title: How to change the Font Size in a whole Application programmatically, Android?
body: <p>I have created Spinner with the list of Font Sizes from "8" to "46" . I could be able to click the font Size and in a spinner it has shown me . </p>
  
  <p>My need is, if i click the Font Size "26" inside a Spinner then it should be applied to my whole project. Like applying to my Screen, Textview appearance, Edittext - Bold/ Italic, etc. Again if i click 46 size then it should be apply to my whole project.</p>
  
  <p>How could i do this by programmatically ?</p>