                    }
959                    mCallerTargets.add(new DisplayResolveInfo(ii, ri,
960                            ri.loadLabel(pm), null, ii));
961                }
962            }
963        }
964
965        @Override
966        public boolean showsExtendedInfo(TargetInfo info) {
967            // We have badges so we don't need this text shown.
968            return false;
969        }
970
971        @Override
972        public boolean isComponentPinned(ComponentName name) {
973            return mPinnedSharedPrefs.getBoolean(name.flattenToString(), false);
974        }
975
976        @Override
977        public View onCreateView(ViewGroup parent) {
978            return mInflater.inflate(
979                    com.android.internal.R.layout.resolve_grid_item, parent, false);
980        }
981
982        @Override
983        public void onListRebuilt() {
984            if (mServiceTargets != null) {
985                pruneServiceTargets();
986            }
987            if (DEBUG) Log.d(TAG, "List built querying services");
988            queryTargetServices(this);
989        }
990
991        @Override
992        public boolean shouldGetResolvedFilter() {
993            return true;
994        }
995
996        @Override
997        public int getCount() {
998            return super.getCount() + getServiceTargetCount() + getCallerTargetCount();
999        }
1000
1001        @Override
1002        public int getUnfilteredCount() {
1003            return super.getUnfilteredCount() + getServiceTargetCount() + getCallerTargetCount();
1004        }
1005
1006        public int getCallerTargetCount() {
1007            return mCallerTargets.size();
1008        }
1009
1010        public int getServiceTargetCount() {
1011            if (!mShowServiceTargets) {
1012                return 0;
1013            }
1014            return Math.min(mServiceTargets.size(), MAX_SERVICE_TARGETS);
1015        }
1016
1017        public int getStandardTargetCount() {
1018            return super.getCount();
1019        }
1020
1021        public int getPositionTargetType(int position) {
1022            int offset = 0;
1023
1024            final int callerTargetCount = getCallerTargetCount();
1025            if (position < callerTargetCount) {
1026                return TARGET_CALLER;
1027            }
1028            offset += callerTargetCount;
1029
1030            final int serviceTargetCount = getServiceTargetCount();
1031            if (position - offset < serviceTargetCount) {
1032                return TARGET_SERVICE;
1033            }
1034            offset += serviceTargetCount;
1035
1036            final int standardTargetCount = super.getCount();
1037            if (position - offset < standardTargetCount) {
1038                return TARGET_STANDARD;
1039            }
1040
1041            return TARGET_BAD;
1042        }
1043
1044        @Override
1045        public TargetInfo getItem(int position) {
1046            return targetInfoForPosition(position, true);
1047        }
1048
1049        @Override
1050        public TargetInfo targetInfoForPosition(int position, boolean filtered) {
1051            int offset = 0;
1052
1053            final int callerTargetCount = getCallerTargetCount();
1054            if (position < callerTargetCount) {
1055                return mCallerTargets.get(position);
1056            }
1057            offset += callerTargetCount;
1058
1059            final int serviceTargetCount = getServiceTargetCount();
1060            if (position - offset < serviceTargetCount) {
1061                return mServiceTargets.get(position - offset);
1062            }
1063            offset += serviceTargetCount;
1064
1065            return filtered ? super.getItem(position - offset)
1066                    : getDisplayInfoAt(position - offset);
1067        }
1068
1069        public void addServiceResults(DisplayResolveInfo origTarget, List<ChooserTarget> targets) {
1070            if (DEBUG) Log.d(TAG, "addServiceResults " + origTarget + ", " + targets.size()
1071                    + " targets");
1072            final float parentScore = getScore(origTarget);
1073            Collections.sort(targets, mBaseTargetComparator);
1074            float lastScore = 0;
1075            for (int i = 0, N = Math.min(targets.size(), MAX_TARGETS_PER_SERVICE); i < N; i++) {
1076                final ChooserTarget target = targets.get(i);
1077                float targetScore = target.getScore();
1078                targetScore *= parentScore;
1079                targetScore *= mLateFee;
1080                if (i > 0 && targetScore >= lastScore) {
1081                    // Apply a decay so that the top app can't crowd out everything else.
