ChooserActivity.java revision b431d715a3f266f0ce76453ec42d96b2763f41a1 
1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.internal.app;
18
19import android.animation.ObjectAnimator;
20import android.annotation.NonNull;
21import android.app.Activity;
22import android.app.usage.UsageStatsManager;
23import android.content.ComponentName;
24import android.content.Context;
25import android.content.Intent;
26import android.content.IntentSender;
27import android.content.IntentSender.SendIntentException;
28import android.content.ServiceConnection;
29import android.content.SharedPreferences;
30import android.content.pm.ActivityInfo;
31import android.content.pm.LabeledIntent;
32import android.content.pm.PackageManager;
33import android.content.pm.PackageManager.NameNotFoundException;
34import android.content.pm.ResolveInfo;
35import android.database.DataSetObserver;
36import android.graphics.Color;
37import android.graphics.drawable.Drawable;
38import android.graphics.drawable.Icon;
39import android.os.Bundle;
40import android.os.Environment;
41import android.os.Handler;
42import android.os.IBinder;
43import android.os.Message;
44import android.os.Parcelable;
45import android.os.Process;
46import android.os.RemoteException;
47import android.os.ResultReceiver;
48import android.os.UserHandle;
49import android.os.UserManager;
50import android.os.storage.StorageManager;
51import android.service.chooser.ChooserTarget;
52import android.service.chooser.ChooserTargetService;
53import android.service.chooser.IChooserTargetResult;
54import android.service.chooser.IChooserTargetService;
55import android.text.TextUtils;
56import android.util.FloatProperty;
57import android.util.Log;
58import android.util.Slog;
59import android.view.LayoutInflater;
60import android.view.View;
61import android.view.View.MeasureSpec;
62import android.view.View.OnClickListener;
63import android.view.View.OnLongClickListener;
64import android.view.ViewGroup;
65import android.view.ViewGroup.LayoutParams;
66import android.view.animation.AnimationUtils;
67import android.view.animation.Interpolator;
68import android.widget.AbsListView;
69import android.widget.BaseAdapter;
70import android.widget.ListView;
71import com.android.internal.R;
72import com.android.internal.app.ResolverActivity.TargetInfo;
73import com.android.internal.logging.MetricsLogger;
74import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
75import com.google.android.collect.Lists;
76
77import java.io.File;
78import java.util.ArrayList;
79import java.util.Collections;
80import java.util.Comparator;
81import java.util.List;
82
83public class ChooserActivity extends ResolverActivity {
84    private static final String TAG = "ChooserActivity";
85
86    private static final boolean DEBUG = false;
87
88    private static final int QUERY_TARGET_SERVICE_LIMIT = 5;
89    private static final int WATCHDOG_TIMEOUT_MILLIS = 5000;
90
91    private Bundle mReplacementExtras;
92    private IntentSender mChosenComponentSender;
93    private IntentSender mRefinementIntentSender;
94    private RefinementResultReceiver mRefinementResultReceiver;
95    private ChooserTarget[] mCallerChooserTargets;
96
97    private Intent mReferrerFillInIntent;
98
99    private ChooserListAdapter mChooserListAdapter;
100    private ChooserRowAdapter mChooserRowAdapter;
101
102    private SharedPreferences mPinnedSharedPrefs;
103    private static final float PINNED_TARGET_SCORE_BOOST = 1000.f;
104    private static final float CALLER_TARGET_SCORE_BOOST = 900.f;
105    private static final String PINNED_SHARED_PREFS_NAME = "chooser_pin_settings";
106    private static final String TARGET_DETAILS_FRAGMENT_TAG = "targetDetailsFragment";
107
108    private final List<ChooserTargetServiceConnection> mServiceConnections = new ArrayList<>();
109
110    private static final int CHOOSER_TARGET_SERVICE_RESULT = 1;
111    private static final int CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT = 2;
112
113    private final Handler mChooserHandler = new Handler() {
114        @Override
115        public void handleMessage(Message msg) {
116            switch (msg.what) {
117                case CHOOSER_TARGET_SERVICE_RESULT:
118                    if (DEBUG) Log.d(TAG, "CHOOSER_TARGET_SERVICE_RESULT");
119                    if (isDestroyed()) break;
120                    final ServiceResultInfo sri = (ServiceResultInfo) msg.obj;
121                    if (!mServiceConnections.contains(sri.connection)) {
122                        Log.w(TAG, "ChooserTargetServiceConnection " + sri.connection
123                                + " returned after being removed from active connections."
124                                + " Have you considered returning results faster?");
125                        break;
126                    }
127                    if (sri.resultTargets != null) {
128                        mChooserListAdapter.addServiceResults(sri.originalTarget,
129                                sri.resultTargets);
130                    }
131                    unbindService(sri.connection);
132                    sri.connection.destroy();
133                    mServiceConnections.remove(sri.connection);
134                    if (mServiceConnections.isEmpty()) {
135                        mChooserHandler.removeMessages(CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT);
136                        sendVoiceChoicesIfNeeded();
137                        mChooserListAdapter.setShowServiceTargets(true);
138                    }
139                    break;
140
141                case CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT:
142                    if (DEBUG) {
143                        Log.d(TAG, "CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT; unbinding services");
144                    }
145                    unbindRemainingServices();
146                    sendVoiceChoicesIfNeeded();
147                    mChooserListAdapter.setShowServiceTargets(true);
148                    break;
149
150                default:
151                    super.handleMessage(msg);
152            }
153        }
154    };
155
156    @Override
157    protected void onCreate(Bundle savedInstanceState) {
158        Intent intent = getIntent();
159        Parcelable targetParcelable = intent.getParcelableExtra(Intent.EXTRA_INTENT);
160        if (!(targetParcelable instanceof Intent)) {
161            Log.w("ChooserActivity", "Target is not an intent: " + targetParcelable);
162            finish();
163            super.onCreate(null);
164            return;
165        }
166        Intent target = (Intent) targetParcelable;
167        if (target != null) {
168            modifyTargetIntent(target);
169        }
170        Parcelable[] targetsParcelable
171                = intent.getParcelableArrayExtra(Intent.EXTRA_ALTERNATE_INTENTS);
172        if (targetsParcelable != null) {
173            final boolean offset = target == null;
174            Intent[] additionalTargets =
175                    new Intent[offset ? targetsParcelable.length - 1 : targetsParcelable.length];
176            for (int i = 0; i < targetsParcelable.length; i++) {
177                if (!(targetsParcelable[i] instanceof Intent)) {
178                    Log.w(TAG, "EXTRA_ALTERNATE_INTENTS array entry #" + i + " is not an Intent: "
179                            + targetsParcelable[i]);
180                    finish();
181                    super.onCreate(null);
182                    return;
183                }
184                final Intent additionalTarget = (Intent) targetsParcelable[i];
185                if (i == 0 && target == null) {
186                    target = additionalTarget;
187                    modifyTargetIntent(target);
188                } else {
189                    additionalTargets[offset ? i - 1 : i] = additionalTarget;
190                    modifyTargetIntent(additionalTarget);
191                }
192            }
193            setAdditionalTargets(additionalTargets);
194        }
195
196        mReplacementExtras = intent.getBundleExtra(Intent.EXTRA_REPLACEMENT_EXTRAS);
197        CharSequence title = intent.getCharSequenceExtra(Intent.EXTRA_TITLE);
198        int defaultTitleRes = 0;
199        if (title == null) {
200            defaultTitleRes = com.android.internal.R.string.chooseActivity;
201        }
202        Parcelable[] pa = intent.getParcelableArrayExtra(Intent.EXTRA_INITIAL_INTENTS);
203        Intent[] initialIntents = null;
204        if (pa != null) {
205            initialIntents = new Intent[pa.length];
206            for (int i=0; i<pa.length; i++) {
207                if (!(pa[i] instanceof Intent)) {
208                    Log.w(TAG, "Initial intent #" + i + " not an Intent: " + pa[i]);
209                    finish();
210                    super.onCreate(null);
211                    return;
212                }
213                final Intent in = (Intent) pa[i];
214                modifyTargetIntent(in);
215                initialIntents[i] = in;
216            }
217        }
218
219        mReferrerFillInIntent = new Intent().putExtra(Intent.EXTRA_REFERRER, getReferrer());
220
221        mChosenComponentSender = intent.getParcelableExtra(
