ChooserActivity.java revision e7c74cc96eeecec52401d9bf720234d1421cfebc 
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;
69import com.android.internal.logging.MetricsProto.MetricsEvent;
70
71import java.util.ArrayList;
72import java.util.Collections;
73import java.util.Comparator;
74import java.util.List;
75
76public class ChooserActivity extends ResolverActivity {
77    private static final String TAG = "ChooserActivity";
78
79    private static final boolean DEBUG = false;
80
81    private static final int QUERY_TARGET_SERVICE_LIMIT = 5;
82    private static final int WATCHDOG_TIMEOUT_MILLIS = 5000;
83
84    private Bundle mReplacementExtras;
85    private IntentSender mChosenComponentSender;
86    private IntentSender mRefinementIntentSender;
87    private RefinementResultReceiver mRefinementResultReceiver;
88
89    private Intent mReferrerFillInIntent;
90
91    private ChooserListAdapter mChooserListAdapter;
92    private ChooserRowAdapter mChooserRowAdapter;
93
94    private final List<ChooserTargetServiceConnection> mServiceConnections = new ArrayList<>();
95
96    private static final int CHOOSER_TARGET_SERVICE_RESULT = 1;
97    private static final int CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT = 2;
98
99    private final Handler mChooserHandler = new Handler() {
100        @Override
101        public void handleMessage(Message msg) {
102            switch (msg.what) {
103                case CHOOSER_TARGET_SERVICE_RESULT:
104                    if (DEBUG) Log.d(TAG, "CHOOSER_TARGET_SERVICE_RESULT");
105                    if (isDestroyed()) break;
106                    final ServiceResultInfo sri = (ServiceResultInfo) msg.obj;
107                    if (!mServiceConnections.contains(sri.connection)) {
108                        Log.w(TAG, "ChooserTargetServiceConnection " + sri.connection
109                                + " returned after being removed from active connections."
110                                + " Have you considered returning results faster?");
111                        break;
112                    }
113                    if (sri.resultTargets != null) {
114                        mChooserListAdapter.addServiceResults(sri.originalTarget,
115                                sri.resultTargets);
116                    }
117                    unbindService(sri.connection);
118                    sri.connection.destroy();
119                    mServiceConnections.remove(sri.connection);
120                    if (mServiceConnections.isEmpty()) {
121                        mChooserHandler.removeMessages(CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT);
122                        sendVoiceChoicesIfNeeded();
123                    }
124                    break;
125
126                case CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT:
127                    if (DEBUG) {
128                        Log.d(TAG, "CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT; unbinding services");
129                    }
130                    unbindRemainingServices();
131                    sendVoiceChoicesIfNeeded();
132                    break;
133
134                default:
135                    super.handleMessage(msg);
136            }
137        }
138    };
139
140    @Override
141    protected void onCreate(Bundle savedInstanceState) {
142        Intent intent = getIntent();
143        Parcelable targetParcelable = intent.getParcelableExtra(Intent.EXTRA_INTENT);
144        if (!(targetParcelable instanceof Intent)) {
145            Log.w("ChooserActivity", "Target is not an intent: " + targetParcelable);
146            finish();
147            super.onCreate(null);
148            return;
149        }
150        Intent target = (Intent) targetParcelable;
151        if (target != null) {
152            modifyTargetIntent(target);
153        }
154        Parcelable[] targetsParcelable
155                = intent.getParcelableArrayExtra(Intent.EXTRA_ALTERNATE_INTENTS);
156        if (targetsParcelable != null) {
157            final boolean offset = target == null;
158            Intent[] additionalTargets =
159                    new Intent[offset ? targetsParcelable.length - 1 : targetsParcelable.length];
160            for (int i = 0; i < targetsParcelable.length; i++) {
161                if (!(targetsParcelable[i] instanceof Intent)) {
162                    Log.w(TAG, "EXTRA_ALTERNATE_INTENTS array entry #" + i + " is not an Intent: "
163                            + targetsParcelable[i]);
164                    finish();
165                    super.onCreate(null);
166                    return;
167                }
168                final Intent additionalTarget = (Intent) targetsParcelable[i];
169                if (i == 0 && target == null) {
170                    target = additionalTarget;
171                    modifyTargetIntent(target);
172                } else {
173                    additionalTargets[offset ? i - 1 : i] = additionalTarget;
174                    modifyTargetIntent(additionalTarget);
175                }
176            }
177            setAdditionalTargets(additionalTargets);
178        }
179
180        mReplacementExtras = intent.getBundleExtra(Intent.EXTRA_REPLACEMENT_EXTRAS);
181        CharSequence title = intent.getCharSequenceExtra(Intent.EXTRA_TITLE);
182        int defaultTitleRes = 0;
183        if (title == null) {
184            defaultTitleRes = com.android.internal.R.string.chooseActivity;
185        }
186        Parcelable[] pa = intent.getParcelableArrayExtra(Intent.EXTRA_INITIAL_INTENTS);
187        Intent[] initialIntents = null;
188        if (pa != null) {
189            initialIntents = new Intent[pa.length];
190            for (int i=0; i<pa.length; i++) {
191                if (!(pa[i] instanceof Intent)) {
192                    Log.w(TAG, "Initial intent #" + i + " not an Intent: " + pa[i]);
193                    finish();
194                    super.onCreate(null);
195                    return;
196                }
197                final Intent in = (Intent) pa[i];
198                modifyTargetIntent(in);
199                initialIntents[i] = in;
200            }
201        }
202
203        mReferrerFillInIntent = new Intent().putExtra(Intent.EXTRA_REFERRER, getReferrer());
204
205        mChosenComponentSender = intent.getParcelableExtra(
206                Intent.EXTRA_CHOSEN_COMPONENT_INTENT_SENDER);
207        mRefinementIntentSender = intent.getParcelableExtra(
208                Intent.EXTRA_CHOOSER_REFINEMENT_INTENT_SENDER);
209        setSafeForwardingMode(true);
210        super.onCreate(savedInstanceState, target, title, defaultTitleRes, initialIntents,
211                null, false);
212
213        MetricsLogger.action(this, MetricsEvent.ACTION_ACTIVITY_CHOOSER_SHOWN);
214    }
215
216    @Override
217    protected void onDestroy() {
218        super.onDestroy();
219        if (mRefinementResultReceiver != null) {
220            mRefinementResultReceiver.destroy();
221            mRefinementResultReceiver = null;
222        }
223        unbindRemainingServices();
