title: Make document read-only in Android
body: <p>I use below code to open .doc file by call other application.<br>
  But I don't want the file be modify.<br>
  So I want to set file to read only.<br>
  Or any other method to avoid user modify file.<br>
  The file format may *.doc, *.docx, *.ppt, *.pptx, *.pdf, *.txt.</p>
  
  <pre><code>File file = new File(FilePath);
  String mimetype = ".doc\tapplication/msword";
  Intent intent = new Intent(Intent.ACTION_VIEW);
  intent.setDataAndType(Uri.fromFile(file), mimetype);
  intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
  </code></pre>