[android-developers] Implementations of Emoji (Emoticon) View/Keyboard Layouts

I am trying to figure out how the emoji (emoticon) selections are implemented on the Facebook app and the Google Hangouts app. I looked into the SoftKeyboard Demo app in the Android API Samples but the display of these emoji views does not look like a SoftKeyboard. It looks and behaves more like a custom Dialog view. Does anyone have an idea of how these are implemented?

Facebook App

Google Hangouts app

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