224        mChooserHandler.removeMessages(CHOOSER_TARGET_SERVICE_RESULT);
225    }
226
227    @Override
228    public Intent getReplacementIntent(ActivityInfo aInfo, Intent defIntent) {
229        Intent result = defIntent;
230        if (mReplacementExtras != null) {
231            final Bundle replExtras = mReplacementExtras.getBundle(aInfo.packageName);
232            if (replExtras != null) {
233                result = new Intent(defIntent);
234                result.putExtras(replExtras);
235            }
236        }
237        if (aInfo.name.equals(IntentForwarderActivity.FORWARD_INTENT_TO_PARENT)
238                || aInfo.name.equals(IntentForwarderActivity.FORWARD_INTENT_TO_MANAGED_PROFILE)) {
239            result = Intent.createChooser(result,
240                    getIntent().getCharSequenceExtra(Intent.EXTRA_TITLE));
241        }
242        return result;
243    }
244
245    @Override
246    void onActivityStarted(TargetInfo cti) {
247        if (mChosenComponentSender != null) {
248            final ComponentName target = cti.getResolvedComponentName();
249            if (target != null) {
250                final Intent fillIn = new Intent().putExtra(Intent.EXTRA_CHOSEN_COMPONENT, target);
251                try {
252                    mChosenComponentSender.sendIntent(this, Activity.RESULT_OK, fillIn, null, null);
253                } catch (IntentSender.SendIntentException e) {
254                    Slog.e(TAG, "Unable to launch supplied IntentSender to report "
255                            + "the chosen component: " + e);
256                }
257            }
258        }
259    }
260
261    @Override
262    void onPrepareAdapterView(AbsListView adapterView, ResolveListAdapter adapter,
263            boolean alwaysUseOption) {
264        final ListView listView = adapterView instanceof ListView ? (ListView) adapterView : null;
265        mChooserListAdapter = (ChooserListAdapter) adapter;
266        mChooserRowAdapter = new ChooserRowAdapter(mChooserListAdapter);
267        mChooserRowAdapter.registerDataSetObserver(new OffsetDataSetObserver(adapterView));
268        adapterView.setAdapter(mChooserRowAdapter);
269        if (listView != null) {
270            listView.setItemsCanFocus(true);
271        }
272    }
273
274    @Override
275    int getLayoutResource() {
276        return R.layout.chooser_grid;
277    }
278
279    @Override
280    boolean shouldGetActivityMetadata() {
281        return true;
282    }
283
284    @Override
285    boolean shouldAutoLaunchSingleChoice(TargetInfo target) {
286        final Intent intent = target.getResolvedIntent();
287        final ResolveInfo resolve = target.getResolveInfo();
288
289        // When GET_CONTENT is handled by the DocumentsUI system component,
290        // we're okay automatically launching it, since it offers it's own
291        // intent disambiguation UI.
292        if (intent != null && Intent.ACTION_GET_CONTENT.equals(intent.getAction())
293                && resolve != null && resolve.priority > 0
294                && resolve.activityInfo != null && DocumentsContract.PACKAGE_DOCUMENTS_UI
295                        .equals(resolve.activityInfo.packageName)) {
296            return true;
297        }
298
299        return false;
300    }
301
302    private void modifyTargetIntent(Intent in) {
303        final String action = in.getAction();
304        if (Intent.ACTION_SEND.equals(action) ||
305                Intent.ACTION_SEND_MULTIPLE.equals(action)) {
306            in.addFlags(Intent.FLAG_ACTIVITY_NEW_DOCUMENT |
307                    Intent.FLAG_ACTIVITY_MULTIPLE_TASK);
308        }
309    }
310
311    @Override
312    protected boolean onTargetSelected(TargetInfo target, boolean alwaysCheck) {
313        if (mRefinementIntentSender != null) {
314            final Intent fillIn = new Intent();
315            final List<Intent> sourceIntents = target.getAllSourceIntents();
316            if (!sourceIntents.isEmpty()) {
317                fillIn.putExtra(Intent.EXTRA_INTENT, sourceIntents.get(0));
318                if (sourceIntents.size() > 1) {
319                    final Intent[] alts = new Intent[sourceIntents.size() - 1];
320                    for (int i = 1, N = sourceIntents.size(); i < N; i++) {
321                        alts[i - 1] = sourceIntents.get(i);
322                    }
323                    fillIn.putExtra(Intent.EXTRA_ALTERNATE_INTENTS, alts);
324                }
325                if (mRefinementResultReceiver != null) {
326                    mRefinementResultReceiver.destroy();
327                }
328                mRefinementResultReceiver = new RefinementResultReceiver(this, target, null);
329                fillIn.putExtra(Intent.EXTRA_RESULT_RECEIVER,
330                        mRefinementResultReceiver);
331                try {
332                    mRefinementIntentSender.sendIntent(this, 0, fillIn, null, null);
333                    return false;
334                } catch (SendIntentException e) {
335                    Log.e(TAG, "Refinement IntentSender failed to send", e);
336                }
337            }
338        }
339        return super.onTargetSelected(target, alwaysCheck);
340    }
341
342    @Override
343    void startSelected(int which, boolean always, boolean filtered) {
344        super.startSelected(which, always, filtered);
345
346        if (mChooserListAdapter != null) {
347            // Log the index of which type of target the user picked.
348            // Lower values mean the ranking was better.
349            int cat = 0;
350            int value = which;
351            switch (mChooserListAdapter.getPositionTargetType(which)) {
352                case ChooserListAdapter.TARGET_CALLER:
353                    cat = MetricsEvent.ACTION_ACTIVITY_CHOOSER_PICKED_APP_TARGET;
354                    break;
355                case ChooserListAdapter.TARGET_SERVICE:
356                    cat = MetricsEvent.ACTION_ACTIVITY_CHOOSER_PICKED_SERVICE_TARGET;
357                    value -= mChooserListAdapter.getCallerTargetCount();
358                    break;
359                case ChooserListAdapter.TARGET_STANDARD:
360                    cat = MetricsEvent.ACTION_ACTIVITY_CHOOSER_PICKED_STANDARD_TARGET;
361                    value -= mChooserListAdapter.getCallerTargetCount()
362                            + mChooserListAdapter.getServiceTargetCount();
363                    break;
364            }
365
366            if (cat != 0) {
367                MetricsLogger.action(this, cat, value);
368            }
369        }
370    }
371
372    void queryTargetServices(ChooserListAdapter adapter) {
373        final PackageManager pm = getPackageManager();
374        int targetsToQuery = 0;
375        for (int i = 0, N = adapter.getDisplayResolveInfoCount(); i < N; i++) {
376            final DisplayResolveInfo dri = adapter.getDisplayResolveInfo(i);
377            if (adapter.getScore(dri) == 0) {
378                // A score of 0 means the app hasn't been used in some time;
379                // don't query it as it's not likely to be relevant.
