ff_annotation_route_library: any
http_client_helper: any
intl: any
like_button: any
loading_more_list: any
pull_to_refresh_notification: any
url_launcher: any
1.图片自适应：
Widget image = Stack(
children: [
ExtendedImage.network(
item.imageUrl,
shape: BoxShape.rectangle,
//clearMemoryCacheWhenDispose: true,
border: Border.all(color: Colors.grey.withOpacity(0.4), width: 1.0),
borderRadius: const BorderRadius.all(
Radius.circular(10.0),
),
loadStateChanged: (ExtendedImageState value) {
if (value.extendedImageLoadState == LoadState.loading) {
Widget loadingWidget = Container(
alignment: Alignment.center,
color: Colors.grey.withOpacity(0.8),
child: CircularProgressIndicator(
strokeWidth: 2.0,
valueColor:
AlwaysStoppedAnimation(Theme.of?.primaryColor),
),
);
if (!konwSized) {
//todo: not work in web
loadingWidget = AspectRatio(
aspectRatio: 1.0,
child: loadingWidget,
);
}
return loadingWidget;
} else if (value.extendedImageLoadState == LoadState.completed) {
item.imageRawSize = Size(
value.extendedImageInfo.image.width.toDouble(),
value.extendedImageInfo.image.height.toDouble());
}
return null;
},
),
Positioned(
top: 5.0,
right: 5.0,
child: Container(
padding: const EdgeInsets.all(3.0),
decoration: BoxDecoration(
color: Colors.grey.withOpacity(0.6),
border: Border.all(color: Colors.grey.withOpacity(0.4), width: 1.0),
borderRadius: const BorderRadius.all(
Radius.circular(5.0),
),
),
child: Text(
‘${index + 1}’,
textAlign: TextAlign.center,
style: const TextStyle(fontSize: fontSize, color: Colors.white),
),
),
)
],
);
if (konwSized) {
image = AspectRatio(
aspectRatio: item.imageSize.width / item.imageSize.height,
child: image,
);
} else if (item.imageRawSize != null) {
image = AspectRatio(
aspectRatio: item.imageRawSize.width / item.imageRawSize.height,
child: image,
);
}
return Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
image,
const SizedBox(
height: 5.0,
),
buildTagsWidget(item),
const SizedBox(
height: 5.0,
),
buildBottomWidget(item),
],
);
}
2.自适应标签：
Widget buildTagsWidget(
TuChongItem item, {
int maxNum = 6,
}) {
const double fontSize = 12.0;
return Wrap(
runSpacing: 5.0,
spacing: 5.0,
children: item.tags.take(maxNum).map((String tag) {
final Color
color = item.tagColors[item.tags.indexOf(tag)];
return Container(
padding: const EdgeInsets.all(3.0),
decoration: BoxDecoration(
color: color,
border: Border.all(color: Colors.grey.withOpacity(0.4), width: 1.0),
borderRadius: const BorderRadius.all(
Radius.circular(5.0),
),
),
child: Text(
tag,
textAlign: TextAlign.start,
style: TextStyle(
fontSize: fontSize,
color: color.computeLuminance() < 0.5
-
? Colors.white
- Colors.black),
),
);
}).toList());
}
3.上拉刷新和下拉加载
class PullToRefreshHeader extends StatelessWidget {
const PullToRefreshHeader(this.info, this.lastRefreshTime, {this.color});
final PullToRefreshScrollNotificationInfo info;
final DateTime lastRefreshTime;
final Color color;
@override
Widget build(BuildContext context) {
if (info == null) {
return Container();
}
String text = ‘’;
if (info.mode == RefreshIndicatorMode.armed) {
text = ‘Release to refresh’;
} else if (info.mode == RefreshIndicatorMode.refresh ||
info.mode == RefreshIndicatorMode.snap) {
text = ‘Loading…’;
} else if (info.mode == RefreshIndicatorMode.done) {
text = ‘Refresh completed.’;
} else if (info.mode == RefreshIndicatorMode.drag) {
text = ‘Pull to refresh’;
} else if (info.mode == RefreshIndicatorMode.canceled) {
text = ‘Cancel refresh’;
}
final TextStyle ts = const TextStyle(
color: Colors.grey,
).copyWith(fontSize: 13);
final double dragOffset = info?.dragOffset ?? 0.0;
final DateTime time = lastRefreshTime ?? DateTime.now();
final double top = -hideHeight + dragOffset;
return Container(
height: dragOffset,
color: color ?? Colors.transparent,
//padding: EdgeInsets.only(top: dragOffset / 3),
//padding: EdgeInsets.only(bottom: 5.0),
child: Stack(
children: [
Positioned(
left: 0.0,
right: 0.0,
top: top,
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Expanded(
child: Container(
alignment: Alignment.centerRight,
child: RefreshImage(top),
margin: const EdgeInsets.only(right: 12.0),
),
),
Stack(
children: [
Positioned(
left: 0.0,
right: 0.0,
top: top,
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Expanded(
child: Container(
alignment: Alignment.centerRight,
child: RefreshImage(top),
margin: const EdgeInsets.only(right: 12.0),
),
),