title: using Apache POI with Android
body: <p>I have a tried and tested code to get information from an Excel file. It works wonders in java. However, when I try to use it in Android, I get this:</p>
  
  <pre><code>11-30 13:26:24.339: I/dalvikvm(9762): Could not find method org.apache.commons.codec.digest.DigestUtils.md5, referenced from method org.apache.poi.hssf.usermodel.HSSFWorkbook.addPicture
  </code></pre>
  
  <p>So, when I try to read a row, it always returns null.</p>
  
  <p>How can I fix this problem?</p>