380                continue;
381            }
382            final ActivityInfo ai = dri.getResolveInfo().activityInfo;
383            final Bundle md = ai.metaData;
384            final String serviceName = md != null ? convertServiceName(ai.packageName,
385                    md.getString(ChooserTargetService.META_DATA_NAME)) : null;
386            if (serviceName != null) {
387                final ComponentName serviceComponent = new ComponentName(
388                        ai.packageName, serviceName);
389                final Intent serviceIntent = new Intent(ChooserTargetService.SERVICE_INTERFACE)
390                        .setComponent(serviceComponent);
391
392                if (DEBUG) {
393                    Log.d(TAG, "queryTargets found target with service " + serviceComponent);
394                }
395
396                try {
397                    final String perm = pm.getServiceInfo(serviceComponent, 0).permission;
398                    if (!ChooserTargetService.BIND_PERMISSION.equals(perm)) {
399                        Log.w(TAG, "ChooserTargetService " + serviceComponent + " does not require"
400                                + " permission " + ChooserTargetService.BIND_PERMISSION
401                                + " - this service will not be queried for ChooserTargets."
402                                + " add android:permission=\""
403                                + ChooserTargetService.BIND_PERMISSION + "\""
404                                + " to the <service> tag for " + serviceComponent
405                                + " in the manifest.");
406                        continue;
407                    }
408                } catch (NameNotFoundException e) {
409                    Log.e(TAG, "Could not look up service " + serviceComponent, e);
410                    continue;
411                }
412
413                final ChooserTargetServiceConnection conn =
414                        new ChooserTargetServiceConnection(this, dri);
415                if (bindServiceAsUser(serviceIntent, conn, BIND_AUTO_CREATE | BIND_NOT_FOREGROUND,
416                        UserHandle.CURRENT)) {
417                    if (DEBUG) {
418                        Log.d(TAG, "Binding service connection for target " + dri
419                                + " intent " + serviceIntent);
420                    }
421                    mServiceConnections.add(conn);
422                    targetsToQuery++;
423                }
424            }
425            if (targetsToQuery >= QUERY_TARGET_SERVICE_LIMIT) {
426                if (DEBUG) Log.d(TAG, "queryTargets hit query target limit "
427                        + QUERY_TARGET_SERVICE_LIMIT);
428                break;
429            }
430        }
431
432        if (!mServiceConnections.isEmpty()) {
433            if (DEBUG) Log.d(TAG, "queryTargets setting watchdog timer for "
434                    + WATCHDOG_TIMEOUT_MILLIS + "ms");
435            mChooserHandler.sendEmptyMessageDelayed(CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT,
436                    WATCHDOG_TIMEOUT_MILLIS);
437        } else {
438            sendVoiceChoicesIfNeeded();
439        }
440    }
441
442    private String convertServiceName(String packageName, String serviceName) {
443        if (TextUtils.isEmpty(serviceName)) {
444            return null;
445        }
446
447        final String fullName;
448        if (serviceName.startsWith(".")) {
449            // Relative to the app package. Prepend the app package name.
450            fullName = packageName + serviceName;
451        } else if (serviceName.indexOf('.') >= 0) {
452            // Fully qualified package name.
453            fullName = serviceName;
454        } else {
455            fullName = null;
456        }
457        return fullName;
458    }
459
460    void unbindRemainingServices() {
461        if (DEBUG) {
462            Log.d(TAG, "unbindRemainingServices, " + mServiceConnections.size() + " left");
463        }
464        for (int i = 0, N = mServiceConnections.size(); i < N; i++) {
465            final ChooserTargetServiceConnection conn = mServiceConnections.get(i);
466            if (DEBUG) Log.d(TAG, "unbinding " + conn);
467            unbindService(conn);
468            conn.destroy();
469        }
470        mServiceConnections.clear();
471        mChooserHandler.removeMessages(CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT);
472    }
473
474    void onSetupVoiceInteraction() {
475        // Do nothing. We'll send the voice stuff ourselves.
476    }
477
478    void onRefinementResult(TargetInfo selectedTarget, Intent matchingIntent) {
479        if (mRefinementResultReceiver != null) {
480            mRefinementResultReceiver.destroy();
481            mRefinementResultReceiver = null;
482        }
483
484        if (selectedTarget == null) {
485            Log.e(TAG, "Refinement result intent did not match any known targets; canceling");
486        } else if (!checkTargetSourceIntent(selectedTarget, matchingIntent)) {
487            Log.e(TAG, "onRefinementResult: Selected target " + selectedTarget
488                    + " cannot match refined source intent " + matchingIntent);
489        } else if (super.onTargetSelected(selectedTarget.cloneFilledIn(matchingIntent, 0), false)) {
490            finish();
491            return;
492        }
493        onRefinementCanceled();
494    }
495
496    void onRefinementCanceled() {
497        if (mRefinementResultReceiver != null) {
498            mRefinementResultReceiver.destroy();
499            mRefinementResultReceiver = null;
500        }
501        finish();
502    }
503
504    boolean checkTargetSourceIntent(TargetInfo target, Intent matchingIntent) {
505        final List<Intent> targetIntents = target.getAllSourceIntents();
506        for (int i = 0, N = targetIntents.size(); i < N; i++) {
507            final Intent targetIntent = targetIntents.get(i);
508            if (targetIntent.filterEquals(matchingIntent)) {
509                return true;
510            }
511        }
512        return false;
513    }
514
515    void filterServiceTargets(String packageName, List<ChooserTarget> targets) {
516        if (targets == null) {
517            return;
518        }
519
520        final PackageManager pm = getPackageManager();
521        for (int i = targets.size() - 1; i >= 0; i--) {
522            final ChooserTarget target = targets.get(i);
523            final ComponentName targetName = target.getComponentName();
524            if (packageName != null && packageName.equals(targetName.getPackageName())) {
525                // Anything from the original target's package is fine.
