ChooserActivity.java revision 7317e8abcc1d691b77386b9ff5852360dc40cdd4 
1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.internal.app;
18
19import android.animation.ObjectAnimator;
20import android.annotation.NonNull;
21import android.app.Activity;
22import android.content.ComponentName;
23import android.content.Context;
24import android.content.Intent;
25import android.content.IntentSender;
26import android.content.IntentSender.SendIntentException;
27import android.content.ServiceConnection;
28import android.content.SharedPreferences;
29import android.content.pm.ActivityInfo;
30import android.content.pm.LabeledIntent;
31import android.content.pm.PackageManager;
32import android.content.pm.PackageManager.NameNotFoundException;
33import android.content.pm.ResolveInfo;
34import android.database.DataSetObserver;
35import android.graphics.Color;
36import android.graphics.drawable.Drawable;
37import android.graphics.drawable.Icon;
38import android.os.Bundle;
39import android.os.Environment;
40import android.os.Handler;
41import android.os.IBinder;
42import android.os.Message;
43import android.os.Parcelable;
44import android.os.Process;
45import android.os.RemoteException;
46import android.os.ResultReceiver;
47import android.os.UserHandle;
48import android.os.UserManager;
49import android.os.storage.StorageManager;
50import android.service.chooser.ChooserTarget;
51import android.service.chooser.ChooserTargetService;
52import android.service.chooser.IChooserTargetResult;
53import android.service.chooser.IChooserTargetService;
54import android.text.TextUtils;
55import android.util.FloatProperty;
56import android.util.Log;
57import android.util.Slog;
58import android.view.LayoutInflater;
59import android.view.View;
60import android.view.View.MeasureSpec;
61import android.view.View.OnClickListener;
62import android.view.View.OnLongClickListener;
63import android.view.ViewGroup;
64import android.view.ViewGroup.LayoutParams;
65import android.view.animation.AnimationUtils;
66import android.view.animation.Interpolator;
67import android.widget.AbsListView;
68import android.widget.BaseAdapter;
69import android.widget.ListView;
70import com.android.internal.R;
71import com.android.internal.app.ResolverActivity.TargetInfo;
72import com.android.internal.logging.MetricsLogger;
73import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
74import com.google.android.collect.Lists;
75
76import java.io.File;
77import java.util.ArrayList;
78import java.util.Collections;
79import java.util.Comparator;
80import java.util.List;
81
82public class ChooserActivity extends ResolverActivity {
83    private static final String TAG = "ChooserActivity";
84
85    private static final boolean DEBUG = false;
86
87    private static final int QUERY_TARGET_SERVICE_LIMIT = 5;
88    private static final int WATCHDOG_TIMEOUT_MILLIS = 5000;
89
90    private Bundle mReplacementExtras;
91    private IntentSender mChosenComponentSender;
92    private IntentSender mRefinementIntentSender;
93    private RefinementResultReceiver mRefinementResultReceiver;
94    private ChooserTarget[] mCallerChooserTargets;
95
96    private Intent mReferrerFillInIntent;
97
98    private ChooserListAdapter mChooserListAdapter;
99    private ChooserRowAdapter mChooserRowAdapter;
100
101    private SharedPreferences mPinnedSharedPrefs;
102    private static final float PINNED_TARGET_SCORE_BOOST = 1000.f;
103    private static final float CALLER_TARGET_SCORE_BOOST = 900.f;
104    private static final String PINNED_SHARED_PREFS_NAME = "chooser_pin_settings";
105    private static final String TARGET_DETAILS_FRAGMENT_TAG = "targetDetailsFragment";
106
107    private final List<ChooserTargetServiceConnection> mServiceConnections = new ArrayList<>();
108
109    private static final int CHOOSER_TARGET_SERVICE_RESULT = 1;
110    private static final int CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT = 2;
111
112    private final Handler mChooserHandler = new Handler() {
113        @Override
114        public void handleMessage(Message msg) {
115            switch (msg.what) {
116                case CHOOSER_TARGET_SERVICE_RESULT:
117                    if (DEBUG) Log.d(TAG, "CHOOSER_TARGET_SERVICE_RESULT");
118                    if (isDestroyed()) break;
119                    final ServiceResultInfo sri = (ServiceResultInfo) msg.obj;
120                    if (!mServiceConnections.contains(sri.connection)) {
121                        Log.w(TAG, "ChooserTargetServiceConnection " + sri.connection
122                                + " returned after being removed from active connections."
123                                + " Have you considered returning results faster?");
124                        break;
125                    }
126                    if (sri.resultTargets != null) {
127                        mChooserListAdapter.addServiceResults(sri.originalTarget,
128                                sri.resultTargets);
129                    }
130                    unbindService(sri.connection);
131                    sri.connection.destroy();
132                    mServiceConnections.remove(sri.connection);
133                    if (mServiceConnections.isEmpty()) {
134                        mChooserHandler.removeMessages(CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT);
135                        sendVoiceChoicesIfNeeded();
136                        mChooserListAdapter.setShowServiceTargets(true);
137                    }
138                    break;
139
140                case CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT:
141                    if (DEBUG) {
142                        Log.d(TAG, "CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT; unbinding services");
143                    }
144                    unbindRemainingServices();
145                    sendVoiceChoicesIfNeeded();
146                    mChooserListAdapter.setShowServiceTargets(true);
147                    break;
148
149                default:
150                    super.handleMessage(msg);
151            }
152        }
153    };
154
155    @Override
156    protected void onCreate(Bundle savedInstanceState) {
157        Intent intent = getIntent();
158        Parcelable targetParcelable = intent.getParcelableExtra(Intent.EXTRA_INTENT);
159        if (!(targetParcelable instanceof Intent)) {
160            Log.w("ChooserActivity", "Target is not an intent: " + targetParcelable);
161            finish();
162            super.onCreate(null);
163            return;
164        }
165        Intent target = (Intent) targetParcelable;
166        if (target != null) {
167            modifyTargetIntent(target);
168        }
169        Parcelable[] targetsParcelable
170                = intent.getParcelableArrayExtra(Intent.EXTRA_ALTERNATE_INTENTS);
171        if (targetsParcelable != null) {
172            final boolean offset = target == null;
173            Intent[] additionalTargets =
174                    new Intent[offset ? targetsParcelable.length - 1 : targetsParcelable.length];
175            for (int i = 0; i < targetsParcelable.length; i++) {
176                if (!(targetsParcelable[i] instanceof Intent)) {
177                    Log.w(TAG, "EXTRA_ALTERNATE_INTENTS array entry #" + i + " is not an Intent: "
178                            + targetsParcelable[i]);
179                    finish();
180                    super.onCreate(null);
181                    return;
182                }
183                final Intent additionalTarget = (Intent) targetsParcelable[i];
184                if (i == 0 && target == null) {
185                    target = additionalTarget;
186                    modifyTargetIntent(target);
187                } else {
188                    additionalTargets[offset ? i - 1 : i] = additionalTarget;
189                    modifyTargetIntent(additionalTarget);
190                }
191            }
192            setAdditionalTargets(additionalTargets);
193        }
194
195        mReplacementExtras = intent.getBundleExtra(Intent.EXTRA_REPLACEMENT_EXTRAS);
196        CharSequence title = intent.getCharSequenceExtra(Intent.EXTRA_TITLE);
197        int defaultTitleRes = 0;
198        if (title == null) {
199            defaultTitleRes = com.android.internal.R.string.chooseActivity;
200        }
201        Parcelable[] pa = intent.getParcelableArrayExtra(Intent.EXTRA_INITIAL_INTENTS);
202        Intent[] initialIntents = null;
203        if (pa != null) {
204            initialIntents = new Intent[pa.length];
205            for (int i=0; i<pa.length; i++) {
206                if (!(pa[i] instanceof Intent)) {
207                    Log.w(TAG, "Initial intent #" + i + " not an Intent: " + pa[i]);
208                    finish();
209                    super.onCreate(null);
210                    return;
211                }
212                final Intent in = (Intent) pa[i];
213                modifyTargetIntent(in);
214                initialIntents[i] = in;
215            }
216        }
217
218        mReferrerFillInIntent = new Intent().putExtra(Intent.EXTRA_REFERRER, getReferrer());
219
220        mChosenComponentSender = intent.getParcelableExtra(
