[Android] Add a delay before displaying progress indicator

example/lib/app/app.dart

@@ -1,3 +1,5 @@
+import 'dart:io';
+
 import 'package:chewie/chewie.dart';
 import 'package:chewie_example/app/theme.dart';
 import 'package:flutter/material.dart';
@@ -23,6 +25,7 @@ class _ChewieDemoState extends State<ChewieDemo> {
  late VideoPlayerController _videoPlayerController1;
  late VideoPlayerController _videoPlayerController2;
  ChewieController? _chewieController;
+ int? bufferDelay;
 
  @override
  void initState() {
@@ -39,6 +42,7 @@ class _ChewieDemoState extends State<ChewieDemo> {
  }
 
  List<String> srcs = [
+ "https://assets.mixkit.co/videos/preview/mixkit-spinning-around-the-earth-29351-large.mp4",
  "https://assets.mixkit.co/videos/preview/mixkit-daytime-city-traffic-aerial-view-56-large.mp4",
  "https://assets.mixkit.co/videos/preview/mixkit-a-girl-blowing-a-bubble-gum-at-an-amusement-park-1226-large.mp4"
  ];
@@ -110,6 +114,8 @@ class _ChewieDemoState extends State<ChewieDemo> {
  videoPlayerController: _videoPlayerController1,
  autoPlay: true,
  looping: true,
+ progressIndicatorDelay:
+ bufferDelay != null ? Duration(milliseconds: bufferDelay!) : null,
 
  additionalOptions: (context) {
  return <OptionItem>[
@@ -155,7 +161,10 @@ class _ChewieDemoState extends State<ChewieDemo> {
 
  Future<void> toggleVideo() async {
  await _videoPlayerController1.pause();
- currPlayIndex = currPlayIndex == 0 ? 1 : 0;
+ currPlayIndex += 1;
+ if (currPlayIndex >= srcs.length) {
+ currPlayIndex = 0;
+ }
  await initializePlayer();
  }
 
@@ -302,9 +311,74 @@ class _ChewieDemoState extends State<ChewieDemo> {
  ),
  ],
  ),
+ if (Platform.isAndroid)
+ ListTile(
+ title: const Text("Delay"),
+ subtitle: DelaySlider(
+ delay:
+ _chewieController?.progressIndicatorDelay?.inMilliseconds,
+ onSave: (delay) async {
+ if (delay != null) {
+ bufferDelay = delay == 0 ? null : delay;
+ await initializePlayer();
+ }
+ },
+ ),
+ )
  ],
  ),
  ),
  );
  }
 }
+
+class DelaySlider extends StatefulWidget {
+ const DelaySlider({Key? key, required this.delay, required this.onSave})
+ : super(key: key);
+
+ final int? delay;
+ final void Function(int?) onSave;
+ @override
+ State<DelaySlider> createState() => _DelaySliderState();
+}
+
+class _DelaySliderState extends State<DelaySlider> {
+ int? delay;
+ bool saved = false;
+
+ @override
+ void initState() {
+ super.initState();
+ delay = widget.delay;
+ }
+
+ @override
+ Widget build(BuildContext context) {
+ const int max = 1000;
+ return ListTile(
+ title: Text(
+ "Progress indicator delay ${delay != null ? "${delay.toString()} MS" : ""}",
+ ),
+ subtitle: Slider(
+ value: delay != null ? (delay! / max) : 0,
+ onChanged: (value) async {
+ delay = (value * max).toInt();
+ setState(() {
+ saved = false;
+ });
+ },
+ ),
+ trailing: IconButton(
+ icon: const Icon(Icons.save),
+ onPressed: saved
+ ? null
+ : () {
+ widget.onSave(delay);
+ setState(() {
+ saved = true;
+ });
+ },
+ ),
+ );
+ }
+}