222                Intent.EXTRA_CHOSEN_COMPONENT_INTENT_SENDER);
223        mRefinementIntentSender = intent.getParcelableExtra(
224                Intent.EXTRA_CHOOSER_REFINEMENT_INTENT_SENDER);
225        setSafeForwardingMode(true);
226
227        pa = intent.getParcelableArrayExtra(Intent.EXTRA_EXCLUDE_COMPONENTS);
228        if (pa != null) {
229            ComponentName[] names = new ComponentName[pa.length];
230            for (int i = 0; i < pa.length; i++) {
231                if (!(pa[i] instanceof ComponentName)) {
232                    Log.w(TAG, "Filtered component #" + i + " not a ComponentName: " + pa[i]);
233                    names = null;
234                    break;
235                }
236                names[i] = (ComponentName) pa[i];
237            }
238            setFilteredComponents(names);
239        }
240
241        pa = intent.getParcelableArrayExtra(Intent.EXTRA_CHOOSER_TARGETS);
242        if (pa != null) {
243            ChooserTarget[] targets = new ChooserTarget[pa.length];
244            for (int i = 0; i < pa.length; i++) {
245                if (!(pa[i] instanceof ChooserTarget)) {
246                    Log.w(TAG, "Chooser target #" + i + " not a ChooserTarget: " + pa[i]);
247                    targets = null;
248                    break;
249                }
250                targets[i] = (ChooserTarget) pa[i];
251            }
252            mCallerChooserTargets = targets;
253        }
254
255        mPinnedSharedPrefs = getPinnedSharedPrefs(this);
256        super.onCreate(savedInstanceState, target, title, defaultTitleRes, initialIntents,
257                null, false);
258
259        MetricsLogger.action(this, MetricsEvent.ACTION_ACTIVITY_CHOOSER_SHOWN);
260    }
261
262    static SharedPreferences getPinnedSharedPrefs(Context context) {
263        // The code below is because in the android:ui process, no one can hear you scream.
264        // The package info in the context isn't initialized in the way it is for normal apps,
265        // so the standard, name-based context.getSharedPreferences doesn't work. Instead, we
266        // build the path manually below using the same policy that appears in ContextImpl.
267        // This fails silently under the hood if there's a problem, so if we find ourselves in
268        // the case where we don't have access to credential encrypted storage we just won't
269        // have our pinned target info.
270        final File prefsFile = new File(new File(
271                Environment.getDataUserCePackageDirectory(StorageManager.UUID_PRIVATE_INTERNAL,
272                        context.getUserId(), context.getPackageName()),
273                "shared_prefs"),
274                PINNED_SHARED_PREFS_NAME + ".xml");
275        return context.getSharedPreferences(prefsFile, MODE_PRIVATE);
276    }
277
278    @Override
279    protected void onDestroy() {
280        super.onDestroy();
281        if (mRefinementResultReceiver != null) {
282            mRefinementResultReceiver.destroy();
283            mRefinementResultReceiver = null;
284        }
285        unbindRemainingServices();
286        mChooserHandler.removeMessages(CHOOSER_TARGET_SERVICE_RESULT);
287    }
288
289    @Override
290    public Intent getReplacementIntent(ActivityInfo aInfo, Intent defIntent) {
291        Intent result = defIntent;
292        if (mReplacementExtras != null) {
293            final Bundle replExtras = mReplacementExtras.getBundle(aInfo.packageName);
294            if (replExtras != null) {
295                result = new Intent(defIntent);
296                result.putExtras(replExtras);
297            }
298        }
299        if (aInfo.name.equals(IntentForwarderActivity.FORWARD_INTENT_TO_PARENT)
300                || aInfo.name.equals(IntentForwarderActivity.FORWARD_INTENT_TO_MANAGED_PROFILE)) {
301            result = Intent.createChooser(result,
302                    getIntent().getCharSequenceExtra(Intent.EXTRA_TITLE));
303
304            // Don't auto-launch single intents if the intent is being forwarded. This is done
305            // because automatically launching a resolving application as a response to the user
306            // action of switching accounts is pretty unexpected.
307            result.putExtra(Intent.EXTRA_AUTO_LAUNCH_SINGLE_CHOICE, false);
308        }
309        return result;
310    }
311
312    @Override
313    public void onActivityStarted(TargetInfo cti) {
314        if (mChosenComponentSender != null) {
315            final ComponentName target = cti.getResolvedComponentName();
316            if (target != null) {
317                final Intent fillIn = new Intent().putExtra(Intent.EXTRA_CHOSEN_COMPONENT, target);
318                try {
319                    mChosenComponentSender.sendIntent(this, Activity.RESULT_OK, fillIn, null, null);
320                } catch (IntentSender.SendIntentException e) {
321                    Slog.e(TAG, "Unable to launch supplied IntentSender to report "
322                            + "the chosen component: " + e);
323                }
324            }
325        }
326    }
327
328    @Override
329    public void onPrepareAdapterView(AbsListView adapterView, ResolveListAdapter adapter,
330            boolean alwaysUseOption) {
331        final ListView listView = adapterView instanceof ListView ? (ListView) adapterView : null;
332        mChooserListAdapter = (ChooserListAdapter) adapter;
333        if (mCallerChooserTargets != null && mCallerChooserTargets.length > 0) {
334            mChooserListAdapter.addServiceResults(null, Lists.newArrayList(mCallerChooserTargets));
335        }
336        mChooserRowAdapter = new ChooserRowAdapter(mChooserListAdapter);
337        mChooserRowAdapter.registerDataSetObserver(new OffsetDataSetObserver(adapterView));
338        adapterView.setAdapter(mChooserRowAdapter);
339        if (listView != null) {
340            listView.setItemsCanFocus(true);
341        }
342    }
343
344    @Override
345    public int getLayoutResource() {
346        return R.layout.chooser_grid;
347    }
348
349    @Override
350    public boolean shouldGetActivityMetadata() {
351        return true;
352    }
353
354    @Override
355    public boolean shouldAutoLaunchSingleChoice(TargetInfo target) {
356        return getIntent().getBooleanExtra(Intent.EXTRA_AUTO_LAUNCH_SINGLE_CHOICE,
357                super.shouldAutoLaunchSingleChoice(target));
358    }
359
360    @Override
361    public void showTargetDetails(ResolveInfo ri) {
362        ComponentName name = ri.activityInfo.getComponentName();
363        boolean pinned = mPinnedSharedPrefs.getBoolean(name.flattenToString(), false);
364        ResolverTargetActionsDialogFragment f =
365                new ResolverTargetActionsDialogFragment(ri.loadLabel(getPackageManager()),
366                        name, pinned);
367        f.show(getFragmentManager(), TARGET_DETAILS_FRAGMENT_TAG);
368    }
369
370    private void modifyTargetIntent(Intent in) {
371        final String action = in.getAction();
372        if (Intent.ACTION_SEND.equals(action) ||
373                Intent.ACTION_SEND_MULTIPLE.equals(action)) {
374            in.addFlags(Intent.FLAG_ACTIVITY_NEW_DOCUMENT |
375                    Intent.FLAG_ACTIVITY_MULTIPLE_TASK);
376        }
377    }
378
379    @Override
380    protected boolean onTargetSelected(TargetInfo target, boolean alwaysCheck) {
381        if (mRefinementIntentSender != null) {
382            final Intent fillIn = new Intent();
383            final List<Intent> sourceIntents = target.getAllSourceIntents();
384            if (!sourceIntents.isEmpty()) {
385                fillIn.putExtra(Intent.EXTRA_INTENT, sourceIntents.get(0));
386                if (sourceIntents.size() > 1) {
387                    final Intent[] alts = new Intent[sourceIntents.size() - 1];
388                    for (int i = 1, N = sourceIntents.size(); i < N; i++) {
389                        alts[i - 1] = sourceIntents.get(i);
390                    }
391                    fillIn.putExtra(Intent.EXTRA_ALTERNATE_INTENTS, alts);
392                }
393                if (mRefinementResultReceiver != null) {
394                    mRefinementResultReceiver.destroy();
395                }
396                mRefinementResultReceiver = new RefinementResultReceiver(this, target, null);
397                fillIn.putExtra(Intent.EXTRA_RESULT_RECEIVER,
398                        mRefinementResultReceiver);
399                try {
400                    mRefinementIntentSender.sendIntent(this, 0, fillIn, null, null);
401                    return false;
402                } catch (SendIntentException e) {
403                    Log.e(TAG, "Refinement IntentSender failed to send", e);
404                }
405            }
406        }
407        updateChooserCounts(target, mContentType);
408        return super.onTargetSelected(target, alwaysCheck);
409    }
410
411    @Override
412    public void startSelected(int which, boolean always, boolean filtered) {
413        super.startSelected(which, always, filtered);
414
415        if (mChooserListAdapter != null) {
416            // Log the index of which type of target the user picked.
