ChooserActivity.java revision 11af18783d32f8646428500a0ff3a2a57a77bf95 
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.content.ComponentName;
23import android.content.Context;
24import android.content.Intent;
25import android.content.IntentSender;
26import android.content.IntentSender.SendIntentException;
27import android.content.ServiceConnection;
28import android.content.pm.ActivityInfo;
29import android.content.pm.LabeledIntent;
30import android.content.pm.PackageManager;
31import android.content.pm.PackageManager.NameNotFoundException;
32import android.content.pm.ResolveInfo;
33import android.database.DataSetObserver;
34import android.graphics.Color;
35import android.graphics.drawable.Drawable;
36import android.graphics.drawable.Icon;
37import android.os.Bundle;
38import android.os.Handler;
39import android.os.IBinder;
40import android.os.Message;
41import android.os.Parcelable;
42import android.os.RemoteException;
43import android.os.ResultReceiver;
44import android.os.UserHandle;
45import android.os.UserManager;
46import android.provider.DocumentsContract;
47import android.service.chooser.ChooserTarget;
48import android.service.chooser.ChooserTargetService;
49import android.service.chooser.IChooserTargetResult;
50import android.service.chooser.IChooserTargetService;
51import android.text.TextUtils;
52import android.util.FloatProperty;
53import android.util.Log;
54import android.util.Slog;
55import android.view.LayoutInflater;
56import android.view.View;
57import android.view.View.MeasureSpec;
58import android.view.View.OnClickListener;
59import android.view.View.OnLongClickListener;
60import android.view.ViewGroup;
61import android.view.ViewGroup.LayoutParams;
62import android.view.animation.AnimationUtils;
63import android.view.animation.Interpolator;
64import android.widget.AbsListView;
65import android.widget.BaseAdapter;
66import android.widget.ListView;
67import com.android.internal.R;
68import com.android.internal.logging.MetricsLogger;
69
70import java.util.ArrayList;
71import java.util.Collections;
72import java.util.Comparator;
73import java.util.List;
74
75public class ChooserActivity extends ResolverActivity {
76    private static final String TAG = "ChooserActivity";
77
78    private static final boolean DEBUG = false;
79
80    private static final int QUERY_TARGET_SERVICE_LIMIT = 5;
81    private static final int WATCHDOG_TIMEOUT_MILLIS = 5000;
82
83    private Bundle mReplacementExtras;
84    private IntentSender mChosenComponentSender;
85    private IntentSender mRefinementIntentSender;
86    private RefinementResultReceiver mRefinementResultReceiver;
87
88    private Intent mReferrerFillInIntent;
89
90    private ChooserListAdapter mChooserListAdapter;
91    private ChooserRowAdapter mChooserRowAdapter;
92
93    private final List<ChooserTargetServiceConnection> mServiceConnections = new ArrayList<>();
94
95    private static final int CHOOSER_TARGET_SERVICE_RESULT = 1;
96    private static final int CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT = 2;
97
98    private final Handler mChooserHandler = new Handler() {
99        @Override
100        public void handleMessage(Message msg) {
101            switch (msg.what) {
102                case CHOOSER_TARGET_SERVICE_RESULT:
103                    if (DEBUG) Log.d(TAG, "CHOOSER_TARGET_SERVICE_RESULT");
104                    if (isDestroyed()) break;
105                    final ServiceResultInfo sri = (ServiceResultInfo) msg.obj;
106                    if (!mServiceConnections.contains(sri.connection)) {
107                        Log.w(TAG, "ChooserTargetServiceConnection " + sri.connection
108                                + " returned after being removed from active connections."
109                                + " Have you considered returning results faster?");
110                        break;
111                    }
112                    if (sri.resultTargets != null) {
113                        mChooserListAdapter.addServiceResults(sri.originalTarget,
114                                sri.resultTargets);
115                    }
116                    unbindService(sri.connection);
117                    sri.connection.destroy();
118                    mServiceConnections.remove(sri.connection);
119                    if (mServiceConnections.isEmpty()) {
120                        mChooserHandler.removeMessages(CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT);
121                        sendVoiceChoicesIfNeeded();
122                    }
123                    break;
124
125                case CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT:
126                    if (DEBUG) {
127                        Log.d(TAG, "CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT; unbinding services");
128                    }
129                    unbindRemainingServices();
130                    sendVoiceChoicesIfNeeded();
131                    break;
132
133                default:
134                    super.handleMessage(msg);
135            }
136        }
137    };
138
139    @Override
140    protected void onCreate(Bundle savedInstanceState) {
141        Intent intent = getIntent();
142        Parcelable targetParcelable = intent.getParcelableExtra(Intent.EXTRA_INTENT);
143        if (!(targetParcelable instanceof Intent)) {
144            Log.w("ChooserActivity", "Target is not an intent: " + targetParcelable);
145            finish();
146            super.onCreate(null);
147            return;
148        }
149        Intent target = (Intent) targetParcelable;
150        if (target != null) {
151            modifyTargetIntent(target);
152        }
153        Parcelable[] targetsParcelable
154                = intent.getParcelableArrayExtra(Intent.EXTRA_ALTERNATE_INTENTS);
155        if (targetsParcelable != null) {
156            final boolean offset = target == null;
157            Intent[] additionalTargets =
158                    new Intent[offset ? targetsParcelable.length - 1 : targetsParcelable.length];
159            for (int i = 0; i < targetsParcelable.length; i++) {
160                if (!(targetsParcelable[i] instanceof Intent)) {
161                    Log.w(TAG, "EXTRA_ALTERNATE_INTENTS array entry #" + i + " is not an Intent: "
162                            + targetsParcelable[i]);
163                    finish();
164                    super.onCreate(null);
165                    return;
166                }
167                final Intent additionalTarget = (Intent) targetsParcelable[i];
168                if (i == 0 && target == null) {
169                    target = additionalTarget;
170                    modifyTargetIntent(target);
171                } else {
172                    additionalTargets[offset ? i - 1 : i] = additionalTarget;
173                    modifyTargetIntent(additionalTarget);
174                }
175            }
176            setAdditionalTargets(additionalTargets);
177        }
178
179        mReplacementExtras = intent.getBundleExtra(Intent.EXTRA_REPLACEMENT_EXTRAS);
180        CharSequence title = intent.getCharSequenceExtra(Intent.EXTRA_TITLE);
181        int defaultTitleRes = 0;
182        if (title == null) {
