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;

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

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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.

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Try putting those removal commands into onDestroy().