alarm dialog for turn on wifi

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http://stackoverflow.com – I am new in android programming. I searched on the internet but i can't find any solution, maybe for this i have not good english. anyway. When user clicked on the web link i want to show an alarm dialog to user that turn on wifi, and then user clicked on the OK button, wifi settings is shows. This is my TextView with link: <TextView android:id="@+id/sitename" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/site2" android:background="@color/white" android:layout_below="@id/address" android:layout_toLeftOf="@id/si (HowTos)