Dianne Hackborn | fee756f | 2014-07-16 17:31:10 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2014 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 android.app; |
| 18 | |
| 19 | import android.content.Context; |
| 20 | import android.os.Handler; |
| 21 | import android.os.Looper; |
| 22 | import android.os.Message; |
| 23 | import android.os.RemoteException; |
| 24 | import android.util.SparseArray; |
Dianne Hackborn | fee756f | 2014-07-16 17:31:10 -0700 | [diff] [blame] | 25 | import java.util.List; |
| 26 | |
| 27 | /** |
| 28 | * Helper for monitoring the current importance of applications. |
| 29 | * @hide |
| 30 | */ |
| 31 | public class AppImportanceMonitor { |
| 32 | final Context mContext; |
| 33 | |
| 34 | final SparseArray<AppEntry> mApps = new SparseArray<>(); |
| 35 | |
| 36 | static class AppEntry { |
| 37 | final int uid; |
| 38 | final SparseArray<Integer> procs = new SparseArray<>(1); |
| 39 | int importance = ActivityManager.RunningAppProcessInfo.IMPORTANCE_GONE; |
| 40 | |
| 41 | AppEntry(int _uid) { |
| 42 | uid = _uid; |
| 43 | } |
| 44 | } |
| 45 | |
| 46 | final IProcessObserver mProcessObserver = new IProcessObserver.Stub() { |
| 47 | @Override |
| 48 | public void onForegroundActivitiesChanged(int pid, int uid, boolean foregroundActivities) { |
| 49 | } |
| 50 | |
| 51 | @Override |
| 52 | public void onProcessStateChanged(int pid, int uid, int procState) { |
| 53 | synchronized (mApps) { |
| 54 | updateImportanceLocked(pid, uid, |
| 55 | ActivityManager.RunningAppProcessInfo.procStateToImportance(procState), |
| 56 | true); |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | @Override |
| 61 | public void onProcessDied(int pid, int uid) { |
| 62 | synchronized (mApps) { |
| 63 | updateImportanceLocked(pid, uid, |
| 64 | ActivityManager.RunningAppProcessInfo.IMPORTANCE_GONE, true); |
| 65 | } |
| 66 | } |
| 67 | }; |
| 68 | |
| 69 | static final int MSG_UPDATE = 1; |
| 70 | |
| 71 | final Handler mHandler; |
| 72 | |
| 73 | public AppImportanceMonitor(Context context, Looper looper) { |
| 74 | mContext = context; |
| 75 | mHandler = new Handler(looper) { |
| 76 | @Override |
| 77 | public void handleMessage(Message msg) { |
| 78 | switch (msg.what) { |
| 79 | case MSG_UPDATE: |
| 80 | onImportanceChanged(msg.arg1, msg.arg2&0xffff, msg.arg2>>16); |
| 81 | break; |
| 82 | default: |
| 83 | super.handleMessage(msg); |
| 84 | } |
| 85 | } |
| 86 | }; |
| 87 | ActivityManager am = (ActivityManager)context.getSystemService(Context.ACTIVITY_SERVICE); |
| 88 | try { |
| 89 | ActivityManagerNative.getDefault().registerProcessObserver(mProcessObserver); |
| 90 | } catch (RemoteException e) { |
| 91 | } |
| 92 | List<ActivityManager.RunningAppProcessInfo> apps = am.getRunningAppProcesses(); |
| 93 | if (apps != null) { |
| 94 | for (int i=0; i<apps.size(); i++) { |
| 95 | ActivityManager.RunningAppProcessInfo app = apps.get(i); |
| 96 | updateImportanceLocked(app.uid, app.pid, app.importance, false); |
| 97 | } |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | public int getImportance(int uid) { |
| 102 | AppEntry ent = mApps.get(uid); |
| 103 | if (ent == null) { |
| 104 | return ActivityManager.RunningAppProcessInfo.IMPORTANCE_GONE; |
| 105 | } |
| 106 | return ent.importance; |
| 107 | } |
| 108 | |
| 109 | /** |
| 110 | * Report when an app's importance changed. Called on looper given to constructor. |
| 111 | */ |
| 112 | public void onImportanceChanged(int uid, int importance, int oldImportance) { |
| 113 | } |
| 114 | |
| 115 | void updateImportanceLocked(int uid, int pid, int importance, boolean repChange) { |
| 116 | AppEntry ent = mApps.get(uid); |
| 117 | if (ent == null) { |
| 118 | ent = new AppEntry(uid); |
| 119 | mApps.put(uid, ent); |
| 120 | } |
| 121 | if (importance >= ActivityManager.RunningAppProcessInfo.IMPORTANCE_GONE) { |
| 122 | ent.procs.remove(pid); |
| 123 | } else { |
| 124 | ent.procs.put(pid, importance); |
| 125 | } |
| 126 | updateImportanceLocked(ent, repChange); |
| 127 | } |
| 128 | |
| 129 | void updateImportanceLocked(AppEntry ent, boolean repChange) { |
| 130 | int appImp = ActivityManager.RunningAppProcessInfo.IMPORTANCE_GONE; |
| 131 | for (int i=0; i<ent.procs.size(); i++) { |
| 132 | int procImp = ent.procs.valueAt(i); |
| 133 | if (procImp < appImp) { |
| 134 | appImp = procImp; |
| 135 | } |
| 136 | } |
| 137 | if (appImp != ent.importance) { |
| 138 | int impCode = appImp | (ent.importance<<16); |
| 139 | ent.importance = appImp; |
| 140 | if (appImp >= ActivityManager.RunningAppProcessInfo.IMPORTANCE_GONE) { |
| 141 | mApps.remove(ent.uid); |
| 142 | } |
| 143 | if (repChange) { |
| 144 | mHandler.obtainMessage(MSG_UPDATE, ent.uid, impCode).sendToTarget(); |
| 145 | } |
| 146 | } |
| 147 | } |
| 148 | } |