Changes necessary to get working on Android.

TTS.gd

@@ -10,8 +10,8 @@ signal done
 func _init():
 	if OS.get_name() == "Server" or OS.has_feature("JavaScript"):
 		return
-	elif Engine.has_singleton("AndroidTTS"):
-		tts = Engine.get_singleton("AndroidTTS")
+	elif Engine.has_singleton("GodotTTS"):
+		tts = Engine.get_singleton("GodotTTS")
 	else:
 		TTS = preload("godot-tts.gdns")
 	if TTS and (TTS.can_instance() or Engine.editor_hint):

build.gradle

@@ -23,7 +23,7 @@ android {
     buildToolsVersion "29.0.3"
 
     defaultConfig {
-        minSdkVersion 18
+        minSdkVersion 21
         targetSdkVersion 29 
         versionCode pluginVersionCode
         versionName pluginVersionName

godot-tts.gdap

@@ -3,6 +3,3 @@
 name="GodotTTS"
 binary_type="local"
 binary="godot-tts.aar"
-
-[dependencies]
-remote=[]

src/main/java/games/lightsout/godot/tts/TTS.java

@@ -1,14 +1,12 @@
 package games.lightsout.godot.tts;
 
 import java.util.Arrays;
-import java.util.HashMap;
 import java.util.List;
 
 import org.godotengine.godot.Godot;
 import org.godotengine.godot.plugin.GodotPlugin;
 
 import android.accessibilityservice.AccessibilityServiceInfo;
-import android.app.Activity;
 import android.content.Context;
 import android.speech.tts.TextToSpeech;
 import android.view.accessibility.AccessibilityManager;
@@ -18,15 +16,14 @@ public class TTS extends GodotPlugin implements TextToSpeech.OnInitListener {
 
     private float rate = 1f;
 
-    // private Integer utteranceId = 0;
+    private Integer utteranceId = 0;
 
     public void speak(String text, boolean interrupt) {
         int mode = TextToSpeech.QUEUE_ADD;
         if (interrupt)
             mode = TextToSpeech.QUEUE_FLUSH;
-        HashMap<String, String> params = new HashMap();
-        tts.speak(text, mode, params);
-        // this.utteranceId++;
+        tts.speak(text, mode, null, this.utteranceId.toString());
+        this.utteranceId++;
     }
 
     public void stop() {