1082                    // This incents ChooserTargetServices to define what's truly better.
1083                    targetScore = lastScore * 0.95f;
1084                }
1085                insertServiceTarget(new ChooserTargetInfo(origTarget, target, targetScore));
1086
1087                if (DEBUG) {
1088                    Log.d(TAG, " => " + target.toString() + " score=" + targetScore
1089                            + " base=" + target.getScore()
1090                            + " lastScore=" + lastScore
1091                            + " parentScore=" + parentScore
1092                            + " lateFee=" + mLateFee);
1093                }
1094
1095                lastScore = targetScore;
1096            }
1097
1098            mLateFee *= 0.95f;
1099
1100            notifyDataSetChanged();
1101        }
1102
1103        /**
1104         * Set to true to reveal all service targets at once.
1105         */
1106        public void setShowServiceTargets(boolean show) {
1107            mShowServiceTargets = show;
1108            notifyDataSetChanged();
1109        }
1110
1111        private void insertServiceTarget(ChooserTargetInfo chooserTargetInfo) {
1112            final float newScore = chooserTargetInfo.getModifiedScore();
1113            for (int i = 0, N = mServiceTargets.size(); i < N; i++) {
1114                final ChooserTargetInfo serviceTarget = mServiceTargets.get(i);
1115                if (newScore > serviceTarget.getModifiedScore()) {
1116                    mServiceTargets.add(i, chooserTargetInfo);
1117                    return;
1118                }
1119            }
1120            mServiceTargets.add(chooserTargetInfo);
1121        }
1122
1123        private void pruneServiceTargets() {
1124            if (DEBUG) Log.d(TAG, "pruneServiceTargets");
1125            for (int i = mServiceTargets.size() - 1; i >= 0; i--) {
1126                final ChooserTargetInfo cti = mServiceTargets.get(i);
1127                if (!hasResolvedTarget(cti.getResolveInfo())) {
1128                    if (DEBUG) Log.d(TAG, " => " + i + " " + cti);
1129                    mServiceTargets.remove(i);
1130                }
1131            }
1132        }
1133    }
1134
1135    static class BaseChooserTargetComparator implements Comparator<ChooserTarget> {
1136        @Override
1137        public int compare(ChooserTarget lhs, ChooserTarget rhs) {
1138            // Descending order
1139            return (int) Math.signum(rhs.getScore() - lhs.getScore());
1140        }
1141    }
1142
1143    static class RowScale {
1144        private static final int DURATION = 400;
1145
1146        float mScale;
1147        ChooserRowAdapter mAdapter;
1148        private final ObjectAnimator mAnimator;
1149
1150        public static final FloatProperty<RowScale> PROPERTY =
1151                new FloatProperty<RowScale>("scale") {
1152            @Override
1153            public void setValue(RowScale object, float value) {
1154                object.mScale = value;
1155                object.mAdapter.notifyDataSetChanged();
1156            }
1157
1158            @Override
1159            public Float get(RowScale object) {
1160                return object.mScale;
1161            }
1162        };
1163
1164        public RowScale(@NonNull ChooserRowAdapter adapter, float from, float to) {
1165            mAdapter = adapter;
1166            mScale = from;
1167            if (from == to) {
1168                mAnimator = null;
1169                return;
1170            }
1171
1172            mAnimator = ObjectAnimator.ofFloat(this, PROPERTY, from, to).setDuration(DURATION);
1173        }
1174
1175        public RowScale setInterpolator(Interpolator interpolator) {
1176            if (mAnimator != null) {
1177                mAnimator.setInterpolator(interpolator);
1178            }
1179            return this;
1180        }
1181
1182        public float get() {
1183            return mScale;
1184        }
1185
1186        public void startAnimation() {
1187            if (mAnimator != null) {
1188                mAnimator.start();
1189            }
1190        }
1191
1192        public void cancelAnimation() {
1193            if (mAnimator != null) {
1194                mAnimator.cancel();
1195            }
1196        }
1197    }
1198
1199    class ChooserRowAdapter extends BaseAdapter {
