ChooserActivity.java revision 9fa2a2cd46e11be0ea50ad7be0d3dd2c9273f55a 
1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.internal.app;
18
19import android.animation.ObjectAnimator;
20import android.annotation.NonNull;
21import android.app.Activity;
22import android.app.usage.UsageStatsManager;
23import android.content.ComponentName;
24import android.content.Context;
25import android.content.Intent;
26import android.content.IntentSender;
27import android.content.IntentSender.SendIntentException;
28import android.content.ServiceConnection;
29import android.content.SharedPreferences;
30import android.content.pm.ActivityInfo;
31import android.content.pm.LabeledIntent;
32import android.content.pm.PackageManager;
33import android.content.pm.PackageManager.NameNotFoundException;
34import android.content.pm.ResolveInfo;
35import android.database.DataSetObserver;
36import android.graphics.Color;
37import android.graphics.drawable.Drawable;
38import android.graphics.drawable.Icon;
39import android.os.Bundle;
40import android.os.Environment;
41import android.os.Handler;
42import android.os.IBinder;
43import android.os.Message;
44import android.os.Parcelable;
45import android.os.Process;
46import android.os.RemoteException;
47import android.os.ResultReceiver;
48import android.os.UserHandle;
49import android.os.UserManager;
50import android.os.storage.StorageManager;
51import android.service.chooser.ChooserTarget;
52import android.service.chooser.ChooserTargetService;
53import android.service.chooser.IChooserTargetResult;
54import android.service.chooser.IChooserTargetService;
55import android.text.TextUtils;
56import android.util.FloatProperty;
57import android.util.Log;
58import android.util.Slog;
59import android.view.LayoutInflater;
60import android.view.View;
61import android.view.View.MeasureSpec;
62import android.view.View.OnClickListener;
63import android.view.View.OnLongClickListener;
64import android.view.ViewGroup;
65import android.view.ViewGroup.LayoutParams;
66import android.view.animation.AnimationUtils;
67import android.view.animation.Interpolator;
68import android.widget.AbsListView;
69import android.widget.BaseAdapter;
70import android.widget.ListView;
71import com.android.internal.R;
72import com.android.internal.annotations.VisibleForTesting;
73import com.android.internal.app.ResolverActivity.TargetInfo;
74import com.android.internal.logging.MetricsLogger;
75import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
76import com.google.android.collect.Lists;
77
78import java.io.File;
79import java.util.ArrayList;
80import java.util.Collections;
81import java.util.Comparator;
82import java.util.List;
83
84public class ChooserActivity extends ResolverActivity {
85    private static final String TAG = "ChooserActivity";
86
87    private static final boolean DEBUG = false;
88
89    private static final int QUERY_TARGET_SERVICE_LIMIT = 5;
90    private static final int WATCHDOG_TIMEOUT_MILLIS = 5000;
91
92    private Bundle mReplacementExtras;
93    private IntentSender mChosenComponentSender;
94    private IntentSender mRefinementIntentSender;
95    private RefinementResultReceiver mRefinementResultReceiver;
96    private ChooserTarget[] mCallerChooserTargets;
97    private ComponentName[] mFilteredComponentNames;
98
99    private Intent mReferrerFillInIntent;
100
101    private long mChooserShownTime;
102    protected boolean mIsSuccessfullySelected;
103
104    private ChooserListAdapter mChooserListAdapter;
105    private ChooserRowAdapter mChooserRowAdapter;
106
107    private SharedPreferences mPinnedSharedPrefs;
108    private static final float PINNED_TARGET_SCORE_BOOST = 1000.f;
109    private static final float CALLER_TARGET_SCORE_BOOST = 900.f;
110    private static final String PINNED_SHARED_PREFS_NAME = "chooser_pin_settings";
111    private static final String TARGET_DETAILS_FRAGMENT_TAG = "targetDetailsFragment";
112
113    private final List<ChooserTargetServiceConnection> mServiceConnections = new ArrayList<>();
114
115    private static final int CHOOSER_TARGET_SERVICE_RESULT = 1;
116    private static final int CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT = 2;
117
118    private final Handler mChooserHandler = new Handler() {
119        @Override
120        public void handleMessage(Message msg) {
121            switch (msg.what) {
122                case CHOOSER_TARGET_SERVICE_RESULT:
123                    if (DEBUG) Log.d(TAG, "CHOOSER_TARGET_SERVICE_RESULT");
124                    if (isDestroyed()) break;
125                    final ServiceResultInfo sri = (ServiceResultInfo) msg.obj;
126                    if (!mServiceConnections.contains(sri.connection)) {
127                        Log.w(TAG, "ChooserTargetServiceConnection " + sri.connection
128                                + " returned after being removed from active connections."
129                                + " Have you considered returning results faster?");
130                        break;
131                    }
132                    if (sri.resultTargets != null) {
133                        mChooserListAdapter.addServiceResults(sri.originalTarget,
134                                sri.resultTargets);
135                    }
136                    unbindService(sri.connection);
137                    sri.connection.destroy();
138                    mServiceConnections.remove(sri.connection);
139                    if (mServiceConnections.isEmpty()) {
140                        mChooserHandler.removeMessages(CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT);
141                        sendVoiceChoicesIfNeeded();
142                        mChooserListAdapter.setShowServiceTargets(true);
143                    }
144                    break;
145
146                case CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT:
147                    if (DEBUG) {
148                        Log.d(TAG, "CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT; unbinding services");
149                    }
150                    unbindRemainingServices();
151                    sendVoiceChoicesIfNeeded();
152                    mChooserListAdapter.setShowServiceTargets(true);
153                    break;
154
155                default:
156                    super.handleMessage(msg);
157            }
158        }
159    };
160
161    @Override
162    protected void onCreate(Bundle savedInstanceState) {
163        final long intentReceivedTime = System.currentTimeMillis();
164        mIsSuccessfullySelected = false;
165        Intent intent = getIntent();
166        Parcelable targetParcelable = intent.getParcelableExtra(Intent.EXTRA_INTENT);
167        if (!(targetParcelable instanceof Intent)) {
168            Log.w("ChooserActivity", "Target is not an intent: " + targetParcelable);
169            finish();
170            super.onCreate(null);
171            return;
172        }
173        Intent target = (Intent) targetParcelable;
174        if (target != null) {
175            modifyTargetIntent(target);
176        }
177        Parcelable[] targetsParcelable
178                = intent.getParcelableArrayExtra(Intent.EXTRA_ALTERNATE_INTENTS);
179        if (targetsParcelable != null) {
180            final boolean offset = target == null;
181            Intent[] additionalTargets =
182                    new Intent[offset ? targetsParcelable.length - 1 : targetsParcelable.length];
183            for (int i = 0; i < targetsParcelable.length; i++) {
184                if (!(targetsParcelable[i] instanceof Intent)) {
185                    Log.w(TAG, "EXTRA_ALTERNATE_INTENTS array entry #" + i + " is not an Intent: "
186                            + targetsParcelable[i]);
187                    finish();
188                    super.onCreate(null);
189                    return;
190                }
191                final Intent additionalTarget = (Intent) targetsParcelable[i];
192                if (i == 0 && target == null) {
193                    target = additionalTarget;
194                    modifyTargetIntent(target);
195                } else {
196                    additionalTargets[offset ? i - 1 : i] = additionalTarget;
197                    modifyTargetIntent(additionalTarget);
198                }
199            }
200            setAdditionalTargets(additionalTargets);
201        }
202
203        mReplacementExtras = intent.getBundleExtra(Intent.EXTRA_REPLACEMENT_EXTRAS);
204        CharSequence title = intent.getCharSequenceExtra(Intent.EXTRA_TITLE);
205        int defaultTitleRes = 0;
206        if (title == null) {
207            defaultTitleRes = com.android.internal.R.string.chooseActivity;
208        }
209        Parcelable[] pa = intent.getParcelableArrayExtra(Intent.EXTRA_INITIAL_INTENTS);
210        Intent[] initialIntents = null;
211        if (pa != null) {
212            initialIntents = new Intent[pa.length];
213            for (int i=0; i<pa.length; i++) {
214                if (!(pa[i] instanceof Intent)) {
215                    Log.w(TAG, "Initial intent #" + i + " not an Intent: " + pa[i]);
216                    finish();
217                    super.onCreate(null);
218                    return;
219                }
220                final Intent in = (Intent) pa[i];
221                modifyTargetIntent(in);
222                initialIntents[i] = in;
223            }
224        }
225
226        mReferrerFillInIntent = new Intent().putExtra(Intent.EXTRA_REFERRER, getReferrer());
227
228        mChosenComponentSender = intent.getParcelableExtra(
