public void onclicklistener(View tager) {
	Intent intent = new Intent();
	intent.setClass(Activity02.this, OtherActivity.class);
	Activity02.this.startActivity(intent);
}

<Button
	android:id = "@+id/myButton"
	android:onClick="onclicklistener"
	android:layout_width ="fill_parent"
	android:layout_height = "wrap_content" />