title: Android: Where is the constructor of AppCompatAcitivity?
body: <p>I'm a beginner in Kotlin (and Android for the matter) and I saw that the first opening line of the MainAcitivty class is:</p>
  
  <pre><code>class MainActivity : AppCompatActivity() {
  </code></pre>
  
  <p>The braces after AppCompatAcitivty mean that this class has a constructor right? I searched inside this class and didn't find any constructor, so where is the constructor of AppCompatActivity?</p>
  
  <p>Is it hidden in a super class that AppCompatActivity itself extends from? If so how can I track it?</p>
  
  <p>Thanks in advance</p>