Winson Chung | 61c9e5a | 2017-10-11 10:39:32 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2017 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 | package com.android.server.am; |
| 18 | |
| 19 | import static com.android.server.am.ActivityManagerDebugConfig.TAG_AM; |
| 20 | import static com.android.server.am.ActivityManagerDebugConfig.TAG_WITH_CLASS_NAME; |
| 21 | |
| 22 | import android.app.ActivityManager.RunningTaskInfo; |
| 23 | import android.app.WindowConfiguration.ActivityType; |
| 24 | import android.app.WindowConfiguration.WindowingMode; |
| 25 | import android.util.SparseArray; |
| 26 | |
| 27 | import java.util.ArrayList; |
| 28 | import java.util.Comparator; |
| 29 | import java.util.Iterator; |
| 30 | import java.util.List; |
| 31 | import java.util.TreeSet; |
| 32 | |
| 33 | /** |
| 34 | * Class for resolving the set of running tasks in the system. |
| 35 | */ |
| 36 | class RunningTasks { |
| 37 | |
| 38 | // Comparator to sort by last active time (descending) |
| 39 | private static final Comparator<TaskRecord> LAST_ACTIVE_TIME_COMPARATOR = |
| 40 | (o1, o2) -> Long.signum(o2.lastActiveTime - o1.lastActiveTime); |
| 41 | |
| 42 | private final TaskRecord.TaskActivitiesReport mTmpReport = |
| 43 | new TaskRecord.TaskActivitiesReport(); |
| 44 | private final TreeSet<TaskRecord> mTmpSortedSet = new TreeSet<>(LAST_ACTIVE_TIME_COMPARATOR); |
| 45 | private final ArrayList<TaskRecord> mTmpStackTasks = new ArrayList<>(); |
| 46 | |
| 47 | void getTasks(int maxNum, List<RunningTaskInfo> list, @ActivityType int ignoreActivityType, |
| 48 | @WindowingMode int ignoreWindowingMode, SparseArray<ActivityDisplay> activityDisplays, |
| 49 | int callingUid, boolean allowed) { |
Winson Chung | 3907285 | 2017-11-01 17:09:48 -0700 | [diff] [blame] | 50 | // Return early if there are no tasks to fetch |
| 51 | if (maxNum <= 0) { |
| 52 | return; |
| 53 | } |
Winson Chung | 61c9e5a | 2017-10-11 10:39:32 -0700 | [diff] [blame] | 54 | |
| 55 | // Gather all of the tasks across all of the tasks, and add them to the sorted set |
| 56 | mTmpSortedSet.clear(); |
| 57 | mTmpStackTasks.clear(); |
| 58 | final int numDisplays = activityDisplays.size(); |
| 59 | for (int displayNdx = 0; displayNdx < numDisplays; ++displayNdx) { |
| 60 | final ActivityDisplay display = activityDisplays.valueAt(displayNdx); |
| 61 | for (int stackNdx = display.getChildCount() - 1; stackNdx >= 0; --stackNdx) { |
| 62 | final ActivityStack stack = display.getChildAt(stackNdx); |
| 63 | stack.getRunningTasks(mTmpStackTasks, ignoreActivityType, ignoreWindowingMode, |
| 64 | callingUid, allowed); |
| 65 | for (int i = mTmpStackTasks.size() - 1; i >= 0; i--) { |
| 66 | mTmpSortedSet.addAll(mTmpStackTasks); |
| 67 | } |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | // Take the first {@param maxNum} tasks and create running task infos for them |
| 72 | final Iterator<TaskRecord> iter = mTmpSortedSet.iterator(); |
| 73 | while (iter.hasNext()) { |
| 74 | if (maxNum == 0) { |
| 75 | break; |
| 76 | } |
| 77 | |
| 78 | final TaskRecord task = iter.next(); |
| 79 | list.add(createRunningTaskInfo(task)); |
| 80 | maxNum--; |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | /** |
| 85 | * Constructs a {@link RunningTaskInfo} from a given {@param task}. |
| 86 | */ |
| 87 | private RunningTaskInfo createRunningTaskInfo(TaskRecord task) { |
| 88 | task.getNumRunningActivities(mTmpReport); |
| 89 | |
| 90 | final RunningTaskInfo ci = new RunningTaskInfo(); |
| 91 | ci.id = task.taskId; |
| 92 | ci.stackId = task.getStackId(); |
| 93 | ci.baseActivity = mTmpReport.base.intent.getComponent(); |
| 94 | ci.topActivity = mTmpReport.top.intent.getComponent(); |
| 95 | ci.lastActiveTime = task.lastActiveTime; |
| 96 | ci.description = task.lastDescription; |
| 97 | ci.numActivities = mTmpReport.numActivities; |
| 98 | ci.numRunning = mTmpReport.numRunning; |
| 99 | ci.supportsSplitScreenMultiWindow = task.supportsSplitScreenWindowingMode(); |
| 100 | ci.resizeMode = task.mResizeMode; |
| 101 | ci.configuration.setTo(task.getConfiguration()); |
| 102 | return ci; |
| 103 | } |
| 104 | } |