183            defaultTitleRes = com.android.internal.R.string.chooseActivity;
184        }
185        Parcelable[] pa = intent.getParcelableArrayExtra(Intent.EXTRA_INITIAL_INTENTS);
186        Intent[] initialIntents = null;
187        if (pa != null) {
188            initialIntents = new Intent[pa.length];
189            for (int i=0; i<pa.length; i++) {
190                if (!(pa[i] instanceof Intent)) {
191                    Log.w(TAG, "Initial intent #" + i + " not an Intent: " + pa[i]);
192                    finish();
193                    super.onCreate(null);
194                    return;
195                }
196                final Intent in = (Intent) pa[i];
197                modifyTargetIntent(in);
198                initialIntents[i] = in;
199            }
200        }
201
202        mReferrerFillInIntent = new Intent().putExtra(Intent.EXTRA_REFERRER, getReferrer());
203
204        mChosenComponentSender = intent.getParcelableExtra(
205                Intent.EXTRA_CHOSEN_COMPONENT_INTENT_SENDER);
206        mRefinementIntentSender = intent.getParcelableExtra(
207                Intent.EXTRA_CHOOSER_REFINEMENT_INTENT_SENDER);
208        setSafeForwardingMode(true);
209        super.onCreate(savedInstanceState, target, title, defaultTitleRes, initialIntents,
210                null, false);
211
212        MetricsLogger.action(this, MetricsLogger.ACTION_ACTIVITY_CHOOSER_SHOWN);
213    }
214
215    @Override
216    protected void onDestroy() {
217        super.onDestroy();
218        if (mRefinementResultReceiver != null) {
219            mRefinementResultReceiver.destroy();
220            mRefinementResultReceiver = null;
221        }
222        unbindRemainingServices();
223        mChooserHandler.removeMessages(CHOOSER_TARGET_SERVICE_RESULT);
224    }
225
226    @Override
227    public Intent getReplacementIntent(ActivityInfo aInfo, Intent defIntent) {
228        Intent result = defIntent;
229        if (mReplacementExtras != null) {
230            final Bundle replExtras = mReplacementExtras.getBundle(aInfo.packageName);
231            if (replExtras != null) {
232                result = new Intent(defIntent);
233                result.putExtras(replExtras);
234            }
235        }
236        if (aInfo.name.equals(IntentForwarderActivity.FORWARD_INTENT_TO_USER_OWNER)
237                || aInfo.name.equals(IntentForwarderActivity.FORWARD_INTENT_TO_MANAGED_PROFILE)) {
238            result = Intent.createChooser(result,
239                    getIntent().getCharSequenceExtra(Intent.EXTRA_TITLE));
240        }
241        return result;
242    }
243
244    @Override
245    void onActivityStarted(TargetInfo cti) {
246        if (mChosenComponentSender != null) {
247            final ComponentName target = cti.getResolvedComponentName();
248            if (target != null) {
249                final Intent fillIn = new Intent().putExtra(Intent.EXTRA_CHOSEN_COMPONENT, target);
250                try {
251                    mChosenComponentSender.sendIntent(this, Activity.RESULT_OK, fillIn, null, null);
252                } catch (IntentSender.SendIntentException e) {
253                    Slog.e(TAG, "Unable to launch supplied IntentSender to report "
254                            + "the chosen component: " + e);
255                }
256            }
257        }
258    }
259
260    @Override
261    void onPrepareAdapterView(AbsListView adapterView, ResolveListAdapter adapter,
262            boolean alwaysUseOption) {
263        final ListView listView = adapterView instanceof ListView ? (ListView) adapterView : null;
264        mChooserListAdapter = (ChooserListAdapter) adapter;
265        mChooserRowAdapter = new ChooserRowAdapter(mChooserListAdapter);
266        mChooserRowAdapter.registerDataSetObserver(new OffsetDataSetObserver(adapterView));
267        adapterView.setAdapter(mChooserRowAdapter);
268        if (listView != null) {
269            listView.setItemsCanFocus(true);
270        }
271    }
272
273    @Override
274    int getLayoutResource() {
275        return R.layout.chooser_grid;
276    }
277
278    @Override
279    boolean shouldGetActivityMetadata() {
280        return true;
281    }
282
283    @Override
284    boolean shouldAutoLaunchSingleChoice(TargetInfo target) {
285        final Intent intent = target.getResolvedIntent();
286        final ResolveInfo resolve = target.getResolveInfo();
287
288        // When GET_CONTENT is handled by the DocumentsUI system component,
289        // we're okay automatically launching it, since it offers it's own
290        // intent disambiguation UI.
291        if (intent != null && Intent.ACTION_GET_CONTENT.equals(intent.getAction())
292                && resolve != null && resolve.priority > 0
293                && resolve.activityInfo != null && DocumentsContract.PACKAGE_DOCUMENTS_UI
294                        .equals(resolve.activityInfo.packageName)) {
295            return true;
296        }
297
298        return false;
299    }
300
301    private void modifyTargetIntent(Intent in) {
302        final String action = in.getAction();
303        if (Intent.ACTION_SEND.equals(action) ||
304                Intent.ACTION_SEND_MULTIPLE.equals(action)) {
305            in.addFlags(Intent.FLAG_ACTIVITY_NEW_DOCUMENT |
306                    Intent.FLAG_ACTIVITY_MULTIPLE_TASK);
307        }
308    }
309
310    @Override
311    protected boolean onTargetSelected(TargetInfo target, boolean alwaysCheck) {
312        if (mRefinementIntentSender != null) {
313            final Intent fillIn = new Intent();
314            final List<Intent> sourceIntents = target.getAllSourceIntents();
315            if (!sourceIntents.isEmpty()) {
316                fillIn.putExtra(Intent.EXTRA_INTENT, sourceIntents.get(0));
317                if (sourceIntents.size() > 1) {
318                    final Intent[] alts = new Intent[sourceIntents.size() - 1];
319                    for (int i = 1, N = sourceIntents.size(); i < N; i++) {
320                        alts[i - 1] = sourceIntents.get(i);
321                    }
322                    fillIn.putExtra(Intent.EXTRA_ALTERNATE_INTENTS, alts);
323                }
324                if (mRefinementResultReceiver != null) {
325                    mRefinementResultReceiver.destroy();
326                }
327                mRefinementResultReceiver = new RefinementResultReceiver(this, target, null);
328                fillIn.putExtra(Intent.EXTRA_RESULT_RECEIVER,
329                        mRefinementResultReceiver);
330                try {
331                    mRefinementIntentSender.sendIntent(this, 0, fillIn, null, null);
332                    return false;
333                } catch (SendIntentException e) {
334                    Log.e(TAG, "Refinement IntentSender failed to send", e);
335                }
336            }
337        }
338        return super.onTargetSelected(target, alwaysCheck);
339    }
340
341    @Override
342    void startSelected(int which, boolean always, boolean filtered) {
343        super.startSelected(which, always, filtered);
344
345        if (mChooserListAdapter != null) {
346            // Log the index of which type of target the user picked.