221                Intent.EXTRA_CHOSEN_COMPONENT_INTENT_SENDER);
222        mRefinementIntentSender = intent.getParcelableExtra(
223                Intent.EXTRA_CHOOSER_REFINEMENT_INTENT_SENDER);
224        setSafeForwardingMode(true);
225
226        pa = intent.getParcelableArrayExtra(Intent.EXTRA_EXCLUDE_COMPONENTS);
227        if (pa != null) {
228            ComponentName[] names = new ComponentName[pa.length];
229            for (int i = 0; i < pa.length; i++) {
230                if (!(pa[i] instanceof ComponentName)) {
231                    Log.w(TAG, "Filtered component #" + i + " not a ComponentName: " + pa[i]);
232                    names = null;
233                    break;
234                }
235                names[i] = (ComponentName) pa[i];
236            }
237            setFilteredComponents(names);
238        }
239
240        pa = intent.getParcelableArrayExtra(Intent.EXTRA_CHOOSER_TARGETS);
241        if (pa != null) {
242            ChooserTarget[] targets = new ChooserTarget[pa.length];
243            for (int i = 0; i < pa.length; i++) {
244                if (!(pa[i] instanceof ChooserTarget)) {
245                    Log.w(TAG, "Chooser target #" + i + " not a ChooserTarget: " + pa[i]);
246                    targets = null;
247                    break;
248                }
249                targets[i] = (ChooserTarget) pa[i];
250            }
251            mCallerChooserTargets = targets;
252        }
253
254        mPinnedSharedPrefs = getPinnedSharedPrefs(this);
255        super.onCreate(savedInstanceState, target, title, defaultTitleRes, initialIntents,
256                null, false);
257
258        MetricsLogger.action(this, MetricsEvent.ACTION_ACTIVITY_CHOOSER_SHOWN);
259    }
260
261    static SharedPreferences getPinnedSharedPrefs(Context context) {
262        // The code below is because in the android:ui process, no one can hear you scream.
263        // The package info in the context isn't initialized in the way it is for normal apps,
264        // so the standard, name-based context.getSharedPreferences doesn't work. Instead, we
265        // build the path manually below using the same policy that appears in ContextImpl.
266        // This fails silently under the hood if there's a problem, so if we find ourselves in
267        // the case where we don't have access to credential encrypted storage we just won't
268        // have our pinned target info.
269        final File prefsFile = new File(new File(
270                Environment.getDataUserCePackageDirectory(StorageManager.UUID_PRIVATE_INTERNAL,
271                        context.getUserId(), context.getPackageName()),
272                "shared_prefs"),
273                PINNED_SHARED_PREFS_NAME + ".xml");
274        return context.getSharedPreferences(prefsFile, MODE_PRIVATE);
275    }
276
277    @Override
278    protected void onDestroy() {
279        super.onDestroy();
280        if (mRefinementResultReceiver != null) {
281            mRefinementResultReceiver.destroy();
282            mRefinementResultReceiver = null;
283        }
284        unbindRemainingServices();
285        mChooserHandler.removeMessages(CHOOSER_TARGET_SERVICE_RESULT);
286    }
287
288    @Override
289    public Intent getReplacementIntent(ActivityInfo aInfo, Intent defIntent) {
290        Intent result = defIntent;
291        if (mReplacementExtras != null) {
292            final Bundle replExtras = mReplacementExtras.getBundle(aInfo.packageName);
293            if (replExtras != null) {
294                result = new Intent(defIntent);
295                result.putExtras(replExtras);
296            }
297        }
298        if (aInfo.name.equals(IntentForwarderActivity.FORWARD_INTENT_TO_PARENT)
299                || aInfo.name.equals(IntentForwarderActivity.FORWARD_INTENT_TO_MANAGED_PROFILE)) {
300            result = Intent.createChooser(result,
301                    getIntent().getCharSequenceExtra(Intent.EXTRA_TITLE));
302
303            // Don't auto-launch single intents if the intent is being forwarded. This is done
304            // because automatically launching a resolving application as a response to the user
305            // action of switching accounts is pretty unexpected.
306            result.putExtra(Intent.EXTRA_AUTO_LAUNCH_SINGLE_CHOICE, false);
307        }
308        return result;
309    }
310
311    @Override
312    public void onActivityStarted(TargetInfo cti) {
313        if (mChosenComponentSender != null) {
314            final ComponentName target = cti.getResolvedComponentName();
315            if (target != null) {
316                final Intent fillIn = new Intent().putExtra(Intent.EXTRA_CHOSEN_COMPONENT, target);
317                try {
318                    mChosenComponentSender.sendIntent(this, Activity.RESULT_OK, fillIn, null, null);
319                } catch (IntentSender.SendIntentException e) {
320                    Slog.e(TAG, "Unable to launch supplied IntentSender to report "
321                            + "the chosen component: " + e);
322                }
323            }
324        }
325    }
326
327    @Override
328    public void onPrepareAdapterView(AbsListView adapterView, ResolveListAdapter adapter,
329            boolean alwaysUseOption) {
330        final ListView listView = adapterView instanceof ListView ? (ListView) adapterView : null;
331        mChooserListAdapter = (ChooserListAdapter) adapter;
332        if (mCallerChooserTargets != null && mCallerChooserTargets.length > 0) {
333            mChooserListAdapter.addServiceResults(null, Lists.newArrayList(mCallerChooserTargets));
334        }
335        mChooserRowAdapter = new ChooserRowAdapter(mChooserListAdapter);
336        mChooserRowAdapter.registerDataSetObserver(new OffsetDataSetObserver(adapterView));
337        adapterView.setAdapter(mChooserRowAdapter);
338        if (listView != null) {
339            listView.setItemsCanFocus(true);
340        }
341    }
342
343    @Override
344    public int getLayoutResource() {
345        return R.layout.chooser_grid;
346    }
347
348    @Override
349    public boolean shouldGetActivityMetadata() {
350        return true;
351    }
352
353    @Override
354    public boolean shouldAutoLaunchSingleChoice(TargetInfo target) {
355        return getIntent().getBooleanExtra(Intent.EXTRA_AUTO_LAUNCH_SINGLE_CHOICE,
356                super.shouldAutoLaunchSingleChoice(target));
357    }
358
359    @Override
360    public void showTargetDetails(ResolveInfo ri) {
361        ComponentName name = ri.activityInfo.getComponentName();
362        boolean pinned = mPinnedSharedPrefs.getBoolean(name.flattenToString(), false);
363        ResolverTargetActionsDialogFragment f =
364                new ResolverTargetActionsDialogFragment(ri.loadLabel(getPackageManager()),
365                        name, pinned);
366        f.show(getFragmentManager(), TARGET_DETAILS_FRAGMENT_TAG);
367    }
368
369    private void modifyTargetIntent(Intent in) {
370        final String action = in.getAction();
371        if (Intent.ACTION_SEND.equals(action) ||
372                Intent.ACTION_SEND_MULTIPLE.equals(action)) {
373            in.addFlags(Intent.FLAG_ACTIVITY_NEW_DOCUMENT |
374                    Intent.FLAG_ACTIVITY_MULTIPLE_TASK);
375        }
376    }
377
378    @Override
379    protected boolean onTargetSelected(TargetInfo target, boolean alwaysCheck) {
380        if (mRefinementIntentSender != null) {
381            final Intent fillIn = new Intent();
382            final List<Intent> sourceIntents = target.getAllSourceIntents();
383            if (!sourceIntents.isEmpty()) {
384                fillIn.putExtra(Intent.EXTRA_INTENT, sourceIntents.get(0));
385                if (sourceIntents.size() > 1) {
386                    final Intent[] alts = new Intent[sourceIntents.size() - 1];
387                    for (int i = 1, N = sourceIntents.size(); i < N; i++) {
388                        alts[i - 1] = sourceIntents.get(i);
389                    }
390                    fillIn.putExtra(Intent.EXTRA_ALTERNATE_INTENTS, alts);
391                }
392                if (mRefinementResultReceiver != null) {
393                    mRefinementResultReceiver.destroy();
394                }
395                mRefinementResultReceiver = new RefinementResultReceiver(this, target, null);
396                fillIn.putExtra(Intent.EXTRA_RESULT_RECEIVER,
397                        mRefinementResultReceiver);
398                try {
399                    mRefinementIntentSender.sendIntent(this, 0, fillIn, null, null);
400                    return false;
401                } catch (SendIntentException e) {
402                    Log.e(TAG, "Refinement IntentSender failed to send", e);
403                }
404            }
405        }
406        return super.onTargetSelected(target, alwaysCheck);
407    }
408
409    @Override
410    public void startSelected(int which, boolean always, boolean filtered) {
411        super.startSelected(which, always, filtered);
412
413        if (mChooserListAdapter != null) {
414            // Log the index of which type of target the user picked.