417            // Lower values mean the ranking was better.
418            int cat = 0;
419            int value = which;
420            switch (mChooserListAdapter.getPositionTargetType(which)) {
421                case ChooserListAdapter.TARGET_CALLER:
422                    cat = MetricsEvent.ACTION_ACTIVITY_CHOOSER_PICKED_APP_TARGET;
423                    break;
424                case ChooserListAdapter.TARGET_SERVICE:
425                    cat = MetricsEvent.ACTION_ACTIVITY_CHOOSER_PICKED_SERVICE_TARGET;
426                    value -= mChooserListAdapter.getCallerTargetCount();
427                    break;
428                case ChooserListAdapter.TARGET_STANDARD:
429                    cat = MetricsEvent.ACTION_ACTIVITY_CHOOSER_PICKED_STANDARD_TARGET;
430                    value -= mChooserListAdapter.getCallerTargetCount()
431                            + mChooserListAdapter.getServiceTargetCount();
432                    break;
433            }
434
435            if (cat != 0) {
436                MetricsLogger.action(this, cat, value);
437            }
438        }
439    }
440
441    void queryTargetServices(ChooserListAdapter adapter) {
442        final PackageManager pm = getPackageManager();
443        int targetsToQuery = 0;
444        for (int i = 0, N = adapter.getDisplayResolveInfoCount(); i < N; i++) {
445            final DisplayResolveInfo dri = adapter.getDisplayResolveInfo(i);
446            if (adapter.getScore(dri) == 0) {
447                // A score of 0 means the app hasn't been used in some time;
448                // don't query it as it's not likely to be relevant.
449                continue;
450            }
451            final ActivityInfo ai = dri.getResolveInfo().activityInfo;
452            final Bundle md = ai.metaData;
453            final String serviceName = md != null ? convertServiceName(ai.packageName,
454                    md.getString(ChooserTargetService.META_DATA_NAME)) : null;
455            if (serviceName != null) {
456                final ComponentName serviceComponent = new ComponentName(
457                        ai.packageName, serviceName);
458                final Intent serviceIntent = new Intent(ChooserTargetService.SERVICE_INTERFACE)
459                        .setComponent(serviceComponent);
460
461                if (DEBUG) {
462                    Log.d(TAG, "queryTargets found target with service " + serviceComponent);
463                }
464
465                try {
466                    final String perm = pm.getServiceInfo(serviceComponent, 0).permission;
467                    if (!ChooserTargetService.BIND_PERMISSION.equals(perm)) {
468                        Log.w(TAG, "ChooserTargetService " + serviceComponent + " does not require"
469                                + " permission " + ChooserTargetService.BIND_PERMISSION
470                                + " - this service will not be queried for ChooserTargets."
471                                + " add android:permission=\""
472                                + ChooserTargetService.BIND_PERMISSION + "\""
473                                + " to the <service> tag for " + serviceComponent
474                                + " in the manifest.");
475                        continue;
476                    }
477                } catch (NameNotFoundException e) {
478                    Log.e(TAG, "Could not look up service " + serviceComponent
479                            + "; component name not found");
480                    continue;
481                }
482
483                final ChooserTargetServiceConnection conn =
484                        new ChooserTargetServiceConnection(this, dri);
485
486                // Explicitly specify Process.myUserHandle instead of calling bindService
487                // to avoid the warning from calling from the system process without an explicit
488                // user handle
489                if (bindServiceAsUser(serviceIntent, conn, BIND_AUTO_CREATE | BIND_NOT_FOREGROUND,
490                        Process.myUserHandle())) {
491                    if (DEBUG) {
492                        Log.d(TAG, "Binding service connection for target " + dri
493                                + " intent " + serviceIntent);
494                    }
495                    mServiceConnections.add(conn);
496                    targetsToQuery++;
497                }
498            }
499            if (targetsToQuery >= QUERY_TARGET_SERVICE_LIMIT) {
500                if (DEBUG) Log.d(TAG, "queryTargets hit query target limit "
501                        + QUERY_TARGET_SERVICE_LIMIT);
502                break;
503            }
504        }
505
506        if (!mServiceConnections.isEmpty()) {
507            if (DEBUG) Log.d(TAG, "queryTargets setting watchdog timer for "
508                    + WATCHDOG_TIMEOUT_MILLIS + "ms");
509            mChooserHandler.sendEmptyMessageDelayed(CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT,
510                    WATCHDOG_TIMEOUT_MILLIS);
511        } else {
512            sendVoiceChoicesIfNeeded();
513        }
514    }
515
516    private String convertServiceName(String packageName, String serviceName) {
517        if (TextUtils.isEmpty(serviceName)) {
518            return null;
519        }
520
521        final String fullName;
522        if (serviceName.startsWith(".")) {
523            // Relative to the app package. Prepend the app package name.
524            fullName = packageName + serviceName;
525        } else if (serviceName.indexOf('.') >= 0) {
526            // Fully qualified package name.
527            fullName = serviceName;
528        } else {
529            fullName = null;
530        }
531        return fullName;
532    }
533
534    void unbindRemainingServices() {
535        if (DEBUG) {
536            Log.d(TAG, "unbindRemainingServices, " + mServiceConnections.size() + " left");
537        }
538        for (int i = 0, N = mServiceConnections.size(); i < N; i++) {
539            final ChooserTargetServiceConnection conn = mServiceConnections.get(i);
540            if (DEBUG) Log.d(TAG, "unbinding " + conn);
541            unbindService(conn);
542            conn.destroy();
543        }
544        mServiceConnections.clear();
545        mChooserHandler.removeMessages(CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT);
546    }
547
548    public void onSetupVoiceInteraction() {
549        // Do nothing. We'll send the voice stuff ourselves.