526                continue;
527            }
528
529            boolean remove;
530            try {
531                final ActivityInfo ai = pm.getActivityInfo(targetName, 0);
532                remove = !ai.exported || ai.permission != null;
533            } catch (NameNotFoundException e) {
534                Log.e(TAG, "Target " + target + " returned by " + packageName
535                        + " component not found");
536                remove = true;
537            }
538
539            if (remove) {
540                targets.remove(i);
541            }
542        }
543    }
544
545    @Override
546    ResolveListAdapter createAdapter(Context context, List<Intent> payloadIntents,
547            Intent[] initialIntents, List<ResolveInfo> rList, int launchedFromUid,
548            boolean filterLastUsed) {
549        final ChooserListAdapter adapter = new ChooserListAdapter(context, payloadIntents,
550                initialIntents, rList, launchedFromUid, filterLastUsed);
551        if (DEBUG) Log.d(TAG, "Adapter created; querying services");
552        queryTargetServices(adapter);
553        return adapter;
554    }
555
556    final class ChooserTargetInfo implements TargetInfo {
557        private final DisplayResolveInfo mSourceInfo;
558        private final ResolveInfo mBackupResolveInfo;
559        private final ChooserTarget mChooserTarget;
560        private Drawable mBadgeIcon = null;
561        private CharSequence mBadgeContentDescription;
562        private Drawable mDisplayIcon;
563        private final Intent mFillInIntent;
564        private final int mFillInFlags;
565        private final float mModifiedScore;
566
567        public ChooserTargetInfo(DisplayResolveInfo sourceInfo, ChooserTarget chooserTarget,
568                float modifiedScore) {
569            mSourceInfo = sourceInfo;
570            mChooserTarget = chooserTarget;
571            mModifiedScore = modifiedScore;
572            if (sourceInfo != null) {
573                final ResolveInfo ri = sourceInfo.getResolveInfo();
574                if (ri != null) {
575                    final ActivityInfo ai = ri.activityInfo;
576                    if (ai != null && ai.applicationInfo != null) {
577                        final PackageManager pm = getPackageManager();
578                        mBadgeIcon = pm.getApplicationIcon(ai.applicationInfo);
579                        mBadgeContentDescription = pm.getApplicationLabel(ai.applicationInfo);
580                    }
581                }
582            }
583            final Icon icon = chooserTarget.getIcon();
584            // TODO do this in the background
585            mDisplayIcon = icon != null ? icon.loadDrawable(ChooserActivity.this) : null;
586
587            if (sourceInfo != null) {
588                mBackupResolveInfo = null;
589            } else {
590                mBackupResolveInfo = getPackageManager().resolveActivity(getResolvedIntent(), 0);
591            }
592
593            mFillInIntent = null;
594            mFillInFlags = 0;
595        }
596
597        private ChooserTargetInfo(ChooserTargetInfo other, Intent fillInIntent, int flags) {
598            mSourceInfo = other.mSourceInfo;
599            mBackupResolveInfo = other.mBackupResolveInfo;
600            mChooserTarget = other.mChooserTarget;
601            mBadgeIcon = other.mBadgeIcon;
602            mBadgeContentDescription = other.mBadgeContentDescription;
603            mDisplayIcon = other.mDisplayIcon;
604            mFillInIntent = fillInIntent;
605            mFillInFlags = flags;
606            mModifiedScore = other.mModifiedScore;
607        }
608
609        public float getModifiedScore() {
610            return mModifiedScore;
611        }
612
613        @Override
614        public Intent getResolvedIntent() {
615            if (mSourceInfo != null) {
616                return mSourceInfo.getResolvedIntent();
617            }
618            return getTargetIntent();
619        }
620
621        @Override
622        public ComponentName getResolvedComponentName() {
623            if (mSourceInfo != null) {
624                return mSourceInfo.getResolvedComponentName();
625            } else if (mBackupResolveInfo != null) {
626                return new ComponentName(mBackupResolveInfo.activityInfo.packageName,
627                        mBackupResolveInfo.activityInfo.name);
628            }
629            return null;
630        }
631
632        private Intent getBaseIntentToSend() {
633            Intent result = mSourceInfo != null
634                    ? mSourceInfo.getResolvedIntent() : getTargetIntent();
635            if (result == null) {
636                Log.e(TAG, "ChooserTargetInfo: no base intent available to send");
637            } else {
638                result = new Intent(result);
639                if (mFillInIntent != null) {
640                    result.fillIn(mFillInIntent, mFillInFlags);
641                }
642                result.fillIn(mReferrerFillInIntent, 0);
643            }
644            return result;
645        }
646
647        @Override
648        public boolean start(Activity activity, Bundle options) {
649            throw new RuntimeException("ChooserTargets should be started as caller.");
650        }
651
652        @Override
653        public boolean startAsCaller(Activity activity, Bundle options, int userId) {
654            final Intent intent = getBaseIntentToSend();
655            if (intent == null) {
656                return false;
657            }
658            intent.setComponent(mChooserTarget.getComponentName());
659            intent.putExtras(mChooserTarget.getIntentExtras());
660            activity.startActivityAsCaller(intent, options, true, userId);
661            return true;
662        }
663
664        @Override
665        public boolean startAsUser(Activity activity, Bundle options, UserHandle user) {
666            throw new RuntimeException("ChooserTargets should be started as caller.");
667        }
668
669        @Override
670        public ResolveInfo getResolveInfo() {
671            return mSourceInfo != null ? mSourceInfo.getResolveInfo() : mBackupResolveInfo;
672        }
673
674        @Override
675        public CharSequence getDisplayLabel() {
676            return mChooserTarget.getTitle();
677        }
678
679        @Override
680        public CharSequence getExtendedInfo() {
681            // ChooserTargets have badge icons, so we won't show the extended info to disambiguate.
682            return null;
683        }
684
685        @Override
686        public Drawable getDisplayIcon() {
687            return mDisplayIcon;
688        }
689
690        @Override
691        public Drawable getBadgeIcon() {
692            return mBadgeIcon;
693        }
694
695        @Override
696        public CharSequence getBadgeContentDescription() {
697            return mBadgeContentDescription;
698        }
699
700        @Override
701        public TargetInfo cloneFilledIn(Intent fillInIntent, int flags) {
702            return new ChooserTargetInfo(this, fillInIntent, flags);
703        }
704
705        @Override
706        public List<Intent> getAllSourceIntents() {
707            final List<Intent> results = new ArrayList<>();
708            if (mSourceInfo != null) {
709                // We only queried the service for the first one in our sourceinfo.
