Task Speak(CancellationToken?cancelToken)
{
if (string.IsNullOrWhiteSpace(text))
{
return(Task.CompletedTask);
}
if (language.HasValue && !string.IsNullOrWhiteSpace(language.Value.Language))
{
Locale locale = null;
if (!string.IsNullOrWhiteSpace(language.Value.Country))
{
locale = new Locale(language.Value.Language, language.Value.Country);
}
else
{
locale = new Locale(language.Value.Language);
}
var result = textToSpeech.IsLanguageAvailable(locale);
if (result == LanguageAvailableResult.CountryAvailable)
{
textToSpeech.SetLanguage(locale);
}
else
{
Console.WriteLine("Locale: " + locale + " was not valid, setting to default.");
SetDefaultLanguage();
}
}
else
{
SetDefaultLanguage();
}
var tcs = new TaskCompletionSource <object>();
cancelToken?.Register(() =>
{
textToSpeech.Stop();
tcs.TrySetCanceled();
});
textToSpeech.SetPitch(pitch);
textToSpeech.SetSpeechRate(speakRate);
textToSpeech.SetOnUtteranceProgressListener(new TtsProgressListener(tcs));
#pragma warning disable CS0618 // Type or member is obsolete
count++;
var map = new Dictionary <string, string>
{
[Android.Speech.Tts.TextToSpeech.Engine.KeyParamUtteranceId] = count.ToString()
};
textToSpeech.Speak(text, QueueMode.Flush, map);
#pragma warning restore CS0618 // Type or member is obsolete
return(tcs.Task);
}
private void Speak()
{
if (string.IsNullOrWhiteSpace(text))
{
return;
}
if (!queue && textToSpeech.IsSpeaking)
{
textToSpeech.Stop();
}
if (language.HasValue && !string.IsNullOrWhiteSpace(language.Value.Language))
{
Locale locale = null;
if (!string.IsNullOrWhiteSpace(language.Value.Country))
{
locale = new Locale(language.Value.Language, language.Value.Country);
}
else
{
locale = new Locale(language.Value.Language);
}
var result = textToSpeech.IsLanguageAvailable(locale);
if (result == LanguageAvailableResult.CountryAvailable)
{
textToSpeech.SetLanguage(locale);
}
else
{
Console.WriteLine("Locale: " + locale + " was not valid, setting to default.");
SetDefaultLanguage();
}
}
else
{
SetDefaultLanguage();
}
textToSpeech.SetPitch(pitch);
textToSpeech.SetSpeechRate(speakRate);
textToSpeech.Speak(text, queue ? QueueMode.Add : QueueMode.Flush, null);
}
private bool IsLocaleAvailable(JavaLocale l)
{
try
{
var r = tts.IsLanguageAvailable(l);
return
(r == LanguageAvailableResult.Available ||
r == LanguageAvailableResult.CountryAvailable ||
r == LanguageAvailableResult.CountryVarAvailable);
}
catch (Exception ex)
{
Debug.WriteLine("Error checking language; " + l + " " + ex);
}
return(false);
}
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.Main);
// we need to register the onscreen gadgets we're interested in
var btnSayIt = FindViewById<Button>(Resource.Id.btnSpeak);
var editWhatToSay = FindViewById<EditText>(Resource.Id.editSpeech);
var spinLanguages = FindViewById<Spinner>(Resource.Id.spinLanguage);
var txtSpeedVal = FindViewById<TextView>(Resource.Id.textSpeed);
var txtPitchVal = FindViewById<TextView>(Resource.Id.textPitch);
var seekSpeed = FindViewById<SeekBar>(Resource.Id.seekSpeed);
var seekPitch = FindViewById<SeekBar>(Resource.Id.seekPitch);
// set up the initial pitch and speed values then the onscreen values
// the pitch and rate both go from 0f to 1f, however if you have a seek bar with a max of 1, you get a single step
// therefore, a simpler option is to have the slider go from 0 to 255 and divide the position of the slider by 255 to get
// the float
seekSpeed.Progress = seekPitch.Progress = 127;
txtSpeedVal.Text = txtPitchVal.Text = "0.5";
// get the context - easiest way is to obtain it from an on screen gadget
context = btnSayIt.Context;
// set up the TextToSpeech object
// third parameter is the speech engine to use
textToSpeech = new TextToSpeech(this, this, "com.google.android.tts");
// set up the langauge spinner
// set the top option to be default
var langAvailable = new List<string>{ "Default" };
// our spinner only wants to contain the languages supported by the tts and ignore the rest
var localesAvailable = Java.Util.Locale.GetAvailableLocales().ToList();
foreach (var locale in localesAvailable)
{
LanguageAvailableResult res = textToSpeech.IsLanguageAvailable(locale);
switch (res)
{
case LanguageAvailableResult.Available:
langAvailable.Add(locale.DisplayLanguage);
break;
case LanguageAvailableResult.CountryAvailable:
langAvailable.Add(locale.DisplayLanguage);
break;
case LanguageAvailableResult.CountryVarAvailable:
langAvailable.Add(locale.DisplayLanguage);
break;
}
}
langAvailable = langAvailable.OrderBy(t => t).Distinct().ToList();
var adapter = new ArrayAdapter<string>(this, Android.Resource.Layout.SimpleSpinnerDropDownItem, langAvailable);
spinLanguages.Adapter = adapter;
// set up the speech to use the default langauge
// if a language is not available, then the default language is used.
