How to programmatically clear application data

Question

I am developing automated tests for an android application  using Robotium   In order to ensure the consistency and reliability of tests  I would like to start each test with clean state  of the application under test   In order to do so  I need to clear the app data  This can be done manually in Settings Applications Manage Applications  My App  Clear data  What is the recommended way to get this done programmatically

User · Answer

This way added by Sebastiano was OK  but it s necessary  when you run tests from i e  IntelliJ IDE to add   try          clearing app data     Runtime runtime   Runtime getRuntime        runtime exec  quot adb shell pm clear YOUR APP PACKAGE GOES HERE quot        instead of only  quot pm package    quot  and more important  add it before driver setCapability App package  package name

User · Answer

Using Context We can clear app specific files like preference database file   I have used below code for UI testing using Espresso        Rule     public ActivityTestRule lt HomeActivity gt  mActivityRule   new ActivityTestRule lt  gt               HomeActivity class        public static void clearAppInfo             Activity mActivity   testRule getActivity            SharedPreferences prefs                   PreferenceManager getDefaultSharedPreferences mActivity           prefs edit   clear   commit            mActivity deleteDatabase  app db name db

User · Answer

you can clear SharedPreferences app-data with this  Editor editor    context getSharedPreferences PREF FILE NAME  Context MODE PRIVATE  edit    editor clear    editor commit      and for clearing app db  this answer is correct -  Clearing Application database

User · Answer

Following up to  edovino s answer  the way of clearing all of an application s preferences programmatically would be  private void clearPreferences         try              clearing app data         Runtime runtime   Runtime getRuntime            runtime exec  pm clear YOUR APP PACKAGE GOES HERE           catch  Exception e            e printStackTrace              Warning  the application will force close

User · Answer

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   This will remove the data completely as well as force close the app

User · Answer

From API version 19 it is possible to call ActivityManager clearApplicationUserData       ActivityManager  context getSystemService Context ACTIVITY SERVICE   clearApplicationUserData

User · Answer

This solution has really helped me    By using below two methods we can clear data programatically      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

User · Answer

if android version is above kitkat you may use this as well  public void onClick View view         Context context   getApplicationContext       add this line     if  Build VERSION CODES KITKAT  lt   Build VERSION SDK INT              ActivityManager  context getSystemService ACTIVITY SERVICE                clearApplicationUserData            return

User · Answer

You can use the package-manager tool to clear data for installed apps  similar to pressing the  clear data  button in the app settings on your device   So using adb you could do   adb shell pm clear my wonderful app package

User · Answer

Check this code to    Override protected void onDestroy        closing Entire Application     android os Process killProcess android os Process myPid         Editor editor   getSharedPreferences  clear cache   Context MODE PRIVATE  edit        editor clear        editor commit        trimCache this       super onDestroy        public static void trimCache Context context        try           File dir   context getCacheDir            if  dir    null  amp  amp  dir isDirectory                  deleteDir dir                    catch  Exception e               TODO  handle exception           public static boolean deleteDir File dir        if  dir    null  amp  amp  dir isDirectory              String   children   dir list            for  int i   0  i  lt  children length  i                  boolean success   deleteDir new File dir  children i                 if   success                    return false                                         lt uses-permission        android name  android permission CLEAR APP CACHE  gt  lt  uses-permission gt         The directory is now empty so delete it      return dir delete

User · Answer

What is the recommended way to get this done programmatically    The only possible option is to run ADB command adb shell pm clear package before the test  The biggest problem is that it s kind of headache combining tests execution and shell commands    However  we  at Mediafe  came with some solution that can work for you on regular unrooted device  All you need to do is to add an annotation  All the rest is done by running simple bash script   Just add  ClearData annotation before ANY of your tests and tada   ADB clear command will be executed before the test execution    This is an example of such test    Test  ClearData public void someTest            your test     The idea is as follows   Read all tests by using adb shell am instrument -e log true Build execution plan by parsing the output from  1  Run the execution plan line by line   Using the same idea these are all options you can easily support     Clear data  Clear notification bar Parameterize Filter and run by tags   Use only annotations  Like this    Test  ClearData  Tags tags     sanity    medium     Parameterized Repeat count   3  public void myTest   throws Exception       String param   params index                  Bonus   For each failed test    Collect Logcat   stacktrace Record video  mp4  Dump DB  sqlite  Dump default shared preferences  xml  Collect dumpsys files like  battery  netstats and other    In general  it s easy to add more options  since the tests are executed one by one from bash script rather than from gradle task    The full blog post  https   medium com medisafe-tech-blog running-android-ui-tests-53e85e5c8da8   The source code with examples  https   github com medisafe run-android-tests  Hope this answers 6 years question

User · Answer

If you have just a couple of shared preferences to clear  then this solution is much nicer    Override protected void setUp   throws Exception       super setUp        Instrumentation instrumentation   getInstrumentation        SharedPreferences preferences   instrumentation getTargetContext   getSharedPreferences       Context MODE PRIVATE       preferences edit   clear   commit        solo   new Solo instrumentation  getActivity

[android] How to programmatically clear application data

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