title: how to rotate a bitmap 90 degrees
body: <p>There is a statement in android <code>canvas.drawBitmap(visiblePage, 0, 0, paint);</code></p>
  
  <p>When I add <code>canvas.rotate(90)</code>, there is no effect. But if I write </p>
  
  <pre><code>canvas.rotate(90)
  canvas.drawBitmap(visiblePage, 0, 0, paint);
  </code></pre>
  
  <p>I get no bitmap drawn. So what am I not doing right?</p>