File Type Association doesn't work on Android ?

<filename>programName</filename>
<fileTypes>
 <fileType>
  <contentType>text/plain</contentType>
  <description>File Text</description>
  <extension>txt</extension>
  <icon>
  <image128x128>icons/txt_icon_128.png</image128x128>
  <image48x48>icons/txt_icon_48.png</image48x48>
  <image32x32>icons/txt_icon_32.png</image32x32>
  <image16x16>icons/nle_icon_16.png</image16x16> 
  </icon>
  <name>programName.txt</name>
 </fileType>
</fileTypes>

File Type Association doesn't work on Android, when I want to open a text file, my application does not appear in the list.

Thanks.