lib/src/chewie_player.dart

@@ -280,6 +280,7 @@ class ChewieController extends ChangeNotifier {
  this.systemOverlaysAfterFullScreen = SystemUiOverlay.values,
  this.deviceOrientationsAfterFullScreen = DeviceOrientation.values,
  this.routePageBuilder,
+ this.progressIndicatorDelay,
  this.hideControlsTimer = defaultHideControlsTimer,
  }) : assert(
  playbackSpeeds.every((speed) => speed > 0),
@@ -324,6 +325,7 @@ class ChewieController extends ChangeNotifier {
  List<DeviceOrientation>? deviceOrientationsOnEnterFullScreen,
  List<SystemUiOverlay>? systemOverlaysAfterFullScreen,
  List<DeviceOrientation>? deviceOrientationsAfterFullScreen,
+ Duration? progressIndicatorDelay,
  Widget Function(
  BuildContext,
  Animation<double>,
@@ -377,6 +379,8 @@ class ChewieController extends ChangeNotifier {
  this.deviceOrientationsAfterFullScreen,
  routePageBuilder: routePageBuilder ?? this.routePageBuilder,
  hideControlsTimer: hideControlsTimer ?? this.hideControlsTimer,
+ progressIndicatorDelay:
+ progressIndicatorDelay ?? this.progressIndicatorDelay,
  );
  }
 
@@ -513,6 +517,9 @@ class ChewieController extends ChangeNotifier {
  /// Defines a custom RoutePageBuilder for the fullscreen
  final ChewieRoutePageBuilder? routePageBuilder;
 
+ /// Defines a delay in milliseconds between entering buffering state and displaying the loading spinner. Set null (default) to disable it.
+ final Duration? progressIndicatorDelay;
+
  static ChewieController of(BuildContext context) {
  final chewieControllerProvider =
  context.dependOnInheritedWidgetOfExactType<ChewieControllerProvider>()!;

lib/src/cupertino/cupertino_controls.dart

@@ -47,6 +47,8 @@ class _CupertinoControlsState extends State<CupertinoControls>
  bool _dragging = false;
  Duration? _subtitlesPosition;
  bool _subtitleOn = false;
+ Timer? _bufferingDisplayTimer;
+ bool _displayBufferingIndicator = false;
 
  late VideoPlayerController controller;
 
@@ -91,7 +93,7 @@ class _CupertinoControlsState extends State<CupertinoControls>
  absorbing: notifier.hideStuff,
  child: Stack(
  children: [
- if (_latestValue.isBuffering)
+ if (_displayBufferingIndicator)
  const Center(
  child: CircularProgressIndicator(),
  )
@@ -769,8 +771,32 @@ class _CupertinoControlsState extends State<CupertinoControls>
  });
  }
 
+ void _bufferingTimerTimeout() {
+ _displayBufferingIndicator = true;
+ if (mounted) {
+ setState(() {});
+ }
+ }
+
  void _updateState() {
  if (!mounted) return;
+
+ // display the progress bar indicator only after the buffering delay if it has been set
+ if (chewieController.progressIndicatorDelay != null) {
+ if (controller.value.isBuffering) {
+ _bufferingDisplayTimer ??= Timer(
+ chewieController.progressIndicatorDelay!,
+ _bufferingTimerTimeout,
+ );
+ } else {
+ _bufferingDisplayTimer?.cancel();
+ _bufferingDisplayTimer = null;
+ _displayBufferingIndicator = false;
+ }
+ } else {
+ _displayBufferingIndicator = controller.value.isBuffering;
+ }
+
  setState(() {
  _latestValue = controller.value;
  _subtitlesPosition = controller.value.position;

lib/src/material/material_controls.dart

@@ -40,6 +40,8 @@ class _MaterialControlsState extends State<MaterialControls>
  Timer? _showAfterExpandCollapseTimer;
  bool _dragging = false;
  bool _displayTapped = false;
+ Timer? _bufferingDisplayTimer;
+ bool _displayBufferingIndicator = false;
 
  final barHeight = 48.0 * 1.5;
  final marginSize = 5.0;
@@ -82,7 +84,7 @@ class _MaterialControlsState extends State<MaterialControls>
  absorbing: notifier.hideStuff,
  child: Stack(
  children: [
- if (_latestValue.isBuffering)
+ if (_displayBufferingIndicator)
  const Center(
  child: CircularProgressIndicator(),
  )
@@ -550,8 +552,32 @@ class _MaterialControlsState extends State<MaterialControls>
  });
  }
 