1200        private ChooserListAdapter mChooserListAdapter;
1201        private final LayoutInflater mLayoutInflater;
1202        private final int mColumnCount = 4;
1203        private RowScale[] mServiceTargetScale;
1204        private final Interpolator mInterpolator;
1205
1206        public ChooserRowAdapter(ChooserListAdapter wrappedAdapter) {
1207            mChooserListAdapter = wrappedAdapter;
1208            mLayoutInflater = LayoutInflater.from(ChooserActivity.this);
1209
1210            mInterpolator = AnimationUtils.loadInterpolator(ChooserActivity.this,
1211                    android.R.interpolator.decelerate_quint);
1212
1213            wrappedAdapter.registerDataSetObserver(new DataSetObserver() {
1214                @Override
1215                public void onChanged() {
1216                    super.onChanged();
1217                    final int rcount = getServiceTargetRowCount();
1218                    if (mServiceTargetScale == null
1219                            || mServiceTargetScale.length != rcount) {
1220                        RowScale[] old = mServiceTargetScale;
1221                        int oldRCount = old != null ? old.length : 0;
1222                        mServiceTargetScale = new RowScale[rcount];
1223                        if (old != null && rcount > 0) {
1224                            System.arraycopy(old, 0, mServiceTargetScale, 0,
1225                                    Math.min(old.length, rcount));
1226                        }
1227
1228                        for (int i = rcount; i < oldRCount; i++) {
1229                            old[i].cancelAnimation();
1230                        }
1231
1232                        for (int i = oldRCount; i < rcount; i++) {
1233                            final RowScale rs = new RowScale(ChooserRowAdapter.this, 0.f, 1.f)
1234                                    .setInterpolator(mInterpolator);
1235                            mServiceTargetScale[i] = rs;
1236                        }
1237
1238                        // Start the animations in a separate loop.
1239                        // The process of starting animations will result in
1240                        // binding views to set up initial values, and we must
1241                        // have ALL of the new RowScale objects created above before
1242                        // we get started.
1243                        for (int i = oldRCount; i < rcount; i++) {
1244                            mServiceTargetScale[i].startAnimation();
1245                        }
1246                    }
1247
1248                    notifyDataSetChanged();
1249                }
1250
1251                @Override
1252                public void onInvalidated() {
1253                    super.onInvalidated();
1254                    notifyDataSetInvalidated();
1255                    if (mServiceTargetScale != null) {
1256                        for (RowScale rs : mServiceTargetScale) {
1257                            rs.cancelAnimation();
1258                        }
1259                    }
1260                }
1261            });
1262        }
1263
1264        private float getRowScale(int rowPosition) {
1265            final int start = getCallerTargetRowCount();
1266            final int end = start + getServiceTargetRowCount();
1267            if (rowPosition >= start && rowPosition < end) {
1268                return mServiceTargetScale[rowPosition - start].get();
1269            }
1270            return 1.f;
1271        }
1272
1273        @Override
1274        public int getCount() {
1275            return (int) (
1276                    getCallerTargetRowCount()
1277                    + getServiceTargetRowCount()
1278                    + Math.ceil((float) mChooserListAdapter.getStandardTargetCount() / mColumnCount)
1279            );
1280        }
1281
1282        public int getCallerTargetRowCount() {
1283            return (int) Math.ceil(
1284                    (float) mChooserListAdapter.getCallerTargetCount() / mColumnCount);
1285        }
1286
1287        public int getServiceTargetRowCount() {
1288            return (int) Math.ceil(
1289                    (float) mChooserListAdapter.getServiceTargetCount() / mColumnCount);
1290        }
1291
1292        @Override
1293        public Object getItem(int position) {
1294            // We have nothing useful to return here.
