DeviceStorageMonitorService.java revision 9066cfe9886ac131c34d59ed0e2d287b0e3c0087
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 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * (default is 10%. this value is a gservices parameter) a low memory notification is 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 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; 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private long mFreeMem; 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; 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int mBlkSize; 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long mTotalMemory; 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project StatFs mFileStats; 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final String DATA_PATH="/data"; 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long mThreadStartTime = -1; 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean mClearSucceeded = false; 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean mClearingCache; 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private Intent mStorageLowIntent; 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private Intent mStorageOkIntent; 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private CachePackageDataObserver mClearCacheObserver; 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int _TRUE = 1; 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int _FALSE = 0; 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This string is used for ServiceManager access to this class. 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static final String SERVICE = "devicestoragemonitor"; 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Handler that checks the amount of disk space on the device and sends a 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * notification if the device runs low on disk space 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Handler mHandler = new Handler() { 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void handleMessage(Message msg) { 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //dont handle an invalid message 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (msg.what != DEVICE_MEMORY_WHAT) { 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.e(TAG, "Will not process invalid message"); 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkMemory(msg.arg1 == _TRUE); 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project }; 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project class CachePackageDataObserver extends IPackageDataObserver.Stub { 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void onRemoveCompleted(String packageName, boolean succeeded) { 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mClearSucceeded = succeeded; 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mClearingCache = false; 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if(localLOGV) Log.i(TAG, " Clear succeeded:"+mClearSucceeded 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project +", mClearingCache:"+mClearingCache+" Forcing memory check"); 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project postCheckMemoryMsg(false, 0); 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final void restatDataDir() { 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFileStats.restat(DATA_PATH); 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFreeMem = mFileStats.getAvailableBlocks()*mBlkSize; 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Allow freemem to be overridden by debug.freemem for testing 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project String debugFreeMem = SystemProperties.get("debug.freemem"); 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!"".equals(debugFreeMem)) { 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFreeMem = Long.parseLong(debugFreeMem); 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Read the log interval from Gservices 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long freeMemLogInterval = Gservices.getLong(mContentResolver, 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Gservices.SYS_FREE_STORAGE_LOG_INTERVAL, 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project DEFAULT_FREE_STORAGE_LOG_INTERVAL_IN_MINUTES)*60*1000; 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //log the amount of free memory in event log 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long currTime = SystemClock.elapsedRealtime(); 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if((mLastReportedFreeMemTime == 0) || 1369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (currTime-mLastReportedFreeMemTime) >= freeMemLogInterval) { 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLastReportedFreeMemTime = currTime; 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project EventLog.writeEvent(EVENT_LOG_FREE_STORAGE_LEFT, mFreeMem); 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Read the reporting threshold from Gservices 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long threshold = Gservices.getLong(mContentResolver, 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Gservices.DISK_FREE_CHANGE_REPORTING_THRESHOLD, 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project DEFAULT_DISK_FREE_CHANGE_REPORTING_THRESHOLD); 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // If mFree changed significantly log the new value 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long delta = mFreeMem - mLastReportedFreeMem; 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (delta > threshold || delta < -threshold) { 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLastReportedFreeMem = mFreeMem; 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project EventLog.writeEvent(EVENT_LOG_STORAGE_BELOW_THRESHOLD, mFreeMem); 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final void clearCache() { 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mClearCacheObserver == null) { 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Lazy instantiation 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mClearCacheObserver = new CachePackageDataObserver(); 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mClearingCache = true; 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (localLOGV) Log.i(TAG, "Clearing cache"); 1609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project IPackageManager.Stub.asInterface(ServiceManager.getService("package")). 1619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project freeStorageAndNotify(getMemThreshold(), mClearCacheObserver); 1629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (RemoteException e) { 1639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.w(TAG, "Failed to get handle for PackageManger Exception: "+e); 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mClearingCache = false; 1659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mClearSucceeded = false; 1669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final void checkMemory(boolean checkCache) { 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //if the thread that was started to clear cache is still running do nothing till its 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //finished clearing cache. Ideally this flag could be modified by clearCache 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // and should be accessed via a lock but even if it does this test will fail now and 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //hopefully the next time this flag will be set to the correct value. 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if(mClearingCache) { 1759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if(localLOGV) Log.i(TAG, "Thread already running just skip"); 1769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //make sure the thread is not hung for too long 1779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long diffTime = System.currentTimeMillis() - mThreadStartTime; 1789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if(diffTime > (10*60*1000)) { 1799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.w(TAG, "Thread that clears cache file seems to run for ever"); 1809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 1829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project restatDataDir(); 1839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (localLOGV) Log.v(TAG, "freeMemory="+mFreeMem); 1849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //post intent to NotificationManager to display icon if necessary 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long memThreshold = getMemThreshold(); 1879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFreeMem < memThreshold) { 1889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mLowMemFlag) { 1899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (checkCache) { 1909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // See if clearing cache helps 1919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Note that clearing cache is asynchronous and so we do a 1929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // memory check again once the cache has been cleared. 