415            // Lower values mean the ranking was better.
416            int cat = 0;
417            int value = which;
418            switch (mChooserListAdapter.getPositionTargetType(which)) {
419                case ChooserListAdapter.TARGET_CALLER:
420                    cat = MetricsEvent.ACTION_ACTIVITY_CHOOSER_PICKED_APP_TARGET;
421                    break;
422                case ChooserListAdapter.TARGET_SERVICE:
423                    cat = MetricsEvent.ACTION_ACTIVITY_CHOOSER_PICKED_SERVICE_TARGET;
424                    value -= mChooserListAdapter.getCallerTargetCount();
425                    break;
426                case ChooserListAdapter.TARGET_STANDARD:
427                    cat = MetricsEvent.ACTION_ACTIVITY_CHOOSER_PICKED_STANDARD_TARGET;
428                    value -= mChooserListAdapter.getCallerTargetCount()
429                            + mChooserListAdapter.getServiceTargetCount();
430                    break;
431            }
432
433            if (cat != 0) {
434                MetricsLogger.action(this, cat, value);
435            }
436        }
437    }
438
439    void queryTargetServices(ChooserListAdapter adapter) {
440        final PackageManager pm = getPackageManager();
441        int targetsToQuery = 0;
442        for (int i = 0, N = adapter.getDisplayResolveInfoCount(); i < N; i++) {
443            final DisplayResolveInfo dri = adapter.getDisplayResolveInfo(i);
444            if (adapter.getScore(dri) == 0) {
445                // A score of 0 means the app hasn't been used in some time;
446                // don't query it as it's not likely to be relevant.
447                continue;
448            }
449            final ActivityInfo ai = dri.getResolveInfo().activityInfo;
450            final Bundle md = ai.metaData;
451            final String serviceName = md != null ? convertServiceName(ai.packageName,
452                    md.getString(ChooserTargetService.META_DATA_NAME)) : null;
453            if (serviceName != null) {
454                final ComponentName serviceComponent = new ComponentName(
455                        ai.packageName, serviceName);
456                final Intent serviceIntent = new Intent(ChooserTargetService.SERVICE_INTERFACE)
457                        .setComponent(serviceComponent);
458
459                if (DEBUG) {
460                    Log.d(TAG, "queryTargets found target with service " + serviceComponent);
461                }
462
463                try {
464                    final String perm = pm.getServiceInfo(serviceComponent, 0).permission;
465                    if (!ChooserTargetService.BIND_PERMISSION.equals(perm)) {
466                        Log.w(TAG, "ChooserTargetService " + serviceComponent + " does not require"
467                                + " permission " + ChooserTargetService.BIND_PERMISSION
468                                + " - this service will not be queried for ChooserTargets."
469                                + " add android:permission=\""
470                                + ChooserTargetService.BIND_PERMISSION + "\""
471                                + " to the <service> tag for " + serviceComponent
472                                + " in the manifest.");
473                        continue;
474                    }
475                } catch (NameNotFoundException e) {
476                    Log.e(TAG, "Could not look up service " + serviceComponent
477                            + "; component name not found");
478                    continue;
479                }
480
481                final ChooserTargetServiceConnection conn =
482                        new ChooserTargetServiceConnection(this, dri);
483
484                // Explicitly specify Process.myUserHandle instead of calling bindService
485                // to avoid the warning from calling from the system process without an explicit
486                // user handle
487                if (bindServiceAsUser(serviceIntent, conn, BIND_AUTO_CREATE | BIND_NOT_FOREGROUND,
488                        Process.myUserHandle())) {
489                    if (DEBUG) {
490                        Log.d(TAG, "Binding service connection for target " + dri
491                                + " intent " + serviceIntent);
492                    }
493                    mServiceConnections.add(conn);
494                    targetsToQuery++;
495                }
496            }
497            if (targetsToQuery >= QUERY_TARGET_SERVICE_LIMIT) {
498                if (DEBUG) Log.d(TAG, "queryTargets hit query target limit "
499                        + QUERY_TARGET_SERVICE_LIMIT);
500                break;
501            }
502        }
503
504        if (!mServiceConnections.isEmpty()) {
505            if (DEBUG) Log.d(TAG, "queryTargets setting watchdog timer for "
506                    + WATCHDOG_TIMEOUT_MILLIS + "ms");
507            mChooserHandler.sendEmptyMessageDelayed(CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT,
508                    WATCHDOG_TIMEOUT_MILLIS);
509        } else {
510            sendVoiceChoicesIfNeeded();
511        }
512    }
513
514    private String convertServiceName(String packageName, String serviceName) {
515        if (TextUtils.isEmpty(serviceName)) {
516            return null;
517        }
518
519        final String fullName;
520        if (serviceName.startsWith(".")) {
521            // Relative to the app package. Prepend the app package name.
522            fullName = packageName + serviceName;
523        } else if (serviceName.indexOf('.') >= 0) {
524            // Fully qualified package name.
525            fullName = serviceName;
526        } else {
527            fullName = null;
528        }
529        return fullName;
530    }
531
532    void unbindRemainingServices() {
533        if (DEBUG) {
534            Log.d(TAG, "unbindRemainingServices, " + mServiceConnections.size() + " left");
535        }
536        for (int i = 0, N = mServiceConnections.size(); i < N; i++) {
537            final ChooserTargetServiceConnection conn = mServiceConnections.get(i);
538            if (DEBUG) Log.d(TAG, "unbinding " + conn);
539            unbindService(conn);
540            conn.destroy();
541        }
542        mServiceConnections.clear();
543        mChooserHandler.removeMessages(CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT);
544    }
545
546    public void onSetupVoiceInteraction() {
547        // Do nothing. We'll send the voice stuff ourselves.