229                Intent.EXTRA_CHOSEN_COMPONENT_INTENT_SENDER);
230        mRefinementIntentSender = intent.getParcelableExtra(
231                Intent.EXTRA_CHOOSER_REFINEMENT_INTENT_SENDER);
232        setSafeForwardingMode(true);
233
234        pa = intent.getParcelableArrayExtra(Intent.EXTRA_EXCLUDE_COMPONENTS);
235        if (pa != null) {
236            ComponentName[] names = new ComponentName[pa.length];
237            for (int i = 0; i < pa.length; i++) {
238                if (!(pa[i] instanceof ComponentName)) {
239                    Log.w(TAG, "Filtered component #" + i + " not a ComponentName: " + pa[i]);
240                    names = null;
241                    break;
242                }
243                names[i] = (ComponentName) pa[i];
244            }
245            mFilteredComponentNames = names;
246        }
247
248        pa = intent.getParcelableArrayExtra(Intent.EXTRA_CHOOSER_TARGETS);
249        if (pa != null) {
250            ChooserTarget[] targets = new ChooserTarget[pa.length];
251            for (int i = 0; i < pa.length; i++) {
252                if (!(pa[i] instanceof ChooserTarget)) {
253                    Log.w(TAG, "Chooser target #" + i + " not a ChooserTarget: " + pa[i]);
254                    targets = null;
255                    break;
256                }
257                targets[i] = (ChooserTarget) pa[i];
258            }
259            mCallerChooserTargets = targets;
260        }
261
262        mPinnedSharedPrefs = getPinnedSharedPrefs(this);
263        super.onCreate(savedInstanceState, target, title, defaultTitleRes, initialIntents,
264                null, false);
265
266        MetricsLogger.action(this, MetricsEvent.ACTION_ACTIVITY_CHOOSER_SHOWN);
267
268        mChooserShownTime = System.currentTimeMillis();
269        final long systemCost = mChooserShownTime - intentReceivedTime;
270        MetricsLogger.histogram(null, "system_cost_for_smart_sharing", (int) systemCost);
271        if (DEBUG) {
272            Log.d(TAG, "System Time Cost is " + systemCost);
273        }
274    }
275
276    static SharedPreferences getPinnedSharedPrefs(Context context) {
277        // The code below is because in the android:ui process, no one can hear you scream.
278        // The package info in the context isn't initialized in the way it is for normal apps,
279        // so the standard, name-based context.getSharedPreferences doesn't work. Instead, we
280        // build the path manually below using the same policy that appears in ContextImpl.
281        // This fails silently under the hood if there's a problem, so if we find ourselves in
282        // the case where we don't have access to credential encrypted storage we just won't
283        // have our pinned target info.
284        final File prefsFile = new File(new File(
285                Environment.getDataUserCePackageDirectory(StorageManager.UUID_PRIVATE_INTERNAL,
286                        context.getUserId(), context.getPackageName()),
287                "shared_prefs"),
288                PINNED_SHARED_PREFS_NAME + ".xml");
289        return context.getSharedPreferences(prefsFile, MODE_PRIVATE);
290    }
291
292    @Override
293    protected void onDestroy() {
294        super.onDestroy();
295        if (mRefinementResultReceiver != null) {
296            mRefinementResultReceiver.destroy();
297            mRefinementResultReceiver = null;
298        }
299        unbindRemainingServices();
300        mChooserHandler.removeMessages(CHOOSER_TARGET_SERVICE_RESULT);
301    }
302
303    @Override
304    public Intent getReplacementIntent(ActivityInfo aInfo, Intent defIntent) {
305        Intent result = defIntent;
306        if (mReplacementExtras != null) {
307            final Bundle replExtras = mReplacementExtras.getBundle(aInfo.packageName);
308            if (replExtras != null) {
309                result = new Intent(defIntent);
310                result.putExtras(replExtras);
311            }
312        }
313        if (aInfo.name.equals(IntentForwarderActivity.FORWARD_INTENT_TO_PARENT)
314                || aInfo.name.equals(IntentForwarderActivity.FORWARD_INTENT_TO_MANAGED_PROFILE)) {
315            result = Intent.createChooser(result,
316                    getIntent().getCharSequenceExtra(Intent.EXTRA_TITLE));
317
318            // Don't auto-launch single intents if the intent is being forwarded. This is done
319            // because automatically launching a resolving application as a response to the user
320            // action of switching accounts is pretty unexpected.
321            result.putExtra(Intent.EXTRA_AUTO_LAUNCH_SINGLE_CHOICE, false);
322        }
323        return result;
324    }
325
326    @Override
327    public void onActivityStarted(TargetInfo cti) {
328        if (mChosenComponentSender != null) {
329            final ComponentName target = cti.getResolvedComponentName();
330            if (target != null) {
331                final Intent fillIn = new Intent().putExtra(Intent.EXTRA_CHOSEN_COMPONENT, target);
332                try {
333                    mChosenComponentSender.sendIntent(this, Activity.RESULT_OK, fillIn, null, null);
334                } catch (IntentSender.SendIntentException e) {
335                    Slog.e(TAG, "Unable to launch supplied IntentSender to report "
336                            + "the chosen component: " + e);
337                }
338            }
339        }
340    }
341
342    @Override
343    public void onPrepareAdapterView(AbsListView adapterView, ResolveListAdapter adapter,
344            boolean alwaysUseOption) {
345        final ListView listView = adapterView instanceof ListView ? (ListView) adapterView : null;
346        mChooserListAdapter = (ChooserListAdapter) adapter;
347        if (mCallerChooserTargets != null && mCallerChooserTargets.length > 0) {
348            mChooserListAdapter.addServiceResults(null, Lists.newArrayList(mCallerChooserTargets));
349        }
350        mChooserRowAdapter = new ChooserRowAdapter(mChooserListAdapter);
351        mChooserRowAdapter.registerDataSetObserver(new OffsetDataSetObserver(adapterView));
352        adapterView.setAdapter(mChooserRowAdapter);
353        if (listView != null) {
354            listView.setItemsCanFocus(true);
355        }
356    }
357
358    @Override
359    public int getLayoutResource() {
360        return R.layout.chooser_grid;
361    }
362
363    @Override
364    public boolean shouldGetActivityMetadata() {
365        return true;
366    }
367
368    @Override
369    public boolean shouldAutoLaunchSingleChoice(TargetInfo target) {
370        return getIntent().getBooleanExtra(Intent.EXTRA_AUTO_LAUNCH_SINGLE_CHOICE,
371                super.shouldAutoLaunchSingleChoice(target));
372    }
373
374    @Override
375    public void showTargetDetails(ResolveInfo ri) {
376        ComponentName name = ri.activityInfo.getComponentName();
377        boolean pinned = mPinnedSharedPrefs.getBoolean(name.flattenToString(), false);
378        ResolverTargetActionsDialogFragment f =
379                new ResolverTargetActionsDialogFragment(ri.loadLabel(getPackageManager()),
380                        name, pinned);
381        f.show(getFragmentManager(), TARGET_DETAILS_FRAGMENT_TAG);
382    }
383
384    private void modifyTargetIntent(Intent in) {
385        final String action = in.getAction();
386        if (Intent.ACTION_SEND.equals(action) ||
387                Intent.ACTION_SEND_MULTIPLE.equals(action)) {
388            in.addFlags(Intent.FLAG_ACTIVITY_NEW_DOCUMENT |
389                    Intent.FLAG_ACTIVITY_MULTIPLE_TASK);
390        }
391    }
392
393    @Override
394    protected boolean onTargetSelected(TargetInfo target, boolean alwaysCheck) {
395        if (mRefinementIntentSender != null) {
396            final Intent fillIn = new Intent();
397            final List<Intent> sourceIntents = target.getAllSourceIntents();
398            if (!sourceIntents.isEmpty()) {
399                fillIn.putExtra(Intent.EXTRA_INTENT, sourceIntents.get(0));
400                if (sourceIntents.size() > 1) {
401                    final Intent[] alts = new Intent[sourceIntents.size() - 1];
402                    for (int i = 1, N = sourceIntents.size(); i < N; i++) {
403                        alts[i - 1] = sourceIntents.get(i);
404                    }
405                    fillIn.putExtra(Intent.EXTRA_ALTERNATE_INTENTS, alts);
406                }
407                if (mRefinementResultReceiver != null) {
408                    mRefinementResultReceiver.destroy();
409                }
410                mRefinementResultReceiver = new RefinementResultReceiver(this, target, null);
411                fillIn.putExtra(Intent.EXTRA_RESULT_RECEIVER,
412                        mRefinementResultReceiver);
413                try {
414                    mRefinementIntentSender.sendIntent(this, 0, fillIn, null, null);
415                    return false;
416                } catch (SendIntentException e) {
417                    Log.e(TAG, "Refinement IntentSender failed to send", e);
418                }
419            }
420        }
421        updateModelAndChooserCounts(target);
422        return super.onTargetSelected(target, alwaysCheck);
423    }
424
425    @Override
426    public void startSelected(int which, boolean always, boolean filtered) {
427        final long selectionCost = System.currentTimeMillis() - mChooserShownTime;
428        super.startSelected(which, always, filtered);
429
430        if (mChooserListAdapter != null) {
431            // Log the index of which type of target the user picked.