347            // Lower values mean the ranking was better.
348            int cat = 0;
349            int value = which;
350            switch (mChooserListAdapter.getPositionTargetType(which)) {
351                case ChooserListAdapter.TARGET_CALLER:
352                    cat = MetricsLogger.ACTION_ACTIVITY_CHOOSER_PICKED_APP_TARGET;
353                    break;
354                case ChooserListAdapter.TARGET_SERVICE:
355                    cat = MetricsLogger.ACTION_ACTIVITY_CHOOSER_PICKED_SERVICE_TARGET;
356                    value -= mChooserListAdapter.getCallerTargetCount();
357                    break;
358                case ChooserListAdapter.TARGET_STANDARD:
359                    cat = MetricsLogger.ACTION_ACTIVITY_CHOOSER_PICKED_STANDARD_TARGET;
360                    value -= mChooserListAdapter.getCallerTargetCount()
361                            + mChooserListAdapter.getServiceTargetCount();
362                    break;
363            }
364
365            if (cat != 0) {
366                MetricsLogger.action(this, cat, value);
367            }
368        }
369    }
370
371    void queryTargetServices(ChooserListAdapter adapter) {
372        final PackageManager pm = getPackageManager();
373        int targetsToQuery = 0;
374        for (int i = 0, N = adapter.getDisplayResolveInfoCount(); i < N; i++) {
375            final DisplayResolveInfo dri = adapter.getDisplayResolveInfo(i);
376            final ActivityInfo ai = dri.getResolveInfo().activityInfo;
377            final Bundle md = ai.metaData;
378            final String serviceName = md != null ? convertServiceName(ai.packageName,
379                    md.getString(ChooserTargetService.META_DATA_NAME)) : null;
380            if (serviceName != null) {
381                final ComponentName serviceComponent = new ComponentName(
382                        ai.packageName, serviceName);
383                final Intent serviceIntent = new Intent(ChooserTargetService.SERVICE_INTERFACE)
384                        .setComponent(serviceComponent);
385
386                if (DEBUG) {
387                    Log.d(TAG, "queryTargets found target with service " + serviceComponent);
388                }
389
390                try {
391                    final String perm = pm.getServiceInfo(serviceComponent, 0).permission;
392                    if (!ChooserTargetService.BIND_PERMISSION.equals(perm)) {
393                        Log.w(TAG, "ChooserTargetService " + serviceComponent + " does not require"
394                                + " permission " + ChooserTargetService.BIND_PERMISSION
395                                + " - this service will not be queried for ChooserTargets."
396                                + " add android:permission=\""
397                                + ChooserTargetService.BIND_PERMISSION + "\""
398                                + " to the <service> tag for " + serviceComponent
399                                + " in the manifest.");
400                        continue;
401                    }
402                } catch (NameNotFoundException e) {
403                    Log.e(TAG, "Could not look up service " + serviceComponent, e);
404                    continue;
405                }
406
407                final ChooserTargetServiceConnection conn =
408                        new ChooserTargetServiceConnection(this, dri);
409                if (bindServiceAsUser(serviceIntent, conn, BIND_AUTO_CREATE | BIND_NOT_FOREGROUND,
410                        UserHandle.CURRENT)) {
411                    if (DEBUG) {
412                        Log.d(TAG, "Binding service connection for target " + dri
413                                + " intent " + serviceIntent);
414                    }
415                    mServiceConnections.add(conn);
416                    targetsToQuery++;
417                }
418            }
419            if (targetsToQuery >= QUERY_TARGET_SERVICE_LIMIT) {
420                if (DEBUG) Log.d(TAG, "queryTargets hit query target limit "
421                        + QUERY_TARGET_SERVICE_LIMIT);
422                break;
423            }
424        }
425
426        if (!mServiceConnections.isEmpty()) {
427            if (DEBUG) Log.d(TAG, "queryTargets setting watchdog timer for "
428                    + WATCHDOG_TIMEOUT_MILLIS + "ms");
429            mChooserHandler.sendEmptyMessageDelayed(CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT,
430                    WATCHDOG_TIMEOUT_MILLIS);
431        } else {
432            sendVoiceChoicesIfNeeded();
433        }
434    }
435
436    private String convertServiceName(String packageName, String serviceName) {
437        if (TextUtils.isEmpty(serviceName)) {
438            return null;
439        }
440
441        final String fullName;
442        if (serviceName.startsWith(".")) {
443            // Relative to the app package. Prepend the app package name.
444            fullName = packageName + serviceName;
445        } else if (serviceName.indexOf('.') >= 0) {
446            // Fully qualified package name.
447            fullName = serviceName;
448        } else {
449            fullName = null;
450        }
451        return fullName;
452    }
453
454    void unbindRemainingServices() {
455        if (DEBUG) {
456            Log.d(TAG, "unbindRemainingServices, " + mServiceConnections.size() + " left");
457        }
458        for (int i = 0, N = mServiceConnections.size(); i < N; i++) {
459            final ChooserTargetServiceConnection conn = mServiceConnections.get(i);
460            if (DEBUG) Log.d(TAG, "unbinding " + conn);
461            unbindService(conn);
462            conn.destroy();
463        }
464        mServiceConnections.clear();
465        mChooserHandler.removeMessages(CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT);
466    }
467
468    void onSetupVoiceInteraction() {
469        // Do nothing. We'll send the voice stuff ourselves.
