How to clear user data of your application programmatically? Here I share you my solution how to do this.
You also can clear your user data by clicking “Clear Data” button in Settings–>Applications–>Manage Aplications–> YOUR APPLICATION
To do it programmatically you need to remove user data from application dir.
Below you can download source code of sample Android project.
Pay attention in MyApplication class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 | 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 cache = getCacheDir(); File appDir = new File(cache.getParent()); if(appDir.exists()){ String[] children = appDir.list(); for(String s : children){ if(!s.equals("lib")){ deleteDir(new File(appDir, s)); Log.i("TAG", "File /data/data/APP_PACKAGE/" + s +" DELETED"); } } } } public static boolean deleteDir(File dir) { if (dir != null && dir.isDirectory()) { String[] children = dir.list(); for (int i = 0; i < children.length; i++) { boolean success = deleteDir(new File(dir, children[i])); if (!success) { return false; } } } return dir.delete(); } } |
Thanks for this informative post. I’m using Android and using “Clear Data” to clear user data. But programmatically option is new to me and I’ll try it on. 🙂
Oh this is sweet i know how to program a little bit. and this information will come in handy in the future.
Cool buddy!! I’m following exactly same way you describe to clear my Android user data. It’s really good and thanks for informative info.
I Was used this code in my personal code but data is not cleared properly some data is not cleared when i checked in settings->application->manage application->app_name.
Every time near about 4 kb data is remaining ,idon’t know why?
please help……………….
Hi, Gagan Singh dir?
Are your application store all data in /data/data/
I think it may happens if some of your app data stores in SD card.
Thanks , I’ve been looking for this exactly .
It comes very useful when performing clean-ups on Android JUnit Test.
Thanks again 😀
Hi Igor,
thank you for this very informative post. I was searching for a way to clear the app data programmatically and you give me the solution 😉
is there a way to clear the data programatically, but leave out shared preferences untouched? thanks in advance
Hi,
is there any way to clear other applications app data or uninstall app silently ….i dont want clear my current app data ,need to clear other app data…
Hi sreelal,
I think this is impossible to make clear data or remove other application without special permissions.
I know about some special relations between application which signed with same certificate.
very nice forum
thanks.
Dear is there need any special permission in manifist file? for clear data, cache
Very Good! I need this source… Thank you very very much!
it was many useful for me .
Thank a lot
What should you put in the asterisks? (**********)
Nothing. I’ve updated post for better understanding
Yes!. thank you very much
Thank you so much for this nice post. A question: Why must the class extend Application? An Explanation would be great!
Peter,
We need do it to use this class as Application class in the manifest. Please read docs from here: http://developer.android.com/reference/android/app/Application.html
how can we clear cache in api 23