com.google.appinventor.components.runtime.util

Class InternalTextToSpeech

java.lang.Object

com.google.appinventor.components.runtime.util.InternalTextToSpeech

All Implemented Interfaces:

ITextToSpeech

public class InternalTextToSpeech
extends java.lang.Object
implements ITextToSpeech

Wrapper class for Android's TextToSpeech class, which doesn't exist on pre-1.6 devices. We need to wrap this because the Dalvik class loader will fail to verify a class that contains references to non-existence classes and therefore we arrange for the failure to occur in this class, rather than the component class which references this. The component class can figure out whether it wants to use this wrapper class or not depending on the SDK level. See http://android-developers.blogspot.com/2009/04/backward-compatibility-for-android.html for some more about this.

Nested Class Summary

Nested classes/interfaces inherited from interface com.google.appinventor.components.runtime.util.ITextToSpeech

ITextToSpeech.TextToSpeechCallback

Constructor Summary

Constructors

Constructor and Description
InternalTextToSpeech(android.app.Activity activity, ITextToSpeech.TextToSpeechCallback callback)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	isInitialized()
int	isLanguageAvailable(java.util.Locale loc)
void	onDestroy() This will be called when the Activity is destroyed, to give us a chance to cleanup resources, if necessary.
void	onResume() This will be called when the Activity is resumed, to give us a chance to re-initialize resources, if necessary.
void	onStop() This will be called when the Activity is stopped, to give us a chance to cleanup resources, if necessary.
void	setPitch(float pitch) Sets the speech pitch for the TextToSpeech
void	setSpeechRate(float speechRate) Sets the speech rate
void	speak(java.lang.String message, java.util.Locale loc) Speaks the given message corresponding to the language and country of the given locale.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

InternalTextToSpeech

public InternalTextToSpeech(android.app.Activity activity,
                    ITextToSpeech.TextToSpeechCallback callback)

Method Detail

speak

public void speak(java.lang.String message,
         java.util.Locale loc)

Description copied from interface: ITextToSpeech

Speaks the given message corresponding to the language and country of the given locale.

Specified by:

speak in interface ITextToSpeech

Parameters:

message - the message to speak

loc - the locale to use

isInitialized

public boolean isInitialized()

Specified by:

isInitialized in interface ITextToSpeech

onStop

public void onStop()

Description copied from interface: ITextToSpeech

This will be called when the Activity is stopped, to give us a chance to cleanup resources, if necessary.

Specified by:

onStop in interface ITextToSpeech

onDestroy

public void onDestroy()

Description copied from interface: ITextToSpeech

This will be called when the Activity is destroyed, to give us a chance to cleanup resources, if necessary.

Specified by:

onDestroy in interface ITextToSpeech

onResume

public void onResume()

Description copied from interface: ITextToSpeech

This will be called when the Activity is resumed, to give us a chance to re-initialize resources, if necessary.

Specified by:

onResume in interface ITextToSpeech

setPitch

public void setPitch(float pitch)

Description copied from interface: ITextToSpeech

Sets the speech pitch for the TextToSpeech

Specified by:

setPitch in interface ITextToSpeech

Parameters:

pitch - 1.0 is the normal pitch, lower values lower the tone of the synthesized voice, greater values increase it.

setSpeechRate

public void setSpeechRate(float speechRate)

Description copied from interface: ITextToSpeech

Sets the speech rate

Specified by:

setSpeechRate in interface ITextToSpeech

Parameters:

speechRate - Speech rate. 1.0 is the normal speech rate, lower values slow down the speech (0.5 is half the normal speech rate), greater values accelerate it (2.0 is twice the normal speech rate).

isLanguageAvailable

public int isLanguageAvailable(java.util.Locale loc)

Specified by:

isLanguageAvailable in interface ITextToSpeech