How can I dynamically add new icons to Android's main menu grid from Java?

I have an application that I'd like to have multiple icons in the launcher's开发者_如何学JAVA main menu grid but only under certain conditions. For instance, I want to show icon A and icon B but only if the phone is running Android 2.2 because icon B uses a Froyo feature, so I don't want icon B showing up if on a pre-Froyo device.

Is there a way in Java to programmatically add the main menu icon? I don't want it in the manifest file as this isn't flexible at run time... at least not as far as I am aware. This would allow me to either check for some functionality, API, user preference, or a flag in the app.

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What about declaring both activities in the manifest, but then enabling / disabling them as needed using PackageManager.setComponentEnabledSetting()?

Good luck

Tom

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I'm not aware of a way to change that at runtime. You could either release two versions of the app, one for pre-froyo and one for after if they are sufficiently different, or check out this article on various ways to do backward compatability within a single app.