How to clear task stack to finish all activity in android?

Intent i = new Intent(this MyActivity.class);
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
i.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);


startActivity(i);

       finish();


This code will close all the opened activities and start new activity as root one.