470    }
471
472    void onRefinementResult(TargetInfo selectedTarget, Intent matchingIntent) {
473        if (mRefinementResultReceiver != null) {
474            mRefinementResultReceiver.destroy();
475            mRefinementResultReceiver = null;
476        }
477
478        if (selectedTarget == null) {
479            Log.e(TAG, "Refinement result intent did not match any known targets; canceling");
480        } else if (!checkTargetSourceIntent(selectedTarget, matchingIntent)) {
481            Log.e(TAG, "onRefinementResult: Selected target " + selectedTarget
482                    + " cannot match refined source intent " + matchingIntent);
483        } else if (super.onTargetSelected(selectedTarget.cloneFilledIn(matchingIntent, 0), false)) {
484            finish();
485            return;
486        }
487        onRefinementCanceled();
488    }
489
490    void onRefinementCanceled() {
491        if (mRefinementResultReceiver != null) {
492            mRefinementResultReceiver.destroy();
493            mRefinementResultReceiver = null;
494        }
495        finish();
496    }
497
498    boolean checkTargetSourceIntent(TargetInfo target, Intent matchingIntent) {
499        final List<Intent> targetIntents = target.getAllSourceIntents();
500        for (int i = 0, N = targetIntents.size(); i < N; i++) {
501            final Intent targetIntent = targetIntents.get(i);
502            if (targetIntent.filterEquals(matchingIntent)) {
503                return true;
504            }
505        }
506        return false;
507    }
508
509    void filterServiceTargets(String packageName, List<ChooserTarget> targets) {
510        if (targets == null) {
511            return;
512        }
513
514        final PackageManager pm = getPackageManager();
515        for (int i = targets.size() - 1; i >= 0; i--) {
516            final ChooserTarget target = targets.get(i);
517            final ComponentName targetName = target.getComponentName();
518            if (packageName != null && packageName.equals(targetName.getPackageName())) {
519                // Anything from the original target's package is fine.
520                continue;
521            }
522
523            boolean remove;
524            try {
525                final ActivityInfo ai = pm.getActivityInfo(targetName, 0);
526                remove = !ai.exported || ai.permission != null;
527            } catch (NameNotFoundException e) {
528                Log.e(TAG, "Target " + target + " returned by " + packageName
529                        + " component not found");
530                remove = true;
531            }
532
533            if (remove) {
534                targets.remove(i);
535            }
536        }
537    }
538
539    @Override
540    ResolveListAdapter createAdapter(Context context, List<Intent> payloadIntents,
541            Intent[] initialIntents, List<ResolveInfo> rList, int launchedFromUid,
542            boolean filterLastUsed) {
543        final ChooserListAdapter adapter = new ChooserListAdapter(context, payloadIntents,
544                initialIntents, rList, launchedFromUid, filterLastUsed);
545        if (DEBUG) Log.d(TAG, "Adapter created; querying services");
546        queryTargetServices(adapter);
547        return adapter;
548    }
549
550    final class ChooserTargetInfo implements TargetInfo {
551        private final DisplayResolveInfo mSourceInfo;
552        private final ResolveInfo mBackupResolveInfo;
553        private final ChooserTarget mChooserTarget;
554        private Drawable mBadgeIcon = null;
555        private CharSequence mBadgeContentDescription;
556        private Drawable mDisplayIcon;
557        private final Intent mFillInIntent;
558        private final int mFillInFlags;
559        private final float mModifiedScore;
560
561        public ChooserTargetInfo(DisplayResolveInfo sourceInfo, ChooserTarget chooserTarget,
562                float modifiedScore) {
563            mSourceInfo = sourceInfo;
564            mChooserTarget = chooserTarget;
565            mModifiedScore = modifiedScore;
566            if (sourceInfo != null) {
567                final ResolveInfo ri = sourceInfo.getResolveInfo();
568                if (ri != null) {
569                    final ActivityInfo ai = ri.activityInfo;
570                    if (ai != null && ai.applicationInfo != null) {
571                        final PackageManager pm = getPackageManager();
572                        mBadgeIcon = pm.getApplicationIcon(ai.applicationInfo);
573                        mBadgeContentDescription = pm.getApplicationLabel(ai.applicationInfo);
574                    }
575                }
576            }
577            final Icon icon = chooserTarget.getIcon();
578            // TODO do this in the background
579            mDisplayIcon = icon != null ? icon.loadDrawable(ChooserActivity.this) : null;
580
581            if (sourceInfo != null) {
582                mBackupResolveInfo = null;
583            } else {
584                mBackupResolveInfo = getPackageManager().resolveActivity(getResolvedIntent(), 0);
585            }
586
587            mFillInIntent = null;
588            mFillInFlags = 0;
589        }
590
591        private ChooserTargetInfo(ChooserTargetInfo other, Intent fillInIntent, int flags) {
592            mSourceInfo = other.mSourceInfo;
593            mBackupResolveInfo = other.mBackupResolveInfo;
594            mChooserTarget = other.mChooserTarget;
595            mBadgeIcon = other.mBadgeIcon;
596            mBadgeContentDescription = other.mBadgeContentDescription;
597            mDisplayIcon = other.mDisplayIcon;
598            mFillInIntent = fillInIntent;
599            mFillInFlags = flags;
600            mModifiedScore = other.mModifiedScore;
601        }
602
603        public float getModifiedScore() {
604            return mModifiedScore;
605        }
606
607        @Override
608        public Intent getResolvedIntent() {
609            if (mSourceInfo != null) {
610                return mSourceInfo.getResolvedIntent();
611            }
612            return getTargetIntent();
613        }
614
615        @Override
616        public ComponentName getResolvedComponentName() {
617            if (mSourceInfo != null) {
618                return mSourceInfo.getResolvedComponentName();
619            } else if (mBackupResolveInfo != null) {
620                return new ComponentName(mBackupResolveInfo.activityInfo.packageName,
621                        mBackupResolveInfo.activityInfo.name);
622            }
623            return null;
624        }
625
626        private Intent getBaseIntentToSend() {
627            Intent result = mSourceInfo != null
628                    ? mSourceInfo.getResolvedIntent() : getTargetIntent();
629            if (result == null) {
630                Log.e(TAG, "ChooserTargetInfo: no base intent available to send");
631            } else {
632                result = new Intent(result);
633                if (mFillInIntent != null) {
634                    result.fillIn(mFillInIntent, mFillInFlags);
635                }
636                result.fillIn(mReferrerFillInIntent, 0);
637            }
638            return result;
639        }
640
641        @Override
642        public boolean start(Activity activity, Bundle options) {
643            throw new RuntimeException("ChooserTargets should be started as caller.");
644        }
645
646        @Override
647        public boolean startAsCaller(Activity activity, Bundle options, int userId) {
648            final Intent intent = getBaseIntentToSend();
649            if (intent == null) {
650                return false;
651            }
652            intent.setComponent(mChooserTarget.getComponentName());
653            intent.putExtras(mChooserTarget.getIntentExtras());
654            activity.startActivityAsCaller(intent, options, true, userId);
655            return true;
656        }
657
658        @Override
659        public boolean startAsUser(Activity activity, Bundle options, UserHandle user) {
660            throw new RuntimeException("ChooserTargets should be started as caller.");
661        }
662
663        @Override
664        public ResolveInfo getResolveInfo() {
665            return mSourceInfo != null ? mSourceInfo.getResolveInfo() : mBackupResolveInfo;
666        }
667
668        @Override
669        public CharSequence getDisplayLabel() {
670            return mChooserTarget.getTitle();
671        }
672
673        @Override
674        public CharSequence getExtendedInfo() {
675            // ChooserTargets have badge icons, so we won't show the extended info to disambiguate.
