How to communicate between tabhost and new actvities

I just encountered a problem in my android application. There are five tabs in my tabhost, which can hold five activities. If o开发者_运维百科ne of them jumps to another activity (not in tabhost), the tabhost is missing, but I want all of my activities to display in tabhost.

How can I do this and how do I get/put data between two activities in tabhost?

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You could use an ActivityGroup inside your TabHost to achieve this (i.e. the content shown for an individual tab is an ActivityGroup)