1295            return position;
1296        }
1297
1298        @Override
1299        public long getItemId(int position) {
1300            return position;
1301        }
1302
1303        @Override
1304        public View getView(int position, View convertView, ViewGroup parent) {
1305            final RowViewHolder holder;
1306            if (convertView == null) {
1307                holder = createViewHolder(parent);
1308            } else {
1309                holder = (RowViewHolder) convertView.getTag();
1310            }
1311            bindViewHolder(position, holder);
1312
1313            return holder.row;
1314        }
1315
1316        RowViewHolder createViewHolder(ViewGroup parent) {
1317            final ViewGroup row = (ViewGroup) mLayoutInflater.inflate(R.layout.chooser_row,
1318                    parent, false);
1319            final RowViewHolder holder = new RowViewHolder(row, mColumnCount);
1320            final int spec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
1321
1322            for (int i = 0; i < mColumnCount; i++) {
1323                final View v = mChooserListAdapter.createView(row);
1324                final int column = i;
1325                v.setOnClickListener(new OnClickListener() {
1326                    @Override
1327                    public void onClick(View v) {
1328                        startSelected(holder.itemIndices[column], false, true);
1329                    }
1330                });
1331                v.setOnLongClickListener(new OnLongClickListener() {
1332                    @Override
1333                    public boolean onLongClick(View v) {
1334                        showTargetDetails(
1335                                mChooserListAdapter.resolveInfoForPosition(
1336                                        holder.itemIndices[column], true));
1337                        return true;
1338                    }
1339                });
1340                row.addView(v);
1341                holder.cells[i] = v;
1342
1343                // Force height to be a given so we don't have visual disruption during scaling.
1344                LayoutParams lp = v.getLayoutParams();
1345                v.measure(spec, spec);
1346                if (lp == null) {
1347                    lp = new LayoutParams(LayoutParams.MATCH_PARENT, v.getMeasuredHeight());
1348                    row.setLayoutParams(lp);
1349                } else {
1350                    lp.height = v.getMeasuredHeight();
1351                }
1352            }
1353
1354            // Pre-measure so we can scale later.
1355            holder.measure();
1356            LayoutParams lp = row.getLayoutParams();
1357            if (lp == null) {
1358                lp = new LayoutParams(LayoutParams.MATCH_PARENT, holder.measuredRowHeight);
1359                row.setLayoutParams(lp);
1360            } else {
1361                lp.height = holder.measuredRowHeight;
1362            }
1363            row.setTag(holder);
1364            return holder;
1365        }
1366
1367        void bindViewHolder(int rowPosition, RowViewHolder holder) {
1368            final int start = getFirstRowPosition(rowPosition);
1369            final int startType = mChooserListAdapter.getPositionTargetType(start);
1370
1371            int end = start + mColumnCount - 1;
1372            while (mChooserListAdapter.getPositionTargetType(end) != startType && end >= start) {
1373                end--;
1374            }
1375
1376            if (startType == ChooserListAdapter.TARGET_SERVICE) {
1377                holder.row.setBackgroundColor(
1378                        getColor(R.color.chooser_service_row_background_color));
1379            } else {
1380                holder.row.setBackgroundColor(Color.TRANSPARENT);
1381            }
1382
1383            final int oldHeight = holder.row.getLayoutParams().height;
1384            holder.row.getLayoutParams().height = Math.max(1,
1385                    (int) (holder.measuredRowHeight * getRowScale(rowPosition)));
1386            if (holder.row.getLayoutParams().height != oldHeight) {
1387                holder.row.requestLayout();
1388            }
1389
1390            for (int i = 0; i < mColumnCount; i++) {
1391                final View v = holder.cells[i];
1392                if (start + i <= end) {
1393                    v.setVisibility(View.VISIBLE);
1394                    holder.itemIndices[i] = start + i;
1395                    mChooserListAdapter.bindView(holder.itemIndices[i], v);
1396                } else {
1397                    v.setVisibility(View.GONE);
1398                }
1399            }
1400        }
1401
1402        int getFirstRowPosition(int row) {
1403            final int callerCount = mChooserListAdapter.getCallerTargetCount();
1404            final int callerRows = (int) Math.ceil((float) callerCount / mColumnCount);
1405
1406            if (row < callerRows) {
