Is it possible to run (and view) two apps simultaneously?

问题

I have some questions about android development. I have googled around, but cannot seem to find any answers to my questions.

1. Is it possible to display google maps in a widget?
2. Is it possible to run (and view) two apps simultaneously?
3. Is it possible to run an App within an App?

回答1:

1. Is it possible to display google maps in a widget? Yes
2. Is it possible to run (and view) two apps simultaneously? No
3. Is it possible to run an App within an App? You can launch an app, from another app. But you can't run an app inside another. Well... you could try playing with an ActivityGroup and get a View reference of the inner app you want to run, and then render that View... but I think it is nonsense

来源：https://stackoverflow.com/questions/4088263/is-it-possible-to-run-and-view-two-apps-simultaneously