432            // Lower values mean the ranking was better.
433            int cat = 0;
434            int value = which;
435            switch (mChooserListAdapter.getPositionTargetType(which)) {
436                case ChooserListAdapter.TARGET_CALLER:
437                    cat = MetricsEvent.ACTION_ACTIVITY_CHOOSER_PICKED_APP_TARGET;
438                    break;
439                case ChooserListAdapter.TARGET_SERVICE:
440                    cat = MetricsEvent.ACTION_ACTIVITY_CHOOSER_PICKED_SERVICE_TARGET;
441                    value -= mChooserListAdapter.getCallerTargetCount();
442                    break;
443                case ChooserListAdapter.TARGET_STANDARD:
444                    cat = MetricsEvent.ACTION_ACTIVITY_CHOOSER_PICKED_STANDARD_TARGET;
445                    value -= mChooserListAdapter.getCallerTargetCount()
446                            + mChooserListAdapter.getServiceTargetCount();
447                    break;
448            }
449
450            if (cat != 0) {
451                MetricsLogger.action(this, cat, value);
452            }
453
454            if (mIsSuccessfullySelected) {
455                if (DEBUG) {
456                    Log.d(TAG, "User Selection Time Cost is " + selectionCost);
457                    Log.d(TAG, "position of selected app/service/caller is " +
458                            Integer.toString(value));
459                }
460                MetricsLogger.histogram(null, "user_selection_cost_for_smart_sharing",
461                        (int) selectionCost);
462                MetricsLogger.histogram(null, "app_position_for_smart_sharing", value);
463            }
464        }
465    }
466
467    void queryTargetServices(ChooserListAdapter adapter) {
468        final PackageManager pm = getPackageManager();
469        int targetsToQuery = 0;
470        for (int i = 0, N = adapter.getDisplayResolveInfoCount(); i < N; i++) {
471            final DisplayResolveInfo dri = adapter.getDisplayResolveInfo(i);
472            if (adapter.getScore(dri) == 0) {
473                // A score of 0 means the app hasn't been used in some time;
474                // don't query it as it's not likely to be relevant.
475                continue;
476            }
477            final ActivityInfo ai = dri.getResolveInfo().activityInfo;
478            final Bundle md = ai.metaData;
479            final String serviceName = md != null ? convertServiceName(ai.packageName,
480                    md.getString(ChooserTargetService.META_DATA_NAME)) : null;
481            if (serviceName != null) {
482                final ComponentName serviceComponent = new ComponentName(
483                        ai.packageName, serviceName);
484                final Intent serviceIntent = new Intent(ChooserTargetService.SERVICE_INTERFACE)
485                        .setComponent(serviceComponent);
486
487                if (DEBUG) {
488                    Log.d(TAG, "queryTargets found target with service " + serviceComponent);
489                }
490
491                try {
492                    final String perm = pm.getServiceInfo(serviceComponent, 0).permission;
493                    if (!ChooserTargetService.BIND_PERMISSION.equals(perm)) {
494                        Log.w(TAG, "ChooserTargetService " + serviceComponent + " does not require"
495                                + " permission " + ChooserTargetService.BIND_PERMISSION
496                                + " - this service will not be queried for ChooserTargets."
497                                + " add android:permission=\""
498                                + ChooserTargetService.BIND_PERMISSION + "\""
499                                + " to the <service> tag for " + serviceComponent
500                                + " in the manifest.");
501                        continue;
502                    }
503                } catch (NameNotFoundException e) {
504                    Log.e(TAG, "Could not look up service " + serviceComponent
505                            + "; component name not found");
506                    continue;
507                }
508
509                final ChooserTargetServiceConnection conn =
510                        new ChooserTargetServiceConnection(this, dri);
511
512                // Explicitly specify Process.myUserHandle instead of calling bindService
513                // to avoid the warning from calling from the system process without an explicit
514                // user handle
515                if (bindServiceAsUser(serviceIntent, conn, BIND_AUTO_CREATE | BIND_NOT_FOREGROUND,
516                        Process.myUserHandle())) {
517                    if (DEBUG) {
518                        Log.d(TAG, "Binding service connection for target " + dri
519                                + " intent " + serviceIntent);
520                    }
521                    mServiceConnections.add(conn);
522                    targetsToQuery++;
523                }
524            }
525            if (targetsToQuery >= QUERY_TARGET_SERVICE_LIMIT) {
526                if (DEBUG) Log.d(TAG, "queryTargets hit query target limit "
527                        + QUERY_TARGET_SERVICE_LIMIT);
528                break;
529            }
530        }
531
532        if (!mServiceConnections.isEmpty()) {
533            if (DEBUG) Log.d(TAG, "queryTargets setting watchdog timer for "
534                    + WATCHDOG_TIMEOUT_MILLIS + "ms");
535            mChooserHandler.sendEmptyMessageDelayed(CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT,
536                    WATCHDOG_TIMEOUT_MILLIS);
537        } else {
538            sendVoiceChoicesIfNeeded();
539        }
540    }
541
542    private String convertServiceName(String packageName, String serviceName) {
543        if (TextUtils.isEmpty(serviceName)) {
544            return null;
545        }
546
547        final String fullName;
548        if (serviceName.startsWith(".")) {
549            // Relative to the app package. Prepend the app package name.
550            fullName = packageName + serviceName;
551        } else if (serviceName.indexOf('.') >= 0) {
552            // Fully qualified package name.
553            fullName = serviceName;
554        } else {
555            fullName = null;
556        }
557        return fullName;
558    }
559
560    void unbindRemainingServices() {
561        if (DEBUG) {
562            Log.d(TAG, "unbindRemainingServices, " + mServiceConnections.size() + " left");
563        }
564        for (int i = 0, N = mServiceConnections.size(); i < N; i++) {
565            final ChooserTargetServiceConnection conn = mServiceConnections.get(i);
566            if (DEBUG) Log.d(TAG, "unbinding " + conn);
567            unbindService(conn);
568            conn.destroy();
569        }
570        mServiceConnections.clear();
571        mChooserHandler.removeMessages(CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT);
572    }
573
574    public void onSetupVoiceInteraction() {
575        // Do nothing. We'll send the voice stuff ourselves.
