android - how to disable the previous activity when click on the next activity -

i having multiple activity in program flow of mainactivity-loginactivity-nextloginactivity etc.,i applying transparency theme on each activity except main activity want when click activity should show mainactivity in background rather previous activity.

maybe want result below?

you open app, app these activity in order: mainactivity -> loginactivity -> otheractivity

and want click button in otheractivity, don't want return loginactivity mainactivity

if is, can this:

button.setonclicklistener(new onclicklistener() { @override public void onclick(view v) {         intent intent = new intent(this, mainactivity.class);         intent.setflags(intent.flag_activity_clear_top);         startactivity(intent);     } }); 

in line: intent.setflags(intent.flag_activity_clear_top);

activity use launch mode singletask.

if activity stack has mainactivity, finish other activity on top of mainactivity, return mainactivity.