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Package uk.ac.qmul.eecs.ccmi.accessibility

Class AccessibilityService

  • java.lang.Object
    • uk.ac.qmul.eecs.ccmi.accessibility.AccessibilityService

  • public class AccessibilityService
extends java.lang.Object
    Encloses all the services needed to implement a custom accessibility system. Text-to-speech synthesis, sound and device vibration.

    • Constructor Detail

      • AccessibilityService

        public AccessibilityService(Context context)
        Constructs a new AccessibilityService.
        Parameters:
        context - The current context

    • Method Detail

      • getInstance

        public static AccessibilityService getInstance(Context context)
        Creates an instance of AccessibilityService. It implements the singleton pattern, therefore successive calls to this method will always return the same object.
        Parameters:
        context - The context to use. Usually your Application or Activity object.
        Returns:
        a singleton instance of AccessibilityService

      • loadSounds

        public void loadSounds()
        Loads the built in sound library. This method must be called before any call to playSound or stopSound.

      • playSound

        public void playSound(AccessibilityService.SoundEvent event,
                      boolean loop)
        Plays the sound associated to a SoundEvent.
        Parameters:
        event - the event to play the sound of
        loop - whether to play the sound in a continuous loop or not

      • playSound

        public void playSound(AccessibilityService.SoundEvent event)
        Plays the sound associated to a SoundEvent once. This call is equivalent to playSound(event,false).
        Parameters:
        event - the event to play the sound of

      • stopSound

        public void stopSound()
        Stop all the sounds being played at the moment of the call. Useful to stop a sound that is looping after a call to playSound(event,true).

      • speak

        public void speak(java.lang.String text)
        Utters a text via android text to speech synthesizer
        Parameters:
        text - the string to be uttered

      • vibrate

        public void vibrate()
        Make the device vibrate

      • dispose

        public void dispose()
        Dispose the resources allocated during initialization. To be called when the class is no longer needed by client classes.
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