710                results.add(mSourceInfo.getAllSourceIntents().get(0));
711            }
712            return results;
713        }
714    }
715
716    public class ChooserListAdapter extends ResolveListAdapter {
717        public static final int TARGET_BAD = -1;
718        public static final int TARGET_CALLER = 0;
719        public static final int TARGET_SERVICE = 1;
720        public static final int TARGET_STANDARD = 2;
721
722        private static final int MAX_SERVICE_TARGETS = 8;
723
724        private final List<ChooserTargetInfo> mServiceTargets = new ArrayList<>();
725        private final List<TargetInfo> mCallerTargets = new ArrayList<>();
726
727        private float mLateFee = 1.f;
728
729        private final BaseChooserTargetComparator mBaseTargetComparator
730                = new BaseChooserTargetComparator();
731
732        public ChooserListAdapter(Context context, List<Intent> payloadIntents,
733                Intent[] initialIntents, List<ResolveInfo> rList, int launchedFromUid,
734                boolean filterLastUsed) {
735            // Don't send the initial intents through the shared ResolverActivity path,
736            // we want to separate them into a different section.
737            super(context, payloadIntents, null, rList, launchedFromUid, filterLastUsed);
738
739            if (initialIntents != null) {
740                final PackageManager pm = getPackageManager();
741                for (int i = 0; i < initialIntents.length; i++) {
742                    final Intent ii = initialIntents[i];
743                    if (ii == null) {
744                        continue;
745                    }
746                    final ActivityInfo ai = ii.resolveActivityInfo(pm, 0);
747                    if (ai == null) {
748                        Log.w(TAG, "No activity found for " + ii);
749                        continue;
750                    }
751                    ResolveInfo ri = new ResolveInfo();
752                    ri.activityInfo = ai;
753                    UserManager userManager =
754                            (UserManager) getSystemService(Context.USER_SERVICE);
755                    if (ii instanceof LabeledIntent) {
756                        LabeledIntent li = (LabeledIntent)ii;
757                        ri.resolvePackageName = li.getSourcePackage();
758                        ri.labelRes = li.getLabelResource();
759                        ri.nonLocalizedLabel = li.getNonLocalizedLabel();
760                        ri.icon = li.getIconResource();
761                        ri.iconResourceId = ri.icon;
762                    }
763                    if (userManager.isManagedProfile()) {
764                        ri.noResourceId = true;
765                        ri.icon = 0;
766                    }
767                    mCallerTargets.add(new DisplayResolveInfo(ii, ri,
768                            ri.loadLabel(pm), null, ii));
769                }
770            }
771        }
772
773        @Override
774        public boolean showsExtendedInfo(TargetInfo info) {
775            // We have badges so we don't need this text shown.
776            return false;
777        }
778
779        @Override
780        public View onCreateView(ViewGroup parent) {
781            return mInflater.inflate(
782                    com.android.internal.R.layout.resolve_grid_item, parent, false);
783        }
784
785        @Override
786        public void onListRebuilt() {
787            if (mServiceTargets != null) {
788                pruneServiceTargets();
789            }
790        }
791
792        @Override
793        public boolean shouldGetResolvedFilter() {
794            return true;
795        }
796
797        @Override
798        public int getCount() {
799            return super.getCount() + getServiceTargetCount() + getCallerTargetCount();
800        }
801
802        @Override
803        public int getUnfilteredCount() {
804            return super.getUnfilteredCount() + getServiceTargetCount() + getCallerTargetCount();
805        }
806
807        public int getCallerTargetCount() {
808            return mCallerTargets.size();
809        }
810
811        public int getServiceTargetCount() {
812            return Math.min(mServiceTargets.size(), MAX_SERVICE_TARGETS);
813        }
814
815        public int getStandardTargetCount() {
816            return super.getCount();
817        }
818
819        public int getPositionTargetType(int position) {
820            int offset = 0;
821
822            final int callerTargetCount = getCallerTargetCount();
823            if (position < callerTargetCount) {
824                return TARGET_CALLER;
825            }
826            offset += callerTargetCount;
827
828            final int serviceTargetCount = getServiceTargetCount();
829            if (position - offset < serviceTargetCount) {
830                return TARGET_SERVICE;
831            }
832            offset += serviceTargetCount;
833
834            final int standardTargetCount = super.getCount();
835            if (position - offset < standardTargetCount) {
836                return TARGET_STANDARD;
837            }
838
839            return TARGET_BAD;
840        }
841
842        @Override
843        public TargetInfo getItem(int position) {
844            return targetInfoForPosition(position, true);
845        }
846
847        @Override
848        public TargetInfo targetInfoForPosition(int position, boolean filtered) {
849            int offset = 0;
850
851            final int callerTargetCount = getCallerTargetCount();
852            if (position < callerTargetCount) {
853                return mCallerTargets.get(position);
854            }
855            offset += callerTargetCount;
856
857            final int serviceTargetCount = getServiceTargetCount();
858            if (position - offset < serviceTargetCount) {
859                return mServiceTargets.get(position - offset);
860            }
861            offset += serviceTargetCount;
862
863            return filtered ? super.getItem(position - offset)
864                    : getDisplayInfoAt(position - offset);
865        }
866
867        public void addServiceResults(DisplayResolveInfo origTarget, List<ChooserTarget> targets) {
868            if (DEBUG) Log.d(TAG, "addServiceResults " + origTarget + ", " + targets.size()
869                    + " targets");
870            final float parentScore = getScore(origTarget);
871            Collections.sort(targets, mBaseTargetComparator);
872            float lastScore = 0;
873            for (int i = 0, N = targets.size(); i < N; i++) {
874                final ChooserTarget target = targets.get(i);
875                float targetScore = target.getScore();
876                targetScore *= parentScore;
877                targetScore *= mLateFee;
878                if (i > 0 && targetScore >= lastScore) {
879                    // Apply a decay so that the top app can't crowd out everything else.
880                    // This incents ChooserTargetServices to define what's truly better.
