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