548    }
549
550    void onRefinementResult(TargetInfo selectedTarget, Intent matchingIntent) {
551        if (mRefinementResultReceiver != null) {
552            mRefinementResultReceiver.destroy();
553            mRefinementResultReceiver = null;
554        }
555
556        if (selectedTarget == null) {
557            Log.e(TAG, "Refinement result intent did not match any known targets; canceling");
558        } else if (!checkTargetSourceIntent(selectedTarget, matchingIntent)) {
559            Log.e(TAG, "onRefinementResult: Selected target " + selectedTarget
560                    + " cannot match refined source intent " + matchingIntent);
561        } else if (super.onTargetSelected(selectedTarget.cloneFilledIn(matchingIntent, 0), false)) {
562            finish();
563            return;
564        }
565        onRefinementCanceled();
566    }
567
568    void onRefinementCanceled() {
569        if (mRefinementResultReceiver != null) {
570            mRefinementResultReceiver.destroy();
571            mRefinementResultReceiver = null;
572        }
573        finish();
574    }
575
576    boolean checkTargetSourceIntent(TargetInfo target, Intent matchingIntent) {
577        final List<Intent> targetIntents = target.getAllSourceIntents();
578        for (int i = 0, N = targetIntents.size(); i < N; i++) {
579            final Intent targetIntent = targetIntents.get(i);
580            if (targetIntent.filterEquals(matchingIntent)) {
581                return true;
582            }
583        }
584        return false;
585    }
586
587    void filterServiceTargets(String packageName, List<ChooserTarget> targets) {
588        if (targets == null) {
589            return;
590        }
591
592        final PackageManager pm = getPackageManager();
593        for (int i = targets.size() - 1; i >= 0; i--) {
594            final ChooserTarget target = targets.get(i);
595            final ComponentName targetName = target.getComponentName();
596            if (packageName != null && packageName.equals(targetName.getPackageName())) {
597                // Anything from the original target's package is fine.
598                continue;
599            }
600
601            boolean remove;
602            try {
603                final ActivityInfo ai = pm.getActivityInfo(targetName, 0);
604                remove = !ai.exported || ai.permission != null;
605            } catch (NameNotFoundException e) {
606                Log.e(TAG, "Target " + target + " returned by " + packageName
607                        + " component not found");
608                remove = true;
609            }
610
611            if (remove) {
612                targets.remove(i);
613            }
614        }
615    }
616
617    @Override
618    public ResolveListAdapter createAdapter(Context context, List<Intent> payloadIntents,
619            Intent[] initialIntents, List<ResolveInfo> rList, int launchedFromUid,
620            boolean filterLastUsed) {
621        final ChooserListAdapter adapter = new ChooserListAdapter(context, payloadIntents,
622                initialIntents, rList, launchedFromUid, filterLastUsed);
623        if (DEBUG) Log.d(TAG, "Adapter created; querying services");
624        queryTargetServices(adapter);
625        return adapter;
626    }
627
628    final class ChooserTargetInfo implements TargetInfo {
629        private final DisplayResolveInfo mSourceInfo;
630        private final ResolveInfo mBackupResolveInfo;
631        private final ChooserTarget mChooserTarget;
632        private Drawable mBadgeIcon = null;
633        private CharSequence mBadgeContentDescription;
634        private Drawable mDisplayIcon;
635        private final Intent mFillInIntent;
636        private final int mFillInFlags;
637        private final float mModifiedScore;
638
639        public ChooserTargetInfo(DisplayResolveInfo sourceInfo, ChooserTarget chooserTarget,
640                float modifiedScore) {
641            mSourceInfo = sourceInfo;
642            mChooserTarget = chooserTarget;
643            mModifiedScore = modifiedScore;
644            if (sourceInfo != null) {
645                final ResolveInfo ri = sourceInfo.getResolveInfo();
646                if (ri != null) {
647                    final ActivityInfo ai = ri.activityInfo;
648                    if (ai != null && ai.applicationInfo != null) {
649                        final PackageManager pm = getPackageManager();
650                        mBadgeIcon = pm.getApplicationIcon(ai.applicationInfo);
651                        mBadgeContentDescription = pm.getApplicationLabel(ai.applicationInfo);
652                    }
653                }
654            }
655            final Icon icon = chooserTarget.getIcon();
656            // TODO do this in the background
657            mDisplayIcon = icon != null ? icon.loadDrawable(ChooserActivity.this) : null;
658
659            if (sourceInfo != null) {
660                mBackupResolveInfo = null;
661            } else {
662                mBackupResolveInfo = getPackageManager().resolveActivity(getResolvedIntent(), 0);
663            }
664
665            mFillInIntent = null;
666            mFillInFlags = 0;
667        }
668
669        private ChooserTargetInfo(ChooserTargetInfo other, Intent fillInIntent, int flags) {
670            mSourceInfo = other.mSourceInfo;
671            mBackupResolveInfo = other.mBackupResolveInfo;
672            mChooserTarget = other.mChooserTarget;
673            mBadgeIcon = other.mBadgeIcon;
674            mBadgeContentDescription = other.mBadgeContentDescription;
675            mDisplayIcon = other.mDisplayIcon;
676            mFillInIntent = fillInIntent;
677            mFillInFlags = flags;
678            mModifiedScore = other.mModifiedScore;
679        }
680
681        public float getModifiedScore() {
682            return mModifiedScore;
683        }
684
685        @Override
686        public Intent getResolvedIntent() {
687            if (mSourceInfo != null) {
688                return mSourceInfo.getResolvedIntent();
689            }
690
691            final Intent targetIntent = new Intent(getTargetIntent());
692            targetIntent.setComponent(mChooserTarget.getComponentName());
693            targetIntent.putExtras(mChooserTarget.getIntentExtras());
694            return targetIntent;
695        }
696
697        @Override
698        public ComponentName getResolvedComponentName() {
699            if (mSourceInfo != null) {
700                return mSourceInfo.getResolvedComponentName();
701            } else if (mBackupResolveInfo != null) {
702                return new ComponentName(mBackupResolveInfo.activityInfo.packageName,
703                        mBackupResolveInfo.activityInfo.name);
704            }
705            return null;
706        }
707
708        private Intent getBaseIntentToSend() {
709            Intent result = getResolvedIntent();
710            if (result == null) {
711                Log.e(TAG, "ChooserTargetInfo: no base intent available to send");
712            } else {
713                result = new Intent(result);
714                if (mFillInIntent != null) {
715                    result.fillIn(mFillInIntent, mFillInFlags);
716                }
717                result.fillIn(mReferrerFillInIntent, 0);
718            }
719            return result;
720        }
721
722        @Override
723        public boolean start(Activity activity, Bundle options) {
724            throw new RuntimeException("ChooserTargets should be started as caller.");
725        }
726
727        @Override
728        public boolean startAsCaller(Activity activity, Bundle options, int userId) {
729            final Intent intent = getBaseIntentToSend();
730            if (intent == null) {
731                return false;
732            }
733            intent.setComponent(mChooserTarget.getComponentName());
734            intent.putExtras(mChooserTarget.getIntentExtras());
735
736            // Important: we will ignore the target security checks in ActivityManager
737            // if and only if the ChooserTarget's target package is the same package
738            // where we got the ChooserTargetService that provided it. This lets a
739            // ChooserTargetService provide a non-exported or permission-guarded target
740            // to the chooser for the user to pick.
