android - start an activity after button click -

i want start activity once after application starts. did code:

boolean isfirstrun = getsharedpreferences("preference", mode_private)             .getboolean("isfirstrun", true);      if (isfirstrun) {         //show start activity          startactivity(new intent(mainactivity.this, firstlaunch.class));         toast.maketext(mainactivity.this, "first run", toast.length_long)                 .show();     }          getsharedpreferences("preference", mode_private).edit()                 .putboolean("isfirstrun", false).commit(); 

but didn't work thing want. want when click on button , launch activity. main activity launches

to start activity, need use intents. , can call when button clicked so:

button mybutton = (button) findviewbyid(r.id.my_button); mybutton.setonclicklistener(new view.onclicklistener() {     @override     public void onclick(view v) {        intent intent = new intent(currentactivity.class, nextactivity.class);        startactivity(intent);     } 

you can read more starting activities here.