title: What does this(context, 0) mean AlertDialog source code
body: <p>I am learning the Android framework and wanted to create my own custom Dialog that allows me to pick a Date and Time at the same time. I am looking at the AlertDialog source code and the constructor calls the method this(context, 0). I am usually confused with the "this" reference. And am unsure of what it means here when called as a method.</p>
  
  <p>Link to source: <a href="https://android.googlesource.com/platform/frameworks/base/+/master/core/java/android/app/AlertDialog.java" rel="nofollow">https://android.googlesource.com/platform/frameworks/base/+/master/core/java/android/app/AlertDialog.java</a></p>
  
  <pre><code>protected AlertDialog(Context context) {
      this(context, 0);
  }
  </code></pre>