添加项目文件。

2020-04-03 11:55:02 +08:00
parent f8a6829e30
commit d4e7a559f2
178 changed files with 20595 additions and 0 deletions
--- a/XXCpzs.Android/Services/TextToSpeechService.cs
+++ b/XXCpzs.Android/Services/TextToSpeechService.cs
@@ -0,0 +1,83 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using Android.Speech.Tts;
+using XXCpzs.Services;
+
+namespace XXCpzs.Droid.Services
+{
+    public class TextToSpeechService : Java.Lang.Object, ITextToSpeechService, TextToSpeech.IOnInitListener,
+#pragma warning disable CS0618
+        TextToSpeech.IOnUtteranceCompletedListener
+#pragma warning restore CS0618
+    {
+        TextToSpeech speaker;
+        TaskCompletionSource<bool> tcsInitialize;
+        TaskCompletionSource<bool> tcsUtterance;
+
+        Task<bool> Initialize()
+        {
+            if (tcsInitialize != null)
+                return tcsInitialize.Task;
+
+            tcsInitialize = new TaskCompletionSource<bool>();
+            try
+            {
+                speaker = new TextToSpeech(MainActivity.Instance, this);
+#pragma warning disable CS0618
+                speaker.SetOnUtteranceCompletedListener(this);
+#pragma warning restore CS0618
+            }
+            catch (Exception ex)
+            {
+                tcsInitialize.TrySetException(ex);
+            }
+            return tcsInitialize.Task;
+        }
+
+        public async Task SpeakAsync(string text)
+        {
+            await Initialize();
+
+            if (tcsUtterance?.Task != null)
+                await tcsUtterance.Task;
+
+            tcsUtterance = new TaskCompletionSource<bool>();
+
+            // Set the utterance id so the completed listener fires
+            var parameters = new Dictionary<string, string>();
+            parameters.Add(TextToSpeech.Engine.KeyParamUtteranceId, new Guid().ToString());
+
+            // Use an obsolete overload so it works on older API levels
+#pragma warning disable CS0618
+            speaker.Speak(text, QueueMode.Flush, parameters);
+#pragma warning restore CS0618
+            await tcsUtterance.Task;
+        }
+
+        public void OnInit(OperationResult status)
+        {
+            if (status.Equals(OperationResult.Success))
+                tcsInitialize.TrySetResult(true);
+            else
+                tcsInitialize.TrySetException(new ArgumentException("Failed to initialize TTS engine."));
+        }
+
+        public void OnUtteranceCompleted(string utteranceId)
+        {
+            tcsUtterance.TrySetResult(true);
+        }
+
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing)
+            {
+                speaker?.Stop();
+                speaker?.Shutdown();
+                speaker = null;
+            }
+
+            base.Dispose(disposing);
+        }
+    }
+}