lang = Java.Util.Locale.Default;
textToSpeech.SetLanguage(lang);
// set the speed and pitch
textToSpeech.SetPitch(.5f);
textToSpeech.SetSpeechRate(.5f);
// connect up the events
btnSayIt.Click += delegate
{
// if there is nothing to say, don't say it
if (!string.IsNullOrEmpty(editWhatToSay.Text))
textToSpeech.Speak(editWhatToSay.Text, QueueMode.Flush, null);
};
// sliders
seekPitch.StopTrackingTouch += (object sender, SeekBar.StopTrackingTouchEventArgs e) =>
{
var seek = sender as SeekBar;
var progress = seek.Progress / 255f;
textToSpeech.SetPitch(progress);
txtPitchVal.Text = progress.ToString("F2");
};
seekSpeed.StopTrackingTouch += (object sender, SeekBar.StopTrackingTouchEventArgs e) =>
{
var seek = sender as SeekBar;
var progress = seek.Progress / 255f;
textToSpeech.SetSpeechRate(progress);
txtSpeedVal.Text = progress.ToString("F2");
};
spinLanguages.ItemSelected += (object sender, AdapterView.ItemSelectedEventArgs e) =>
{
lang = Java.Util.Locale.GetAvailableLocales().FirstOrDefault(t => t.DisplayLanguage == langAvailable[(int)e.Id]);
// create intent to check the TTS has this language installed
var checkTTSIntent = new Intent();
checkTTSIntent.SetAction(TextToSpeech.Engine.ActionCheckTtsData);
StartActivityForResult(checkTTSIntent, NeedLang);
};
}
async Task Speak(CancellationToken?cancelToken)
{
if (string.IsNullOrWhiteSpace(text))
{
//return Task.CompletedTask;
return;
}
if (language.HasValue && !string.IsNullOrWhiteSpace(language.Value.Language))
{
Locale locale = null;
if (!string.IsNullOrWhiteSpace(language.Value.Country))
{
locale = new Locale(language.Value.Language, language.Value.Country);
}
else
{
locale = new Locale(language.Value.Language);
}
var result = textToSpeech.IsLanguageAvailable(locale);
if (result == LanguageAvailableResult.CountryAvailable)
{
textToSpeech.SetLanguage(locale);
}
else
{
Console.WriteLine("Locale: " + locale + " was not valid, setting to default.");
SetDefaultLanguage();
}
}
else
{
SetDefaultLanguage();
}
var tcs = new TaskCompletionSource();
var flag = new AsyncManualResetEvent();
var utteranceID = Guid.NewGuid().ToString();
var doneTask = listener.ListenFor(utteranceID);
cancelToken?.Register(() =>
{
textToSpeech.Stop();
tcs?.TrySetCanceled();
listener?.completionSources?[utteranceID]?.TrySetCanceled();
});
var utteranceProgressListenerDictionary = new Dictionary <string, string>();
utteranceProgressListenerDictionary.Add(Android.Speech.Tts.TextToSpeech.Engine.KeyParamUtteranceId, utteranceID);
utteranceProgressListenerDictionary.Add(Android.Speech.Tts.TextToSpeech.Engine.KeyParamVolume, volume.ToString());
textToSpeech.SetPitch(pitch);
textToSpeech.SetSpeechRate(speakRate);
//textToSpeech.SetOnUtteranceProgressListener(new TtsProgressListener(flag));
//var bundle = new Android.OS.Bundle();
//bundle.PutFloat(Android.Speech.Tts.TextToSpeech.Engine.KeyParamVolume, 1.0f);
#pragma warning disable CS0618 // Type or member is obsolete
//textToSpeech.Speak(text, QueueMode.Flush, bundle, text);
textToSpeech.Speak(text, QueueMode.Flush, utteranceProgressListenerDictionary);
#pragma warning restore CS0618 // Type or member is obsolete
//return tcs.Task;
//return Task.WhenAny(tcs.Task, flag.WaitAsync());
//return listener.IsDone();
//int i = 0;
//var sw = new System.Diagnostics.Stopwatch();
//sw.Start();
//while (doneTask.Status != TaskStatus.RanToCompletion)
//{
// Task.Delay(100).Wait(101);
// //await Task.Delay(100, CancellationTokenHelpers.Timeout(105).Token);
// Android.Util.Log.Debug("Speech", $"Iteration {i}, {sw.ElapsedMilliseconds} ms - status is {doneTask.Status}.");
// i++;
//}
//return doneTask;
await doneTask;
}
