this may help.
Create an intent with action=MAIN and category=LAUNCHER
Get the PackageManager from the current context using context.getPackageManager
packageManager.queryIntentActivity(, 0) where intent has category=LAUNCHER, action=MAIN or packageManager.resolveActivity(, 0) to get the first activity with main/launcher
Get the ActivityInfo you're interested in
From the ActivityInfo, get the packageName and name
Finally, create another intent with with category=LAUNCHER, action=MAIN, componentName = new ComponentName(packageName, name) and setFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
Finally, context.startActivity(newIntent)
I also found this
Dim Intent1 As Intent
Intent1.Initialize(Intent1.ACTION_MAIN, "")
Intent1.SetComponent("com.google.android.youtube/.HomeActivity")
StartActivity(Intent1)
I think if you find out the correct setCompent the 3rd line would change.
this should get you going in the right direction.