1407                return row * mColumnCount;
1408            }
1409
1410            final int serviceCount = mChooserListAdapter.getServiceTargetCount();
1411            final int serviceRows = (int) Math.ceil((float) serviceCount / mColumnCount);
1412
1413            if (row < callerRows + serviceRows) {
1414                return callerCount + (row - callerRows) * mColumnCount;
1415            }
1416
1417            return callerCount + serviceCount
1418                    + (row - callerRows - serviceRows) * mColumnCount;
1419        }
1420    }
1421
1422    static class RowViewHolder {
1423        final View[] cells;
1424        final ViewGroup row;
1425        int measuredRowHeight;
1426        int[] itemIndices;
1427
1428        public RowViewHolder(ViewGroup row, int cellCount) {
1429            this.row = row;
1430            this.cells = new View[cellCount];
1431            this.itemIndices = new int[cellCount];
1432        }
1433
1434        public void measure() {
1435            final int spec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
1436            row.measure(spec, spec);
1437            measuredRowHeight = row.getMeasuredHeight();
1438        }
1439    }
1440
1441    static class ChooserTargetServiceConnection implements ServiceConnection {
1442        private DisplayResolveInfo mOriginalTarget;
1443        private ComponentName mConnectedComponent;
1444        private ChooserActivity mChooserActivity;
1445        private final Object mLock = new Object();
1446
1447        private final IChooserTargetResult mChooserTargetResult = new IChooserTargetResult.Stub() {
1448            @Override
1449            public void sendResult(List<ChooserTarget> targets) throws RemoteException {
1450                synchronized (mLock) {
1451                    if (mChooserActivity == null) {
1452                        Log.e(TAG, "destroyed ChooserTargetServiceConnection received result from "
1453                                + mConnectedComponent + "; ignoring...");
1454                        return;
1455                    }
1456                    mChooserActivity.filterServiceTargets(
1457                            mOriginalTarget.getResolveInfo().activityInfo.packageName, targets);
1458                    final Message msg = Message.obtain();
1459                    msg.what = CHOOSER_TARGET_SERVICE_RESULT;
1460                    msg.obj = new ServiceResultInfo(mOriginalTarget, targets,
1461                            ChooserTargetServiceConnection.this);
1462                    mChooserActivity.mChooserHandler.sendMessage(msg);
1463                }
1464            }
1465        };
1466
1467        public ChooserTargetServiceConnection(ChooserActivity chooserActivity,
1468                DisplayResolveInfo dri) {
1469            mChooserActivity = chooserActivity;
1470            mOriginalTarget = dri;
1471        }
1472
1473        @Override
1474        public void onServiceConnected(ComponentName name, IBinder service) {
1475            if (DEBUG) Log.d(TAG, "onServiceConnected: " + name);
1476            synchronized (mLock) {
1477                if (mChooserActivity == null) {
1478                    Log.e(TAG, "destroyed ChooserTargetServiceConnection got onServiceConnected");
1479                    return;
1480                }
1481
1482                final IChooserTargetService icts = IChooserTargetService.Stub.asInterface(service);
1483                try {
1484                    icts.getChooserTargets(mOriginalTarget.getResolvedComponentName(),
1485                            mOriginalTarget.getResolveInfo().filter, mChooserTargetResult);
1486                } catch (RemoteException e) {
1487                    Log.e(TAG, "Querying ChooserTargetService " + name + " failed.", e);
1488                    mChooserActivity.unbindService(this);
1489                    destroy();
1490                    mChooserActivity.mServiceConnections.remove(this);
1491                }
1492            }
1493        }
1494
1495        @Override
1496        public void onServiceDisconnected(ComponentName name) {
1497            if (DEBUG) Log.d(TAG, "onServiceDisconnected: " + name);
1498            synchronized (mLock) {
1499                if (mChooserActivity == null) {
1500                    Log.e(TAG,
1501                            "destroyed ChooserTargetServiceConnection got onServiceDisconnected");
1502                    return;
1503                }
1504
1505                mChooserActivity.unbindService(this);
1506                destroy();
1507                mChooserActivity.mServiceConnections.remove(this);
1508                if (mChooserActivity.mServiceConnections.isEmpty()) {
1509                    mChooserActivity.mChooserHandler.removeMessages(
1510                            CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT);
