speaker_widget.dart
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import 'package:flutter/material.dart';
import 'dart:async';
import 'package:wow_english/common/extension/string_extension.dart';
/// 扬声器播放组件，帧动画
class SpeakerWidget extends StatefulWidget {
final bool isPlaying;
final bool isClickable;
final double width;
final double height;
final VoidCallback? onTap;
SpeakerWidget({
super.key,
this.isPlaying = false,
this.isClickable = true,
required this.width,
required this.height,
this.onTap,
});
@override
_SpeakerWidgetState createState() => _SpeakerWidgetState();
}
class _SpeakerWidgetState extends State<SpeakerWidget>
with SingleTickerProviderStateMixin {
late AnimationController _controller;
int _currentFrame = 0;
Timer? _timer;
final List<String> _speakerImagePaths = [
'ic_speaker_play2'.assetPng,
'ic_speaker_play0'.assetPng,
'ic_speaker_play1'.assetPng,
];
@override
void initState() {
super.initState();
_controller = AnimationController(
duration: const Duration(milliseconds: 300), // 每帧的持续时间
vsync: this,
);
if (widget.isPlaying) {
_startAnimation();
}
}
@override
void didUpdateWidget(SpeakerWidget oldWidget) {
super.didUpdateWidget(oldWidget);
if (widget.isPlaying != oldWidget.isPlaying) {
if (widget.isPlaying) {
_startAnimation();
} else {
_stopAnimation();
}
}
}
void _startAnimation() {
_timer = Timer.periodic(const Duration(milliseconds: 300), (Timer timer) {
setState(() {
_currentFrame = ((_currentFrame + 1) % 3);
});
});
}
void _stopAnimation() {
_timer?.cancel();
setState(() {
_currentFrame = 0;
});
}
@override
void dispose() {
_controller.dispose();
_timer?.cancel();
super.dispose();
}
@override
Widget build(BuildContext context) {
return GestureDetector(
onTap: widget.isClickable ? widget.onTap : null,
child: Image.asset(
_speakerImagePaths[_currentFrame],
width: widget.width,
height: widget.height,
fit: BoxFit.cover,
),
);
}
}