881                    targetScore = lastScore * 0.95f;
882                }
883                insertServiceTarget(new ChooserTargetInfo(origTarget, target, targetScore));
884
885                if (DEBUG) {
886                    Log.d(TAG, " => " + target.toString() + " score=" + targetScore
887                            + " base=" + target.getScore()
888                            + " lastScore=" + lastScore
889                            + " parentScore=" + parentScore
890                            + " lateFee=" + mLateFee);
891                }
892
893                lastScore = targetScore;
894            }
895
896            mLateFee *= 0.95f;
897
898            notifyDataSetChanged();
899        }
900
901        private void insertServiceTarget(ChooserTargetInfo chooserTargetInfo) {
902            final float newScore = chooserTargetInfo.getModifiedScore();
903            for (int i = 0, N = mServiceTargets.size(); i < N; i++) {
904                final ChooserTargetInfo serviceTarget = mServiceTargets.get(i);
905                if (newScore > serviceTarget.getModifiedScore()) {
906                    mServiceTargets.add(i, chooserTargetInfo);
907                    return;
908                }
909            }
910            mServiceTargets.add(chooserTargetInfo);
911        }
912
913        private void pruneServiceTargets() {
914            if (DEBUG) Log.d(TAG, "pruneServiceTargets");
915            for (int i = mServiceTargets.size() - 1; i >= 0; i--) {
916                final ChooserTargetInfo cti = mServiceTargets.get(i);
917                if (!hasResolvedTarget(cti.getResolveInfo())) {
918                    if (DEBUG) Log.d(TAG, " => " + i + " " + cti);
919                    mServiceTargets.remove(i);
920                }
921            }
922        }
923    }
924
925    static class BaseChooserTargetComparator implements Comparator<ChooserTarget> {
926        @Override
927        public int compare(ChooserTarget lhs, ChooserTarget rhs) {
928            // Descending order
929            return (int) Math.signum(rhs.getScore() - lhs.getScore());
930        }
931    }
932
933    static class RowScale {
934        private static final int DURATION = 400;
935
936        float mScale;
937        ChooserRowAdapter mAdapter;
938        private final ObjectAnimator mAnimator;
939
940        public static final FloatProperty<RowScale> PROPERTY =
941                new FloatProperty<RowScale>("scale") {
942            @Override
943            public void setValue(RowScale object, float value) {
944                object.mScale = value;
945                object.mAdapter.notifyDataSetChanged();
946            }
947
948            @Override
949            public Float get(RowScale object) {
950                return object.mScale;
951            }
952        };
953
954        public RowScale(@NonNull ChooserRowAdapter adapter, float from, float to) {
955            mAdapter = adapter;
956            mScale = from;
957            if (from == to) {
958                mAnimator = null;
959                return;
960            }
961
962            mAnimator = ObjectAnimator.ofFloat(this, PROPERTY, from, to).setDuration(DURATION);
963        }
964
965        public RowScale setInterpolator(Interpolator interpolator) {
966            if (mAnimator != null) {
967                mAnimator.setInterpolator(interpolator);
968            }
969            return this;
970        }
971
972        public float get() {
973            return mScale;
974        }
975
976        public void startAnimation() {
977            if (mAnimator != null) {
978                mAnimator.start();
979            }
980        }
981
982        public void cancelAnimation() {
983            if (mAnimator != null) {
984                mAnimator.cancel();
985            }
986        }
987    }
988
989    class ChooserRowAdapter extends BaseAdapter {
990        private ChooserListAdapter mChooserListAdapter;
991        private final LayoutInflater mLayoutInflater;
992        private final int mColumnCount = 4;
993        private RowScale[] mServiceTargetScale;
994        private final Interpolator mInterpolator;
995
996        public ChooserRowAdapter(ChooserListAdapter wrappedAdapter) {
997            mChooserListAdapter = wrappedAdapter;
998            mLayoutInflater = LayoutInflater.from(ChooserActivity.this);
999
1000            mInterpolator = AnimationUtils.loadInterpolator(ChooserActivity.this,
1001                    android.R.interpolator.decelerate_quint);
1002
1003            wrappedAdapter.registerDataSetObserver(new DataSetObserver() {
1004                @Override
1005                public void onChanged() {
1006                    super.onChanged();
1007                    final int rcount = getServiceTargetRowCount();
1008                    if (mServiceTargetScale == null
1009                            || mServiceTargetScale.length != rcount) {
1010                        RowScale[] old = mServiceTargetScale;
1011                        int oldRCount = old != null ? old.length : 0;
1012                        mServiceTargetScale = new RowScale[rcount];
1013                        if (old != null && rcount > 0) {
1014                            System.arraycopy(old, 0, mServiceTargetScale, 0,
1015                                    Math.min(old.length, rcount));
1016                        }
1017
1018                        for (int i = rcount; i < oldRCount; i++) {
1019                            old[i].cancelAnimation();
1020                        }
1021
1022                        for (int i = oldRCount; i < rcount; i++) {
1023                            final RowScale rs = new RowScale(ChooserRowAdapter.this, 0.f, 1.f)
1024                                    .setInterpolator(mInterpolator);
1025                            mServiceTargetScale[i] = rs;
1026                        }
1027
1028                        // Start the animations in a separate loop.
1029                        // The process of starting animations will result in
1030                        // binding views to set up initial values, and we must
1031                        // have ALL of the new RowScale objects created above before
1032                        // we get started.
1033                        for (int i = oldRCount; i < rcount; i++) {
1034                            mServiceTargetScale[i].startAnimation();
1035                        }
1036                    }
1037
1038                    notifyDataSetChanged();
1039                }
1040
1041                @Override
1042                public void onInvalidated() {
1043                    super.onInvalidated();
1044                    notifyDataSetInvalidated();
1045                    if (mServiceTargetScale != null) {
1046                        for (RowScale rs : mServiceTargetScale) {
1047                            rs.cancelAnimation();
1048                        }
1049                    }
1050                }
1051            });
1052        }
1053
1054        private float getRowScale(int rowPosition) {
1055            final int start = getCallerTargetRowCount();
1056            final int end = start + getServiceTargetRowCount();
1057            if (rowPosition >= start && rowPosition < end) {
1058                return mServiceTargetScale[rowPosition - start].get();
1059            }
1060            return 1.f;
1061        }
1062
1063        @Override
1064        public int getCount() {
1065            return (int) (
1066                    getCallerTargetRowCount()
1067                    + getServiceTargetRowCount()
1068                    + Math.ceil((float) mChooserListAdapter.getStandardTargetCount() / mColumnCount)
1069            );
1070        }
1071
1072        public int getCallerTargetRowCount() {
1073            return (int) Math.ceil(
1074                    (float) mChooserListAdapter.getCallerTargetCount() / mColumnCount);
1075        }
1076
1077        public int getServiceTargetRowCount() {
1078            return (int) Math.ceil(
1079                    (float) mChooserListAdapter.getServiceTargetCount() / mColumnCount);
1080        }
1081
1082        @Override
1083        public Object getItem(int position) {
1084            // We have nothing useful to return here.