676            return null;
677        }
678
679        @Override
680        public Drawable getDisplayIcon() {
681            return mDisplayIcon;
682        }
683
684        @Override
685        public Drawable getBadgeIcon() {
686            return mBadgeIcon;
687        }
688
689        @Override
690        public CharSequence getBadgeContentDescription() {
691            return mBadgeContentDescription;
692        }
693
694        @Override
695        public TargetInfo cloneFilledIn(Intent fillInIntent, int flags) {
696            return new ChooserTargetInfo(this, fillInIntent, flags);
697        }
698
699        @Override
700        public List<Intent> getAllSourceIntents() {
701            final List<Intent> results = new ArrayList<>();
702            if (mSourceInfo != null) {
703                // We only queried the service for the first one in our sourceinfo.
704                results.add(mSourceInfo.getAllSourceIntents().get(0));
705            }
706            return results;
707        }
708    }
709
710    public class ChooserListAdapter extends ResolveListAdapter {
711        public static final int TARGET_BAD = -1;
712        public static final int TARGET_CALLER = 0;
713        public static final int TARGET_SERVICE = 1;
714        public static final int TARGET_STANDARD = 2;
715
716        private static final int MAX_SERVICE_TARGETS = 8;
717
718        private final List<ChooserTargetInfo> mServiceTargets = new ArrayList<>();
719        private final List<TargetInfo> mCallerTargets = new ArrayList<>();
720
721        private float mLateFee = 1.f;
722
723        private final BaseChooserTargetComparator mBaseTargetComparator
724                = new BaseChooserTargetComparator();
725
726        public ChooserListAdapter(Context context, List<Intent> payloadIntents,
727                Intent[] initialIntents, List<ResolveInfo> rList, int launchedFromUid,
728                boolean filterLastUsed) {
729            // Don't send the initial intents through the shared ResolverActivity path,
730            // we want to separate them into a different section.
731            super(context, payloadIntents, null, rList, launchedFromUid, filterLastUsed);
732
733            if (initialIntents != null) {
734                final PackageManager pm = getPackageManager();
735                for (int i = 0; i < initialIntents.length; i++) {
736                    final Intent ii = initialIntents[i];
737                    if (ii == null) {
738                        continue;
739                    }
740                    final ActivityInfo ai = ii.resolveActivityInfo(pm, 0);
741                    if (ai == null) {
742                        Log.w(TAG, "No activity found for " + ii);
743                        continue;
744                    }
745                    ResolveInfo ri = new ResolveInfo();
746                    ri.activityInfo = ai;
747                    UserManager userManager =
748                            (UserManager) getSystemService(Context.USER_SERVICE);
749                    if (ii instanceof LabeledIntent) {
750                        LabeledIntent li = (LabeledIntent)ii;
751                        ri.resolvePackageName = li.getSourcePackage();
752                        ri.labelRes = li.getLabelResource();
753                        ri.nonLocalizedLabel = li.getNonLocalizedLabel();
754                        ri.icon = li.getIconResource();
755                        ri.iconResourceId = ri.icon;
756                    }
757                    if (userManager.isManagedProfile()) {
758                        ri.noResourceId = true;
759                        ri.icon = 0;
760                    }
761                    mCallerTargets.add(new DisplayResolveInfo(ii, ri,
762                            ri.loadLabel(pm), null, ii));
763                }
764            }
765        }
766
767        @Override
768        public boolean showsExtendedInfo(TargetInfo info) {
769            // We have badges so we don't need this text shown.
770            return false;
771        }
772
773        @Override
774        public View onCreateView(ViewGroup parent) {
775            return mInflater.inflate(
776                    com.android.internal.R.layout.resolve_grid_item, parent, false);
777        }
778
779        @Override
780        public void onListRebuilt() {
781            if (mServiceTargets != null) {
782                pruneServiceTargets();
783            }
784        }
785
786        @Override
787        public boolean shouldGetResolvedFilter() {
788            return true;
789        }
790
791        @Override
792        public int getCount() {
793            return super.getCount() + getServiceTargetCount() + getCallerTargetCount();
794        }
795
796        @Override
797        public int getUnfilteredCount() {
798            return super.getUnfilteredCount() + getServiceTargetCount() + getCallerTargetCount();
799        }
800
801        public int getCallerTargetCount() {
802            return mCallerTargets.size();
803        }
804
805        public int getServiceTargetCount() {
806            return Math.min(mServiceTargets.size(), MAX_SERVICE_TARGETS);
807        }
808
809        public int getStandardTargetCount() {
810            return super.getCount();
811        }
812
813        public int getPositionTargetType(int position) {
814            int offset = 0;
815
816            final int callerTargetCount = getCallerTargetCount();
817            if (position < callerTargetCount) {
818                return TARGET_CALLER;
819            }
820            offset += callerTargetCount;
821
822            final int serviceTargetCount = getServiceTargetCount();
823            if (position - offset < serviceTargetCount) {
824                return TARGET_SERVICE;
825            }
826            offset += serviceTargetCount;
827
828            final int standardTargetCount = super.getCount();
829            if (position - offset < standardTargetCount) {
830                return TARGET_STANDARD;
831            }
832
833            return TARGET_BAD;
834        }
835
836        @Override
837        public TargetInfo getItem(int position) {
838            return targetInfoForPosition(position, true);
839        }
840
841        @Override
842        public TargetInfo targetInfoForPosition(int position, boolean filtered) {
843            int offset = 0;
844
845            final int callerTargetCount = getCallerTargetCount();
846            if (position < callerTargetCount) {
847                return mCallerTargets.get(position);
848            }
849            offset += callerTargetCount;
850
851            final int serviceTargetCount = getServiceTargetCount();
852            if (position - offset < serviceTargetCount) {
853                return mServiceTargets.get(position - offset);
854            }
855            offset += serviceTargetCount;
856
857            return filtered ? super.getItem(position - offset)
858                    : getDisplayInfoAt(position - offset);
859        }
860
861        public void addServiceResults(DisplayResolveInfo origTarget, List<ChooserTarget> targets) {
862            if (DEBUG) Log.d(TAG, "addServiceResults " + origTarget + ", " + targets.size()
863                    + " targets");
864            final float parentScore = getScore(origTarget);
865            Collections.sort(targets, mBaseTargetComparator);
866            float lastScore = 0;
867            for (int i = 0, N = targets.size(); i < N; i++) {
868                final ChooserTarget target = targets.get(i);
869                float targetScore = target.getScore();
870                targetScore *= parentScore;
871                targetScore *= mLateFee;
872                if (i > 0 && targetScore >= lastScore) {
873                    // Apply a decay so that the top app can't crowd out everything else.
