ResolverListController.java revision 9149dcaf414ebdac231af93d44abd5951a514a7e 
1/*
2 * Copyright (C) 2016 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
17
18package com.android.internal.app;
19
20import android.annotation.WorkerThread;
21import android.app.ActivityManager;
22import android.app.AppGlobals;
23import android.content.ComponentName;
24import android.content.Context;
25import android.content.Intent;
26import android.content.IntentFilter;
27import android.content.pm.ActivityInfo;
28import android.content.pm.ApplicationInfo;
29import android.content.pm.PackageManager;
30import android.content.pm.ResolveInfo;
31import android.os.RemoteException;
32import android.util.Log;
33import com.android.internal.annotations.VisibleForTesting;
34
35import java.util.ArrayList;
36import java.util.Collections;
37import java.util.List;
38
39/**
40 * A helper for the ResolverActivity that exposes methods to retrieve, filter and sort its list of
41 * resolvers.
42 */
43public class ResolverListController {
44
45    private final Context mContext;
46    private final PackageManager mpm;
47    private final int mLaunchedFromUid;
48
49    // Needed for sorting resolvers.
50    private final Intent mTargetIntent;
51    private final String mReferrerPackage;
52
53    private static final String TAG = "ResolverListController";
54    private static final boolean DEBUG = false;
55
56    private ResolverComparator mResolverComparator;
57
58    public ResolverListController(
59            Context context,
60            PackageManager pm,
61            Intent targetIntent,
62            String referrerPackage,
63            int launchedFromUid) {
64        mContext = context;
65        mpm = pm;
66        mLaunchedFromUid = launchedFromUid;
67        mTargetIntent = targetIntent;
68        mReferrerPackage = referrerPackage;
69    }
70
71    @VisibleForTesting
72    ResolveInfo getLastChosen() throws RemoteException {
73        return AppGlobals.getPackageManager().getLastChosenActivity(
74                mTargetIntent, mTargetIntent.resolveTypeIfNeeded(mContext.getContentResolver()),
75                PackageManager.MATCH_DEFAULT_ONLY);
76    }
77
78    @VisibleForTesting
79    void setLastChosen(Intent intent, IntentFilter filter, int match)
80            throws RemoteException {
81        AppGlobals.getPackageManager().setLastChosenActivity(intent,
82                intent.resolveType(mContext.getContentResolver()),
83                PackageManager.MATCH_DEFAULT_ONLY,
84                filter, match, intent.getComponent());
85    }
86
87    @VisibleForTesting
88    public List<ResolverActivity.ResolvedComponentInfo> getResolversForIntent(
89            boolean shouldGetResolvedFilter,
90            boolean shouldGetActivityMetadata,
91            List<Intent> intents) {
92        List<ResolverActivity.ResolvedComponentInfo> resolvedComponents = null;
93        for (int i = 0, N = intents.size(); i < N; i++) {
94            final Intent intent = intents.get(i);
95            final List<ResolveInfo> infos = mpm.queryIntentActivities(intent,
96                    PackageManager.MATCH_DEFAULT_ONLY
97                            | (shouldGetResolvedFilter ? PackageManager.GET_RESOLVED_FILTER : 0)
98                            | (shouldGetActivityMetadata ? PackageManager.GET_META_DATA : 0));
99            if (infos != null) {
100                if (resolvedComponents == null) {
101                    resolvedComponents = new ArrayList<>();
102                }
103                addResolveListDedupe(resolvedComponents, intent, infos);
104            }
105        }
106        return resolvedComponents;
107    }
108
109    @VisibleForTesting
110    public void addResolveListDedupe(List<ResolverActivity.ResolvedComponentInfo> into,
111            Intent intent,
112            List<ResolveInfo> from) {
113        final int fromCount = from.size();
114        final int intoCount = into.size();
115        for (int i = 0; i < fromCount; i++) {
116            final ResolveInfo newInfo = from.get(i);
117            boolean found = false;
118            // Only loop to the end of into as it was before we started; no dupes in from.
119            for (int j = 0; j < intoCount; j++) {
120                final ResolverActivity.ResolvedComponentInfo rci = into.get(j);
121                if (isSameResolvedComponent(newInfo, rci)) {
122                    found = true;
123                    rci.add(intent, newInfo);
124                    break;
125                }
126            }
127            if (!found) {
128                final ComponentName name = new ComponentName(
129                        newInfo.activityInfo.packageName, newInfo.activityInfo.name);
130                final ResolverActivity.ResolvedComponentInfo rci =
131                        new ResolverActivity.ResolvedComponentInfo(name, intent, newInfo);
132                rci.setPinned(isComponentPinned(name));
133                into.add(rci);
134            }
135        }
136    }
137
138    // Filter out any activities that the launched uid does not have permission for.
