Clear Application s Data Programmatically

Question

I want to clear my application s data programmatically    Application s data may contain anything like databases  shared preferences  Internal-External files or any other files created within the application   I know we can clear data in the mobile device through      Settings- Applications-  ManageApplications-  My application- Clear   Data   But I need to do the above thing through an Android Program

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If you want a less verbose hack   void deleteDirectory String path      Runtime getRuntime   exec String format  rm -rf  s   path

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There s a new API introduced in API 19  KitKat   ActivityManager clearApplicationUserData     I highly recommend using it in new applications   import android os Build    if  VERSION CODES KITKAT  lt   VERSION SDK INT          ActivityManager context getSystemService ACTIVITY SERVICE                clearApplicationUserData       note  it has a return value    else          use old hacky way  which can be removed        once minSdkVersion goes above 19 in a few years      If you don t want the hacky way you can also hide the button on the UI  so that functionality is just not available on old phones   Knowledge of this method is mandatory for anyone using android manageSpaceActivity     Whenever I use this  I do so from a manageSpaceActivity which has android process   manager   There  I manually kill any other processes of my app  This allows me to let a UI stay running and let the user decide where to go next   private static void killProcessesAround Activity activity  throws NameNotFoundException       ActivityManager am    ActivityManager activity getSystemService Context ACTIVITY SERVICE       String myProcessPrefix   activity getApplicationInfo   processName      String myProcessName   activity getPackageManager   getActivityInfo activity getComponentName    0  processName      for  ActivityManager RunningAppProcessInfo proc   am getRunningAppProcesses              if  proc processName startsWith myProcessPrefix   amp  amp   proc processName equals myProcessName                 android os Process killProcess proc pid

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What I use everywhere      Runtime getRuntime   exec  pm clear me myapp         Executing above piece of code closes application and removes all databases and shared preferences

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The Simplest way to do this is   private void deleteAppData          try          clearing app data     String packageName   getApplicationContext   getPackageName        Runtime runtime   Runtime getRuntime        runtime exec  pm clear   packageName      catch  Exception e        e printStackTrace          This will clear the data and remove your app from memory  It is equivalent to clear data option under  Settings --  Application Manager --  Your App --  Clear data

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Try this code private void clearAppData         try           if  Build VERSION CODES KITKAT  lt   Build VERSION SDK INT                  ActivityManager getSystemService ACTIVITY SERVICE   clearApplicationUserData              else               Runtime getRuntime   exec  quot pm clear  quot    getApplicationContext   getPackageName                     catch  Exception e            e printStackTrace

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combine code from 2 answers    https   stackoverflow com a 42228794 1815624 https   stackoverflow com a 29197259 1815624   Here is the resulting combined source based answer  private void clearAppData         try              clearing app data         if  Build VERSION CODES KITKAT  lt   Build VERSION SDK INT                  ActivityManager getSystemService ACTIVITY SERVICE   clearApplicationUserData       note  it has a return value            else               String packageName   getApplicationContext   getPackageName                Runtime runtime   Runtime getRuntime                runtime exec  pm clear   packageName                    catch  Exception e            e printStackTrace

User · Answer

I m just putting the tutorial from the link ihrupin posted here in this post   package com hrupin cleaner   import java io File   import android app Application  import android util Log   public class MyApplication extends Application        private static MyApplication instance        Override     public void onCreate             super onCreate            instance   this             public static MyApplication getInstance             return instance             public void clearApplicationData             File cacheDirectory   getCacheDir            File applicationDirectory   new File cacheDirectory getParent             if  applicationDirectory exists                  String   fileNames   applicationDirectory list                for  String fileName   fileNames                    if   fileName equals  lib                          deleteFile new File applicationDirectory  fileName                                                         public static boolean deleteFile File file            boolean deletedAll   true          if  file    null                if  file isDirectory                      String   children   file list                    for  int i   0  i  lt  children length  i                          deletedAll   deleteFile new File file  children i     amp  amp  deletedAll                                  else                   deletedAll   file delete                                     return deletedAll            So if you want a button to do this you need to call MyApplication getInstance    clearApplicationData   from within an onClickListener  Update  Your SharedPreferences instance might hold onto your data and recreate the preferences file after you delete it  So your going to want to get your SharedPreferences object and   prefs edit   clear   commit      Update   You need to add android name  your package MyApplication  to the application tag inside AndroidManifest xml if you had not done so  Else  MyApplication getInstance   returns null  resulting a NullPointerException

[android] Clear Application's Data Programmatically

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