741            //
742            // If mSourceInfo is null, we got this ChooserTarget from the caller or elsewhere
743            // so we'll obey the caller's normal security checks.
744            final boolean ignoreTargetSecurity = mSourceInfo != null
745                    && mSourceInfo.getResolvedComponentName().getPackageName()
746                    .equals(mChooserTarget.getComponentName().getPackageName());
747            activity.startActivityAsCaller(intent, options, ignoreTargetSecurity, userId);
748            return true;
749        }
750
751        @Override
752        public boolean startAsUser(Activity activity, Bundle options, UserHandle user) {
753            throw new RuntimeException("ChooserTargets should be started as caller.");
754        }
755
756        @Override
757        public ResolveInfo getResolveInfo() {
758            return mSourceInfo != null ? mSourceInfo.getResolveInfo() : mBackupResolveInfo;
759        }
760
761        @Override
762        public CharSequence getDisplayLabel() {
763            return mChooserTarget.getTitle();
764        }
765
766        @Override
767        public CharSequence getExtendedInfo() {
768            // ChooserTargets have badge icons, so we won't show the extended info to disambiguate.
769            return null;
770        }
771
772        @Override
773        public Drawable getDisplayIcon() {
774            return mDisplayIcon;
775        }
776
777        @Override
778        public Drawable getBadgeIcon() {
779            return mBadgeIcon;
780        }
781
782        @Override
783        public CharSequence getBadgeContentDescription() {
784            return mBadgeContentDescription;
785        }
786
787        @Override
788        public TargetInfo cloneFilledIn(Intent fillInIntent, int flags) {
789            return new ChooserTargetInfo(this, fillInIntent, flags);
790        }
791
792        @Override
793        public List<Intent> getAllSourceIntents() {
794            final List<Intent> results = new ArrayList<>();
795            if (mSourceInfo != null) {
796                // We only queried the service for the first one in our sourceinfo.
797                results.add(mSourceInfo.getAllSourceIntents().get(0));
798            }
799            return results;
800        }
801
802        @Override
803        public boolean isPinned() {
804            return mSourceInfo != null ? mSourceInfo.isPinned() : false;
805        }
806    }
807
808    public class ChooserListAdapter extends ResolveListAdapter {
809        public static final int TARGET_BAD = -1;
810        public static final int TARGET_CALLER = 0;
811        public static final int TARGET_SERVICE = 1;
812        public static final int TARGET_STANDARD = 2;
813
814        private static final int MAX_SERVICE_TARGETS = 8;
815        private static final int MAX_TARGETS_PER_SERVICE = 4;
816
817        private final List<ChooserTargetInfo> mServiceTargets = new ArrayList<>();
818        private final List<TargetInfo> mCallerTargets = new ArrayList<>();
819        private boolean mShowServiceTargets;
820
821        private float mLateFee = 1.f;
822
823        private final BaseChooserTargetComparator mBaseTargetComparator
824                = new BaseChooserTargetComparator();
825
826        public ChooserListAdapter(Context context, List<Intent> payloadIntents,
827                Intent[] initialIntents, List<ResolveInfo> rList, int launchedFromUid,
828                boolean filterLastUsed) {
829            // Don't send the initial intents through the shared ResolverActivity path,
830            // we want to separate them into a different section.
831            super(context, payloadIntents, null, rList, launchedFromUid, filterLastUsed);
832
833            if (initialIntents != null) {
834                final PackageManager pm = getPackageManager();
835                for (int i = 0; i < initialIntents.length; i++) {
836                    final Intent ii = initialIntents[i];
837                    if (ii == null) {
838                        continue;
839                    }
840
841                    // We reimplement Intent#resolveActivityInfo here because if we have an
842                    // implicit intent, we want the ResolveInfo returned by PackageManager
843                    // instead of one we reconstruct ourselves. The ResolveInfo returned might
844                    // have extra metadata and resolvePackageName set and we want to respect that.
845                    ResolveInfo ri = null;
846                    ActivityInfo ai = null;
847                    final ComponentName cn = ii.getComponent();
848                    if (cn != null) {
849                        try {
850                            ai = pm.getActivityInfo(ii.getComponent(), 0);
851                            ri = new ResolveInfo();
852                            ri.activityInfo = ai;
853                        } catch (PackageManager.NameNotFoundException ignored) {
854                            // ai will == null below
855                        }
856                    }
857                    if (ai == null) {
858                        ri = pm.resolveActivity(ii, PackageManager.MATCH_DEFAULT_ONLY);
859                        ai = ri != null ? ri.activityInfo : null;
860                    }
861                    if (ai == null) {
862                        Log.w(TAG, "No activity found for " + ii);
863                        continue;
864                    }
865                    UserManager userManager =
866                            (UserManager) getSystemService(Context.USER_SERVICE);
867                    if (ii instanceof LabeledIntent) {
868                        LabeledIntent li = (LabeledIntent)ii;
869                        ri.resolvePackageName = li.getSourcePackage();
870                        ri.labelRes = li.getLabelResource();
871                        ri.nonLocalizedLabel = li.getNonLocalizedLabel();
872                        ri.icon = li.getIconResource();
873                        ri.iconResourceId = ri.icon;
874                    }
875                    if (userManager.isManagedProfile()) {
876                        ri.noResourceId = true;
877                        ri.icon = 0;
878                    }
879                    mCallerTargets.add(new DisplayResolveInfo(ii, ri,
880                            ri.loadLabel(pm), null, ii));
881                }
882            }
883        }
884
885        @Override
886        public boolean showsExtendedInfo(TargetInfo info) {
887            // We have badges so we don't need this text shown.