1085            return position;
1086        }
1087
1088        @Override
1089        public long getItemId(int position) {
1090            return position;
1091        }
1092
1093        @Override
1094        public View getView(int position, View convertView, ViewGroup parent) {
1095            final RowViewHolder holder;
1096            if (convertView == null) {
1097                holder = createViewHolder(parent);
1098            } else {
1099                holder = (RowViewHolder) convertView.getTag();
1100            }
1101            bindViewHolder(position, holder);
1102
1103            return holder.row;
1104        }
1105
1106        RowViewHolder createViewHolder(ViewGroup parent) {
1107            final ViewGroup row = (ViewGroup) mLayoutInflater.inflate(R.layout.chooser_row,
1108                    parent, false);
1109            final RowViewHolder holder = new RowViewHolder(row, mColumnCount);
1110            final int spec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
1111
1112            for (int i = 0; i < mColumnCount; i++) {
1113                final View v = mChooserListAdapter.createView(row);
1114                final int column = i;
1115                v.setOnClickListener(new OnClickListener() {
1116                    @Override
1117                    public void onClick(View v) {
1118                        startSelected(holder.itemIndices[column], false, true);
1119                    }
1120                });
1121                v.setOnLongClickListener(new OnLongClickListener() {
1122                    @Override
1123                    public boolean onLongClick(View v) {
1124                        showAppDetails(
1125                                mChooserListAdapter.resolveInfoForPosition(
1126                                        holder.itemIndices[column], true));
1127                        return true;
1128                    }
1129                });
1130                row.addView(v);
1131                holder.cells[i] = v;
1132
1133                // Force height to be a given so we don't have visual disruption during scaling.
1134                LayoutParams lp = v.getLayoutParams();
1135                v.measure(spec, spec);
1136                if (lp == null) {
1137                    lp = new LayoutParams(LayoutParams.MATCH_PARENT, v.getMeasuredHeight());
1138                    row.setLayoutParams(lp);
1139                } else {
1140                    lp.height = v.getMeasuredHeight();
1141                }
1142            }
1143
1144            // Pre-measure so we can scale later.
1145            holder.measure();
1146            LayoutParams lp = row.getLayoutParams();
1147            if (lp == null) {
1148                lp = new LayoutParams(LayoutParams.MATCH_PARENT, holder.measuredRowHeight);
1149                row.setLayoutParams(lp);
1150            } else {
1151                lp.height = holder.measuredRowHeight;
1152            }
1153            row.setTag(holder);
1154            return holder;
1155        }
1156
1157        void bindViewHolder(int rowPosition, RowViewHolder holder) {
1158            final int start = getFirstRowPosition(rowPosition);
1159            final int startType = mChooserListAdapter.getPositionTargetType(start);
1160
1161            int end = start + mColumnCount - 1;
1162            while (mChooserListAdapter.getPositionTargetType(end) != startType && end >= start) {
1163                end--;
1164            }
1165
1166            if (startType == ChooserListAdapter.TARGET_SERVICE) {
1167                holder.row.setBackgroundColor(
1168                        getColor(R.color.chooser_service_row_background_color));
1169            } else {
1170                holder.row.setBackgroundColor(Color.TRANSPARENT);
1171            }
1172
1173            final int oldHeight = holder.row.getLayoutParams().height;
1174            holder.row.getLayoutParams().height = Math.max(1,
1175                    (int) (holder.measuredRowHeight * getRowScale(rowPosition)));
1176            if (holder.row.getLayoutParams().height != oldHeight) {
1177                holder.row.requestLayout();
1178            }
1179
1180            for (int i = 0; i < mColumnCount; i++) {
1181                final View v = holder.cells[i];
1182                if (start + i <= end) {
1183                    v.setVisibility(View.VISIBLE);
1184                    holder.itemIndices[i] = start + i;
1185                    mChooserListAdapter.bindView(holder.itemIndices[i], v);
1186                } else {
1187                    v.setVisibility(View.GONE);
1188                }
1189            }
1190        }
1191
1192        int getFirstRowPosition(int row) {
1193            final int callerCount = mChooserListAdapter.getCallerTargetCount();
1194            final int callerRows = (int) Math.ceil((float) callerCount / mColumnCount);
1195
1196            if (row < callerRows) {
1197                return row * mColumnCount;
1198            }
1199
1200            final int serviceCount = mChooserListAdapter.getServiceTargetCount();
1201            final int serviceRows = (int) Math.ceil((float) serviceCount / mColumnCount);
1202
1203            if (row < callerRows + serviceRows) {
1204                return callerCount + (row - callerRows) * mColumnCount;
1205            }
1206
1207            return callerCount + serviceCount
1208                    + (row - callerRows - serviceRows) * mColumnCount;
1209        }
1210    }
1211
1212    static class RowViewHolder {
1213        final View[] cells;
1214        final ViewGroup row;
1215        int measuredRowHeight;
1216        int[] itemIndices;
1217
1218        public RowViewHolder(ViewGroup row, int cellCount) {
1219            this.row = row;
1220            this.cells = new View[cellCount];
1221            this.itemIndices = new int[cellCount];
1222        }
1223
1224        public void measure() {
1225            final int spec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
1226            row.measure(spec, spec);
1227            measuredRowHeight = row.getMeasuredHeight();
1228        }
1229    }
1230
1231    static class ChooserTargetServiceConnection implements ServiceConnection {
1232        private final DisplayResolveInfo mOriginalTarget;
1233        private ComponentName mConnectedComponent;
1234        private ChooserActivity mChooserActivity;
1235        private final Object mLock = new Object();
1236
1237        private final IChooserTargetResult mChooserTargetResult = new IChooserTargetResult.Stub() {
1238            @Override
1239            public void sendResult(List<ChooserTarget> targets) throws RemoteException {
1240                synchronized (mLock) {
1241                    if (mChooserActivity == null) {
1242                        Log.e(TAG, "destroyed ChooserTargetServiceConnection received result from "
1243                                + mConnectedComponent + "; ignoring...");
1244                        return;
1245                    }
1246                    mChooserActivity.filterServiceTargets(
1247                            mOriginalTarget.getResolveInfo().activityInfo.packageName, targets);
1248                    final Message msg = Message.obtain();
1249                    msg.what = CHOOSER_TARGET_SERVICE_RESULT;
