DeviceStorageMonitorService.java revision 3161795b2353171bb0636fb3ea6dab7dec80a4f4
19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2007-2008 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpackage com.android.server; 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport com.android.server.am.ActivityManagerService; 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.app.Notification; 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.app.NotificationManager; 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.app.PendingIntent; 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.ContentResolver; 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.Context; 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.Intent; 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.pm.IPackageDataObserver; 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.pm.IPackageManager; 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.os.Binder; 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.os.Handler; 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.os.Message; 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.os.Process; 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.os.RemoteException; 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.os.ServiceManager; 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.os.StatFs; 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.os.SystemClock; 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.os.SystemProperties; 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.provider.Settings.Gservices; 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.util.Config; 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.util.EventLog; 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.util.Log; 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.provider.Settings; 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This class implements a service to monitor the amount of disk storage space 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * on the device. If the free storage on device is less than a tunable threshold value 463161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker * (default is 10%. this value is a gservices parameter) a low memory notification is 473161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker * displayed to alert the user. If the user clicks on the low memory notification the 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Application Manager application gets launched to let the user free storage space. 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Event log events: 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * A low memory event with the free storage on device in bytes is logged to the event log 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * when the device goes low on storage space. 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The amount of free storage on the device is periodically logged to the event log. The log 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * interval is a gservices parameter with a default value of 12 hours 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * When the free storage differential goes below a threshold(again a gservices parameter with 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * a default value of 2MB), the free memory is logged to the event log 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectclass DeviceStorageMonitorService extends Binder { 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final String TAG = "DeviceStorageMonitorService"; 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final boolean DEBUG = false; 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final boolean localLOGV = DEBUG ? Config.LOGD : Config.LOGV; 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int DEVICE_MEMORY_WHAT = 1; 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int MONITOR_INTERVAL = 1; //in minutes 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int LOW_MEMORY_NOTIFICATION_ID = 1; 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int DEFAULT_THRESHOLD_PERCENTAGE = 10; 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int DEFAULT_FREE_STORAGE_LOG_INTERVAL_IN_MINUTES = 12*60; //in minutes 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int EVENT_LOG_STORAGE_BELOW_THRESHOLD = 2744; 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int EVENT_LOG_LOW_STORAGE_NOTIFICATION = 2745; 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int EVENT_LOG_FREE_STORAGE_LEFT = 2746; 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final long DEFAULT_DISK_FREE_CHANGE_REPORTING_THRESHOLD = 2 * 1024 * 1024; // 2MB 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final long DEFAULT_CHECK_INTERVAL = MONITOR_INTERVAL*60*1000; 713161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker private long mFreeMem; // on /data 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private long mLastReportedFreeMem; 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private long mLastReportedFreeMemTime; 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mLowMemFlag=false; 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private Context mContext; 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private ContentResolver mContentResolver; 773161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker private long mTotalMemory; // on /data 783161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker private StatFs mDataFileStats; 793161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker private StatFs mSystemFileStats; 803161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker private StatFs mCacheFileStats; 813161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker private static final String DATA_PATH = "/data"; 823161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker private static final String SYSTEM_PATH = "/system"; 833161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker private static final String CACHE_PATH = "/cache"; 843161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker private long mThreadStartTime = -1; 853161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker private boolean mClearSucceeded = false; 863161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker private boolean mClearingCache; 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private Intent mStorageLowIntent; 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private Intent mStorageOkIntent; 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private CachePackageDataObserver mClearCacheObserver; 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int _TRUE = 1; 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int _FALSE = 0; 923161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This string is used for ServiceManager access to this class. 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static final String SERVICE = "devicestoragemonitor"; 973161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 993161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker * Handler that checks the amount of disk space on the device and sends a 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * notification if the device runs low on disk space 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Handler mHandler = new Handler() { 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void handleMessage(Message msg) { 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //dont handle an invalid message 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (msg.what != DEVICE_MEMORY_WHAT) { 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.e(TAG, "Will not process invalid message"); 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkMemory(msg.arg1 == _TRUE); 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project }; 1133161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project class CachePackageDataObserver extends IPackageDataObserver.Stub { 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void onRemoveCompleted(String packageName, boolean succeeded) { 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mClearSucceeded = succeeded; 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mClearingCache = false; 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if(localLOGV) Log.i(TAG, " Clear succeeded:"+mClearSucceeded 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project +", mClearingCache:"+mClearingCache+" Forcing memory check"); 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project postCheckMemoryMsg(false, 0); 1213161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker } 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1233161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final void restatDataDir() { 1253161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker try { 1263161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker mDataFileStats.restat(DATA_PATH); 1273161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker mFreeMem = (long) mDataFileStats.getAvailableBlocks() * 1283161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker mDataFileStats.getBlockSize(); 1293161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker } catch (IllegalArgumentException e) { 1303161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker // use the old value of mFreeMem 1313161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker } 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Allow freemem to be overridden by debug.freemem for testing 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project String debugFreeMem = SystemProperties.get("debug.freemem"); 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!"".equals(debugFreeMem)) { 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFreeMem = Long.parseLong(debugFreeMem); 1369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Read the log interval from Gservices 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long freeMemLogInterval = Gservices.getLong(mContentResolver, 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Gservices.SYS_FREE_STORAGE_LOG_INTERVAL, 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project DEFAULT_FREE_STORAGE_LOG_INTERVAL_IN_MINUTES)*60*1000; 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //log the amount of free memory in event log 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long currTime = SystemClock.elapsedRealtime(); 1433161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker if((mLastReportedFreeMemTime == 0) || 1443161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker (currTime-mLastReportedFreeMemTime) >= freeMemLogInterval) { 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLastReportedFreeMemTime = currTime; 1463161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker long mFreeSystem = -1, mFreeCache = -1; 1473161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker try { 1483161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker mSystemFileStats.restat(SYSTEM_PATH); 1493161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker mFreeSystem = (long) mSystemFileStats.getAvailableBlocks() * 1503161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker mSystemFileStats.getBlockSize(); 1513161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker } catch (IllegalArgumentException e) { 1523161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker // ignore; report -1 1533161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker } 1543161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker try { 1553161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker mCacheFileStats.restat(CACHE_PATH); 1563161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker mFreeCache = (long) mCacheFileStats.getAvailableBlocks() * 1573161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker mCacheFileStats.getBlockSize(); 1583161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker } catch (IllegalArgumentException e) { 1593161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker // ignore; report -1 1603161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker } 1613161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker mCacheFileStats.restat(CACHE_PATH); 1623161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker EventLog.writeEvent(EVENT_LOG_FREE_STORAGE_LEFT, 1633161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker mFreeMem, mFreeSystem, mFreeCache); 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Read the reporting threshold from Gservices 1669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long threshold = Gservices.getLong(mContentResolver, 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Gservices.DISK_FREE_CHANGE_REPORTING_THRESHOLD, 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project DEFAULT_DISK_FREE_CHANGE_REPORTING_THRESHOLD); 1699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // If mFree changed significantly log the new value 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long delta = mFreeMem - mLastReportedFreeMem; 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (delta > threshold || delta < -threshold) { 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLastReportedFreeMem = mFreeMem; 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project EventLog.writeEvent(EVENT_LOG_STORAGE_BELOW_THRESHOLD, mFreeMem); 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1763161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker 1779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final void clearCache() { 1789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mClearCacheObserver == null) { 1799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Lazy instantiation 1809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mClearCacheObserver = new CachePackageDataObserver(); 1819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mClearingCache = true; 1839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 1849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (localLOGV) Log.i(TAG, "Clearing cache"); 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project IPackageManager.Stub.asInterface(ServiceManager.getService("package")). 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project freeStorageAndNotify(getMemThreshold(), mClearCacheObserver); 1879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (RemoteException e) { 1889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.w(TAG, "Failed to get handle for PackageManger Exception: "+e); 1899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mClearingCache = false; 1909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mClearSucceeded = false; 1919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1933161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker 1949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final void checkMemory(boolean checkCache) { 1953161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker //if the thread that was started to clear cache is still running do nothing till its 1963161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker //finished clearing cache. Ideally this flag could be modified by clearCache 1979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // and should be accessed via a lock but even if it does this test will fail now and 1989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //hopefully the next time this flag will be set to the correct value. 1999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if(mClearingCache) { 2009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if(localLOGV) Log.i(TAG, "Thread already running just skip"); 2019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //make sure the thread is not hung for too long 2029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long diffTime = System.currentTimeMillis() - mThreadStartTime; 2039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if(diffTime > (10*60*1000)) { 2049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.w(TAG, "Thread that clears cache file seems to run for ever"); 2053161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker } 2069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 2079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project restatDataDir(); 2089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (localLOGV) Log.v(TAG, "freeMemory="+mFreeMem); 2093161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker 2109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //post intent to NotificationManager to display icon if necessary 2119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long memThreshold = getMemThreshold(); 2129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFreeMem < memThreshold) { 2139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mLowMemFlag) { 2149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (checkCache) { 2159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // See if clearing cache helps 2169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Note that clearing cache is asynchronous and so we do a 2179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // memory check again once the cache has been cleared. 