title: Best way to keep constants in android
body: <p>what is the best way in android to store constants to be consumed in java classes.
  From what I know there are two ways:</p>
  
  <ol>
  <li>res/strings</li>
  <li>Creating an interface</li>
  </ol>
  
  <p>from what I learned I think creating interface is not a safe practice. Am not sure if res/strings safe. Can someone let me know which is the safe and easy way to put application constants safely in android that can be consumed by other java classes in the same application.</p>