| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.app; |
| |
| import android.content.Context; |
| import android.os.Handler; |
| import android.os.Looper; |
| import android.os.Message; |
| import android.os.RemoteException; |
| import android.util.SparseArray; |
| import java.util.List; |
| |
| /** |
| * Helper for monitoring the current importance of applications. |
| * @hide |
| */ |
| public class AppImportanceMonitor { |
| final Context mContext; |
| |
| final SparseArray<AppEntry> mApps = new SparseArray<>(); |
| |
| static class AppEntry { |
| final int uid; |
| final SparseArray<Integer> procs = new SparseArray<>(1); |
| int importance = ActivityManager.RunningAppProcessInfo.IMPORTANCE_GONE; |
| |
| AppEntry(int _uid) { |
| uid = _uid; |
| } |
| } |
| |
| final IProcessObserver mProcessObserver = new IProcessObserver.Stub() { |
| @Override |
| public void onForegroundActivitiesChanged(int pid, int uid, boolean foregroundActivities) { |
| } |
| |
| @Override |
| public void onProcessStateChanged(int pid, int uid, int procState) { |
| synchronized (mApps) { |
| updateImportanceLocked(pid, uid, |
| ActivityManager.RunningAppProcessInfo.procStateToImportance(procState), |
| true); |
| } |
| } |
| |
| @Override |
| public void onProcessDied(int pid, int uid) { |
| synchronized (mApps) { |
| updateImportanceLocked(pid, uid, |
| ActivityManager.RunningAppProcessInfo.IMPORTANCE_GONE, true); |
| } |
| } |
| }; |
| |
| static final int MSG_UPDATE = 1; |
| |
| final Handler mHandler; |
| |
| public AppImportanceMonitor(Context context, Looper looper) { |
| mContext = context; |
| mHandler = new Handler(looper) { |
| @Override |
| public void handleMessage(Message msg) { |
| switch (msg.what) { |
| case MSG_UPDATE: |
| onImportanceChanged(msg.arg1, msg.arg2&0xffff, msg.arg2>>16); |
| break; |
| default: |
| super.handleMessage(msg); |
| } |
| } |
| }; |
| ActivityManager am = (ActivityManager)context.getSystemService(Context.ACTIVITY_SERVICE); |
| try { |
| ActivityManager.getService().registerProcessObserver(mProcessObserver); |
| } catch (RemoteException e) { |
| } |
| List<ActivityManager.RunningAppProcessInfo> apps = am.getRunningAppProcesses(); |
| if (apps != null) { |
| for (int i=0; i<apps.size(); i++) { |
| ActivityManager.RunningAppProcessInfo app = apps.get(i); |
| updateImportanceLocked(app.uid, app.pid, app.importance, false); |
| } |
| } |
| } |
| |
| public int getImportance(int uid) { |
| AppEntry ent = mApps.get(uid); |
| if (ent == null) { |
| return ActivityManager.RunningAppProcessInfo.IMPORTANCE_GONE; |
| } |
| return ent.importance; |
| } |
| |
| /** |
| * Report when an app's importance changed. Called on looper given to constructor. |
| */ |
| public void onImportanceChanged(int uid, int importance, int oldImportance) { |
| } |
| |
| void updateImportanceLocked(int uid, int pid, int importance, boolean repChange) { |
| AppEntry ent = mApps.get(uid); |
| if (ent == null) { |
| ent = new AppEntry(uid); |
| mApps.put(uid, ent); |
| } |
| if (importance >= ActivityManager.RunningAppProcessInfo.IMPORTANCE_GONE) { |
| ent.procs.remove(pid); |
| } else { |
| ent.procs.put(pid, importance); |
| } |
| updateImportanceLocked(ent, repChange); |
| } |
| |
| void updateImportanceLocked(AppEntry ent, boolean repChange) { |
| int appImp = ActivityManager.RunningAppProcessInfo.IMPORTANCE_GONE; |
| for (int i=0; i<ent.procs.size(); i++) { |
| int procImp = ent.procs.valueAt(i); |
| if (procImp < appImp) { |
| appImp = procImp; |
| } |
| } |
| if (appImp != ent.importance) { |
| int impCode = appImp | (ent.importance<<16); |
| ent.importance = appImp; |
| if (appImp >= ActivityManager.RunningAppProcessInfo.IMPORTANCE_GONE) { |
| mApps.remove(ent.uid); |
| } |
| if (repChange) { |
| mHandler.obtainMessage(MSG_UPDATE, ent.uid, impCode).sendToTarget(); |
| } |
| } |
| } |
| } |