Android device memory and SD card Operation Tool Class

Package Cc.c;import Java.io.file;import Java.util.list;import android.os.statfs;import java.io.FileReader;import Java.io.ioexception;import Java.io.bufferedreader;import Android.os.environment;import Android.content.Context; Import Android.app.activitymanager;import Android.app.activitymanager.memoryinfo;import Android.app.activitymanager.runningappprocessinfo;public class Storageutil {private static final int ERROR = -1;public static int save_dir = 1;//Determine if SD card is installed public static Boolean issdcardexist () {return Android.os.Environment.getExternalStorageState (). Equals (Android.os.Environment.MEDIA_MOUNTED);} Memory Cleanup//Note permissions://<uses-permission android:name= "Android.permission.KILL_BACKGROUND_PROCESSES"/>public static void Cleanmemory (Context context) {SYSTEM.OUT.PRINTLN ("---> Pre-Clean memory available:" +getavailmemory (context) + "MB"); Activitymanager activitymanager= (Activitymanager) Context.getsystemservice (Context.activity_service); Runningappprocessinfo Runningappprocessinfo=null; List<runningappprocessInfo> runningappprocessinfolist= activitymanager.getrunningappprocesses ();//list< Activitymanager.runningserviceinfo> Serviceinfos = mactivitymanager.getrunningservices, if ( Runningappprocessinfolist! = null) {for (int i = 0; i < runningappprocessinfolist.size (); ++i) {runningappprocessinfo= Runningappprocessinfolist.get (i);//a process with a general value greater than runningappprocessinfo.importance_service//is an unused process for a long time or an empty process/ A process with a general value greater than runningappprocessinfo.importance_visible//is a non-visible process that runs if in the background (Runningappprocessinfo.importance > runningappprocessinfo.importance_visible) {string[] pkgList = runningappprocessinfo.pkglist;for (int j = 0; J < PkgLis T.length; ++J) {System.out.println ("===> is cleaning up:" +pkglist[j]); Activitymanager.killbackgroundprocesses (Pkglist[j]);}}} SYSTEM.OUT.PRINTLN ("---> Free memory after clean up:" +getavailmemory (context) + "MB");} Gets the total memory size public static long Gettotalmemory () {//System memory information file string FilePath = "/proc/meminfo"; String lineString; string[] Stringarray;long totalmemory = 0;try {FileReader fIlereader = new FileReader (FilePath); BufferedReader BufferedReader = new BufferedReader (filereader,1024 * 8);//Read Meminfo first line, get total system memory size linestring = Bufferedreader.readline ();//Split Stringarray = Linestring.split ("\\s+") by space;//Get Total system memory, Unit Kbtotalmemory = Integer.valueof (Stringarray[1]). Intvalue (); Bufferedreader.close (); catch (IOException e) {}return totalmemory/1024;} Get available memory size public static long getavailmemory (context context) {Activitymanager activitymanager= (Activitymanager) Context.getsystemservice (Context.activity_service); Memoryinfo memoryinfo = new Memoryinfo () Activitymanager.getmemoryinfo (memoryinfo); return memoryinfo.availmem/(1024 * 1024);} SD Card remaining space public static long Getavailableexternalmemorysize () {if (Issdcardexist ()) {File Path = Environment.getexternalstoragedirectory (); StatFs stat = new StatFs (Path.getpath ()); Long blockSize = Stat.getblocksize (); Long availableblocks = Stat.getavailableblocks (); return availableblocks * blockSize;} else {return ERROR;}} SD Card Total Space public staticLong Gettotalexternalmemorysize () {if (Issdcardexist ()) {File path = Environment.getexternalstoragedirectory (); StatFs stat = new StatFs (Path.getpath ()); Long blockSize = Stat.getblocksize (); Long totalblocks = Stat.getblockcount (); return totalblocks * blockSize;} else {return ERROR;}} Determine the total size of the EXTERNAL_SD folder under the SD card public static long Gettotalexternal_sdmemorysize () {if (Issdcardexist ()) {File Path = Environment.getexternalstoragedirectory (); File EXTERNALSD = new file (Path.getpath () + "/EXTERNAL_SD"); if (externalsd.exists () && externalsd.isdirectory () {StatFs stat = new StatFs (Path.getpath () + "/EXTERNAL_SD"); Long blockSize = Stat.getblocksize (); Long totalblocks = Stat. Getblockcount (); if (Gettotalexternalmemorysize ()! = -1&& Gettotalexternalmemorysize ()! = totalBlocks* BlockSize) {return totalblocks * blockSize;} else {return ERROR;}} else {return ERROR;}} else {return ERROR;}} Determine the available size of the EXTERNAL_SD folder under the SD card public static long Getavailableexternal_sdmemorysize () {if (Issdcardexist ()) {File path = Environment.getexternalstoragedirectory (); File EXTERNALSD = new file (Path.getpath () + "/EXTERNAL_SD"); if (externalsd.exists () && externalsd.isdirectory () {StatFs stat = new StatFs (Path.getpath () + "/EXTERNAL_SD"); Long blockSize = Stat.getblocksize (); Long availableblocks = s Tat.getavailableblocks (); if (Getavailableexternalmemorysize ()! = -1&& Getavailableexternalmemorysize ()! = availableblocks* blockSize) {return availableblocks * blockSize;} else {return ERROR;}} else {return ERROR;}} else {return ERROR;}}}