Can an Android app install another android app?

Question

I was wondering if it was possible to have an android app which is already installed go and download another app and install it? I figure there could be security problems wi

Answer 1

If the answer is NO. Then i wonder how facebook installs "Messenger" Application along with the "Facebook for Android" application?

If i'm not wrong, "Messenger" is also a different application from Main Facebook app.

Facebook For Android App will not ask to install Messenger App when we want to chat thru facebook app. It is already installed with facebook.

You can also install/uninstall Messenger application separately.

I may be wrong. I dont have complete information, but looking at the process and on applying little bit of logic i think we can install android application from another application. But how i'm too learning and looking for it .

So how must they have done it? Please correct me if i'm wrong.