576    }
577
578    void updateModelAndChooserCounts(TargetInfo info) {
579        if (info != null) {
580            final ResolveInfo ri = info.getResolveInfo();
581            Intent targetIntent = getTargetIntent();
582            if (ri != null && ri.activityInfo != null && targetIntent != null) {
583                if (mAdapter != null) {
584                    mAdapter.updateModel(info.getResolvedComponentName());
585                    mAdapter.updateChooserCounts(ri.activityInfo.packageName, getUserId(),
586                            targetIntent.getAction());
587                }
588                if (DEBUG) {
589                    Log.d(TAG, "ResolveInfo Package is " + ri.activityInfo.packageName);
590                    Log.d(TAG, "Action to be updated is " + targetIntent.getAction());
591                }
592            } else if(DEBUG) {
593                Log.d(TAG, "Can not log Chooser Counts of null ResovleInfo");
594            }
595        }
596        mIsSuccessfullySelected = true;
597    }
598
599    void onRefinementResult(TargetInfo selectedTarget, Intent matchingIntent) {
600        if (mRefinementResultReceiver != null) {
601            mRefinementResultReceiver.destroy();
602            mRefinementResultReceiver = null;
603        }
604        if (selectedTarget == null) {
605            Log.e(TAG, "Refinement result intent did not match any known targets; canceling");
606        } else if (!checkTargetSourceIntent(selectedTarget, matchingIntent)) {
607            Log.e(TAG, "onRefinementResult: Selected target " + selectedTarget
608                    + " cannot match refined source intent " + matchingIntent);
609        } else {
610            TargetInfo clonedTarget = selectedTarget.cloneFilledIn(matchingIntent, 0);
611            if (super.onTargetSelected(clonedTarget, false)) {
612                updateModelAndChooserCounts(clonedTarget);
613                finish();
614                return;
615            }
616        }
617        onRefinementCanceled();
618    }
619
620    void onRefinementCanceled() {
621        if (mRefinementResultReceiver != null) {
622            mRefinementResultReceiver.destroy();
623            mRefinementResultReceiver = null;
624        }
625        finish();
626    }
627
628    boolean checkTargetSourceIntent(TargetInfo target, Intent matchingIntent) {
629        final List<Intent> targetIntents = target.getAllSourceIntents();
630        for (int i = 0, N = targetIntents.size(); i < N; i++) {
631            final Intent targetIntent = targetIntents.get(i);
632            if (targetIntent.filterEquals(matchingIntent)) {
633                return true;
634            }
635        }
636        return false;
637    }
638
639    void filterServiceTargets(String packageName, List<ChooserTarget> targets) {
640        if (targets == null) {
641            return;
642        }
643
644        final PackageManager pm = getPackageManager();
645        for (int i = targets.size() - 1; i >= 0; i--) {
646            final ChooserTarget target = targets.get(i);
647            final ComponentName targetName = target.getComponentName();
648            if (packageName != null && packageName.equals(targetName.getPackageName())) {
649                // Anything from the original target's package is fine.
650                continue;
651            }
652
653            boolean remove;
654            try {
655                final ActivityInfo ai = pm.getActivityInfo(targetName, 0);
656                remove = !ai.exported || ai.permission != null;
657            } catch (NameNotFoundException e) {
658                Log.e(TAG, "Target " + target + " returned by " + packageName
659                        + " component not found");
660                remove = true;
661            }
662
663            if (remove) {
664                targets.remove(i);
665            }
666        }
667    }
668
669    public class ChooserListController extends ResolverListController {
670        public ChooserListController(Context context,
671                PackageManager pm,
672                Intent targetIntent,
673                String referrerPackageName,
674                int launchedFromUid) {
675            super(context, pm, targetIntent, referrerPackageName, launchedFromUid);
676        }
677
678        @Override
679        boolean isComponentPinned(ComponentName name) {
680            return mPinnedSharedPrefs.getBoolean(name.flattenToString(), false);
681        }
682
683        @Override
684        boolean isComponentFiltered(ComponentName name) {
685            if (mFilteredComponentNames == null) {
686                return false;
687            }
688            for (ComponentName filteredComponentName : mFilteredComponentNames) {
689                if (name.equals(filteredComponentName)) {
690                    return true;
691                }
692            }
693            return false;
694        }
695
696        @Override
697        public float getScore(DisplayResolveInfo target) {
698            if (target == null) {
699                return CALLER_TARGET_SCORE_BOOST;
700            }
701            float score = super.getScore(target);
702            if (target.isPinned()) {
703                score += PINNED_TARGET_SCORE_BOOST;
704            }
705            return score;
706        }
707    }
708
709    @Override
710    public ResolveListAdapter createAdapter(Context context, List<Intent> payloadIntents,
711            Intent[] initialIntents, List<ResolveInfo> rList, int launchedFromUid,
712            boolean filterLastUsed) {
713        final ChooserListAdapter adapter = new ChooserListAdapter(context, payloadIntents,
714                initialIntents, rList, launchedFromUid, filterLastUsed, createListController());
715        return adapter;
716    }
717
718    @VisibleForTesting
719    protected ResolverListController createListController() {
720        return new ChooserListController(
721                this,
722                mPm,
723                getTargetIntent(),
724                getReferrerPackageName(),
725                mLaunchedFromUid);
726    }
727
728    final class ChooserTargetInfo implements TargetInfo {
729        private final DisplayResolveInfo mSourceInfo;
730        private final ResolveInfo mBackupResolveInfo;
731        private final ChooserTarget mChooserTarget;
732        private Drawable mBadgeIcon = null;
733        private CharSequence mBadgeContentDescription;
734        private Drawable mDisplayIcon;
735        private final Intent mFillInIntent;
736        private final int mFillInFlags;
737        private final float mModifiedScore;
738
739        public ChooserTargetInfo(DisplayResolveInfo sourceInfo, ChooserTarget chooserTarget,
740                float modifiedScore) {
741            mSourceInfo = sourceInfo;
742            mChooserTarget = chooserTarget;
743            mModifiedScore = modifiedScore;
744            if (sourceInfo != null) {
745                final ResolveInfo ri = sourceInfo.getResolveInfo();
746                if (ri != null) {
747                    final ActivityInfo ai = ri.activityInfo;
748                    if (ai != null && ai.applicationInfo != null) {
749                        final PackageManager pm = getPackageManager();
750                        mBadgeIcon = pm.getApplicationIcon(ai.applicationInfo);
751                        mBadgeContentDescription = pm.getApplicationLabel(ai.applicationInfo);
752                    }
753                }
754            }
755            final Icon icon = chooserTarget.getIcon();
756            // TODO do this in the background
757            mDisplayIcon = icon != null ? icon.loadDrawable(ChooserActivity.this) : null;
758
759            if (sourceInfo != null) {
760                mBackupResolveInfo = null;
761            } else {
762                mBackupResolveInfo = getPackageManager().resolveActivity(getResolvedIntent(), 0);
763            }
764
765            mFillInIntent = null;
766            mFillInFlags = 0;
767        }
768
769        private ChooserTargetInfo(ChooserTargetInfo other, Intent fillInIntent, int flags) {
770            mSourceInfo = other.mSourceInfo;
771            mBackupResolveInfo = other.mBackupResolveInfo;
772            mChooserTarget = other.mChooserTarget;
773            mBadgeIcon = other.mBadgeIcon;
774            mBadgeContentDescription = other.mBadgeContentDescription;
775            mDisplayIcon = other.mDisplayIcon;
776            mFillInIntent = fillInIntent;
777            mFillInFlags = flags;
778            mModifiedScore = other.mModifiedScore;
779        }
780
781        public float getModifiedScore() {
782            return mModifiedScore;
783        }
784
785        @Override
786        public Intent getResolvedIntent() {
787            if (mSourceInfo != null) {
788                return mSourceInfo.getResolvedIntent();
789            }
790
791            final Intent targetIntent = new Intent(getTargetIntent());
792            targetIntent.setComponent(mChooserTarget.getComponentName());
793            targetIntent.putExtras(mChooserTarget.getIntentExtras());
794            return targetIntent;
795        }
796
797        @Override
798        public ComponentName getResolvedComponentName() {
799            if (mSourceInfo != null) {
800                return mSourceInfo.getResolvedComponentName();
801            } else if (mBackupResolveInfo != null) {
802                return new ComponentName(mBackupResolveInfo.activityInfo.packageName,
803                        mBackupResolveInfo.activityInfo.name);
804            }
805            return null;
806        }
807
808        private Intent getBaseIntentToSend() {
809            Intent result = getResolvedIntent();
810            if (result == null) {
811                Log.e(TAG, "ChooserTargetInfo: no base intent available to send");
812            } else {
813                result = new Intent(result);
814                if (mFillInIntent != null) {
815                    result.fillIn(mFillInIntent, mFillInFlags);
816                }
817                result.fillIn(mReferrerFillInIntent, 0);
818            }
819            return result;
820        }
821
822        @Override
823        public boolean start(Activity activity, Bundle options) {
824            throw new RuntimeException("ChooserTargets should be started as caller.");
825        }
826
827        @Override
828        public boolean startAsCaller(Activity activity, Bundle options, int userId) {
829            final Intent intent = getBaseIntentToSend();
830            if (intent == null) {
831                return false;
832            }
833            intent.setComponent(mChooserTarget.getComponentName());
834            intent.putExtras(mChooserTarget.getIntentExtras());
835
836            // Important: we will ignore the target security checks in ActivityManager
837            // if and only if the ChooserTarget's target package is the same package
838            // where we got the ChooserTargetService that provided it. This lets a
839            // ChooserTargetService provide a non-exported or permission-guarded target
840            // to the chooser for the user to pick.