1511                    mChooserActivity.sendVoiceChoicesIfNeeded();
1512                }
1513                mConnectedComponent = null;
1514            }
1515        }
1516
1517        public void destroy() {
1518            synchronized (mLock) {
1519                mChooserActivity = null;
1520                mOriginalTarget = null;
1521            }
1522        }
1523
1524        @Override
1525        public String toString() {
1526            return "ChooserTargetServiceConnection{service="
1527                    + mConnectedComponent + ", activity="
1528                    + (mOriginalTarget != null
1529                    ? mOriginalTarget.getResolveInfo().activityInfo.toString()
1530                    : "<connection destroyed>") + "}";
1531        }
1532    }
1533
1534    static class ServiceResultInfo {
1535        public final DisplayResolveInfo originalTarget;
1536        public final List<ChooserTarget> resultTargets;
1537        public final ChooserTargetServiceConnection connection;
1538
1539        public ServiceResultInfo(DisplayResolveInfo ot, List<ChooserTarget> rt,
1540                ChooserTargetServiceConnection c) {
1541            originalTarget = ot;
1542            resultTargets = rt;
1543            connection = c;
1544        }
1545    }
1546
1547    static class RefinementResultReceiver extends ResultReceiver {
1548        private ChooserActivity mChooserActivity;
1549        private TargetInfo mSelectedTarget;
1550
1551        public RefinementResultReceiver(ChooserActivity host, TargetInfo target,
1552                Handler handler) {
1553            super(handler);
1554            mChooserActivity = host;
1555            mSelectedTarget = target;
1556        }
1557
1558        @Override
1559        protected void onReceiveResult(int resultCode, Bundle resultData) {
1560            if (mChooserActivity == null) {
1561                Log.e(TAG, "Destroyed RefinementResultReceiver received a result");
1562                return;
1563            }
1564            if (resultData == null) {
1565                Log.e(TAG, "RefinementResultReceiver received null resultData");
1566                return;
1567            }
1568
1569            switch (resultCode) {
1570                case RESULT_CANCELED:
1571                    mChooserActivity.onRefinementCanceled();
1572                    break;
1573                case RESULT_OK:
1574                    Parcelable intentParcelable = resultData.getParcelable(Intent.EXTRA_INTENT);
1575                    if (intentParcelable instanceof Intent) {
1576                        mChooserActivity.onRefinementResult(mSelectedTarget,
1577                                (Intent) intentParcelable);
1578                    } else {
1579                        Log.e(TAG, "RefinementResultReceiver received RESULT_OK but no Intent"
1580                                + " in resultData with key Intent.EXTRA_INTENT");
1581                    }
1582                    break;
1583                default:
1584                    Log.w(TAG, "Unknown result code " + resultCode
1585                            + " sent to RefinementResultReceiver");
1586                    break;
1587            }
1588        }
1589
1590        public void destroy() {
1591            mChooserActivity = null;
1592            mSelectedTarget = null;
1593        }
1594    }
1595
1596    class OffsetDataSetObserver extends DataSetObserver {
1597        private final AbsListView mListView;
1598        private int mCachedViewType = -1;
1599        private View mCachedView;
1600
1601        public OffsetDataSetObserver(AbsListView listView) {
1602            mListView = listView;
1603        }
1604
1605        @Override
1606        public void onChanged() {
1607            if (mResolverDrawerLayout == null) {
1608                return;
1609            }
1610
1611            final int chooserTargetRows = mChooserRowAdapter.getServiceTargetRowCount();
1612            int offset = 0;
1613            for (int i = 0; i < chooserTargetRows; i++)  {
1614                final int pos = mChooserRowAdapter.getCallerTargetRowCount() + i;
1615                final int vt = mChooserRowAdapter.getItemViewType(pos);
1616                if (vt != mCachedViewType) {
1617                    mCachedView = null;
1618                }
1619                final View v = mChooserRowAdapter.getView(pos, mCachedView, mListView);
1620                int height = ((RowViewHolder) (v.getTag())).measuredRowHeight;
1621
1622                offset += (int) (height * mChooserRowAdapter.getRowScale(pos));
1623
1624                if (vt >= 0) {
1625                    mCachedViewType = vt;
1626                    mCachedView = v;
1627                } else {
1628                    mCachedViewType = -1;
1629                }
1630            }
1631
1632            mResolverDrawerLayout.setCollapsibleHeightReserved(offset);
1633        }
1634    }
1635}
1636