888            return false;
889        }
890
891        @Override
892        public boolean isComponentPinned(ComponentName name) {
893            return mPinnedSharedPrefs.getBoolean(name.flattenToString(), false);
894        }
895
896        @Override
897        public float getScore(DisplayResolveInfo target) {
898            if (target == null) {
899                return CALLER_TARGET_SCORE_BOOST;
900            }
901            float score = super.getScore(target);
902            if (target.isPinned()) {
903                score += PINNED_TARGET_SCORE_BOOST;
904            }
905            return score;
906        }
907
908        @Override
909        public View onCreateView(ViewGroup parent) {
910            return mInflater.inflate(
911                    com.android.internal.R.layout.resolve_grid_item, parent, false);
912        }
913
914        @Override
915        public void onListRebuilt() {
916            if (mServiceTargets != null) {
917                pruneServiceTargets();
918            }
919        }
920
921        @Override
922        public boolean shouldGetResolvedFilter() {
923            return true;
924        }
925
926        @Override
927        public int getCount() {
928            return super.getCount() + getServiceTargetCount() + getCallerTargetCount();
929        }
930
931        @Override
932        public int getUnfilteredCount() {
933            return super.getUnfilteredCount() + getServiceTargetCount() + getCallerTargetCount();
934        }
935
936        public int getCallerTargetCount() {
937            return mCallerTargets.size();
938        }
939
940        public int getServiceTargetCount() {
941            if (!mShowServiceTargets) {
942                return 0;
943            }
944            return Math.min(mServiceTargets.size(), MAX_SERVICE_TARGETS);
945        }
946
947        public int getStandardTargetCount() {
948            return super.getCount();
949        }
950
951        public int getPositionTargetType(int position) {
952            int offset = 0;
953
954            final int callerTargetCount = getCallerTargetCount();
955            if (position < callerTargetCount) {
956                return TARGET_CALLER;
957            }
958            offset += callerTargetCount;
959
960            final int serviceTargetCount = getServiceTargetCount();
961            if (position - offset < serviceTargetCount) {
962                return TARGET_SERVICE;
963            }
964            offset += serviceTargetCount;
965
966            final int standardTargetCount = super.getCount();
967            if (position - offset < standardTargetCount) {
968                return TARGET_STANDARD;
969            }
970
971            return TARGET_BAD;
972        }
973
974        @Override
975        public TargetInfo getItem(int position) {
976            return targetInfoForPosition(position, true);
977        }
978
979        @Override
980        public TargetInfo targetInfoForPosition(int position, boolean filtered) {
981            int offset = 0;
982
983            final int callerTargetCount = getCallerTargetCount();
984            if (position < callerTargetCount) {
985                return mCallerTargets.get(position);
986            }
987            offset += callerTargetCount;
988
989            final int serviceTargetCount = getServiceTargetCount();
990            if (position - offset < serviceTargetCount) {
991                return mServiceTargets.get(position - offset);
992            }
993            offset += serviceTargetCount;
994
995            return filtered ? super.getItem(position - offset)
996                    : getDisplayInfoAt(position - offset);
997        }
998
999        public void addServiceResults(DisplayResolveInfo origTarget, List<ChooserTarget> targets) {
1000            if (DEBUG) Log.d(TAG, "addServiceResults " + origTarget + ", " + targets.size()
1001                    + " targets");
1002            final float parentScore = getScore(origTarget);
1003            Collections.sort(targets, mBaseTargetComparator);
1004            float lastScore = 0;
1005            for (int i = 0, N = Math.min(targets.size(), MAX_TARGETS_PER_SERVICE); i < N; i++) {
1006                final ChooserTarget target = targets.get(i);
1007                float targetScore = target.getScore();
1008                targetScore *= parentScore;
1009                targetScore *= mLateFee;
1010                if (i > 0 && targetScore >= lastScore) {
1011                    // Apply a decay so that the top app can't crowd out everything else.
1012                    // This incents ChooserTargetServices to define what's truly better.
1013                    targetScore = lastScore * 0.95f;
1014                }
1015                insertServiceTarget(new ChooserTargetInfo(origTarget, target, targetScore));
1016
1017                if (DEBUG) {
1018                    Log.d(TAG, " => " + target.toString() + " score=" + targetScore
1019                            + " base=" + target.getScore()
1020                            + " lastScore=" + lastScore
1021                            + " parentScore=" + parentScore
1022                            + " lateFee=" + mLateFee);
1023                }
1024
1025                lastScore = targetScore;
1026            }
1027
1028            mLateFee *= 0.95f;
1029
1030            notifyDataSetChanged();
1031        }
1032
1033        /**
1034         * Set to true to reveal all service targets at once.
1035         */
1036        public void setShowServiceTargets(boolean show) {
1037            mShowServiceTargets = show;
1038            notifyDataSetChanged();
1039        }
1040
1041        private void insertServiceTarget(ChooserTargetInfo chooserTargetInfo) {
1042            final float newScore = chooserTargetInfo.getModifiedScore();
1043            for (int i = 0, N = mServiceTargets.size(); i < N; i++) {
1044                final ChooserTargetInfo serviceTarget = mServiceTargets.get(i);
1045                if (newScore > serviceTarget.getModifiedScore()) {
1046                    mServiceTargets.add(i, chooserTargetInfo);
1047                    return;
1048                }
1049            }
1050            mServiceTargets.add(chooserTargetInfo);
1051        }
1052
1053        private void pruneServiceTargets() {
1054            if (DEBUG) Log.d(TAG, "pruneServiceTargets");
1055            for (int i = mServiceTargets.size() - 1; i >= 0; i--) {
1056                final ChooserTargetInfo cti = mServiceTargets.get(i);
1057                if (!hasResolvedTarget(cti.getResolveInfo())) {
1058                    if (DEBUG) Log.d(TAG, " => " + i + " " + cti);
1059                    mServiceTargets.remove(i);
1060                }
1061            }
1062        }
1063    }
1064
1065    static class BaseChooserTargetComparator implements Comparator<ChooserTarget> {
1066        @Override
1067        public int compare(ChooserTarget lhs, ChooserTarget rhs) {
1068            // Descending order
1069            return (int) Math.signum(rhs.getScore() - lhs.getScore());
1070        }
1071    }
1072
1073    static class RowScale {
1074        private static final int DURATION = 400;
1075
1076        float mScale;
1077        ChooserRowAdapter mAdapter;
1078        private final ObjectAnimator mAnimator;
1079
1080        public static final FloatProperty<RowScale> PROPERTY =
1081                new FloatProperty<RowScale>("scale") {
1082            @Override
1083            public void setValue(RowScale object, float value) {
1084                object.mScale = value;
1085                object.mAdapter.notifyDataSetChanged();
1086            }
1087
1088            @Override
1089            public Float get(RowScale object) {
1090                return object.mScale;
1091            }
1092        };
1093
1094        public RowScale(@NonNull ChooserRowAdapter adapter, float from, float to) {
1095            mAdapter = adapter;
1096            mScale = from;
1097            if (from == to) {
1098                mAnimator = null;
1099                return;
1100            }
1101
1102            mAnimator = ObjectAnimator.ofFloat(this, PROPERTY, from, to).setDuration(DURATION);
1103        }
1104
1105        public RowScale setInterpolator(Interpolator interpolator) {
1106            if (mAnimator != null) {
1107                mAnimator.setInterpolator(interpolator);
1108            }
1109            return this;
1110        }
1111
1112        public float get() {
1113            return mScale;
1114        }
1115
1116        public void startAnimation() {
1117            if (mAnimator != null) {
1118                mAnimator.start();
1119            }
1120        }
1121
1122        public void cancelAnimation() {
1123            if (mAnimator != null) {
1124                mAnimator.cancel();
1125            }
1126        }
1127    }
1128
1129    class ChooserRowAdapter extends BaseAdapter {
1130        private ChooserListAdapter mChooserListAdapter;
1131        private final LayoutInflater mLayoutInflater;
1132        private final int mColumnCount = 4;
1133        private RowScale[] mServiceTargetScale;
1134        private final Interpolator mInterpolator;
1135
1136        public ChooserRowAdapter(ChooserListAdapter wrappedAdapter) {
1137            mChooserListAdapter = wrappedAdapter;
1138            mLayoutInflater = LayoutInflater.from(ChooserActivity.this);
1139
1140            mInterpolator = AnimationUtils.loadInterpolator(ChooserActivity.this,
1141                    android.R.interpolator.decelerate_quint);
1142
1143            wrappedAdapter.registerDataSetObserver(new DataSetObserver() {
1144                @Override
1145                public void onChanged() {
1146                    super.onChanged();
1147                    final int rcount = getServiceTargetRowCount();
1148                    if (mServiceTargetScale == null
1149                            || mServiceTargetScale.length != rcount) {
1150                        RowScale[] old = mServiceTargetScale;
1151                        int oldRCount = old != null ? old.length : 0;
1152                        mServiceTargetScale = new RowScale[rcount];
1153                        if (old != null && rcount > 0) {
1154                            System.arraycopy(old, 0, mServiceTargetScale, 0,
1155                                    Math.min(old.length, rcount));
1156                        }
1157
1158                        for (int i = rcount; i < oldRCount; i++) {
1159                            old[i].cancelAnimation();
1160                        }
1161
1162                        for (int i = oldRCount; i < rcount; i++) {
1163                            final RowScale rs = new RowScale(ChooserRowAdapter.this, 0.f, 1.f)
1164                                    .setInterpolator(mInterpolator);
1165                            mServiceTargetScale[i] = rs;
1166                        }
1167
1168                        // Start the animations in a separate loop.
