title: Unlock APK files in Android Studio for editing
body: <p>Newbie here!</p>
  <p>I have downloaded the .apk to Android Studio to make some changes to the code. I want to add a requirement for a user to insert 'a memorable word' when they register. But when I try and edit the required file, I just get an alert box telling the file is read only. I have tried to alter this in the panel but to no effect. It is possible the previous developer locked the files. How do I go about editing from this point forward, if the developer has locked the files, on which file/folder do I alter to make the files editable.</p>