java - Cannot cast from View to Button? -

recently have been attempting develop android app, hit large roadblock on. getting error "cannot cast view button" on line button lost = (button)findviewbyid(r.id.lost1); here xml part

 <button         android:id="@+id/lost1"         android:layout_width="fill_parent"         android:layout_height="230dp"         android:layout_alignparentleft="true"         android:layout_alignparenttop="true"         android:layout_gravity="top"         android:layout_weight="1"         android:text="@string/lost"         android:textcolor="@color/lostfoundtext"         android:textcolorlink="@color/white"         android:textsize="@dimen/abc_text_size_headline_material"         android:textstyle="bold|italic"         android:typeface="serif" />`