1169                        // The process of starting animations will result in
1170                        // binding views to set up initial values, and we must
1171                        // have ALL of the new RowScale objects created above before
1172                        // we get started.
1173                        for (int i = oldRCount; i < rcount; i++) {
1174                            mServiceTargetScale[i].startAnimation();
1175                        }
1176                    }
1177
1178                    notifyDataSetChanged();
1179                }
1180
1181                @Override
1182                public void onInvalidated() {
1183                    super.onInvalidated();
1184                    notifyDataSetInvalidated();
1185                    if (mServiceTargetScale != null) {
1186                        for (RowScale rs : mServiceTargetScale) {
1187                            rs.cancelAnimation();
1188                        }
1189                    }
1190                }
1191            });
1192        }
1193
1194        private float getRowScale(int rowPosition) {
1195            final int start = getCallerTargetRowCount();
1196            final int end = start + getServiceTargetRowCount();
1197            if (rowPosition >= start && rowPosition < end) {
1198                return mServiceTargetScale[rowPosition - start].get();
1199            }
1200            return 1.f;
1201        }
1202
1203        @Override
1204        public int getCount() {
1205            return (int) (
1206                    getCallerTargetRowCount()
1207                    + getServiceTargetRowCount()
1208                    + Math.ceil((float) mChooserListAdapter.getStandardTargetCount() / mColumnCount)
1209            );
1210        }
1211
1212        public int getCallerTargetRowCount() {
1213            return (int) Math.ceil(
1214                    (float) mChooserListAdapter.getCallerTargetCount() / mColumnCount);
1215        }
1216
1217        public int getServiceTargetRowCount() {
1218            return (int) Math.ceil(
1219                    (float) mChooserListAdapter.getServiceTargetCount() / mColumnCount);
1220        }
1221
1222        @Override
1223        public Object getItem(int position) {
1224            // We have nothing useful to return here.
1225            return position;
1226        }
1227
1228        @Override
1229        public long getItemId(int position) {
1230            return position;
1231        }
1232
1233        @Override
1234        public View getView(int position, View convertView, ViewGroup parent) {
1235            final RowViewHolder holder;
1236            if (convertView == null) {
1237                holder = createViewHolder(parent);
1238            } else {
1239                holder = (RowViewHolder) convertView.getTag();
1240            }
1241            bindViewHolder(position, holder);
1242
1243            return holder.row;
1244        }
1245
1246        RowViewHolder createViewHolder(ViewGroup parent) {
1247            final ViewGroup row = (ViewGroup) mLayoutInflater.inflate(R.layout.chooser_row,
1248                    parent, false);
1249            final RowViewHolder holder = new RowViewHolder(row, mColumnCount);
1250            final int spec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
1251
1252            for (int i = 0; i < mColumnCount; i++) {
1253                final View v = mChooserListAdapter.createView(row);
1254                final int column = i;
1255                v.setOnClickListener(new OnClickListener() {
1256                    @Override
1257                    public void onClick(View v) {
1258                        startSelected(holder.itemIndices[column], false, true);
1259                    }
1260                });
1261                v.setOnLongClickListener(new OnLongClickListener() {
1262                    @Override
1263                    public boolean onLongClick(View v) {
1264                        showTargetDetails(
1265                                mChooserListAdapter.resolveInfoForPosition(
1266                                        holder.itemIndices[column], true));
1267                        return true;
1268                    }
1269                });
1270                row.addView(v);
1271                holder.cells[i] = v;
1272
1273                // Force height to be a given so we don't have visual disruption during scaling.
1274                LayoutParams lp = v.getLayoutParams();
1275                v.measure(spec, spec);
1276                if (lp == null) {
1277                    lp = new LayoutParams(LayoutParams.MATCH_PARENT, v.getMeasuredHeight());
1278                    row.setLayoutParams(lp);
1279                } else {
1280                    lp.height = v.getMeasuredHeight();
1281                }
1282            }
1283
1284            // Pre-measure so we can scale later.
1285            holder.measure();
1286            LayoutParams lp = row.getLayoutParams();
1287            if (lp == null) {
1288                lp = new LayoutParams(LayoutParams.MATCH_PARENT, holder.measuredRowHeight);
1289                row.setLayoutParams(lp);
1290            } else {
1291                lp.height = holder.measuredRowHeight;
1292            }
1293            row.setTag(holder);
1294            return holder;
1295        }
1296
1297        void bindViewHolder(int rowPosition, RowViewHolder holder) {
1298            final int start = getFirstRowPosition(rowPosition);
1299            final int startType = mChooserListAdapter.getPositionTargetType(start);
1300
1301            int end = start + mColumnCount - 1;
1302            while (mChooserListAdapter.getPositionTargetType(end) != startType && end >= start) {
1303                end--;
1304            }
1305
1306            if (startType == ChooserListAdapter.TARGET_SERVICE) {
1307                holder.row.setBackgroundColor(
1308                        getColor(R.color.chooser_service_row_background_color));
1309            } else {
1310                holder.row.setBackgroundColor(Color.TRANSPARENT);
1311            }
1312
1313            final int oldHeight = holder.row.getLayoutParams().height;
1314            holder.row.getLayoutParams().height = Math.max(1,
1315                    (int) (holder.measuredRowHeight * getRowScale(rowPosition)));
1316            if (holder.row.getLayoutParams().height != oldHeight) {
1317                holder.row.requestLayout();
1318            }
1319
1320            for (int i = 0; i < mColumnCount; i++) {
1321                final View v = holder.cells[i];
1322                if (start + i <= end) {
1323                    v.setVisibility(View.VISIBLE);
1324                    holder.itemIndices[i] = start + i;
1325                    mChooserListAdapter.bindView(holder.itemIndices[i], v);
1326                } else {
1327                    v.setVisibility(View.GONE);
1328                }
1329            }
1330        }
1331
1332        int getFirstRowPosition(int row) {
1333            final int callerCount = mChooserListAdapter.getCallerTargetCount();
1334            final int callerRows = (int) Math.ceil((float) callerCount / mColumnCount);
1335
1336            if (row < callerRows) {
1337                return row * mColumnCount;
1338            }
1339
1340            final int serviceCount = mChooserListAdapter.getServiceTargetCount();
1341            final int serviceRows = (int) Math.ceil((float) serviceCount / mColumnCount);
1342
1343            if (row < callerRows + serviceRows) {
1344                return callerCount + (row - callerRows) * mColumnCount;
1345            }
1346
1347            return callerCount + serviceCount
1348                    + (row - callerRows - serviceRows) * mColumnCount;
1349        }
1350    }
1351
1352    static class RowViewHolder {
1353        final View[] cells;
1354        final ViewGroup row;
1355        int measuredRowHeight;
1356        int[] itemIndices;
1357
1358        public RowViewHolder(ViewGroup row, int cellCount) {
1359            this.row = row;
1360            this.cells = new View[cellCount];
1361            this.itemIndices = new int[cellCount];
1362        }
1363
1364        public void measure() {
1365            final int spec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
1366            row.measure(spec, spec);
1367            measuredRowHeight = row.getMeasuredHeight();
1368        }
1369    }
1370
1371    static class ChooserTargetServiceConnection implements ServiceConnection {
