topic_picture_bloc.dart
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import 'package:audioplayers/audioplayers.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/services.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:flutter_easyloading/flutter_easyloading.dart';
import 'package:wow_english/common/request/dao/listen_dao.dart';
import 'package:wow_english/common/request/exception.dart';
import 'package:wow_english/models/course_process_entity.dart';
import 'package:wow_english/utils/loading.dart';
part 'topic_picture_event.dart';
part 'topic_picture_state.dart';
class TopicPictureBloc extends Bloc<TopicPictureEvent, TopicPictureState> {
final PageController pageController;
final String courseLessonId;
int _currentPage = 0;
int _selectItem = -1;
CourseProcessEntity? _entity;
///正在评测
bool _isVoicing = false;
CourseProcessEntity? get entity => _entity;
int get currentPage => _currentPage + 1;
int get selectItem => _selectItem;
bool get isVoicing => _isVoicing;
late MethodChannel methodChannel;
late AudioPlayer audioPlayer;
TopicPictureBloc(this.pageController, this.courseLessonId) : super(TopicPictureInitial()) {
on<CurrentPageIndexChangeEvent>(_pageControllerChange);
on<SelectItemEvent>(_selectItemLoad);
on<RequestDataEvent>(_requestData);
on<XSVoiceTestEvent>(_voiceXsTest);
on<XSVoiceResultEvent>(_voiceXsResult);
on<XSVoiceInitEvent>(_initVoiceSdk);
on<TopicPictureEvent>((event, emit) {
//音频播放器
audioPlayer = AudioPlayer();
audioPlayer.onPlayerStateChanged.listen((event) {
if (event == PlayerState.completed) {
if (kDebugMode) {
print('播放完成');
}}
});
methodChannel = const MethodChannel('wow_english/sing_sound_method_channely');
methodChannel.setMethodCallHandler((call) async {
if (call.method == 'voiceResult') {//评测结果
add(XSVoiceResultEvent(call.arguments));
return;
}
if (call.method == 'voiceStart') {//评测开始
if (kDebugMode) {
print('评测开始');
}
return;
}
if (call.method == 'voiceEnd') {//评测结束
if (kDebugMode) {
print('评测结束');
}
return;
}
if (call.method == 'voiceFail') {//评测失败
EasyLoading.showToast('评测失败');
return;
}
});
});
}
@override
Future<void> close() {
pageController.dispose();
audioPlayer.dispose();
return super.close();
}
///请求数据
void _requestData(RequestDataEvent event,Emitter<TopicPictureState> emitter) async {
try {
await loading(() async {
_entity = await ListenDao.process(courseLessonId);
emitter(RequestDataState());
});
} catch (e) {
if (e is ApiException) {
EasyLoading.showToast(e.message??'请求失败,请检查网络连接');
}
}
}
///初始化SDK
_initVoiceSdk(XSVoiceInitEvent event,Emitter<TopicPictureState> emitter) async {
methodChannel.invokeMethod('initVoiceSdk',event.data);
}
///页面切换
void _pageControllerChange(CurrentPageIndexChangeEvent event,Emitter<TopicPictureState> emitter) async {
_currentPage = event.pageIndex;
final topics = _entity?.topics?[_currentPage];
if (topics?.type == 1 || topics?.type == 2 || topics?.type == 5) {
audioPlayer.stop();
if (topics?.audioUrl != null) {
final urlStr = topics?.audioUrl??'';
if (urlStr.isNotEmpty) {
audioPlayer.play(UrlSource(urlStr));
}
}
} else {
audioPlayer.stop();
}
_selectItem = -1;
emitter(CurrentPageIndexState());
}
///选择
void _selectItemLoad(SelectItemEvent event,Emitter<TopicPictureState> emitter) async {
_selectItem = event.selectIndex;
emitter(SelectItemChangeState());
}
///先声测试
void _voiceXsTest(XSVoiceTestEvent event,Emitter<TopicPictureState> emitter) async {
EasyLoading.show(status: '录音中....');
methodChannel.invokeMethod(
'startVoice',
{'word':event.testWord,'type':event.type,'userId':event.userId.toString()}
);
_isVoicing = true;
emitter(XSVoiceTestState());
}
void _voiceXsResult(XSVoiceResultEvent event,Emitter<TopicPictureState> emitter) async {
final Map args = event.message as Map;
final result = args['result'] as String;
if (result == '1') {
final overall = args['overall'].toString();
EasyLoading.showToast('测评成功,分数是$overall',duration: const Duration(seconds: 10));
} else {
EasyLoading.showToast('测评失败',duration: const Duration(seconds: 10));
}
_isVoicing = false;
emitter(XSVoiceTestState());
}
}