title: ProGuard doesn't generate mapping file
body: <p>I have read multiple threads on SO but couldn't find any answer. I have multiple questions here. Let me describe:</p>
  
  <ul>
  <li>I don't know much about ProGuard but according to my information, it obfuscates the Android code to some extent. My question is Do I need to enable it somewhere? <code>minifyEnabled</code> is <code>false</code> in my Gradle file. Does this disable ProGuard completely?</li>
  <li>To deobfuscate the crash on Firebase and get stack trace, I need the mapping file. I can't find it anywhere. In app/build/outputs folder, I only have</li>
  </ul>
  
  <p><a href="https://i.stack.imgur.com/Nsdd6.png" rel="noreferrer"><img src="https://i.stack.imgur.com/Nsdd6.png" alt="Folder"></a></p>
  
  <p>Then I read somewhere about <code>proguard-rules.pro</code> file. It just had some comments and no code. Then I put this in it: <code>-printmapping mapping.txt</code>. Then generated signed APK again, still no success. What am I missing?</p>
  
  <p>Edit 1: If I have to execute some adb terminal command, please describe steps. I have never used Terminal before.</p>