title: TextView's text disappearing when device rotated
body: <p>I am writing a phone dialer app for android. I created a layout for keypad, which contains a TextView and 10 buttons. Buttons are as keys for 10 digits(0 to 9) and TextView is for displaying the number according to keys pressed.</p>
  
  <p>In my app, i am appending the text ("0" or "1", etc.) to the TextView for each button pressed. If i pressed the <strong>buttons 1, 2, 3</strong> then the <strong>text on TextView is 123</strong>.
  The problem is, <strong>let's take the screen is in landscape mode and TextView contains 123, if i turn it, in portrait mode no text on TextView.</strong></p>
  
  <p>Please Help Me Regarding this.</p>