841            //
842            // If mSourceInfo is null, we got this ChooserTarget from the caller or elsewhere
843            // so we'll obey the caller's normal security checks.
844            final boolean ignoreTargetSecurity = mSourceInfo != null
845                    && mSourceInfo.getResolvedComponentName().getPackageName()
846                    .equals(mChooserTarget.getComponentName().getPackageName());
847            activity.startActivityAsCaller(intent, options, ignoreTargetSecurity, userId);
848            return true;
849        }
850
851        @Override
852        public boolean startAsUser(Activity activity, Bundle options, UserHandle user) {
853            throw new RuntimeException("ChooserTargets should be started as caller.");
854        }
855
856        @Override
857        public ResolveInfo getResolveInfo() {
858            return mSourceInfo != null ? mSourceInfo.getResolveInfo() : mBackupResolveInfo;
859        }
860
861        @Override
862        public CharSequence getDisplayLabel() {
863            return mChooserTarget.getTitle();
864        }
865
866        @Override
867        public CharSequence getExtendedInfo() {
868            // ChooserTargets have badge icons, so we won't show the extended info to disambiguate.
869            return null;
870        }
871
872        @Override
873        public Drawable getDisplayIcon() {
874            return mDisplayIcon;
875        }
876
877        @Override
878        public Drawable getBadgeIcon() {
879            return mBadgeIcon;
880        }
881
882        @Override
883        public CharSequence getBadgeContentDescription() {
884            return mBadgeContentDescription;
885        }
886
887        @Override
888        public TargetInfo cloneFilledIn(Intent fillInIntent, int flags) {
889            return new ChooserTargetInfo(this, fillInIntent, flags);
890        }
891
892        @Override
893        public List<Intent> getAllSourceIntents() {
894            final List<Intent> results = new ArrayList<>();
895            if (mSourceInfo != null) {
896                // We only queried the service for the first one in our sourceinfo.
897                results.add(mSourceInfo.getAllSourceIntents().get(0));
898            }
899            return results;
900        }
901
902        @Override
903        public boolean isPinned() {
904            return mSourceInfo != null ? mSourceInfo.isPinned() : false;
905        }
906    }
907
908    public class ChooserListAdapter extends ResolveListAdapter {
909        public static final int TARGET_BAD = -1;
910        public static final int TARGET_CALLER = 0;
911        public static final int TARGET_SERVICE = 1;
912        public static final int TARGET_STANDARD = 2;
913
914        private static final int MAX_SERVICE_TARGETS = 8;
915        private static final int MAX_TARGETS_PER_SERVICE = 4;
916
917        private final List<ChooserTargetInfo> mServiceTargets = new ArrayList<>();
918        private final List<TargetInfo> mCallerTargets = new ArrayList<>();
919        private boolean mShowServiceTargets;
920
921        private float mLateFee = 1.f;
922
923        private final BaseChooserTargetComparator mBaseTargetComparator
924                = new BaseChooserTargetComparator();
925
926        public ChooserListAdapter(Context context, List<Intent> payloadIntents,
927                Intent[] initialIntents, List<ResolveInfo> rList, int launchedFromUid,
928                boolean filterLastUsed, ResolverListController resolverListController) {
929            // Don't send the initial intents through the shared ResolverActivity path,
930            // we want to separate them into a different section.
931            super(context, payloadIntents, null, rList, launchedFromUid, filterLastUsed,
932                    resolverListController);
933
934            if (initialIntents != null) {
935                final PackageManager pm = getPackageManager();
936                for (int i = 0; i < initialIntents.length; i++) {
937                    final Intent ii = initialIntents[i];
938                    if (ii == null) {
939                        continue;
940                    }
941
942                    // We reimplement Intent#resolveActivityInfo here because if we have an
943                    // implicit intent, we want the ResolveInfo returned by PackageManager
944                    // instead of one we reconstruct ourselves. The ResolveInfo returned might
945                    // have extra metadata and resolvePackageName set and we want to respect that.
946                    ResolveInfo ri = null;
947                    ActivityInfo ai = null;
948                    final ComponentName cn = ii.getComponent();
949                    if (cn != null) {
950                        try {
951                            ai = pm.getActivityInfo(ii.getComponent(), 0);
952                            ri = new ResolveInfo();
953                            ri.activityInfo = ai;
954                        } catch (PackageManager.NameNotFoundException ignored) {
955                            // ai will == null below
956                        }
957                    }
958                    if (ai == null) {
959                        ri = pm.resolveActivity(ii, PackageManager.MATCH_DEFAULT_ONLY);
960                        ai = ri != null ? ri.activityInfo : null;
961                    }
962                    if (ai == null) {
963                        Log.w(TAG, "No activity found for " + ii);
964                        continue;
965                    }
966                    UserManager userManager =
967                            (UserManager) getSystemService(Context.USER_SERVICE);
968                    if (ii instanceof LabeledIntent) {
969                        LabeledIntent li = (LabeledIntent)ii;
970                        ri.resolvePackageName = li.getSourcePackage();
971                        ri.labelRes = li.getLabelResource();
972                        ri.nonLocalizedLabel = li.getNonLocalizedLabel();
973                        ri.icon = li.getIconResource();
974                        ri.iconResourceId = ri.icon;
975                    }
976                    if (userManager.isManagedProfile()) {
977                        ri.noResourceId = true;
978                        ri.icon = 0;
979                    }
980                    mCallerTargets.add(new DisplayResolveInfo(ii, ri,
981                            ri.loadLabel(pm), null, ii));
982                }
983            }
984        }
985
986        @Override
987        public boolean showsExtendedInfo(TargetInfo info) {
988            // We have badges so we don't need this text shown.
