Opening compressed file attachments from GMail using Total Commander On a newly configured Android 9 tablet, I installed Total Commander which can open most of the known compressed file types (zip, tgz, etc). I want to open such a compressed attachment directly from the Gmail application without first saving it. However, when I tap to a zip attachment in a mail, only a list of other installed applications that can handle the zip file are shown, but not Total Commander. How can I add Total Commander to this list?
The Total Commander app can only work with saved ZIP files. This is defined in it's AndroidManifest.xml:

&lt;intent-filter&gt;
    &lt;action android:name="android.intent.action.VIEW"/&gt;
    &lt;data android:mimeType="application/zip" android:scheme="file"/&gt;
    &lt;category android:name="android.intent.category.DEFAULT"/&gt;
&lt;/intent-filter&gt;


As you can see there is only an entry for the file scheme, but no for the content scheme.

On Android users can not modify which app can handle what file format. Hence without a change by the author of Total Commands you can't do change this behavior on an unrooted device.