title: Disable Android Studio warning: "Access can be ..."
body: <p>After an update of Android Studio I get warnings on fields like:</p>
  
  <pre><code>public int ex1 = 0;
  int ex2 = 0;
  </code></pre>
  
  <p>or methods or nested classes
  when they are used only in one class or in the package:</p>
  
  <p>"Access can be private" or "Access can be package-only"</p>
  
  <p>This is can be, and I don't want these warnings but I cannot find how I can deactivate them. Any ideas?</p>