1939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mThreadStartTime = System.currentTimeMillis(); 1949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mClearSucceeded = false; 1959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project clearCache(); 1969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 1979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.i(TAG, "Running low on memory. Sending notification"); 1989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sendNotification(); 1999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLowMemFlag = true; 2009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 2029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (localLOGV) Log.v(TAG, "Running low on memory " + 2039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "notification already sent. do nothing"); 2049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 2069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mLowMemFlag) { 2079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.i(TAG, "Memory available. Cancelling notification"); 2089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project cancelNotification(); 2099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLowMemFlag = false; 2109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if(localLOGV) Log.i(TAG, "Posting Message again"); 2149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //keep posting messages to itself periodically 2159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project postCheckMemoryMsg(true, DEFAULT_CHECK_INTERVAL); 2169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void postCheckMemoryMsg(boolean clearCache, long delay) { 2199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Remove queued messages 2209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mHandler.removeMessages(DEVICE_MEMORY_WHAT); 2219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mHandler.sendMessageDelayed(mHandler.obtainMessage(DEVICE_MEMORY_WHAT, 2229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project clearCache ?_TRUE : _FALSE, 0), 2239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project delay); 2249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 2279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * just query settings to retrieve the memory threshold. 2289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Preferred this over using a ContentObserver since Settings.Gservices caches the value 2299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * any way 2309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private long getMemThreshold() { 2329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int value = Settings.Gservices.getInt( 2339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mContentResolver, 2349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Settings.Gservices.SYS_STORAGE_THRESHOLD_PERCENTAGE, 2359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project DEFAULT_THRESHOLD_PERCENTAGE); 2369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if(localLOGV) Log.v(TAG, "Threshold Percentage="+value); 2379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //evaluate threshold value 2389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mTotalMemory*value; 2399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Constructor to run service. initializes the disk space threshold value 2439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * and posts an empty message to kickstart the process. 2449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public DeviceStorageMonitorService(Context context) { 2469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLastReportedFreeMemTime = 0; 2479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mContext = context; 2489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mContentResolver = mContext.getContentResolver(); 2499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //create StatFs object 2509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFileStats = new StatFs(DATA_PATH); 2519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //initialize block size 2529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mBlkSize = mFileStats.getBlockSize(); 2539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //initialize total storage on device 2549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTotalMemory = (mFileStats.getBlockCount()*mBlkSize)/100; 2559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mStorageLowIntent = new Intent(Intent.ACTION_DEVICE_STORAGE_LOW); 2569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mStorageOkIntent = new Intent(Intent.ACTION_DEVICE_STORAGE_OK); 2579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkMemory(true); 2589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This method sends a notification to NotificationManager to display 2639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * an error dialog indicating low disk space and launch the Installer 2649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * application 2659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final void sendNotification() { 2679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if(localLOGV) Log.i(TAG, "Sending low memory notification"); 2689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //log the event to event log with the amount of free storage(in bytes) left on the device 2699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project EventLog.writeEvent(EVENT_LOG_LOW_STORAGE_NOTIFICATION, mFreeMem); 2709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Pack up the values and broadcast them to everyone 2719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Intent lowMemIntent = new Intent(Intent.ACTION_MANAGE_PACKAGE_STORAGE); 2729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project lowMemIntent.putExtra("memory", mFreeMem); 2739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project lowMemIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project NotificationManager mNotificationMgr = 2759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (NotificationManager)mContext.getSystemService( 2769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Context.NOTIFICATION_SERVICE); 2779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project CharSequence title = mContext.getText( 2789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project com.android.internal.R.string.low_internal_storage_view_title); 2799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project CharSequence details = mContext.getText( 2809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project com.android.internal.R.string.low_internal_storage_view_text); 2819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project PendingIntent intent = PendingIntent.getActivity(mContext, 0, lowMemIntent, 0); 2829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Notification notification = new Notification(); 2839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project notification.icon = com.android.internal.R.drawable.stat_notify_disk_full; 2849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project notification.tickerText = title; 2859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project notification.flags |= Notification.FLAG_NO_CLEAR; 2869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project notification.setLatestEventInfo(mContext, title, details, intent); 2879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mNotificationMgr.notify(LOW_MEMORY_NOTIFICATION_ID, notification); 2889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mContext.sendStickyBroadcast(mStorageLowIntent); 2899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Cancels low storage notification and sends OK intent. 2939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final void cancelNotification() { 2959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if(localLOGV) Log.i(TAG, "Canceling low memory notification"); 2969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project NotificationManager mNotificationMgr = 2979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (NotificationManager)mContext.getSystemService( 2989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Context.NOTIFICATION_SERVICE); 2999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //cancel notification since memory has been freed 3009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mNotificationMgr.cancel(LOW_MEMORY_NOTIFICATION_ID); 3019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mContext.removeStickyBroadcast(mStorageLowIntent); 3039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mContext.sendBroadcast(mStorageOkIntent); 3049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void updateMemory() { 3079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int callingUid = getCallingUid(); 3089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if(callingUid != Process.SYSTEM_UID) { 3099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 3109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // force an early check 3129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project postCheckMemoryMsg(true, 0); 3139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 315