989            return false;
990        }
991
992        @Override
993        public boolean isComponentPinned(ComponentName name) {
994            return mPinnedSharedPrefs.getBoolean(name.flattenToString(), false);
995        }
996
997        @Override
998        public View onCreateView(ViewGroup parent) {
999            return mInflater.inflate(
1000                    com.android.internal.R.layout.resolve_grid_item, parent, false);
1001        }
1002
1003        @Override
1004        public void onListRebuilt() {
1005            if (mServiceTargets != null) {
1006                pruneServiceTargets();
1007            }
1008            if (DEBUG) Log.d(TAG, "List built querying services");
1009            queryTargetServices(this);
1010        }
1011
1012        @Override
1013        public boolean shouldGetResolvedFilter() {
1014            return true;
1015        }
1016
1017        @Override
1018        public int getCount() {
1019            return super.getCount() + getServiceTargetCount() + getCallerTargetCount();
1020        }
1021
1022        @Override
1023        public int getUnfilteredCount() {
1024            return super.getUnfilteredCount() + getServiceTargetCount() + getCallerTargetCount();
1025        }
1026
1027        public int getCallerTargetCount() {
1028            return mCallerTargets.size();
1029        }
1030
1031        public int getServiceTargetCount() {
1032            if (!mShowServiceTargets) {
1033                return 0;
1034            }
1035            return Math.min(mServiceTargets.size(), MAX_SERVICE_TARGETS);
1036        }
1037
1038        public int getStandardTargetCount() {
1039            return super.getCount();
1040        }
1041
1042        public int getPositionTargetType(int position) {
1043            int offset = 0;
1044
1045            final int callerTargetCount = getCallerTargetCount();
1046            if (position < callerTargetCount) {
1047                return TARGET_CALLER;
1048            }
1049            offset += callerTargetCount;
1050
1051            final int serviceTargetCount = getServiceTargetCount();
1052            if (position - offset < serviceTargetCount) {
1053                return TARGET_SERVICE;
1054            }
1055            offset += serviceTargetCount;
1056
1057            final int standardTargetCount = super.getCount();
1058            if (position - offset < standardTargetCount) {
1059                return TARGET_STANDARD;
1060            }
1061
1062            return TARGET_BAD;
1063        }
1064
1065        @Override
1066        public TargetInfo getItem(int position) {
1067            return targetInfoForPosition(position, true);
1068        }
1069
1070        @Override
1071        public TargetInfo targetInfoForPosition(int position, boolean filtered) {
1072            int offset = 0;
1073
1074            final int callerTargetCount = getCallerTargetCount();
1075            if (position < callerTargetCount) {
1076                return mCallerTargets.get(position);
1077            }
1078            offset += callerTargetCount;
1079
1080            final int serviceTargetCount = getServiceTargetCount();
1081            if (position - offset < serviceTargetCount) {
1082                return mServiceTargets.get(position - offset);
1083            }
1084            offset += serviceTargetCount;
1085
1086            return filtered ? super.getItem(position - offset)
1087                    : getDisplayInfoAt(position - offset);
1088        }
1089
1090        public void addServiceResults(DisplayResolveInfo origTarget, List<ChooserTarget> targets) {
1091            if (DEBUG) Log.d(TAG, "addServiceResults " + origTarget + ", " + targets.size()
1092                    + " targets");
1093            final float parentScore = getScore(origTarget);
1094            Collections.sort(targets, mBaseTargetComparator);
1095            float lastScore = 0;
1096            for (int i = 0, N = Math.min(targets.size(), MAX_TARGETS_PER_SERVICE); i < N; i++) {
1097                final ChooserTarget target = targets.get(i);
1098                float targetScore = target.getScore();
1099                targetScore *= parentScore;
1100                targetScore *= mLateFee;
1101                if (i > 0 && targetScore >= lastScore) {
1102                    // Apply a decay so that the top app can't crowd out everything else.
1103                    // This incents ChooserTargetServices to define what's truly better.
1104                    targetScore = lastScore * 0.95f;
1105                }
1106                insertServiceTarget(new ChooserTargetInfo(origTarget, target, targetScore));
1107
1108                if (DEBUG) {
1109                    Log.d(TAG, " => " + target.toString() + " score=" + targetScore
1110                            + " base=" + target.getScore()
1111                            + " lastScore=" + lastScore
1112                            + " parentScore=" + parentScore
1113                            + " lateFee=" + mLateFee);
1114                }
1115
1116                lastScore = targetScore;
1117            }
1118
1119            mLateFee *= 0.95f;
1120
1121            notifyDataSetChanged();
1122        }
1123
1124        /**
1125         * Set to true to reveal all service targets at once.
1126         */
1127        public void setShowServiceTargets(boolean show) {
1128            mShowServiceTargets = show;
1129            notifyDataSetChanged();
1130        }
1131
1132        private void insertServiceTarget(ChooserTargetInfo chooserTargetInfo) {
1133            final float newScore = chooserTargetInfo.getModifiedScore();
1134            for (int i = 0, N = mServiceTargets.size(); i < N; i++) {
1135                final ChooserTargetInfo serviceTarget = mServiceTargets.get(i);
1136                if (newScore > serviceTarget.getModifiedScore()) {
1137                    mServiceTargets.add(i, chooserTargetInfo);
1138                    return;
1139                }
1140            }
1141            mServiceTargets.add(chooserTargetInfo);
1142        }
1143
1144        private void pruneServiceTargets() {
1145            if (DEBUG) Log.d(TAG, "pruneServiceTargets");
1146            for (int i = mServiceTargets.size() - 1; i >= 0; i--) {
1147                final ChooserTargetInfo cti = mServiceTargets.get(i);
1148                if (!hasResolvedTarget(cti.getResolveInfo())) {
1149                    if (DEBUG) Log.d(TAG, " => " + i + " " + cti);
1150                    mServiceTargets.remove(i);
1151                }
1152            }
1153        }
1154    }
1155
1156    static class BaseChooserTargetComparator implements Comparator<ChooserTarget> {
1157        @Override
1158        public int compare(ChooserTarget lhs, ChooserTarget rhs) {
1159            // Descending order
1160            return (int) Math.signum(rhs.getScore() - lhs.getScore());
1161        }
1162    }
1163
1164    static class RowScale {
1165        private static final int DURATION = 400;
1166
1167        float mScale;
1168        ChooserRowAdapter mAdapter;
1169        private final ObjectAnimator mAnimator;
1170
1171        public static final FloatProperty<RowScale> PROPERTY =
1172                new FloatProperty<RowScale>("scale") {
1173            @Override
1174            public void setValue(RowScale object, float value) {
1175                object.mScale = value;
1176                object.mAdapter.notifyDataSetChanged();
1177            }
1178
1179            @Override
1180            public Float get(RowScale object) {
1181                return object.mScale;
1182            }
1183        };
1184
1185        public RowScale(@NonNull ChooserRowAdapter adapter, float from, float to) {
1186            mAdapter = adapter;
1187            mScale = from;
1188            if (from == to) {
1189                mAnimator = null;
1190                return;
1191            }
1192
1193            mAnimator = ObjectAnimator.ofFloat(this, PROPERTY, from, to).setDuration(DURATION);
1194        }
1195
1196        public RowScale setInterpolator(Interpolator interpolator) {
1197            if (mAnimator != null) {
1198                mAnimator.setInterpolator(interpolator);
1199            }
1200            return this;
1201        }
1202
1203        public float get() {
1204            return mScale;
1205        }
1206
1207        public void startAnimation() {
1208            if (mAnimator != null) {
1209                mAnimator.start();
1210            }
1211        }
1212
1213        public void cancelAnimation() {
1214            if (mAnimator != null) {
1215                mAnimator.cancel();
1216            }
1217        }
1218    }
1219
1220    class ChooserRowAdapter extends BaseAdapter {
1221        private ChooserListAdapter mChooserListAdapter;
1222        private final LayoutInflater mLayoutInflater;
1223        private final int mColumnCount = 4;
1224        private RowScale[] mServiceTargetScale;
1225        private final Interpolator mInterpolator;
1226
1227        public ChooserRowAdapter(ChooserListAdapter wrappedAdapter) {
1228            mChooserListAdapter = wrappedAdapter;
1229            mLayoutInflater = LayoutInflater.from(ChooserActivity.this);
1230
1231            mInterpolator = AnimationUtils.loadInterpolator(ChooserActivity.this,
1232                    android.R.interpolator.decelerate_quint);
1233
1234            wrappedAdapter.registerDataSetObserver(new DataSetObserver() {
1235                @Override
1236                public void onChanged() {
1237                    super.onChanged();
1238                    final int rcount = getServiceTargetRowCount();
1239                    if (mServiceTargetScale == null
1240                            || mServiceTargetScale.length != rcount) {
1241                        RowScale[] old = mServiceTargetScale;
1242                        int oldRCount = old != null ? old.length : 0;
1243                        mServiceTargetScale = new RowScale[rcount];
1244                        if (old != null && rcount > 0) {
1245                            System.arraycopy(old, 0, mServiceTargetScale, 0,
1246                                    Math.min(old.length, rcount));
1247                        }
1248
1249                        for (int i = rcount; i < oldRCount; i++) {
1250                            old[i].cancelAnimation();
1251                        }
1252
1253                        for (int i = oldRCount; i < rcount; i++) {
1254                            final RowScale rs = new RowScale(ChooserRowAdapter.this, 0.f, 1.f)
1255                                    .setInterpolator(mInterpolator);
1256                            mServiceTargetScale[i] = rs;
1257                        }
1258
1259                        // Start the animations in a separate loop.
