Flutter TTS plugin not initializing on android through an async handler

[mdsalman729]

Hi, I am getting this issue when i try to initialize the plugin through an async task.

E/flutter (11121): [ERROR:flutter/lib/ui/ui_dart_state.cc(177)] Unhandled Exception: MissingPluginException(No implementation found for method getLanguages on channel flutter_tts) E/flutter (11121): #0 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:157:7) E/flutter (11121): E/flutter (11121): #1 MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:332:12) E/flutter (11121): #2 FlutterTts.getLanguages (package:flutter_tts/flutter_tts.dart:207:38) E/flutter (11121): #3 _MyAppState._getLanguages (package:example/main.dart:108:34) E/flutter (11121): #4 _MyAppState.initTts (package:example/main.dart:56:5) E/flutter (11121): #5 _MyAppState.initState (package:example/main.dart:50:5)

I currently have a handler listening for action process text event on android which allows me to share the text selected in other android apps with my flutter app. Here is my code -

class _MyAppState extends State<MyApp> { FlutterTts flutterTts; dynamic languages; String language; double volume = 0.5; double pitch = 1.0; double rate = 0.5; bool isCurrentLanguageInstalled = false;

String _newVoiceText;

TtsState ttsState = TtsState.stopped;

get isPlaying => ttsState == TtsState.playing; get isStopped => ttsState == TtsState.stopped; get isPaused => ttsState == TtsState.paused; get isContinued => ttsState == TtsState.continued;

bool get isIOS => !kIsWeb && Platform.isIOS; bool get isAndroid => !kIsWeb && Platform.isAndroid; bool get isWeb => kIsWeb;

String inputText = ''; Future initActionProcessText() async { inputText = await ActionProcessText.getInputText; //setState(() {}); //initTts(); }

@override initState() { super.initState(); initTts(); }

initTts() { flutterTts = FlutterTts();

_getLanguages();

if (isAndroid) {
  _getEngines();
}

flutterTts.setStartHandler(() {
  setState(() {
    print("Playing");
    ttsState = TtsState.playing;
  });
});

flutterTts.setCompletionHandler(() {
  setState(() {
    print("Complete");
    ttsState = TtsState.stopped;
  });
});

flutterTts.setCancelHandler(() {
  setState(() {
    print("Cancel");
    ttsState = TtsState.stopped;
  });
});

if (isWeb || isIOS) {
  flutterTts.setPauseHandler(() {
    setState(() {
      print("Paused");
      ttsState = TtsState.paused;
    });
  });

  flutterTts.setContinueHandler(() {
    setState(() {
      print("Continued");
      ttsState = TtsState.continued;
    });
  });
}

flutterTts.setErrorHandler((msg) {
  setState(() {
    print("error: $msg");
    ttsState = TtsState.stopped;
  });
});

}

Future _getLanguages() async { languages = await flutterTts.getLanguages; if (languages != null) setState(() => languages); }

Future _getEngines() async { var engines = await flutterTts.getEngines; if (engines != null) { for (dynamic engine in engines) { print(engine); } } }

Any help would be appreciated.

[dlutton]

Try to set languages in a FutureBuilder. I updated the example with something similar.