550    }
551
552    void updateChooserCounts(TargetInfo info, String annotation) {
553        if (info != null) {
554            UsageStatsManager usageStatsManager =
555                    (UsageStatsManager) getSystemService(Context.USAGE_STATS_SERVICE);
556            if (usageStatsManager == null) {
557                if (DEBUG) {
558                    Log.d(TAG, "Can not start UsageStatsManager");
559                }
560                return;
561            }
562            final ResolveInfo ri = info.getResolveInfo();
563            if (ri != null && ri.activityInfo != null) {
564                usageStatsManager.reportChooserSelection(ri.activityInfo.packageName, getUserId(),
565                        annotation, null, info.getResolvedIntent().getAction());
566                if (DEBUG) {
567                    Log.d(TAG, "ResolveInfo Package is" + ri.activityInfo.packageName);
568                }
569            } else if(DEBUG) {
570                Log.d(TAG, "Can not log Chooser Counts of null ResovleInfo");
571            }
572        }
573    }
574
575    void onRefinementResult(TargetInfo selectedTarget, Intent matchingIntent) {
576        if (mRefinementResultReceiver != null) {
577            mRefinementResultReceiver.destroy();
578            mRefinementResultReceiver = null;
579        }
580        if (selectedTarget == null) {
581            Log.e(TAG, "Refinement result intent did not match any known targets; canceling");
582        } else if (!checkTargetSourceIntent(selectedTarget, matchingIntent)) {
583            Log.e(TAG, "onRefinementResult: Selected target " + selectedTarget
584                    + " cannot match refined source intent " + matchingIntent);
585        } else {
586            TargetInfo clonedTarget = selectedTarget.cloneFilledIn(matchingIntent, 0);
587            if (super.onTargetSelected(clonedTarget, false)) {
588                updateChooserCounts(clonedTarget, mContentType);
589                finish();
590                return;
591            }
592        }
593        onRefinementCanceled();
594    }
595
596    void onRefinementCanceled() {
597        if (mRefinementResultReceiver != null) {
598            mRefinementResultReceiver.destroy();
599            mRefinementResultReceiver = null;
600        }
601        finish();
602    }
603
604    boolean checkTargetSourceIntent(TargetInfo target, Intent matchingIntent) {
605        final List<Intent> targetIntents = target.getAllSourceIntents();
606        for (int i = 0, N = targetIntents.size(); i < N; i++) {
607            final Intent targetIntent = targetIntents.get(i);
608            if (targetIntent.filterEquals(matchingIntent)) {
609                return true;
610            }
611        }
612        return false;
613    }
614
615    void filterServiceTargets(String packageName, List<ChooserTarget> targets) {
616        if (targets == null) {
617            return;
618        }
619
620        final PackageManager pm = getPackageManager();
621        for (int i = targets.size() - 1; i >= 0; i--) {
622            final ChooserTarget target = targets.get(i);
623            final ComponentName targetName = target.getComponentName();
624            if (packageName != null && packageName.equals(targetName.getPackageName())) {
625                // Anything from the original target's package is fine.
626                continue;
627            }
628
629            boolean remove;
630            try {
631                final ActivityInfo ai = pm.getActivityInfo(targetName, 0);
632                remove = !ai.exported || ai.permission != null;
633            } catch (NameNotFoundException e) {
634                Log.e(TAG, "Target " + target + " returned by " + packageName
635                        + " component not found");
636                remove = true;
637            }
638
639            if (remove) {
640                targets.remove(i);
641            }
642        }
643    }
644
645    @Override
646    public ResolveListAdapter createAdapter(Context context, List<Intent> payloadIntents,
647            Intent[] initialIntents, List<ResolveInfo> rList, int launchedFromUid,
648            boolean filterLastUsed) {
649        final ChooserListAdapter adapter = new ChooserListAdapter(context, payloadIntents,
650                initialIntents, rList, launchedFromUid, filterLastUsed);
651        if (DEBUG) Log.d(TAG, "Adapter created; querying services");
652        queryTargetServices(adapter);
653        return adapter;
654    }
655
656    final class ChooserTargetInfo implements TargetInfo {
657        private final DisplayResolveInfo mSourceInfo;
658        private final ResolveInfo mBackupResolveInfo;
659        private final ChooserTarget mChooserTarget;
660        private Drawable mBadgeIcon = null;
661        private CharSequence mBadgeContentDescription;
662        private Drawable mDisplayIcon;
663        private final Intent mFillInIntent;
664        private final int mFillInFlags;
665        private final float mModifiedScore;
666
667        public ChooserTargetInfo(DisplayResolveInfo sourceInfo, ChooserTarget chooserTarget,
668                float modifiedScore) {
669            mSourceInfo = sourceInfo;
670            mChooserTarget = chooserTarget;
671            mModifiedScore = modifiedScore;
672            if (sourceInfo != null) {
673                final ResolveInfo ri = sourceInfo.getResolveInfo();
674                if (ri != null) {
675                    final ActivityInfo ai = ri.activityInfo;
676                    if (ai != null && ai.applicationInfo != null) {
677                        final PackageManager pm = getPackageManager();
678                        mBadgeIcon = pm.getApplicationIcon(ai.applicationInfo);
679                        mBadgeContentDescription = pm.getApplicationLabel(ai.applicationInfo);
680                    }
681                }
682            }
683            final Icon icon = chooserTarget.getIcon();
684            // TODO do this in the background
685            mDisplayIcon = icon != null ? icon.loadDrawable(ChooserActivity.this) : null;
686
687            if (sourceInfo != null) {
688                mBackupResolveInfo = null;
689            } else {
690                mBackupResolveInfo = getPackageManager().resolveActivity(getResolvedIntent(), 0);
691            }
692
693            mFillInIntent = null;
694            mFillInFlags = 0;
695        }
696
697        private ChooserTargetInfo(ChooserTargetInfo other, Intent fillInIntent, int flags) {
698            mSourceInfo = other.mSourceInfo;
699            mBackupResolveInfo = other.mBackupResolveInfo;
700            mChooserTarget = other.mChooserTarget;
701            mBadgeIcon = other.mBadgeIcon;
702            mBadgeContentDescription = other.mBadgeContentDescription;
703            mDisplayIcon = other.mDisplayIcon;
704            mFillInIntent = fillInIntent;
705            mFillInFlags = flags;
706            mModifiedScore = other.mModifiedScore;
707        }
708
709        public float getModifiedScore() {
710            return mModifiedScore;
711        }
712
713        @Override
714        public Intent getResolvedIntent() {
715            if (mSourceInfo != null) {
716                return mSourceInfo.getResolvedIntent();
717            }
718
719            final Intent targetIntent = new Intent(getTargetIntent());
720            targetIntent.setComponent(mChooserTarget.getComponentName());
721            targetIntent.putExtras(mChooserTarget.getIntentExtras());
722            return targetIntent;
723        }
724
725        @Override
726        public ComponentName getResolvedComponentName() {
727            if (mSourceInfo != null) {
728                return mSourceInfo.getResolvedComponentName();
729            } else if (mBackupResolveInfo != null) {
730                return new ComponentName(mBackupResolveInfo.activityInfo.packageName,
731                        mBackupResolveInfo.activityInfo.name);
732            }
733            return null;
734        }
735
736        private Intent getBaseIntentToSend() {
737            Intent result = getResolvedIntent();
738            if (result == null) {
739                Log.e(TAG, "ChooserTargetInfo: no base intent available to send");
740            } else {
741                result = new Intent(result);
742                if (mFillInIntent != null) {
743                    result.fillIn(mFillInIntent, mFillInFlags);
744                }
745                result.fillIn(mReferrerFillInIntent, 0);
746            }
747            return result;
748        }
749
750        @Override
751        public boolean start(Activity activity, Bundle options) {
752            throw new RuntimeException("ChooserTargets should be started as caller.");
753        }
754
755        @Override
756        public boolean startAsCaller(Activity activity, Bundle options, int userId) {
757            final Intent intent = getBaseIntentToSend();
758            if (intent == null) {
759                return false;
760            }
761            intent.setComponent(mChooserTarget.getComponentName());
762            intent.putExtras(mChooserTarget.getIntentExtras());
763
764            // Important: we will ignore the target security checks in ActivityManager
765            // if and only if the ChooserTarget's target package is the same package
766            // where we got the ChooserTargetService that provided it. This lets a
767            // ChooserTargetService provide a non-exported or permission-guarded target
768            // to the chooser for the user to pick.
