Starting Dropbox app with Activity Starter

I cannot seem to find an easy way to get the activity class and package for Dropbox.

I just want my app to start the Dropbox app on my phone.  

Are these available?

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see here how to find it out yourself

Using the Activity Starter 

also this app might help

App Inventor Activity Starter App with more than 100 examples of activities
App Inventor ActivityStarter

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The Activity Starter app got me almost there.

See pic.

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I just need to start the app, nothing else.

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Thanks.

The Activity Starter App got me closer, but not quite close enough.

I only want to open the app, nothing else.

There are lots of examples of how to put things and get things from your DropBox acct., but how to just open it?

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Got it.  Dropbox support actually helped me.

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They did say it is unpublished and may change so use at your own risk.

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