title: Google Vision API Samples: Get the CameraSource to Focus
body: <p>I have checkout out the latest Google Vision APIs from here:</p>
  
  <p><a href="https://github.com/googlesamples/android-vision" rel="noreferrer">https://github.com/googlesamples/android-vision</a></p>
  
  <p>And I am running it on a LG G2 device with KitKat. The only change I have made is to the minSdkVerion in the Gradle file:</p>
  
  <pre><code>...
  defaultConfig {
      applicationId "com.google.android.gms.samples.vision.face.multitracker"
      minSdkVersion 19
  ...
  </code></pre>
  
  <p>However it does not focus. How do I make it focus?</p>