769            //
770            // If mSourceInfo is null, we got this ChooserTarget from the caller or elsewhere
771            // so we'll obey the caller's normal security checks.
772            final boolean ignoreTargetSecurity = mSourceInfo != null
773                    && mSourceInfo.getResolvedComponentName().getPackageName()
774                    .equals(mChooserTarget.getComponentName().getPackageName());
775            activity.startActivityAsCaller(intent, options, ignoreTargetSecurity, userId);
776            return true;
777        }
778
779        @Override
780        public boolean startAsUser(Activity activity, Bundle options, UserHandle user) {
781            throw new RuntimeException("ChooserTargets should be started as caller.");
782        }
783
784        @Override
785        public ResolveInfo getResolveInfo() {
786            return mSourceInfo != null ? mSourceInfo.getResolveInfo() : mBackupResolveInfo;
787        }
788
789        @Override
790        public CharSequence getDisplayLabel() {
791            return mChooserTarget.getTitle();
792        }
793
794        @Override
795        public CharSequence getExtendedInfo() {
796            // ChooserTargets have badge icons, so we won't show the extended info to disambiguate.
797            return null;
798        }
799
800        @Override
801        public Drawable getDisplayIcon() {
802            return mDisplayIcon;
803        }
804
805        @Override
806        public Drawable getBadgeIcon() {
807            return mBadgeIcon;
808        }
809
810        @Override
811        public CharSequence getBadgeContentDescription() {
812            return mBadgeContentDescription;
813        }
814
815        @Override
816        public TargetInfo cloneFilledIn(Intent fillInIntent, int flags) {
817            return new ChooserTargetInfo(this, fillInIntent, flags);
818        }
819
820        @Override
821        public List<Intent> getAllSourceIntents() {
822            final List<Intent> results = new ArrayList<>();
823            if (mSourceInfo != null) {
824                // We only queried the service for the first one in our sourceinfo.
825                results.add(mSourceInfo.getAllSourceIntents().get(0));
826            }
827            return results;
828        }
829
830        @Override
831        public boolean isPinned() {
832            return mSourceInfo != null ? mSourceInfo.isPinned() : false;
833        }
834    }
835
836    public class ChooserListAdapter extends ResolveListAdapter {
837        public static final int TARGET_BAD = -1;
838        public static final int TARGET_CALLER = 0;
839        public static final int TARGET_SERVICE = 1;
840        public static final int TARGET_STANDARD = 2;
841
842        private static final int MAX_SERVICE_TARGETS = 8;
843        private static final int MAX_TARGETS_PER_SERVICE = 4;
844
845        private final List<ChooserTargetInfo> mServiceTargets = new ArrayList<>();
846        private final List<TargetInfo> mCallerTargets = new ArrayList<>();
847        private boolean mShowServiceTargets;
848
849        private float mLateFee = 1.f;
850
851        private final BaseChooserTargetComparator mBaseTargetComparator
852                = new BaseChooserTargetComparator();
853
854        public ChooserListAdapter(Context context, List<Intent> payloadIntents,
855                Intent[] initialIntents, List<ResolveInfo> rList, int launchedFromUid,
856                boolean filterLastUsed) {
857            // Don't send the initial intents through the shared ResolverActivity path,
858            // we want to separate them into a different section.
859            super(context, payloadIntents, null, rList, launchedFromUid, filterLastUsed);
860
861            if (initialIntents != null) {
862                final PackageManager pm = getPackageManager();
863                for (int i = 0; i < initialIntents.length; i++) {
864                    final Intent ii = initialIntents[i];
865                    if (ii == null) {
866                        continue;
867                    }
868
869                    // We reimplement Intent#resolveActivityInfo here because if we have an
870                    // implicit intent, we want the ResolveInfo returned by PackageManager
871                    // instead of one we reconstruct ourselves. The ResolveInfo returned might
872                    // have extra metadata and resolvePackageName set and we want to respect that.
873                    ResolveInfo ri = null;
874                    ActivityInfo ai = null;
875                    final ComponentName cn = ii.getComponent();
876                    if (cn != null) {
877                        try {
878                            ai = pm.getActivityInfo(ii.getComponent(), 0);
879                            ri = new ResolveInfo();
880                            ri.activityInfo = ai;
881                        } catch (PackageManager.NameNotFoundException ignored) {
882                            // ai will == null below
883                        }
884                    }
885                    if (ai == null) {
886                        ri = pm.resolveActivity(ii, PackageManager.MATCH_DEFAULT_ONLY);
887                        ai = ri != null ? ri.activityInfo : null;
888                    }
889                    if (ai == null) {
890                        Log.w(TAG, "No activity found for " + ii);
891                        continue;
892                    }
893                    UserManager userManager =
894                            (UserManager) getSystemService(Context.USER_SERVICE);
895                    if (ii instanceof LabeledIntent) {
896                        LabeledIntent li = (LabeledIntent)ii;
897                        ri.resolvePackageName = li.getSourcePackage();
898                        ri.labelRes = li.getLabelResource();
899                        ri.nonLocalizedLabel = li.getNonLocalizedLabel();
900                        ri.icon = li.getIconResource();
901                        ri.iconResourceId = ri.icon;
902                    }
903                    if (userManager.isManagedProfile()) {
904                        ri.noResourceId = true;
905                        ri.icon = 0;
906                    }
907                    mCallerTargets.add(new DisplayResolveInfo(ii, ri,
908                            ri.loadLabel(pm), null, ii));
909                }
910            }
911        }
912
913        @Override
914        public boolean showsExtendedInfo(TargetInfo info) {
915            // We have badges so we don't need this text shown.