+ void _bufferingTimerTimeout() {
+ _displayBufferingIndicator = true;
+ if (mounted) {
+ setState(() {});
+ }
+ }
+
  void _updateState() {
  if (!mounted) return;
+
+ // display the progress bar indicator only after the buffering delay if it has been set
+ if (chewieController.progressIndicatorDelay != null) {
+ if (controller.value.isBuffering) {
+ _bufferingDisplayTimer ??= Timer(
+ chewieController.progressIndicatorDelay!,
+ _bufferingTimerTimeout,
+ );
+ } else {
+ _bufferingDisplayTimer?.cancel();
+ _bufferingDisplayTimer = null;
+ _displayBufferingIndicator = false;
+ }
+ } else {
+ _displayBufferingIndicator = controller.value.isBuffering;
+ }
+
  setState(() {
  _latestValue = controller.value;
  _subtitlesPosition = controller.value.position;

lib/src/material/material_desktop_controls.dart

@@ -41,6 +41,8 @@ class _MaterialDesktopControlsState extends State<MaterialDesktopControls>
  Timer? _showAfterExpandCollapseTimer;
  bool _dragging = false;
  bool _displayTapped = false;
+ Timer? _bufferingDisplayTimer;
+ bool _displayBufferingIndicator = false;
 
  final barHeight = 48.0 * 1.5;
  final marginSize = 5.0;
@@ -83,7 +85,7 @@ class _MaterialDesktopControlsState extends State<MaterialDesktopControls>
  absorbing: notifier.hideStuff,
  child: Stack(
  children: [
- if (_latestValue.isBuffering)
+ if (_displayBufferingIndicator)
  const Center(
  child: CircularProgressIndicator(),
  )
@@ -530,8 +532,32 @@ class _MaterialDesktopControlsState extends State<MaterialDesktopControls>
  });
  }
 
+ void _bufferingTimerTimeout() {
+ _displayBufferingIndicator = true;
+ if (mounted) {
+ setState(() {});
+ }
+ }
+
  void _updateState() {
  if (!mounted) return;
+
+ // display the progress bar indicator only after the buffering delay if it has been set
+ if (chewieController.progressIndicatorDelay != null) {
+ if (controller.value.isBuffering) {
+ _bufferingDisplayTimer ??= Timer(
+ chewieController.progressIndicatorDelay!,
+ _bufferingTimerTimeout,
+ );
+ } else {
+ _bufferingDisplayTimer?.cancel();
+ _bufferingDisplayTimer = null;
+ _displayBufferingIndicator = false;
+ }
+ } else {
+ _displayBufferingIndicator = controller.value.isBuffering;
+ }
+
  setState(() {
  _latestValue = controller.value;
  _subtitlesPosition = controller.value.position;

lib/src/progress_bar.dart

@@ -1,3 +1,5 @@
+import 'dart:io';
+
 import 'package:chewie/src/chewie_progress_colors.dart';
 import 'package:flutter/material.dart';
 import 'package:video_player/video_player.dart';
@@ -81,7 +83,15 @@ class _VideoProgressBarState extends State<VideoProgressBar> {
  if (!controller.value.isInitialized) {
  return;
  }
- _seekToRelativePosition(details.globalPosition);
+ // Should only seek if it's not running on Android, or if it is,
+ // then the VideoPlayerController cannot be buffering.
+ // On Android, we need to let the player buffer when scrolling
+ // in order to let the player buffer. https://github.com/flutter/flutter/issues/101409
+ final shouldSeekToRelativePosition =
+ !Platform.isAndroid || !controller.value.isBuffering;
+ if (shouldSeekToRelativePosition) {
+ _seekToRelativePosition(details.globalPosition);
+ }
 
  widget.onDragUpdate?.call();
  },