Android 2.3.1 源码

/* * Copyright (C) 2006-2008 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 com.android.server.am; import com.android.internal.R; import com.android.internal.os.BatteryStatsImpl; import com.android.server.AttributeCache; import com.android.server.IntentResolver; import com.android.server.ProcessMap; import com.android.server.ProcessStats; import com.android.server.SystemServer; import com.android.server.Watchdog; import com.android.server.WindowManagerService; import com.android.server.am.ActivityStack.ActivityState; import dalvik.system.Zygote; import android.app.Activity; import android.app.ActivityManager; import android.app.ActivityManagerNative; import android.app.ActivityThread; import android.app.AlertDialog; import android.app.AppGlobals; import android.app.ApplicationErrorReport; import android.app.Dialog; import android.app.IActivityController; import android.app.IActivityWatcher; import android.app.IApplicationThread; import android.app.IInstrumentationWatcher; import android.app.INotificationManager; import android.app.IServiceConnection; import android.app.IThumbnailReceiver; import android.app.Instrumentation; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.app.Service; import android.app.backup.IBackupManager; import android.content.ActivityNotFoundException; import android.content.BroadcastReceiver; import android.content.ComponentName; import android.content.ContentResolver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.content.IIntentReceiver; import android.content.IIntentSender; import android.content.IntentSender; import android.content.pm.ActivityInfo; import android.content.pm.ApplicationInfo; import android.content.pm.ConfigurationInfo; import android.content.pm.IPackageDataObserver; import android.content.pm.IPackageManager; import android.content.pm.InstrumentationInfo; import android.content.pm.PackageInfo; import android.content.pm.PackageManager; import android.content.pm.PathPermission; import android.content.pm.ProviderInfo; import android.content.pm.ResolveInfo; import android.content.pm.ServiceInfo; import android.content.pm.PackageManager.NameNotFoundException; import android.content.res.Configuration; import android.graphics.Bitmap; import android.net.Uri; import android.os.Binder; import android.os.Build; import android.os.Bundle; import android.os.Debug; import android.os.DropBoxManager; import android.os.Environment; import android.os.FileObserver; import android.os.FileUtils; import android.os.Handler; import android.os.IBinder; import android.os.IPermissionController; import android.os.Looper; import android.os.Message; import android.os.Parcel; import android.os.ParcelFileDescriptor; import android.os.Process; import android.os.RemoteCallbackList; import android.os.RemoteException; import android.os.ServiceManager; import android.os.StrictMode; import android.os.SystemClock; import android.os.SystemProperties; import android.provider.Settings; import android.util.Config; import android.util.EventLog; import android.util.Slog; import android.util.Log; import android.util.PrintWriterPrinter; import android.util.SparseArray; import android.util.TimeUtils; import android.view.Gravity; import android.view.LayoutInflater; import android.view.View; import android.view.WindowManager; import android.view.WindowManagerPolicy; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.File; import java.io.FileDescriptor; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintWriter; import java.lang.IllegalStateException; import java.lang.ref.WeakReference; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.HashMap; import java.util.HashSet; import java.util.Iterator; import java.util.List; import java.util.Locale; import java.util.Map; import java.util.Set; import java.util.concurrent.atomic.AtomicBoolean; import java.util.concurrent.atomic.AtomicLong; public final class ActivityManagerService extends ActivityManagerNative implements Watchdog.Monitor, BatteryStatsImpl.BatteryCallback { static final String TAG = "ActivityManager"; static final boolean DEBUG = false; static final boolean localLOGV = DEBUG ? Config.LOGD : Config.LOGV; static final boolean DEBUG_SWITCH = localLOGV || false; static final boolean DEBUG_TASKS = localLOGV || false; static final boolean DEBUG_PAUSE = localLOGV || false; static final boolean DEBUG_OOM_ADJ = localLOGV || false; static final boolean DEBUG_TRANSITION = localLOGV || false; static final boolean DEBUG_BROADCAST = localLOGV || false; static final boolean DEBUG_BROADCAST_LIGHT = DEBUG_BROADCAST || false; static final boolean DEBUG_SERVICE = localLOGV || false; static final boolean DEBUG_SERVICE_EXECUTING = localLOGV || false; static final boolean DEBUG_VISBILITY = localLOGV || false; static final boolean DEBUG_PROCESSES = localLOGV || false; static final boolean DEBUG_PROVIDER = localLOGV || false; static final boolean DEBUG_URI_PERMISSION = localLOGV || false; static final boolean DEBUG_USER_LEAVING = localLOGV || false; static final boolean DEBUG_RESULTS = localLOGV || false; static final boolean DEBUG_BACKUP = localLOGV || false; static final boolean DEBUG_CONFIGURATION = localLOGV || false; static final boolean DEBUG_POWER = localLOGV || false; static final boolean DEBUG_POWER_QUICK = DEBUG_POWER || false; static final boolean VALIDATE_TOKENS = false; static final boolean SHOW_ACTIVITY_START_TIME = true; // Control over CPU and battery monitoring. static final long BATTERY_STATS_TIME = 30*60*1000; // write battery stats every 30 minutes. static final boolean MONITOR_CPU_USAGE = true; static final long MONITOR_CPU_MIN_TIME = 5*1000; // don't sample cpu less than every 5 seconds. static final long MONITOR_CPU_MAX_TIME = 0x0fffffff; // wait possibly forever for next cpu sample. static final boolean MONITOR_THREAD_CPU_USAGE = false; // The flags that are set for all calls we make to the package manager. static final int STOCK_PM_FLAGS = PackageManager.GET_SHARED_LIBRARY_FILES; private static final String SYSTEM_SECURE = "ro.secure"; // This is the maximum number of application processes we would like // to have running. Due to the asynchronous nature of things, we can // temporarily go beyond this limit. static final int MAX_PROCESSES = 2; // Set to false to leave processes running indefinitely, relying on // the kernel killing them as resources are required. static final boolean ENFORCE_PROCESS_LIMIT = false; // This is the maximum number of activities that we would like to have // running at a given time. static final int MAX_ACTIVITIES = 20; // Maximum number of recent tasks that we can remember. static final int MAX_RECENT_TASKS = 20; // Amount of time after a call to stopAppSwitches() during which we will // prevent further untrusted switches from happening. static final long APP_SWITCH