title: Getting a File's Last Modified Date
body: <p>I'm using this to see if a file already exists and get its timestamp:</p>
  
  <pre><code>File file = new File(getResources().getString(R.string.file_name));
  
  if (file.exists()) {
    Date lastModified = new Date(file.lastModified());
  }
  </code></pre>
  
  <p>Even though I can see that this file does indeed exist using the Context.fileList() method, the code above always says it doesn't.</p>
  
  <p>How can I get a file's last modified date?</p>