如何在MVVMCross插件中使用Android TextToSpeak?
我已经看到了很多关于如何在活动中使用Android TextToSpeak的例子,并且也成功地使其正常工作。我还设法在插件中使用绑定服务使其工作,但就我的目的而言,它似乎过于复杂了。这是我的语音服务课:如何在MVVMCross插件中使用Android TextToSpeak?,android,xamarin,mvvmcross,Android,Xamarin,Mvvmcross,我已经看到了很多关于如何在活动中使用Android TextToSpeak的例子,并且也成功地使其正常工作。我还设法在插件中使用绑定服务使其工作,但就我的目的而言,它似乎过于复杂了。这是我的语音服务课: public class VoiceService : IVoiceService, TextToSpeech.IOnInitListener { public event EventHandler FinishedSpeakingEventHandler; private T
public class VoiceService : IVoiceService, TextToSpeech.IOnInitListener
{
public event EventHandler FinishedSpeakingEventHandler;
private TextToSpeech _tts;
public void Init()
{
// Use a speech progress listener so we get notified when the service finishes speaking the prompt
var progressListener = new SpeechProgressListener();
progressListener.FinishedSpeakingEventHandler += OnUtteranceCompleted;
//_tts = new TextToSpeech(Application.Context, this);
_tts = new TextToSpeech(Mvx.Resolve<IMvxAndroidCurrentTopActivity>().Activity, this);
_tts.SetOnUtteranceProgressListener(progressListener);
}
public void OnInit(OperationResult status)
{
// THIS EVENT NEVER FIRES!
Console.WriteLine("VoiceService TextToSpeech Initialised. Status: " + status);
if (status == OperationResult.Success)
{
}
}
public void Speak(string prompt)
{
if (!string.IsNullOrEmpty(prompt))
{
var map = new Dictionary<string, string> { { TextToSpeech.Engine.KeyParamUtteranceId, new Guid().ToString() } };
_tts.Speak(prompt, QueueMode.Flush, map);
Console.WriteLine("tts_Speak: " + prompt);
}
else
{
Console.WriteLine("tts_Speak: PROMPT IS NULL OR EMPTY!");
}
}
/// <summary>
/// When we finish speaking, call the event handler
/// </summary>
public void OnUtteranceCompleted(object sender, EventArgs e)
{
if (FinishedSpeakingEventHandler != null)
{
FinishedSpeakingEventHandler(this, new EventArgs());
}
}
public void Dispose()
{
//throw new NotImplementedException();
}
public IntPtr Handle { get; private set; }
}
执行此操作时,我会在输出中获得以下消息:
10-13 08:13:59.734 I/TextToSpeech(2298):成功绑定到com.google.android.tts
(在创建新的TTS对象时发生)
及
10-13 08:14:43.924 W/TextToSpeech(2298):讲话失败:未绑定到TTS引擎
(当我呼叫tts.Speak(提示)时)
如果我正在使用一个活动,我会创建一个让它工作的意图,但我不确定如何在插件中做到这一点
提前感谢,
David不要自己实现
Handle
,而是从Java.Lang.Object
public class VoiceService : Java.Lang.Object, IVoiceService, TextToSpeech.IOnInitListener
并删除您的Dispose()
和Handle
实现
更多信息请点击此处:
此外,我建议您在实现服务时采用异步方法,这将使从视图模型调用它类似于
await MvxResolve<ITextToSpeechService>().SpeakAsync(text);
wait MvxResolve().SpeakAsync(文本);
谢谢@Andrei,它源于Java.Lang.Object,解决了我的问题,我现在也重新考虑使用建议的异步方法,使代码更简单。很高兴听到这个消息!异步是伟大的
await MvxResolve<ITextToSpeechService>().SpeakAsync(text);