| SynthesisCallback | A callback to return speech data synthesized by a text to speech engine. |
| TextToSpeech.OnInitListener | Interface definition of a callback to be invoked indicating the completion of the TextToSpeech engine initialization. |
| TextToSpeech.OnUtteranceCompletedListener | Listener that will be called when the TTS service has completed synthesizing an utterance. |
| SynthesisRequest | Contains data required by engines to synthesize speech. |
| TextToSpeech | Synthesizes speech from text for immediate playback or to create a sound file. |
| TextToSpeech.Engine | Constants and parameter names for controlling text-to-speech. |
| TextToSpeech.EngineInfo | Information about an installed text-to-speech engine. |
| TextToSpeechService | Abstract base class for TTS engine implementations. |
