title: Android Studio Emulator does not show text as expected
body: <p>I am using Android Studio to learn android development. As you can see in the picture, I changed the original text"Hello world!" to "Hi!" and the change shows up on Preview(on the right side of the Android Studio) but not the emulator(I used Nexus 6). Does anyone know how to solve this problem?</p>
  
  <p><a href="https://i.stack.imgur.com/6kVla.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/6kVla.png" alt="enter image description here"></a></p>