874                    // This incents ChooserTargetServices to define what's truly better.
875                    targetScore = lastScore * 0.95f;
876                }
877                insertServiceTarget(new ChooserTargetInfo(origTarget, target, targetScore));
878
879                if (DEBUG) {
880                    Log.d(TAG, " => " + target.toString() + " score=" + targetScore
881                            + " base=" + target.getScore()
882                            + " lastScore=" + lastScore
883                            + " parentScore=" + parentScore
884                            + " lateFee=" + mLateFee);
885                }
886
887                lastScore = targetScore;
888            }
889
890            mLateFee *= 0.95f;
891
892            notifyDataSetChanged();
893        }
894
895        private void insertServiceTarget(ChooserTargetInfo chooserTargetInfo) {
896            final float newScore = chooserTargetInfo.getModifiedScore();
897            for (int i = 0, N = mServiceTargets.size(); i < N; i++) {
898                final ChooserTargetInfo serviceTarget = mServiceTargets.get(i);
899                if (newScore > serviceTarget.getModifiedScore()) {
900                    mServiceTargets.add(i, chooserTargetInfo);
901                    return;
902                }
903            }
904            mServiceTargets.add(chooserTargetInfo);
905        }
906
907        private void pruneServiceTargets() {
908            if (DEBUG) Log.d(TAG, "pruneServiceTargets");
909            for (int i = mServiceTargets.size() - 1; i >= 0; i--) {
910                final ChooserTargetInfo cti = mServiceTargets.get(i);
911                if (!hasResolvedTarget(cti.getResolveInfo())) {
912                    if (DEBUG) Log.d(TAG, " => " + i + " " + cti);
913                    mServiceTargets.remove(i);
914                }
915            }
916        }
917    }
918
919    static class BaseChooserTargetComparator implements Comparator<ChooserTarget> {
920        @Override
921        public int compare(ChooserTarget lhs, ChooserTarget rhs) {
922            // Descending order
923            return (int) Math.signum(lhs.getScore() - rhs.getScore());
924        }
925    }
926
927    static class RowScale {
928        private static final int DURATION = 400;
929
930        float mScale;
931        ChooserRowAdapter mAdapter;
932        private final ObjectAnimator mAnimator;
933
934        public static final FloatProperty<RowScale> PROPERTY =
935                new FloatProperty<RowScale>("scale") {
936            @Override
937            public void setValue(RowScale object, float value) {
938                object.mScale = value;
939                object.mAdapter.notifyDataSetChanged();
940            }
941
942            @Override
943            public Float get(RowScale object) {
944                return object.mScale;
945            }
946        };
947
948        public RowScale(@NonNull ChooserRowAdapter adapter, float from, float to) {
949            mAdapter = adapter;
950            mScale = from;
951            if (from == to) {
952                mAnimator = null;
953                return;
954            }
955
956            mAnimator = ObjectAnimator.ofFloat(this, PROPERTY, from, to).setDuration(DURATION);
957        }
958
959        public RowScale setInterpolator(Interpolator interpolator) {
960            if (mAnimator != null) {
961                mAnimator.setInterpolator(interpolator);
962            }
963            return this;
964        }
965
966        public float get() {
967            return mScale;
968        }
969
970        public void startAnimation() {
971            if (mAnimator != null) {
972                mAnimator.start();
973            }
974        }
975
976        public void cancelAnimation() {
977            if (mAnimator != null) {
978                mAnimator.cancel();
979            }
980        }
981    }
982
983    class ChooserRowAdapter extends BaseAdapter {
984        private ChooserListAdapter mChooserListAdapter;
985        private final LayoutInflater mLayoutInflater;
986        private final int mColumnCount = 4;
987        private RowScale[] mServiceTargetScale;
988        private final Interpolator mInterpolator;
989
990        public ChooserRowAdapter(ChooserListAdapter wrappedAdapter) {
991            mChooserListAdapter = wrappedAdapter;
992            mLayoutInflater = LayoutInflater.from(ChooserActivity.this);
993
994            mInterpolator = AnimationUtils.loadInterpolator(ChooserActivity.this,
995                    android.R.interpolator.decelerate_quint);
996
997            wrappedAdapter.registerDataSetObserver(new DataSetObserver() {
998                @Override
999                public void onChanged() {
1000                    super.onChanged();
1001                    final int rcount = getServiceTargetRowCount();
1002                    if (mServiceTargetScale == null
1003                            || mServiceTargetScale.length != rcount) {
1004                        RowScale[] old = mServiceTargetScale;
1005                        int oldRCount = old != null ? old.length : 0;
1006                        mServiceTargetScale = new RowScale[rcount];
1007                        if (old != null && rcount > 0) {
1008                            System.arraycopy(old, 0, mServiceTargetScale, 0,
1009                                    Math.min(old.length, rcount));
1010                        }
1011
1012                        for (int i = rcount; i < oldRCount; i++) {
1013                            old[i].cancelAnimation();
1014                        }
1015
1016                        for (int i = oldRCount; i < rcount; i++) {
1017                            final RowScale rs = new RowScale(ChooserRowAdapter.this, 0.f, 1.f)
1018                                    .setInterpolator(mInterpolator);
1019                            mServiceTargetScale[i] = rs;
1020                            rs.startAnimation();
1021                        }
1022                    }
1023
1024                    notifyDataSetChanged();
1025                }
1026
1027                @Override
1028                public void onInvalidated() {
1029                    super.onInvalidated();
1030                    notifyDataSetInvalidated();
1031                    if (mServiceTargetScale != null) {
1032                        for (RowScale rs : mServiceTargetScale) {
1033                            rs.cancelAnimation();
1034                        }
1035                    }
1036                }
1037            });
1038        }
1039
1040        private float getRowScale(int rowPosition) {
1041            final int start = getCallerTargetRowCount();
1042            final int end = start + getServiceTargetRowCount();
1043            if (rowPosition >= start && rowPosition < end) {
1044                return mServiceTargetScale[rowPosition - start].get();
1045            }
1046            return 1.f;
1047        }
1048
1049        @Override
1050        public int getCount() {
1051            return (int) (
1052                    getCallerTargetRowCount()
1053                    + getServiceTargetRowCount()
1054                    + Math.ceil((float) mChooserListAdapter.getStandardTargetCount() / mColumnCount)
1055            );
1056        }
1057
1058        public int getCallerTargetRowCount() {
1059            return (int) Math.ceil(
1060                    (float) mChooserListAdapter.getCallerTargetCount() / mColumnCount);
1061        }
1062
1063        public int getServiceTargetRowCount() {
1064            return (int) Math.ceil(
1065                    (float) mChooserListAdapter.getServiceTargetCount() / mColumnCount);
1066        }
1067
1068        @Override
1069        public Object getItem(int position) {
1070            // We have nothing useful to return here.