916            return false;
917        }
918
919        @Override
920        public boolean isComponentPinned(ComponentName name) {
921            return mPinnedSharedPrefs.getBoolean(name.flattenToString(), false);
922        }
923
924        @Override
925        public float getScore(DisplayResolveInfo target) {
926            if (target == null) {
927                return CALLER_TARGET_SCORE_BOOST;
928            }
929            float score = super.getScore(target);
930            if (target.isPinned()) {
931                score += PINNED_TARGET_SCORE_BOOST;
932            }
933            return score;
934        }
935
936        @Override
937        public View onCreateView(ViewGroup parent) {
938            return mInflater.inflate(
939                    com.android.internal.R.layout.resolve_grid_item, parent, false);
940        }
941
942        @Override
943        public void onListRebuilt() {
944            if (mServiceTargets != null) {
945                pruneServiceTargets();
946            }
947        }
948
949        @Override
950        public boolean shouldGetResolvedFilter() {
951            return true;
952        }
953
954        @Override
955        public int getCount() {
956            return super.getCount() + getServiceTargetCount() + getCallerTargetCount();
957        }
958
959        @Override
960        public int getUnfilteredCount() {
961            return super.getUnfilteredCount() + getServiceTargetCount() + getCallerTargetCount();
962        }
963
964        public int getCallerTargetCount() {
965            return mCallerTargets.size();
966        }
967
968        public int getServiceTargetCount() {
969            if (!mShowServiceTargets) {
970                return 0;
971            }
972            return Math.min(mServiceTargets.size(), MAX_SERVICE_TARGETS);
973        }
974
975        public int getStandardTargetCount() {
976            return super.getCount();
977        }
978
979        public int getPositionTargetType(int position) {
980            int offset = 0;
981
982            final int callerTargetCount = getCallerTargetCount();
983            if (position < callerTargetCount) {
984                return TARGET_CALLER;
985            }
986            offset += callerTargetCount;
987
988            final int serviceTargetCount = getServiceTargetCount();
989            if (position - offset < serviceTargetCount) {
990                return TARGET_SERVICE;
991            }
992            offset += serviceTargetCount;
993
994            final int standardTargetCount = super.getCount();
995            if (position - offset < standardTargetCount) {
996                return TARGET_STANDARD;
997            }
998
999            return TARGET_BAD;
1000        }
1001
1002        @Override
1003        public TargetInfo getItem(int position) {
1004            return targetInfoForPosition(position, true);
1005        }
1006
1007        @Override
1008        public TargetInfo targetInfoForPosition(int position, boolean filtered) {
1009            int offset = 0;
1010
1011            final int callerTargetCount = getCallerTargetCount();
1012            if (position < callerTargetCount) {
1013                return mCallerTargets.get(position);
1014            }
1015            offset += callerTargetCount;
1016
1017            final int serviceTargetCount = getServiceTargetCount();
1018            if (position - offset < serviceTargetCount) {
1019                return mServiceTargets.get(position - offset);
1020            }
1021            offset += serviceTargetCount;
1022
1023            return filtered ? super.getItem(position - offset)
1024                    : getDisplayInfoAt(position - offset);
1025        }
1026
1027        public void addServiceResults(DisplayResolveInfo origTarget, List<ChooserTarget> targets) {
1028            if (DEBUG) Log.d(TAG, "addServiceResults " + origTarget + ", " + targets.size()
1029                    + " targets");
1030            final float parentScore = getScore(origTarget);
1031            Collections.sort(targets, mBaseTargetComparator);
1032            float lastScore = 0;
1033            for (int i = 0, N = Math.min(targets.size(), MAX_TARGETS_PER_SERVICE); i < N; i++) {
1034                final ChooserTarget target = targets.get(i);
1035                float targetScore = target.getScore();
1036                targetScore *= parentScore;
1037                targetScore *= mLateFee;
1038                if (i > 0 && targetScore >= lastScore) {
1039                    // Apply a decay so that the top app can't crowd out everything else.
1040                    // This incents ChooserTargetServices to define what's truly better.
1041                    targetScore = lastScore * 0.95f;
1042                }
1043                insertServiceTarget(new ChooserTargetInfo(origTarget, target, targetScore));
1044
1045                if (DEBUG) {
1046                    Log.d(TAG, " => " + target.toString() + " score=" + targetScore
1047                            + " base=" + target.getScore()
1048                            + " lastScore=" + lastScore
1049                            + " parentScore=" + parentScore
1050                            + " lateFee=" + mLateFee);
1051                }
1052
1053                lastScore = targetScore;
1054            }
1055
1056            mLateFee *= 0.95f;
1057
1058            notifyDataSetChanged();
1059        }
1060
1061        /**
1062         * Set to true to reveal all service targets at once.
1063         */
1064        public void setShowServiceTargets(boolean show) {
1065            mShowServiceTargets = show;
1066            notifyDataSetChanged();
1067        }
1068
1069        private void insertServiceTarget(ChooserTargetInfo chooserTargetInfo) {
1070            final float newScore = chooserTargetInfo.getModifiedScore();
1071            for (int i = 0, N = mServiceTargets.size(); i < N; i++) {
1072                final ChooserTargetInfo serviceTarget = mServiceTargets.get(i);
1073                if (newScore > serviceTarget.getModifiedScore()) {
1074                    mServiceTargets.add(i, chooserTargetInfo);
1075                    return;
1076                }
1077            }
1078            mServiceTargets.add(chooserTargetInfo);
1079        }
1080
1081        private void pruneServiceTargets() {
1082            if (DEBUG) Log.d(TAG, "pruneServiceTargets");
1083            for (int i = mServiceTargets.size() - 1; i >= 0; i--) {
1084                final ChooserTargetInfo cti = mServiceTargets.get(i);
1085                if (!hasResolvedTarget(cti.getResolveInfo())) {
1086                    if (DEBUG) Log.d(TAG, " => " + i + " " + cti);
1087                    mServiceTargets.remove(i);
1088                }
1089            }
1090        }
1091    }
1092
1093    static class BaseChooserTargetComparator implements Comparator<ChooserTarget> {
1094        @Override
1095        public int compare(ChooserTarget lhs, ChooserTarget rhs) {
1096            // Descending order
1097            return (int) Math.signum(rhs.getScore() - lhs.getScore());
1098        }
1099    }
1100
1101    static class RowScale {
1102        private static final int DURATION = 400;
1103
1104        float mScale;
1105        ChooserRowAdapter mAdapter;
1106        private final ObjectAnimator mAnimator;
1107
1108        public static final FloatProperty<RowScale> PROPERTY =
1109                new FloatProperty<RowScale>("scale") {
1110            @Override
1111            public void setValue(RowScale object, float value) {
1112                object.mScale = value;
1113                object.mAdapter.notifyDataSetChanged();
1114            }
1115
1116            @Override
1117            public Float get(RowScale object) {
1118                return object.mScale;
1119            }
1120        };
1121
1122        public RowScale(@NonNull ChooserRowAdapter adapter, float from, float to) {
1123            mAdapter = adapter;
1124            mScale = from;
1125            if (from == to) {
1126                mAnimator = null;
1127                return;
1128            }
1129
1130            mAnimator = ObjectAnimator.ofFloat(this, PROPERTY, from, to).setDuration(DURATION);
1131        }
1132
1133        public RowScale setInterpolator(Interpolator interpolator) {
1134            if (mAnimator != null) {
1135                mAnimator.setInterpolator(interpolator);
1136            }
1137            return this;
1138        }
1139
1140        public float get() {
1141            return mScale;
1142        }
1143
1144        public void startAnimation() {
1145            if (mAnimator != null) {
1146                mAnimator.start();
1147            }
1148        }
1149
1150        public void cancelAnimation() {
1151            if (mAnimator != null) {
1152                mAnimator.cancel();
1153            }
1154        }
1155    }
1156
1157    class ChooserRowAdapter extends BaseAdapter {
1158        private ChooserListAdapter mChooserListAdapter;
1159        private final LayoutInflater mLayoutInflater;
1160        private final int mColumnCount = 4;
1161        private RowScale[] mServiceTargetScale;
1162        private final Interpolator mInterpolator;
1163
1164        public ChooserRowAdapter(ChooserListAdapter wrappedAdapter) {
1165            mChooserListAdapter = wrappedAdapter;
1166            mLayoutInflater = LayoutInflater.from(ChooserActivity.this);
1167
1168            mInterpolator = AnimationUtils.loadInterpolator(ChooserActivity.this,
1169                    android.R.interpolator.decelerate_quint);
1170
1171            wrappedAdapter.registerDataSetObserver(new DataSetObserver() {
1172                @Override
1173                public void onChanged() {
1174                    super.onChanged();
1175                    final int rcount = getServiceTargetRowCount();
1176                    if (mServiceTargetScale == null
1177                            || mServiceTargetScale.length != rcount) {
1178                        RowScale[] old = mServiceTargetScale;
1179                        int oldRCount = old != null ? old.length : 0;
1180                        mServiceTargetScale = new RowScale[rcount];
1181                        if (old != null && rcount > 0) {
1182                            System.arraycopy(old, 0, mServiceTargetScale, 0,
1183                                    Math.min(old.length, rcount));
1184                        }
1185
1186                        for (int i = rcount; i < oldRCount; i++) {
1187                            old[i].cancelAnimation();
1188                        }
1189
1190                        for (int i = oldRCount; i < rcount; i++) {
1191                            final RowScale rs = new RowScale(ChooserRowAdapter.this, 0.f, 1.f)
1192                                    .setInterpolator(mInterpolator);
1193                            mServiceTargetScale[i] = rs;
1194                        }
1195
1196                        // Start the animations in a separate loop.
