Android : Button click event not fire properly in

I have three XML files are

1) Header 2) FirstActivity 3) SecondActivity.

I add Header file in 1st and 2nd activity using < include /> tag.

There are two button in header file, which I want to use as navigate from one intent to another.

But I got ERROR every time …

ERROR/AndroidRuntime(328): java.lang.IllegalStateException: Could not find a method first1

(View) in the activity class com.contactDetails.ContactDetailsActivity for onClick handler on view class

android.widget.Button with id 'button1'