2189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mThreadStartTime = System.currentTimeMillis(); 2199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mClearSucceeded = false; 2209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project clearCache(); 2219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 2229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.i(TAG, "Running low on memory. Sending notification"); 2239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sendNotification(); 2249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLowMemFlag = true; 2259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 2279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (localLOGV) Log.v(TAG, "Running low on memory " + 2289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "notification already sent. do nothing"); 2299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 2319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mLowMemFlag) { 2329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.i(TAG, "Memory available. Cancelling notification"); 2339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project cancelNotification(); 2349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLowMemFlag = false; 2359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if(localLOGV) Log.i(TAG, "Posting Message again"); 2399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //keep posting messages to itself periodically 2409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project postCheckMemoryMsg(true, DEFAULT_CHECK_INTERVAL); 2419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2423161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker 2439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void postCheckMemoryMsg(boolean clearCache, long delay) { 2449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Remove queued messages 2459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mHandler.removeMessages(DEVICE_MEMORY_WHAT); 2469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mHandler.sendMessageDelayed(mHandler.obtainMessage(DEVICE_MEMORY_WHAT, 2479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project clearCache ?_TRUE : _FALSE, 0), 2489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project delay); 2499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2503161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker 2519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 2523161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker * just query settings to retrieve the memory threshold. 2539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Preferred this over using a ContentObserver since Settings.Gservices caches the value 2549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * any way 2559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private long getMemThreshold() { 2579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int value = Settings.Gservices.getInt( 2583161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker mContentResolver, 2593161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker Settings.Gservices.SYS_STORAGE_THRESHOLD_PERCENTAGE, 2609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project DEFAULT_THRESHOLD_PERCENTAGE); 2619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if(localLOGV) Log.v(TAG, "Threshold Percentage="+value); 2629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //evaluate threshold value 2639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mTotalMemory*value; 2649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Constructor to run service. initializes the disk space threshold value 2689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * and posts an empty message to kickstart the process. 2699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public DeviceStorageMonitorService(Context context) { 2719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLastReportedFreeMemTime = 0; 2729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mContext = context; 2739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mContentResolver = mContext.getContentResolver(); 2749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //create StatFs object 2753161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker mDataFileStats = new StatFs(DATA_PATH); 2763161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker mSystemFileStats = new StatFs(SYSTEM_PATH); 2773161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker mCacheFileStats = new StatFs(CACHE_PATH); 2789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //initialize total storage on device 2793161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker mTotalMemory = ((long)mDataFileStats.getBlockCount() * 2803161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker mDataFileStats.getBlockSize())/100L; 2819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mStorageLowIntent = new Intent(Intent.ACTION_DEVICE_STORAGE_LOW); 2829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mStorageOkIntent = new Intent(Intent.ACTION_DEVICE_STORAGE_OK); 2839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkMemory(true); 2849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2853161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker 2869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This method sends a notification to NotificationManager to display 2899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * an error dialog indicating low disk space and launch the Installer 2909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * application 2919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final void sendNotification() { 2939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if(localLOGV) Log.i(TAG, "Sending low memory notification"); 2949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //log the event to event log with the amount of free storage(in bytes) left on the device 2959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project EventLog.writeEvent(EVENT_LOG_LOW_STORAGE_NOTIFICATION, mFreeMem); 2969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Pack up the values and broadcast them to everyone 2979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Intent lowMemIntent = new Intent(Intent.ACTION_MANAGE_PACKAGE_STORAGE); 2989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project lowMemIntent.putExtra("memory", mFreeMem); 2999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project lowMemIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 3003161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker NotificationManager mNotificationMgr = 3019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (NotificationManager)mContext.getSystemService( 3029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Context.NOTIFICATION_SERVICE); 3039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project CharSequence title = mContext.getText( 3049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project com.android.internal.R.string.low_internal_storage_view_title); 3059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project CharSequence details = mContext.getText( 3069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project com.android.internal.R.string.low_internal_storage_view_text); 3079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project PendingIntent intent = PendingIntent.getActivity(mContext, 0, lowMemIntent, 0); 3089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Notification notification = new Notification(); 3099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project notification.icon = com.android.internal.R.drawable.stat_notify_disk_full; 3109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project notification.tickerText = title; 3119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project notification.flags |= Notification.FLAG_NO_CLEAR; 3129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project notification.setLatestEventInfo(mContext, title, details, intent); 3139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mNotificationMgr.notify(LOW_MEMORY_NOTIFICATION_ID, notification); 3149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mContext.sendStickyBroadcast(mStorageLowIntent); 3159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Cancels low storage notification and sends OK intent. 3199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final void cancelNotification() { 3219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if(localLOGV) Log.i(TAG, "Canceling low memory notification"); 3229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project NotificationManager mNotificationMgr = 3239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (NotificationManager)mContext.getSystemService( 3249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Context.NOTIFICATION_SERVICE); 3259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //cancel notification since memory has been freed 3269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mNotificationMgr.cancel(LOW_MEMORY_NOTIFICATION_ID); 3279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mContext.removeStickyBroadcast(mStorageLowIntent); 3299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mContext.sendBroadcast(mStorageOkIntent); 3309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3313161795b2353171bb0636fb3ea6dab7dec80a4f4Doug Zongker 3329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void updateMemory() { 3339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int callingUid = getCallingUid(); 3349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if(callingUid != Process.SYSTEM_UID) { 3359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 3369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // force an early check 3389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project postCheckMemoryMsg(true, 0); 3399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 341