Apps Receive document from other app

[jonbanjo]

Looking at ES File Explorer, I notice there are 2 ways it can make a document available to another program. One is via the share mechanism and the other is more direct - click on a pdf for example and I get a list of applications I can use to open the document.

My printing app works with "share to" but how do I let other applications know that my app can open a pdf as well?

 

[jonbanjo]

I've found it. What I was looking for and somehow missed was

<action android:name="android.intent.action.VIEW" />