Android
[assembly: Dependency(typeof(TextToSpeechImplementation))]//第一步
namespace DependencyServiceSample.Droid
{
public class TextToSpeechImplementation : Java.Lang.Object, ITextToSpeech, TextToSpeech.IOnInitListener
{
TextToSpeech speaker;
string toSpeak;
public void Speak(string text)
{
toSpeak = text;
if (speaker == null)
{
speaker = new TextToSpeech(Forms.Context, this);
}
else
{
speaker.Speak(toSpeak, QueueMode.Flush, null, null);
}
}
public void OnInit(OperationResult status)
{
if (status.Equals(OperationResult.Success))
{
speaker.Speak(toSpeak, QueueMode.Flush, null, null);
}
}
}
}
cross
public MainPage ()
{
var speak = new Button {
Text = "Hello, Forms !",
VerticalOptions = LayoutOptions.CenterAndExpand,
HorizontalOptions = LayoutOptions.CenterAndExpand,
};
speak.Clicked += (sender, e) => {
//从容器里获取实现接口ITextToSpeech的类
DependencyService.Get<ITextToSpeech>().Speak("Hello from Xamarin Forms");
};
Content = speak;
}
