how to start new activity using button in android studio -

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this question has answer here:

kindly explain, why not working? 

b3.setonclicklistener(new view.onclicklistener() {     @override     public void onclick(view v) {         intent intent = new intent(this, signup.class);         startactivity(intent);                     } });

signup word giving error in line given below.

intent intent = new intent(this, signup.class);

if current activity called main use:

intent intent = new intent(main.this, signup.class);

when put this, this reference of onclicklistener object.


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