139    //
140    // Also filter out those that are suspended because they couldn't be started. We don't do this
141    // when we have an explicit list of resolved activities, because that only happens when
142    // we are being subclassed, so we can safely launch whatever they gave us.
143    //
144    // To preserve the inputList, optionally will return the original list if any modification has
145    // been made.
146    @VisibleForTesting
147    public ArrayList<ResolverActivity.ResolvedComponentInfo> filterIneligibleActivities(
148            List<ResolverActivity.ResolvedComponentInfo> inputList,
149            boolean returnCopyOfOriginalListIfModified) {
150        ArrayList<ResolverActivity.ResolvedComponentInfo> listToReturn = null;
151        for (int i = inputList.size()-1; i >= 0; i--) {
152            ActivityInfo ai = inputList.get(i)
153                    .getResolveInfoAt(0).activityInfo;
154            int granted = ActivityManager.checkComponentPermission(
155                    ai.permission, mLaunchedFromUid,
156                    ai.applicationInfo.uid, ai.exported);
157            boolean suspended = (ai.applicationInfo.flags
158                    & ApplicationInfo.FLAG_SUSPENDED) != 0;
159            if (granted != PackageManager.PERMISSION_GRANTED || suspended
160                    || isComponentFiltered(ai.getComponentName())) {
161                // Access not allowed! We're about to filter an item,
162                // so modify the unfiltered version if it hasn't already been modified.
163                if (returnCopyOfOriginalListIfModified && listToReturn == null) {
164                    listToReturn = new ArrayList<>(inputList);
165                }
166                inputList.remove(i);
167            }
168        }
169        return listToReturn;
170    }
171
172    // Filter out any low priority items.
173    //
174    // To preserve the inputList, optionally will return the original list if any modification has
175    // been made.
176    @VisibleForTesting
177    public ArrayList<ResolverActivity.ResolvedComponentInfo> filterLowPriority(
178            List<ResolverActivity.ResolvedComponentInfo> inputList,
179            boolean returnCopyOfOriginalListIfModified) {
180        ArrayList<ResolverActivity.ResolvedComponentInfo> listToReturn = null;
181        // Only display the first matches that are either of equal
182        // priority or have asked to be default options.
183        ResolverActivity.ResolvedComponentInfo rci0 = inputList.get(0);
184        ResolveInfo r0 = rci0.getResolveInfoAt(0);
185        int N = inputList.size();
186        for (int i = 1; i < N; i++) {
187            ResolveInfo ri = inputList.get(i).getResolveInfoAt(0);
188            if (DEBUG) Log.v(
189                    TAG,
190                    r0.activityInfo.name + "=" +
191                            r0.priority + "/" + r0.isDefault + " vs " +
192                            ri.activityInfo.name + "=" +
193                            ri.priority + "/" + ri.isDefault);
194            if (r0.priority != ri.priority ||
195                    r0.isDefault != ri.isDefault) {
196                while (i < N) {
197                    if (returnCopyOfOriginalListIfModified && listToReturn == null) {
198                        listToReturn = new ArrayList<>(inputList);
199                    }
200                    inputList.remove(i);
201                    N--;
202                }
203            }
204        }
205        return listToReturn;
206    }
207
208    @VisibleForTesting
209    @WorkerThread
210    public void sort(List<ResolverActivity.ResolvedComponentInfo> inputList) {
211        if (mResolverComparator == null) {
212            mResolverComparator = new ResolverComparator(mContext, mTargetIntent, mReferrerPackage);
213        }
214        mResolverComparator.compute(inputList);
215        Collections.sort(inputList, mResolverComparator);
216    }
217
218    private static boolean isSameResolvedComponent(ResolveInfo a,
219            ResolverActivity.ResolvedComponentInfo b) {
220        final ActivityInfo ai = a.activityInfo;
221        return ai.packageName.equals(b.name.getPackageName())
222                && ai.name.equals(b.name.getClassName());
223    }
224
225    boolean isComponentPinned(ComponentName name) {
226        return false;
227    }
228
229    boolean isComponentFiltered(ComponentName componentName) {
230        return false;
231    }
232
233    @VisibleForTesting
234    public float getScore(ResolverActivity.DisplayResolveInfo target) {
235        if (mResolverComparator == null) {
236            mResolverComparator = new ResolverComparator(mContext, mTargetIntent, mReferrerPackage);
237        }
238        return mResolverComparator.getScore(target.getResolvedComponentName());
239    }
240
241    public void updateModel(ComponentName componentName) {
242        if (mResolverComparator != null) {
243            mResolverComparator.updateModel(componentName);
244        }
245    }
246
247    public void updateChooserCounts(String packageName, int userId, String action) {
248        if (mResolverComparator != null) {
249            mResolverComparator.updateChooserCounts(packageName, userId, action);
250        }
251    }
252}
253