1250                    msg.obj = new ServiceResultInfo(mOriginalTarget, targets,
1251                            ChooserTargetServiceConnection.this);
1252                    mChooserActivity.mChooserHandler.sendMessage(msg);
1253                }
1254            }
1255        };
1256
1257        public ChooserTargetServiceConnection(ChooserActivity chooserActivity,
1258                DisplayResolveInfo dri) {
1259            mChooserActivity = chooserActivity;
1260            mOriginalTarget = dri;
1261        }
1262
1263        @Override
1264        public void onServiceConnected(ComponentName name, IBinder service) {
1265            if (DEBUG) Log.d(TAG, "onServiceConnected: " + name);
1266            synchronized (mLock) {
1267                if (mChooserActivity == null) {
1268                    Log.e(TAG, "destroyed ChooserTargetServiceConnection got onServiceConnected");
1269                    return;
1270                }
1271
1272                final IChooserTargetService icts = IChooserTargetService.Stub.asInterface(service);
1273                try {
1274                    icts.getChooserTargets(mOriginalTarget.getResolvedComponentName(),
1275                            mOriginalTarget.getResolveInfo().filter, mChooserTargetResult);
1276                } catch (RemoteException e) {
1277                    Log.e(TAG, "Querying ChooserTargetService " + name + " failed.", e);
1278                    mChooserActivity.unbindService(this);
1279                    destroy();
1280                    mChooserActivity.mServiceConnections.remove(this);
1281                }
1282            }
1283        }
1284
1285        @Override
1286        public void onServiceDisconnected(ComponentName name) {
1287            if (DEBUG) Log.d(TAG, "onServiceDisconnected: " + name);
1288            synchronized (mLock) {
1289                if (mChooserActivity == null) {
1290                    Log.e(TAG,
1291                            "destroyed ChooserTargetServiceConnection got onServiceDisconnected");
1292                    return;
1293                }
1294
1295                mChooserActivity.unbindService(this);
1296                destroy();
1297                mChooserActivity.mServiceConnections.remove(this);
1298                if (mChooserActivity.mServiceConnections.isEmpty()) {
1299                    mChooserActivity.mChooserHandler.removeMessages(
1300                            CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT);
1301                    mChooserActivity.sendVoiceChoicesIfNeeded();
1302                }
1303                mConnectedComponent = null;
1304            }
1305        }
1306
1307        public void destroy() {
1308            synchronized (mLock) {
1309                mChooserActivity = null;
1310            }
1311        }
1312
1313        @Override
1314        public String toString() {
1315            return "ChooserTargetServiceConnection{service="
1316                    + mConnectedComponent + ", activity="
1317                    + mOriginalTarget.getResolveInfo().activityInfo.toString() + "}";
1318        }
1319    }
1320
1321    static class ServiceResultInfo {
1322        public final DisplayResolveInfo originalTarget;
1323        public final List<ChooserTarget> resultTargets;
1324        public final ChooserTargetServiceConnection connection;
1325
1326        public ServiceResultInfo(DisplayResolveInfo ot, List<ChooserTarget> rt,
1327                ChooserTargetServiceConnection c) {
1328            originalTarget = ot;
1329            resultTargets = rt;
1330            connection = c;
1331        }
1332    }
1333
1334    static class RefinementResultReceiver extends ResultReceiver {
1335        private ChooserActivity mChooserActivity;
1336        private TargetInfo mSelectedTarget;
1337
1338        public RefinementResultReceiver(ChooserActivity host, TargetInfo target,
1339                Handler handler) {
1340            super(handler);
1341            mChooserActivity = host;
1342            mSelectedTarget = target;
1343        }
1344
1345        @Override
1346        protected void onReceiveResult(int resultCode, Bundle resultData) {
1347            if (mChooserActivity == null) {
1348                Log.e(TAG, "Destroyed RefinementResultReceiver received a result");
1349                return;
1350            }
1351            if (resultData == null) {
1352                Log.e(TAG, "RefinementResultReceiver received null resultData");
1353                return;
1354            }
1355
1356            switch (resultCode) {
1357                case RESULT_CANCELED:
1358                    mChooserActivity.onRefinementCanceled();
1359                    break;
1360                case RESULT_OK:
1361                    Parcelable intentParcelable = resultData.getParcelable(Intent.EXTRA_INTENT);
1362                    if (intentParcelable instanceof Intent) {
1363                        mChooserActivity.onRefinementResult(mSelectedTarget,
1364                                (Intent) intentParcelable);
1365                    } else {
1366                        Log.e(TAG, "RefinementResultReceiver received RESULT_OK but no Intent"
1367                                + " in resultData with key Intent.EXTRA_INTENT");
1368                    }
1369                    break;
1370                default:
1371                    Log.w(TAG, "Unknown result code " + resultCode
1372                            + " sent to RefinementResultReceiver");
1373                    break;
1374            }
1375        }
1376
1377        public void destroy() {
1378            mChooserActivity = null;
1379            mSelectedTarget = null;
1380        }
1381    }
1382
1383    class OffsetDataSetObserver extends DataSetObserver {
1384        private final AbsListView mListView;
1385        private int mCachedViewType = -1;
1386        private View mCachedView;
1387
1388        public OffsetDataSetObserver(AbsListView listView) {
1389            mListView = listView;
1390        }
1391
1392        @Override
1393        public void onChanged() {
1394            if (mResolverDrawerLayout == null) {
1395                return;
1396            }
1397
1398            final int chooserTargetRows = mChooserRowAdapter.getServiceTargetRowCount();
1399            int offset = 0;
1400            for (int i = 0; i < chooserTargetRows; i++)  {
1401                final int pos = mChooserRowAdapter.getCallerTargetRowCount() + i;
1402                final int vt = mChooserRowAdapter.getItemViewType(pos);
1403                if (vt != mCachedViewType) {
1404                    mCachedView = null;
1405                }
1406                final View v = mChooserRowAdapter.getView(pos, mCachedView, mListView);
1407                int height = ((RowViewHolder) (v.getTag())).measuredRowHeight;
1408
1409                offset += (int) (height * mChooserRowAdapter.getRowScale(pos));
1410
1411                if (vt >= 0) {
1412                    mCachedViewType = vt;
1413                    mCachedView = v;
1414                } else {
1415                    mCachedViewType = -1;
1416                }
1417            }
1418
1419            mResolverDrawerLayout.setCollapsibleHeightReserved(offset);
1420        }
1421    }
1422}
1423