1260                        // The process of starting animations will result in
1261                        // binding views to set up initial values, and we must
1262                        // have ALL of the new RowScale objects created above before
1263                        // we get started.
1264                        for (int i = oldRCount; i < rcount; i++) {
1265                            mServiceTargetScale[i].startAnimation();
1266                        }
1267                    }
1268
1269                    notifyDataSetChanged();
1270                }
1271
1272                @Override
1273                public void onInvalidated() {
1274                    super.onInvalidated();
1275                    notifyDataSetInvalidated();
1276                    if (mServiceTargetScale != null) {
1277                        for (RowScale rs : mServiceTargetScale) {
1278                            rs.cancelAnimation();
1279                        }
1280                    }
1281                }
1282            });
1283        }
1284
1285        private float getRowScale(int rowPosition) {
1286            final int start = getCallerTargetRowCount();
1287            final int end = start + getServiceTargetRowCount();
1288            if (rowPosition >= start && rowPosition < end) {
1289                return mServiceTargetScale[rowPosition - start].get();
1290            }
1291            return 1.f;
1292        }
1293
1294        @Override
1295        public int getCount() {
1296            return (int) (
1297                    getCallerTargetRowCount()
1298                    + getServiceTargetRowCount()
1299                    + Math.ceil((float) mChooserListAdapter.getStandardTargetCount() / mColumnCount)
1300            );
1301        }
1302
1303        public int getCallerTargetRowCount() {
1304            return (int) Math.ceil(
1305                    (float) mChooserListAdapter.getCallerTargetCount() / mColumnCount);
1306        }
1307
1308        public int getServiceTargetRowCount() {
1309            return (int) Math.ceil(
1310                    (float) mChooserListAdapter.getServiceTargetCount() / mColumnCount);
1311        }
1312
1313        @Override
1314        public Object getItem(int position) {
1315            // We have nothing useful to return here.
1316            return position;
1317        }
1318
1319        @Override
1320        public long getItemId(int position) {
1321            return position;
1322        }
1323
1324        @Override
1325        public View getView(int position, View convertView, ViewGroup parent) {
1326            final RowViewHolder holder;
1327            if (convertView == null) {
1328                holder = createViewHolder(parent);
1329            } else {
1330                holder = (RowViewHolder) convertView.getTag();
1331            }
1332            bindViewHolder(position, holder);
1333
1334            return holder.row;
1335        }
1336
1337        RowViewHolder createViewHolder(ViewGroup parent) {
1338            final ViewGroup row = (ViewGroup) mLayoutInflater.inflate(R.layout.chooser_row,
1339                    parent, false);
1340            final RowViewHolder holder = new RowViewHolder(row, mColumnCount);
1341            final int spec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
1342
1343            for (int i = 0; i < mColumnCount; i++) {
1344                final View v = mChooserListAdapter.createView(row);
1345                final int column = i;
1346                v.setOnClickListener(new OnClickListener() {
1347                    @Override
1348                    public void onClick(View v) {
1349                        startSelected(holder.itemIndices[column], false, true);
1350                    }
1351                });
1352                v.setOnLongClickListener(new OnLongClickListener() {
1353                    @Override
1354                    public boolean onLongClick(View v) {
1355                        showTargetDetails(
1356                                mChooserListAdapter.resolveInfoForPosition(
1357                                        holder.itemIndices[column], true));
1358                        return true;
1359                    }
1360                });
1361                row.addView(v);
1362                holder.cells[i] = v;
1363
1364                // Force height to be a given so we don't have visual disruption during scaling.
1365                LayoutParams lp = v.getLayoutParams();
1366                v.measure(spec, spec);
1367                if (lp == null) {
1368                    lp = new LayoutParams(LayoutParams.MATCH_PARENT, v.getMeasuredHeight());
1369                    row.setLayoutParams(lp);
1370                } else {
1371                    lp.height = v.getMeasuredHeight();
1372                }
1373            }
1374
1375            // Pre-measure so we can scale later.
1376            holder.measure();
1377            LayoutParams lp = row.getLayoutParams();
1378            if (lp == null) {
1379                lp = new LayoutParams(LayoutParams.MATCH_PARENT, holder.measuredRowHeight);
1380                row.setLayoutParams(lp);
1381            } else {
1382                lp.height = holder.measuredRowHeight;
1383            }
1384            row.setTag(holder);
1385            return holder;
1386        }
1387
1388        void bindViewHolder(int rowPosition, RowViewHolder holder) {
1389            final int start = getFirstRowPosition(rowPosition);
1390            final int startType = mChooserListAdapter.getPositionTargetType(start);
1391
1392            int end = start + mColumnCount - 1;
1393            while (mChooserListAdapter.getPositionTargetType(end) != startType && end >= start) {
1394                end--;
1395            }
1396
1397            if (startType == ChooserListAdapter.TARGET_SERVICE) {
1398                holder.row.setBackgroundColor(
1399                        getColor(R.color.chooser_service_row_background_color));
1400            } else {
1401                holder.row.setBackgroundColor(Color.TRANSPARENT);
1402            }
1403
1404            final int oldHeight = holder.row.getLayoutParams().height;
1405            holder.row.getLayoutParams().height = Math.max(1,
1406                    (int) (holder.measuredRowHeight * getRowScale(rowPosition)));
1407            if (holder.row.getLayoutParams().height != oldHeight) {
1408                holder.row.requestLayout();
1409            }
1410
1411            for (int i = 0; i < mColumnCount; i++) {
1412                final View v = holder.cells[i];
1413                if (start + i <= end) {
1414                    v.setVisibility(View.VISIBLE);
1415                    holder.itemIndices[i] = start + i;
1416                    mChooserListAdapter.bindView(holder.itemIndices[i], v);
1417                } else {
1418                    v.setVisibility(View.GONE);
1419                }
1420            }
1421        }
1422
1423        int getFirstRowPosition(int row) {
1424            final int callerCount = mChooserListAdapter.getCallerTargetCount();
1425            final int callerRows = (int) Math.ceil((float) callerCount / mColumnCount);
1426
1427            if (row < callerRows) {
1428                return row * mColumnCount;
1429            }
1430
1431            final int serviceCount = mChooserListAdapter.getServiceTargetCount();
1432            final int serviceRows = (int) Math.ceil((float) serviceCount / mColumnCount);
1433
1434            if (row < callerRows + serviceRows) {
1435                return callerCount + (row - callerRows) * mColumnCount;
1436            }
1437
1438            return callerCount + serviceCount
1439                    + (row - callerRows - serviceRows) * mColumnCount;
1440        }
1441    }
1442
1443    static class RowViewHolder {
1444        final View[] cells;
1445        final ViewGroup row;
1446        int measuredRowHeight;
1447        int[] itemIndices;
1448
1449        public RowViewHolder(ViewGroup row, int cellCount) {
1450            this.row = row;
1451            this.cells = new View[cellCount];
1452            this.itemIndices = new int[cellCount];
1453        }
1454
1455        public void measure() {
1456            final int spec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
1457            row.measure(spec, spec);
1458            measuredRowHeight = row.getMeasuredHeight();
1459        }
1460    }
1461
1462    static class ChooserTargetServiceConnection implements ServiceConnection {