1372        private DisplayResolveInfo mOriginalTarget;
1373        private ComponentName mConnectedComponent;
1374        private ChooserActivity mChooserActivity;
1375        private final Object mLock = new Object();
1376
1377        private final IChooserTargetResult mChooserTargetResult = new IChooserTargetResult.Stub() {
1378            @Override
1379            public void sendResult(List<ChooserTarget> targets) throws RemoteException {
1380                synchronized (mLock) {
1381                    if (mChooserActivity == null) {
1382                        Log.e(TAG, "destroyed ChooserTargetServiceConnection received result from "
1383                                + mConnectedComponent + "; ignoring...");
1384                        return;
1385                    }
1386                    mChooserActivity.filterServiceTargets(
1387                            mOriginalTarget.getResolveInfo().activityInfo.packageName, targets);
1388                    final Message msg = Message.obtain();
1389                    msg.what = CHOOSER_TARGET_SERVICE_RESULT;
1390                    msg.obj = new ServiceResultInfo(mOriginalTarget, targets,
1391                            ChooserTargetServiceConnection.this);
1392                    mChooserActivity.mChooserHandler.sendMessage(msg);
1393                }
1394            }
1395        };
1396
1397        public ChooserTargetServiceConnection(ChooserActivity chooserActivity,
1398                DisplayResolveInfo dri) {
1399            mChooserActivity = chooserActivity;
1400            mOriginalTarget = dri;
1401        }
1402
1403        @Override
1404        public void onServiceConnected(ComponentName name, IBinder service) {
1405            if (DEBUG) Log.d(TAG, "onServiceConnected: " + name);
1406            synchronized (mLock) {
1407                if (mChooserActivity == null) {
1408                    Log.e(TAG, "destroyed ChooserTargetServiceConnection got onServiceConnected");
1409                    return;
1410                }
1411
1412                final IChooserTargetService icts = IChooserTargetService.Stub.asInterface(service);
1413                try {
1414                    icts.getChooserTargets(mOriginalTarget.getResolvedComponentName(),
1415                            mOriginalTarget.getResolveInfo().filter, mChooserTargetResult);
1416                } catch (RemoteException e) {
1417                    Log.e(TAG, "Querying ChooserTargetService " + name + " failed.", e);
1418                    mChooserActivity.unbindService(this);
1419                    destroy();
1420                    mChooserActivity.mServiceConnections.remove(this);
1421                }
1422            }
1423        }
1424
1425        @Override
1426        public void onServiceDisconnected(ComponentName name) {
1427            if (DEBUG) Log.d(TAG, "onServiceDisconnected: " + name);
1428            synchronized (mLock) {
1429                if (mChooserActivity == null) {
1430                    Log.e(TAG,
1431                            "destroyed ChooserTargetServiceConnection got onServiceDisconnected");
1432                    return;
1433                }
1434
1435                mChooserActivity.unbindService(this);
1436                destroy();
1437                mChooserActivity.mServiceConnections.remove(this);
1438                if (mChooserActivity.mServiceConnections.isEmpty()) {
1439                    mChooserActivity.mChooserHandler.removeMessages(
1440                            CHOOSER_TARGET_SERVICE_WATCHDOG_TIMEOUT);
1441                    mChooserActivity.sendVoiceChoicesIfNeeded();
1442                }
1443                mConnectedComponent = null;
1444            }
1445        }
1446
1447        public void destroy() {
1448            synchronized (mLock) {
1449                mChooserActivity = null;
1450                mOriginalTarget = null;
1451            }
1452        }
1453
1454        @Override
1455        public String toString() {
1456            return "ChooserTargetServiceConnection{service="
1457                    + mConnectedComponent + ", activity="
1458                    + (mOriginalTarget != null
1459                    ? mOriginalTarget.getResolveInfo().activityInfo.toString()
1460                    : "<connection destroyed>") + "}";
1461        }
1462    }
1463
1464    static class ServiceResultInfo {
1465        public final DisplayResolveInfo originalTarget;
1466        public final List<ChooserTarget> resultTargets;
1467        public final ChooserTargetServiceConnection connection;
1468
1469        public ServiceResultInfo(DisplayResolveInfo ot, List<ChooserTarget> rt,
1470                ChooserTargetServiceConnection c) {
1471            originalTarget = ot;
1472            resultTargets = rt;
1473            connection = c;
1474        }
1475    }
1476
1477    static class RefinementResultReceiver extends ResultReceiver {
1478        private ChooserActivity mChooserActivity;
1479        private TargetInfo mSelectedTarget;
1480
1481        public RefinementResultReceiver(ChooserActivity host, TargetInfo target,
1482                Handler handler) {
1483            super(handler);
1484            mChooserActivity = host;
1485            mSelectedTarget = target;
1486        }
1487
1488        @Override
1489        protected void onReceiveResult(int resultCode, Bundle resultData) {
1490            if (mChooserActivity == null) {
1491                Log.e(TAG, "Destroyed RefinementResultReceiver received a result");
1492                return;
1493            }
1494            if (resultData == null) {
1495                Log.e(TAG, "RefinementResultReceiver received null resultData");
1496                return;
1497            }
1498
1499            switch (resultCode) {
1500                case RESULT_CANCELED:
1501                    mChooserActivity.onRefinementCanceled();
1502                    break;
1503                case RESULT_OK:
1504                    Parcelable intentParcelable = resultData.getParcelable(Intent.EXTRA_INTENT);
1505                    if (intentParcelable instanceof Intent) {
1506                        mChooserActivity.onRefinementResult(mSelectedTarget,
1507                                (Intent) intentParcelable);
1508                    } else {
1509                        Log.e(TAG, "RefinementResultReceiver received RESULT_OK but no Intent"
1510                                + " in resultData with key Intent.EXTRA_INTENT");
1511                    }
1512                    break;
1513                default:
1514                    Log.w(TAG, "Unknown result code " + resultCode
1515                            + " sent to RefinementResultReceiver");
1516                    break;
1517            }
1518        }
1519
1520        public void destroy() {
1521            mChooserActivity = null;
1522            mSelectedTarget = null;
1523        }
1524    }
1525
1526    class OffsetDataSetObserver extends DataSetObserver {
1527        private final AbsListView mListView;
1528        private int mCachedViewType = -1;
1529        private View mCachedView;
1530
1531        public OffsetDataSetObserver(AbsListView listView) {
1532            mListView = listView;
1533        }
1534
1535        @Override
1536        public void onChanged() {
1537            if (mResolverDrawerLayout == null) {
1538                return;
1539            }
1540
1541            final int chooserTargetRows = mChooserRowAdapter.getServiceTargetRowCount();
1542            int offset = 0;
1543            for (int i = 0; i < chooserTargetRows; i++)  {
1544                final int pos = mChooserRowAdapter.getCallerTargetRowCount() + i;
1545                final int vt = mChooserRowAdapter.getItemViewType(pos);
1546                if (vt != mCachedViewType) {
1547                    mCachedView = null;
1548                }
1549                final View v = mChooserRowAdapter.getView(pos, mCachedView, mListView);
1550                int height = ((RowViewHolder) (v.getTag())).measuredRowHeight;
1551
1552                offset += (int) (height * mChooserRowAdapter.getRowScale(pos));
1553
1554                if (vt >= 0) {
1555                    mCachedViewType = vt;
1556                    mCachedView = v;
1557                } else {
1558                    mCachedViewType = -1;
1559                }
1560            }
1561
1562            mResolverDrawerLayout.setCollapsibleHeightReserved(offset);
1563        }
1564    }
1565}
1566