1197                        // The process of starting animations will result in
1198                        // binding views to set up initial values, and we must
1199                        // have ALL of the new RowScale objects created above before
1200                        // we get started.
1201                        for (int i = oldRCount; i < rcount; i++) {
1202                            mServiceTargetScale[i].startAnimation();
1203                        }
1204                    }
1205
1206                    notifyDataSetChanged();
1207                }
1208
1209                @Override
1210                public void onInvalidated() {
1211                    super.onInvalidated();
1212                    notifyDataSetInvalidated();
1213                    if (mServiceTargetScale != null) {
1214                        for (RowScale rs : mServiceTargetScale) {
1215                            rs.cancelAnimation();
1216                        }
1217                    }
1218                }
1219            });
1220        }
1221
1222        private float getRowScale(int rowPosition) {
1223            final int start = getCallerTargetRowCount();
1224            final int end = start + getServiceTargetRowCount();
1225            if (rowPosition >= start && rowPosition < end) {
1226                return mServiceTargetScale[rowPosition - start].get();
1227            }
1228            return 1.f;
1229        }
1230
1231        @Override
1232        public int getCount() {
1233            return (int) (
1234                    getCallerTargetRowCount()
1235                    + getServiceTargetRowCount()
1236                    + Math.ceil((float) mChooserListAdapter.getStandardTargetCount() / mColumnCount)
1237            );
1238        }
1239
1240        public int getCallerTargetRowCount() {
1241            return (int) Math.ceil(
1242                    (float) mChooserListAdapter.getCallerTargetCount() / mColumnCount);
1243        }
1244
1245        public int getServiceTargetRowCount() {
1246            return (int) Math.ceil(
1247                    (float) mChooserListAdapter.getServiceTargetCount() / mColumnCount);
1248        }
1249
1250        @Override
1251        public Object getItem(int position) {
1252            // We have nothing useful to return here.
1253            return position;
1254        }
1255
1256        @Override
1257        public long getItemId(int position) {
1258            return position;
1259        }
1260
1261        @Override
1262        public View getView(int position, View convertView, ViewGroup parent) {
1263            final RowViewHolder holder;
1264            if (convertView == null) {
1265                holder = createViewHolder(parent);
1266            } else {
1267                holder = (RowViewHolder) convertView.getTag();
1268            }
1269            bindViewHolder(position, holder);
1270
1271            return holder.row;
1272        }
1273
1274        RowViewHolder createViewHolder(ViewGroup parent) {
1275            final ViewGroup row = (ViewGroup) mLayoutInflater.inflate(R.layout.chooser_row,
1276                    parent, false);
1277            final RowViewHolder holder = new RowViewHolder(row, mColumnCount);
1278            final int spec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
1279
1280            for (int i = 0; i < mColumnCount; i++) {
1281                final View v = mChooserListAdapter.createView(row);
1282                final int column = i;
1283                v.setOnClickListener(new OnClickListener() {
1284                    @Override
1285                    public void onClick(View v) {
1286                        startSelected(holder.itemIndices[column], false, true);
1287                    }
1288                });
1289                v.setOnLongClickListener(new OnLongClickListener() {
1290                    @Override
1291                    public boolean onLongClick(View v) {
1292                        showTargetDetails(
1293                                mChooserListAdapter.resolveInfoForPosition(
1294                                        holder.itemIndices[column], true));
1295                        return true;
1296                    }
1297                });
1298                row.addView(v);
1299                holder.cells[i] = v;
1300
1301                // Force height to be a given so we don't have visual disruption during scaling.
1302                LayoutParams lp = v.getLayoutParams();
1303                v.measure(spec, spec);
1304                if (lp == null) {
1305                    lp = new LayoutParams(LayoutParams.MATCH_PARENT, v.getMeasuredHeight());
1306                    row.setLayoutParams(lp);
1307                } else {
1308                    lp.height = v.getMeasuredHeight();
1309                }
1310            }
1311
1312            // Pre-measure so we can scale later.
1313            holder.measure();
1314            LayoutParams lp = row.getLayoutParams();
1315            if (lp == null) {
1316                lp = new LayoutParams(LayoutParams.MATCH_PARENT, holder.measuredRowHeight);
1317                row.setLayoutParams(lp);
1318            } else {
1319                lp.height = holder.measuredRowHeight;
1320            }
1321            row.setTag(holder);
1322            return holder;
1323        }
1324
1325        void bindViewHolder(int rowPosition, RowViewHolder holder) {
1326            final int start = getFirstRowPosition(rowPosition);
1327            final int startType = mChooserListAdapter.getPositionTargetType(start);
1328
1329            int end = start + mColumnCount - 1;
1330            while (mChooserListAdapter.getPositionTargetType(end) != startType && end >= start) {
1331                end--;
1332            }
1333
1334            if (startType == ChooserListAdapter.TARGET_SERVICE) {
1335                holder.row.setBackgroundColor(
1336                        getColor(R.color.chooser_service_row_background_color));
1337            } else {
1338                holder.row.setBackgroundColor(Color.TRANSPARENT);
1339            }
1340
1341            final int oldHeight = holder.row.getLayoutParams().height;
1342            holder.row.getLayoutParams().height = Math.max(1,
1343                    (int) (holder.measuredRowHeight * getRowScale(rowPosition)));
1344            if (holder.row.getLayoutParams().height != oldHeight) {
1345                holder.row.requestLayout();
1346            }
1347
1348            for (int i = 0; i < mColumnCount; i++) {
1349                final View v = holder.cells[i];
1350                if (start + i <= end) {
1351                    v.setVisibility(View.VISIBLE);
1352                    holder.itemIndices[i] = start + i;
1353                    mChooserListAdapter.bindView(holder.itemIndices[i], v);
1354                } else {
1355                    v.setVisibility(View.GONE);
1356                }
1357            }
1358        }
1359
1360        int getFirstRowPosition(int row) {
1361            final int callerCount = mChooserListAdapter.getCallerTargetCount();
1362            final int callerRows = (int) Math.ceil((float) callerCount / mColumnCount);
1363
1364            if (row < callerRows) {
1365                return row * mColumnCount;
1366            }
1367
1368            final int serviceCount = mChooserListAdapter.getServiceTargetCount();
1369            final int serviceRows = (int) Math.ceil((float) serviceCount / mColumnCount);
1370
1371            if (row < callerRows + serviceRows) {
1372                return callerCount + (row - callerRows) * mColumnCount;
1373            }
1374
1375            return callerCount + serviceCount
1376                    + (row - callerRows - serviceRows) * mColumnCount;
1377        }
1378    }
1379
1380    static class RowViewHolder {
1381        final View[] cells;
1382        final ViewGroup row;
1383        int measuredRowHeight;
1384        int[] itemIndices;
1385
1386        public RowViewHolder(ViewGroup row, int cellCount) {
1387            this.row = row;
1388            this.cells = new View[cellCount];
1389            this.itemIndices = new int[cellCount];
1390        }
1391
1392        public void measure() {
1393            final int spec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
1394            row.measure(spec, spec);
1395            measuredRowHeight = row.getMeasuredHeight();
1396        }
1397    }
1398
1399    static class ChooserTargetServiceConnection implements ServiceConnection {
