title: How to flip a imageView in 45-degree in Android?
body: <p>I have known that </p>
  
  <pre><code>imageView.setRotationY(degree) 
  </code></pre>
  
  <p>can do a horizontal(0-degree) flip, and </p>
  
  <pre><code>imageView.setRotationX(degree) 
  </code></pre>
  
  <p>can do a vertical(90-degree) flip.</p>
  
  <p><strong>What if I want a 45-degree flip?</strong></p>
  
  <p>How to do it? </p>
  
  <p>Thanks for your help.</p>