1463        private DisplayResolveInfo mOriginalTarget;
1464        private ComponentName mConnectedComponent;
1465        private ChooserActivity mChooserActivity;
1466        private final Object mLock = new Object();
1467
1468        private final IChooserTargetResult mChooserTargetResult = new IChooserTargetResult.Stub() {
1469            @Override
1470            public void sendResult(List<ChooserTarget> targets) throws RemoteException {
1471                synchronized (mLock) {
1472                    if (mChooserActivity == null) {
1473                        Log.e(TAG, "destroyed ChooserTargetServiceConnection received result from "
1474                                + mConnectedComponent + "; ignoring...");
1475                        return;
1476                    }
1477                    mChooserActivity.filterServiceTargets(
1478                            mOriginalTarget.getResolveInfo().activityInfo.packageName, targets);
1479                    final Message msg = Message.obtain();
1480                    msg.what = CHOOSER_TARGET_SERVICE_RESULT;
1481                    msg.obj = new ServiceResultInfo(mOriginalTarget, targets,
1482                            ChooserTargetServiceConnection.this);
1483                    mChooserActivity.mChooserHandler.sendMessage(msg);
1484                }
1485            }
1486        };
1487
1488        public ChooserTargetServiceConnection(ChooserActivity chooserActivity,
1489                DisplayResolveInfo dri) {
1490            mChooserActivity = chooserActivity;
1491            mOriginalTarget = dri;
1492        }
1493
1494        @Override
1495        public void onServiceConnected(ComponentName name, IBinder service) {
1496            if (DEBUG) Log.d(TAG, "onServiceConnected: " + name);
1497            synchronized (mLock) {
1498                if (mChooserActivity == null) {
1499                    Log.e(TAG, "destroyed ChooserTargetServiceConnection got onServiceConnected");
1500                    return;
1501                }
1502
1503                final IChooserTargetService icts = IChooserTargetService.Stub.asInterface(service);
1504                try {
1505                    icts.getChooserTargets(mOriginalTarget.getResolvedComponentName(),
1506                            mOriginalTarget.getResolveInfo().filter, mChooserTargetResult);
1507                } catch (RemoteException e) {
1508                    Log.e(TAG, "Querying ChooserTargetService " + name + " failed.", e);
1509                    mChooserActivity.unbindService(this);
1510                    destroy();
1511                    mChooserActivity.mServiceConnections.remove(this);
1512                }
1513            }
1514        }
1515
1516        @Override
1517        public void onServiceDisconnected(ComponentName name) {
1518            if (DEBUG) Log.d(TAG, "onServiceDisconnected: " + name);
1519            synchronized (mLock) {
1520                if (mChooserActivity == null) {
1521                    Log.e(TAG,
1522                            "destroyed ChooserTargetServiceConnection got onServiceDisconnected");
1523                    return;
1524                }
1525
1526                mChooserActivity.unbindService(this);
1527                destroy();
1528                mChooserActivity.mServiceConnections.remove(this);
1529                if (mChooserActivity.mServiceConnections.isEmpty()) {
1530                    mChooserActivity.mChooserHandler.removeMessages(
1531                            CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT);
1532                    mChooserActivity.sendVoiceChoicesIfNeeded();
1533                }
1534                mConnectedComponent = null;
1535            }
1536        }
1537
1538        public void destroy() {
1539            synchronized (mLock) {
1540                mChooserActivity = null;
1541                mOriginalTarget = null;
1542            }
1543        }
1544
1545        @Override
1546        public String toString() {
1547            return "ChooserTargetServiceConnection{service="
1548                    + mConnectedComponent + ", activity="
1549                    + (mOriginalTarget != null
1550                    ? mOriginalTarget.getResolveInfo().activityInfo.toString()
1551                    : "<connection destroyed>") + "}";
1552        }
1553    }
1554
1555    static class ServiceResultInfo {
1556        public final DisplayResolveInfo originalTarget;
1557        public final List<ChooserTarget> resultTargets;
1558        public final ChooserTargetServiceConnection connection;
1559
1560        public ServiceResultInfo(DisplayResolveInfo ot, List<ChooserTarget> rt,
1561                ChooserTargetServiceConnection c) {
1562            originalTarget = ot;
1563            resultTargets = rt;
1564            connection = c;
1565        }
1566    }
1567
1568    static class RefinementResultReceiver extends ResultReceiver {
1569        private ChooserActivity mChooserActivity;
1570        private TargetInfo mSelectedTarget;
1571
1572        public RefinementResultReceiver(ChooserActivity host, TargetInfo target,
1573                Handler handler) {
1574            super(handler);
1575            mChooserActivity = host;
1576            mSelectedTarget = target;
1577        }
1578
1579        @Override
1580        protected void onReceiveResult(int resultCode, Bundle resultData) {
1581            if (mChooserActivity == null) {
1582                Log.e(TAG, "Destroyed RefinementResultReceiver received a result");
1583                return;
1584            }
1585            if (resultData == null) {
1586                Log.e(TAG, "RefinementResultReceiver received null resultData");
1587                return;
1588            }
1589
1590            switch (resultCode) {
1591                case RESULT_CANCELED:
1592                    mChooserActivity.onRefinementCanceled();
1593                    break;
1594                case RESULT_OK:
1595                    Parcelable intentParcelable = resultData.getParcelable(Intent.EXTRA_INTENT);
1596                    if (intentParcelable instanceof Intent) {
1597                        mChooserActivity.onRefinementResult(mSelectedTarget,
1598                                (Intent) intentParcelable);
1599                    } else {
1600                        Log.e(TAG, "RefinementResultReceiver received RESULT_OK but no Intent"
1601                                + " in resultData with key Intent.EXTRA_INTENT");
1602                    }
1603                    break;
1604                default:
1605                    Log.w(TAG, "Unknown result code " + resultCode
1606                            + " sent to RefinementResultReceiver");
1607                    break;
1608            }
1609        }
1610
1611        public void destroy() {
1612            mChooserActivity = null;
1613            mSelectedTarget = null;
1614        }
1615    }
1616
1617    class OffsetDataSetObserver extends DataSetObserver {
1618        private final AbsListView mListView;
1619        private int mCachedViewType = -1;
1620        private View mCachedView;
1621
1622        public OffsetDataSetObserver(AbsListView listView) {
1623            mListView = listView;
1624        }
1625
1626        @Override
1627        public void onChanged() {
1628            if (mResolverDrawerLayout == null) {
1629                return;
1630            }
1631
1632            final int chooserTargetRows = mChooserRowAdapter.getServiceTargetRowCount();
1633            int offset = 0;
1634            for (int i = 0; i < chooserTargetRows; i++)  {
1635                final int pos = mChooserRowAdapter.getCallerTargetRowCount() + i;
1636                final int vt = mChooserRowAdapter.getItemViewType(pos);
1637                if (vt != mCachedViewType) {
1638                    mCachedView = null;
1639                }
1640                final View v = mChooserRowAdapter.getView(pos, mCachedView, mListView);
1641                int height = ((RowViewHolder) (v.getTag())).measuredRowHeight;
1642
1643                offset += (int) (height * mChooserRowAdapter.getRowScale(pos));
1644
1645                if (vt >= 0) {
1646                    mCachedViewType = vt;
1647                    mCachedView = v;
1648                } else {
1649                    mCachedViewType = -1;
1650                }
1651            }
1652
1653            mResolverDrawerLayout.setCollapsibleHeightReserved(offset);
1654        }
1655    }
1656}
1657