1071            return position;
1072        }
1073
1074        @Override
1075        public long getItemId(int position) {
1076            return position;
1077        }
1078
1079        @Override
1080        public View getView(int position, View convertView, ViewGroup parent) {
1081            final RowViewHolder holder;
1082            if (convertView == null) {
1083                holder = createViewHolder(parent);
1084            } else {
1085                holder = (RowViewHolder) convertView.getTag();
1086            }
1087            bindViewHolder(position, holder);
1088
1089            return holder.row;
1090        }
1091
1092        RowViewHolder createViewHolder(ViewGroup parent) {
1093            final ViewGroup row = (ViewGroup) mLayoutInflater.inflate(R.layout.chooser_row,
1094                    parent, false);
1095            final RowViewHolder holder = new RowViewHolder(row, mColumnCount);
1096            final int spec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
1097
1098            for (int i = 0; i < mColumnCount; i++) {
1099                final View v = mChooserListAdapter.createView(row);
1100                v.setOnClickListener(new OnClickListener() {
1101                    @Override
1102                    public void onClick(View v) {
1103                        startSelected(holder.itemIndex, false, true);
1104                    }
1105                });
1106                v.setOnLongClickListener(new OnLongClickListener() {
1107                    @Override
1108                    public boolean onLongClick(View v) {
1109                        showAppDetails(
1110                                mChooserListAdapter.resolveInfoForPosition(holder.itemIndex, true));
1111                        return true;
1112                    }
1113                });
1114                row.addView(v);
1115                holder.cells[i] = v;
1116
1117                // Force height to be a given so we don't have visual disruption during scaling.
1118                LayoutParams lp = v.getLayoutParams();
1119                v.measure(spec, spec);
1120                if (lp == null) {
1121                    lp = new LayoutParams(LayoutParams.MATCH_PARENT, v.getMeasuredHeight());
1122                    row.setLayoutParams(lp);
1123                } else {
1124                    lp.height = v.getMeasuredHeight();
1125                }
1126            }
1127
1128            // Pre-measure so we can scale later.
1129            holder.measure();
1130            LayoutParams lp = row.getLayoutParams();
1131            if (lp == null) {
1132                lp = new LayoutParams(LayoutParams.MATCH_PARENT, holder.measuredRowHeight);
1133                row.setLayoutParams(lp);
1134            } else {
1135                lp.height = holder.measuredRowHeight;
1136            }
1137            row.setTag(holder);
1138            return holder;
1139        }
1140
1141        void bindViewHolder(int rowPosition, RowViewHolder holder) {
1142            final int start = getFirstRowPosition(rowPosition);
1143            final int startType = mChooserListAdapter.getPositionTargetType(start);
1144
1145            int end = start + mColumnCount - 1;
1146            while (mChooserListAdapter.getPositionTargetType(end) != startType && end >= start) {
1147                end--;
1148            }
1149
1150            if (startType == ChooserListAdapter.TARGET_SERVICE) {
1151                holder.row.setBackgroundColor(
1152                        getColor(R.color.chooser_service_row_background_color));
1153            } else {
1154                holder.row.setBackgroundColor(Color.TRANSPARENT);
1155            }
1156
1157            final int oldHeight = holder.row.getLayoutParams().height;
1158            holder.row.getLayoutParams().height = Math.max(1,
1159                    (int) (holder.measuredRowHeight * getRowScale(rowPosition)));
1160            if (holder.row.getLayoutParams().height != oldHeight) {
1161                holder.row.requestLayout();
1162            }
1163
1164            for (int i = 0; i < mColumnCount; i++) {
1165                final View v = holder.cells[i];
1166                if (start + i <= end) {
1167                    v.setVisibility(View.VISIBLE);
1168                    holder.itemIndex = start + i;
1169                    mChooserListAdapter.bindView(holder.itemIndex, v);
1170                } else {
1171                    v.setVisibility(View.GONE);
1172                }
1173            }
1174        }
1175
1176        int getFirstRowPosition(int row) {
1177            final int callerCount = mChooserListAdapter.getCallerTargetCount();
1178            final int callerRows = (int) Math.ceil((float) callerCount / mColumnCount);
1179
1180            if (row < callerRows) {
1181                return row * mColumnCount;
1182            }
1183
1184            final int serviceCount = mChooserListAdapter.getServiceTargetCount();
1185            final int serviceRows = (int) Math.ceil((float) serviceCount / mColumnCount);
1186
1187            if (row < callerRows + serviceRows) {
1188                return callerCount + (row - callerRows) * mColumnCount;
1189            }
1190
1191            return callerCount + serviceCount
1192                    + (row - callerRows - serviceRows) * mColumnCount;
1193        }
1194    }
1195
1196    static class RowViewHolder {
1197        final View[] cells;
1198        final ViewGroup row;
1199        int measuredRowHeight;
1200        int itemIndex;
1201
1202        public RowViewHolder(ViewGroup row, int cellCount) {
1203            this.row = row;
1204            this.cells = new View[cellCount];
1205        }
1206
1207        public void measure() {
1208            final int spec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
1209            row.measure(spec, spec);
1210            measuredRowHeight = row.getMeasuredHeight();
1211        }
1212    }
1213
1214    static class ChooserTargetServiceConnection implements ServiceConnection {
1215        private final DisplayResolveInfo mOriginalTarget;
1216        private ComponentName mConnectedComponent;
1217        private ChooserActivity mChooserActivity;
1218        private final Object mLock = new Object();
1219
1220        private final IChooserTargetResult mChooserTargetResult = new IChooserTargetResult.Stub() {
1221            @Override
1222            public void sendResult(List<ChooserTarget> targets) throws RemoteException {
1223                synchronized (mLock) {
1224                    if (mChooserActivity == null) {
1225                        Log.e(TAG, "destroyed ChooserTargetServiceConnection received result from "
1226                                + mConnectedComponent + "; ignoring...");
1227                        return;
1228                    }
1229                    mChooserActivity.filterServiceTargets(
1230                            mOriginalTarget.getResolveInfo().activityInfo.packageName, targets);
1231                    final Message msg = Message.obtain();
1232                    msg.what = CHOOSER_TARGET_SERVICE_RESULT;
1233                    msg.obj = new ServiceResultInfo(mOriginalTarget, targets,
