SharedPreference Remove when we exit the application

I want to remove sharedPreference details;I did like this, but not working:

SharedPreferences  myRoutes = this.getSharedPreferences("myDefalutRoute", MODE_PRIVATE);
public void onExitAction(View botton){
    Intent startMain = new Intent(Intent.ACTION_MAIN);
    startMain.addCategory(Inten开发者_高级运维t.CATEGORY_HOME);
    startMain.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    startActivity(startMain);
    finish();    

    SharedPreferences myPrefs = this.getSharedPreferences("myLogedPrefs",MODE_WORLD_READABLE);
    myPrefs.edit().remove("myLogedPrefs");
    myPrefs.edit().clear(); 
    myPrefs.edit().commit();

    myRoutes.edit().remove("myDefalutRoute");
    myRoutes.edit().clear(); 
    myRoutes.edit().commit();

    moveTaskToBack(true);

}

After exit the application & go to data\data\package\myLogedPrefs.xml contain values.

How we can remove the SharedPreferences data?

Please help me..

Thanks in advance;

@override
public void onDestroy()
{
    super.onDestroy();
    SharedPreferences myPrefs = this.getSharedPreferences("myfile",MODE_WORLD_READABLE);
    myPrefs.edit().remove("myfile");
    myPrefs.edit().clear(); 
    myPrefs.edit().commit();    
}

Are you sure onExitAction() is being called? Where are you calling it from. Put in some logging to make sure it's being called. And as J_Andr mentioned, you probably want to move this code or call the function from the onDestroy method of the initial Activity of the application.

Try putting those removal commands into onDestroy().