| TextToSpeech.OnInitListener | Called when the TTS has initialized. |
| TextToSpeech.OnUtteranceCompletedListener | Called when the TTS has completed saying something that has an utterance ID set. |
| TextToSpeech | Synthesizes speech from text for immediate playback or to create a sound file. |
| TextToSpeech.Engine | Internal constants for the TTS functionality |