1234                            ChooserTargetServiceConnection.this);
1235                    mChooserActivity.mChooserHandler.sendMessage(msg);
1236                }
1237            }
1238        };
1239
1240        public ChooserTargetServiceConnection(ChooserActivity chooserActivity,
1241                DisplayResolveInfo dri) {
1242            mChooserActivity = chooserActivity;
1243            mOriginalTarget = dri;
1244        }
1245
1246        @Override
1247        public void onServiceConnected(ComponentName name, IBinder service) {
1248            if (DEBUG) Log.d(TAG, "onServiceConnected: " + name);
1249            synchronized (mLock) {
1250                if (mChooserActivity == null) {
1251                    Log.e(TAG, "destroyed ChooserTargetServiceConnection got onServiceConnected");
1252                    return;
1253                }
1254
1255                final IChooserTargetService icts = IChooserTargetService.Stub.asInterface(service);
1256                try {
1257                    icts.getChooserTargets(mOriginalTarget.getResolvedComponentName(),
1258                            mOriginalTarget.getResolveInfo().filter, mChooserTargetResult);
1259                } catch (RemoteException e) {
1260                    Log.e(TAG, "Querying ChooserTargetService " + name + " failed.", e);
1261                    mChooserActivity.unbindService(this);
1262                    destroy();
1263                    mChooserActivity.mServiceConnections.remove(this);
1264                }
1265            }
1266        }
1267
1268        @Override
1269        public void onServiceDisconnected(ComponentName name) {
1270            if (DEBUG) Log.d(TAG, "onServiceDisconnected: " + name);
1271            synchronized (mLock) {
1272                if (mChooserActivity == null) {
1273                    Log.e(TAG,
1274                            "destroyed ChooserTargetServiceConnection got onServiceDisconnected");
1275                    return;
1276                }
1277
1278                mChooserActivity.unbindService(this);
1279                destroy();
1280                mChooserActivity.mServiceConnections.remove(this);
1281                if (mChooserActivity.mServiceConnections.isEmpty()) {
1282                    mChooserActivity.mChooserHandler.removeMessages(
1283                            CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT);
1284                    mChooserActivity.sendVoiceChoicesIfNeeded();
1285                }
1286                mConnectedComponent = null;
1287            }
1288        }
1289
1290        public void destroy() {
1291            synchronized (mLock) {
1292                mChooserActivity = null;
1293            }
1294        }
1295
1296        @Override
1297        public String toString() {
1298            return "ChooserTargetServiceConnection{service="
1299                    + mConnectedComponent + ", activity="
1300                    + mOriginalTarget.getResolveInfo().activityInfo.toString() + "}";
1301        }
1302    }
1303
1304    static class ServiceResultInfo {
1305        public final DisplayResolveInfo originalTarget;
1306        public final List<ChooserTarget> resultTargets;
1307        public final ChooserTargetServiceConnection connection;
1308
1309        public ServiceResultInfo(DisplayResolveInfo ot, List<ChooserTarget> rt,
1310                ChooserTargetServiceConnection c) {
1311            originalTarget = ot;
1312            resultTargets = rt;
1313            connection = c;
1314        }
1315    }
1316
1317    static class RefinementResultReceiver extends ResultReceiver {
1318        private ChooserActivity mChooserActivity;
1319        private TargetInfo mSelectedTarget;
1320
1321        public RefinementResultReceiver(ChooserActivity host, TargetInfo target,
1322                Handler handler) {
1323            super(handler);
1324            mChooserActivity = host;
1325            mSelectedTarget = target;
1326        }
1327
1328        @Override
1329        protected void onReceiveResult(int resultCode, Bundle resultData) {
1330            if (mChooserActivity == null) {
1331                Log.e(TAG, "Destroyed RefinementResultReceiver received a result");
1332                return;
1333            }
1334            if (resultData == null) {
1335                Log.e(TAG, "RefinementResultReceiver received null resultData");
1336                return;
1337            }
1338
1339            switch (resultCode) {
1340                case RESULT_CANCELED:
1341                    mChooserActivity.onRefinementCanceled();
1342                    break;
1343                case RESULT_OK:
1344                    Parcelable intentParcelable = resultData.getParcelable(Intent.EXTRA_INTENT);
1345                    if (intentParcelable instanceof Intent) {
1346                        mChooserActivity.onRefinementResult(mSelectedTarget,
1347                                (Intent) intentParcelable);
1348                    } else {
1349                        Log.e(TAG, "RefinementResultReceiver received RESULT_OK but no Intent"
1350                                + " in resultData with key Intent.EXTRA_INTENT");
1351                    }
1352                    break;
1353                default:
1354                    Log.w(TAG, "Unknown result code " + resultCode
1355                            + " sent to RefinementResultReceiver");
1356                    break;
1357            }
1358        }
1359
1360        public void destroy() {
1361            mChooserActivity = null;
1362            mSelectedTarget = null;
1363        }
1364    }
1365
1366    class OffsetDataSetObserver extends DataSetObserver {
1367        private final AbsListView mListView;
1368        private int mCachedViewType = -1;
1369        private View mCachedView;
1370
1371        public OffsetDataSetObserver(AbsListView listView) {
1372            mListView = listView;
1373        }
1374
1375        @Override
1376        public void onChanged() {
1377            if (mResolverDrawerLayout == null) {
1378                return;
1379            }
1380
1381            final int chooserTargetRows = mChooserRowAdapter.getServiceTargetRowCount();
1382            int offset = 0;
1383            for (int i = 0; i < chooserTargetRows; i++)  {
1384                final int pos = mChooserRowAdapter.getCallerTargetRowCount() + i;
1385                final int vt = mChooserRowAdapter.getItemViewType(pos);
1386                if (vt != mCachedViewType) {
1387                    mCachedView = null;
1388                }
1389                final View v = mChooserRowAdapter.getView(pos, mCachedView, mListView);
1390                int height = ((RowViewHolder) (v.getTag())).measuredRowHeight;
1391
1392                offset += (int) (height * mChooserRowAdapter.getRowScale(pos) * chooserTargetRows);
1393
1394                if (vt >= 0) {
1395                    mCachedViewType = vt;
1396                    mCachedView = v;
1397                } else {
1398                    mCachedViewType = -1;
1399                }
1400            }
1401
1402            mResolverDrawerLayout.setCollapsibleHeightReserved(offset);
1403        }
1404    }
1405}
1406