1400        private DisplayResolveInfo mOriginalTarget;
1401        private ComponentName mConnectedComponent;
1402        private ChooserActivity mChooserActivity;
1403        private final Object mLock = new Object();
1404
1405        private final IChooserTargetResult mChooserTargetResult = new IChooserTargetResult.Stub() {
1406            @Override
1407            public void sendResult(List<ChooserTarget> targets) throws RemoteException {
1408                synchronized (mLock) {
1409                    if (mChooserActivity == null) {
1410                        Log.e(TAG, "destroyed ChooserTargetServiceConnection received result from "
1411                                + mConnectedComponent + "; ignoring...");
1412                        return;
1413                    }
1414                    mChooserActivity.filterServiceTargets(
1415                            mOriginalTarget.getResolveInfo().activityInfo.packageName, targets);
1416                    final Message msg = Message.obtain();
1417                    msg.what = CHOOSER_TARGET_SERVICE_RESULT;
1418                    msg.obj = new ServiceResultInfo(mOriginalTarget, targets,
1419                            ChooserTargetServiceConnection.this);
1420                    mChooserActivity.mChooserHandler.sendMessage(msg);
1421                }
1422            }
1423        };
1424
1425        public ChooserTargetServiceConnection(ChooserActivity chooserActivity,
1426                DisplayResolveInfo dri) {
1427            mChooserActivity = chooserActivity;
1428            mOriginalTarget = dri;
1429        }
1430
1431        @Override
1432        public void onServiceConnected(ComponentName name, IBinder service) {
1433            if (DEBUG) Log.d(TAG, "onServiceConnected: " + name);
1434            synchronized (mLock) {
1435                if (mChooserActivity == null) {
1436                    Log.e(TAG, "destroyed ChooserTargetServiceConnection got onServiceConnected");
1437                    return;
1438                }
1439
1440                final IChooserTargetService icts = IChooserTargetService.Stub.asInterface(service);
1441                try {
1442                    icts.getChooserTargets(mOriginalTarget.getResolvedComponentName(),
1443                            mOriginalTarget.getResolveInfo().filter, mChooserTargetResult);
1444                } catch (RemoteException e) {
1445                    Log.e(TAG, "Querying ChooserTargetService " + name + " failed.", e);
1446                    mChooserActivity.unbindService(this);
1447                    destroy();
1448                    mChooserActivity.mServiceConnections.remove(this);
1449                }
1450            }
1451        }
1452
1453        @Override
1454        public void onServiceDisconnected(ComponentName name) {
1455            if (DEBUG) Log.d(TAG, "onServiceDisconnected: " + name);
1456            synchronized (mLock) {
1457                if (mChooserActivity == null) {
1458                    Log.e(TAG,
1459                            "destroyed ChooserTargetServiceConnection got onServiceDisconnected");
1460                    return;
1461                }
1462
1463                mChooserActivity.unbindService(this);
1464                destroy();
1465                mChooserActivity.mServiceConnections.remove(this);
1466                if (mChooserActivity.mServiceConnections.isEmpty()) {
1467                    mChooserActivity.mChooserHandler.removeMessages(
1468                            CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT);
1469                    mChooserActivity.sendVoiceChoicesIfNeeded();
1470                }
1471                mConnectedComponent = null;
1472            }
1473        }
1474
1475        public void destroy() {
1476            synchronized (mLock) {
1477                mChooserActivity = null;
1478                mOriginalTarget = null;
1479            }
1480        }
1481
1482        @Override
1483        public String toString() {
1484            return "ChooserTargetServiceConnection{service="
1485                    + mConnectedComponent + ", activity="
1486                    + (mOriginalTarget != null
1487                    ? mOriginalTarget.getResolveInfo().activityInfo.toString()
1488                    : "<connection destroyed>") + "}";
1489        }
1490    }
1491
1492    static class ServiceResultInfo {
1493        public final DisplayResolveInfo originalTarget;
1494        public final List<ChooserTarget> resultTargets;
1495        public final ChooserTargetServiceConnection connection;
1496
1497        public ServiceResultInfo(DisplayResolveInfo ot, List<ChooserTarget> rt,
1498                ChooserTargetServiceConnection c) {
1499            originalTarget = ot;
1500            resultTargets = rt;
1501            connection = c;
1502        }
1503    }
1504
1505    static class RefinementResultReceiver extends ResultReceiver {
1506        private ChooserActivity mChooserActivity;
1507        private TargetInfo mSelectedTarget;
1508
1509        public RefinementResultReceiver(ChooserActivity host, TargetInfo target,
1510                Handler handler) {
1511            super(handler);
1512            mChooserActivity = host;
1513            mSelectedTarget = target;
1514        }
1515
1516        @Override
1517        protected void onReceiveResult(int resultCode, Bundle resultData) {
1518            if (mChooserActivity == null) {
1519                Log.e(TAG, "Destroyed RefinementResultReceiver received a result");
1520                return;
1521            }
1522            if (resultData == null) {
1523                Log.e(TAG, "RefinementResultReceiver received null resultData");
1524                return;
1525            }
1526
1527            switch (resultCode) {
1528                case RESULT_CANCELED:
1529                    mChooserActivity.onRefinementCanceled();
1530                    break;
1531                case RESULT_OK:
1532                    Parcelable intentParcelable = resultData.getParcelable(Intent.EXTRA_INTENT);
1533                    if (intentParcelable instanceof Intent) {
1534                        mChooserActivity.onRefinementResult(mSelectedTarget,
1535                                (Intent) intentParcelable);
1536                    } else {
1537                        Log.e(TAG, "RefinementResultReceiver received RESULT_OK but no Intent"
1538                                + " in resultData with key Intent.EXTRA_INTENT");
1539                    }
1540                    break;
1541                default:
1542                    Log.w(TAG, "Unknown result code " + resultCode
1543                            + " sent to RefinementResultReceiver");
1544                    break;
1545            }
1546        }
1547
1548        public void destroy() {
1549            mChooserActivity = null;
1550            mSelectedTarget = null;
1551        }
1552    }
1553
1554    class OffsetDataSetObserver extends DataSetObserver {
1555        private final AbsListView mListView;
1556        private int mCachedViewType = -1;
1557        private View mCachedView;
1558
1559        public OffsetDataSetObserver(AbsListView listView) {
1560            mListView = listView;
1561        }
1562
1563        @Override
1564        public void onChanged() {
1565            if (mResolverDrawerLayout == null) {
1566                return;
1567            }
1568
1569            final int chooserTargetRows = mChooserRowAdapter.getServiceTargetRowCount();
1570            int offset = 0;
1571            for (int i = 0; i < chooserTargetRows; i++)  {
1572                final int pos = mChooserRowAdapter.getCallerTargetRowCount() + i;
1573                final int vt = mChooserRowAdapter.getItemViewType(pos);
1574                if (vt != mCachedViewType) {
1575                    mCachedView = null;
1576                }
1577                final View v = mChooserRowAdapter.getView(pos, mCachedView, mListView);
1578                int height = ((RowViewHolder) (v.getTag())).measuredRowHeight;
1579
1580                offset += (int) (height * mChooserRowAdapter.getRowScale(pos));
1581
1582                if (vt >= 0) {
1583                    mCachedViewType = vt;
1584                    mCachedView = v;
1585                } else {
1586                    mCachedViewType = -1;
1587                }
1588            }
1589
1590            mResolverDrawerLayout.setCollapsibleHeightReserved(offset);
1591        }
1592    }
1593}
1594