title: Debug mode in a library
body: <p>I have an Android application with several "Log.d" calls along the code in order to following the events of the app.
  In order to enable or disable the debug messages I call the Log with</p>
  
  <pre><code> if (MyApp.debug) Log.d("Doing something");
  </code></pre>
  
  <p>Where MyApp.debug is a final boolean that I change before compiling.</p>
  
  <p>Now I want to use some classes from the application as a library for another app, so I copied them into a new library project. The problem is that now in the library I have no a MyApp class.</p>
  
  <p>How can I make something similar for controlling from the app if the library must print the debug messages or not?</p>
  
  <p>Thanks in advance</p>