title: Camera.getParameters().getSupportedPreviewSizes() return is NULL in Emulator
body: <p>I have a problem with Camera and Android Version.
  I try to get preview size supported by Android Camera flow as below :</p>
  
  <pre><code>@Override
  public void surfaceCreated(SurfaceHolder holder) {
      // TODO Auto-generated method stub
      mCamera = Camera.open();
      mSupportedPreviewSizes = mCamera.getParameters()
              .getSupportedPreviewSizes();
      try {
          mCamera.setPreviewDisplay(holder);
      } catch (IOException exception) {
          mCamera.release();
          mCamera = null;
      }
  }
  </code></pre>
  
  <p>I try to test my code on 2 Android Version with Emulator ( Android 2.2 SDK &amp;&amp; Android 2.1 SDK )
  Configuration for both of version Android in Emulator as below:</p>
  
  <pre><code>Skin : HVGA
  Abstracted LCD density : 160
  </code></pre>
  
  <p>My problem : 
  When I run my Apps on Emulator - 2.2 SDK  : OK -- GOOD
  but when I run on Emulator - 2.1 SDK : have a problem " mCamera.getParameters().getSupportedPreviewSizes() return is NULL "</p>
  
  <p>If you known that, please help me !
  Thank you very very very ..........much....</p>