➖ Remove common exports and split out constants.

Author: AlexV525

lib/src/constants/constants.dart

@@ -2,18 +2,22 @@
 /// [Author] Alex (https://github.com/Alex525)
 /// [Date] 2020/3/31 16:02
 ///
+import 'dart:developer';
+
+import 'package:flutter/foundation.dart';
 import 'package:flutter/widgets.dart';
 
 import 'constants.dart';
 
-export 'package:flutter_common_exports/flutter_common_exports.dart';
-
 export '../delegates/assets_picker_text_delegate.dart';
 export '../delegates/sort_path_delegate.dart';
+export '../widget/platform_progress_indicator.dart';
 
 export 'colors.dart';
 export 'custom_scroll_physics.dart';
 export 'enums.dart';
+export 'extensions.dart';
+export 'screens.dart';
 
 class Constants {
   const Constants._();
@@ -24,3 +28,11 @@ class Constants {
       DefaultAssetsPickerTextDelegate();
   static SortPathDelegate sortPathDelegate = SortPathDelegate.common;
 }
+
+/// Log only in debug mode.
+/// 只在调试模式打印
+void realDebugPrint(dynamic message) {
+  if (!kReleaseMode) {
+    log('$message');
+  }
+}

lib/src/constants/extensions.dart

@@ -0,0 +1,19 @@
+///
+/// [Author] Alex (https://github.com/AlexV525)
+/// [Date] 2020/8/19 10:34
+///
+import 'package:flutter/material.dart';
+
+extension BuildContextExtension on BuildContext {
+  MediaQueryData get mediaQuery => MediaQuery.of(this);
+  ThemeData get themeData => Theme.of(this);
+}
+
+extension BrightnessExtension on Brightness {
+  bool get isDark => this == Brightness.dark;
+  bool get isLight => this == Brightness.light;
+}
+
+extension ColorExtension on Color {
+  bool get isTransparent => this == Colors.transparent;
+}

lib/src/constants/screens.dart

@@ -0,0 +1,64 @@
+///
+/// [Author] Alex (https://github.com/AlexV525)
+/// [Date] 2020/8/19 10:29
+///
+import 'dart:ui' as ui;
+
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+
+/// Screens utils with multiple properties access.
+/// 获取屏幕各项属性的工具类
+class Screens {
+  const Screens._();
+
+  /// Get [MediaQueryData] from [ui.window]
+  /// 通过 [ui.window] 获取 [MediaQueryData]
+  static MediaQueryData get mediaQuery => MediaQueryData.fromWindow(ui.window);
+
+  /// The number of device pixels for each logical pixel.
+  /// 设备每个逻辑像素对应的dp比例
+  static double get scale => mediaQuery.devicePixelRatio;
+
+  /// The horizontal extent of this size.
+  /// 水平范围的大小
+  static double get width => mediaQuery.size.width;
+
+  /// The horizontal pixels of this size.
+  /// 水平范围的像素值
+  static int get widthPixels => (width * scale).toInt();
+
+  /// The vertical extent of this size.
+  /// 垂直范围的大小
+  static double get height => mediaQuery.size.height;
+
+  /// The vertical pixels of this size.
+  /// 垂直范围的像素值
+  static int get heightPixels => (height * scale).toInt();
+
+  /// Top offset in the [ui.window], usually is the notch size.
+  /// 从 [ui.window] 获取的顶部偏移（间距），通常是刘海的大小。
+  static double get topSafeHeight => mediaQuery.padding.top;
+
+  /// Bottom offset in the [ui.window], usually is the action bar/navigation bar size.
+  /// 从 [ui.window] 获取的底部偏移（间距），通常是操作条/导航条的大小。
+  static double get bottomSafeHeight => mediaQuery.padding.bottom;
+
+  /// Height exclude top and bottom safe height.
+  /// 去除顶部和底部安全区域的高度
+  static double get safeHeight => height - topSafeHeight - bottomSafeHeight;
+
+  /// Method to update status bar's style.
+  /// 更新状态栏样式的方法
+  static void updateStatusBarStyle(SystemUiOverlayStyle style) {
+    SystemChrome.setSystemUIOverlayStyle(style);
+  }
+
+  /// Scale factor for the text.
+  /// 文字缩放的倍数
+  static double get textScaleFactor => mediaQuery.textScaleFactor;
+
+  /// Return a fixed font size according to text scale factor.
+  /// 根据文字缩放计算出的固定文字大小
+  static double fixedFontSize(double fontSize) => fontSize / textScaleFactor;
+}

lib/src/widget/builder/audio_page_builder.dart

@@ -77,7 +77,7 @@ class _AudioPageBuilderState extends State<AudioPageBuilder> {
   Future<void> openAudioFile() async {
     try {
       final String url = await widget.asset.getMediaUrl();
-      assetDuration = widget.asset.duration.seconds;
+      assetDuration = Duration(seconds: widget.asset.duration);
       _controller = VideoPlayerController.network(url);
       await _controller.initialize();
       _controller.addListener(audioPlayerListener);

lib/src/widget/fixed_appbar.dart

@@ -6,7 +6,6 @@ import 'dart:ui' as ui;
 
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
-import 'package:flutter_common_exports/flutter_common_exports.dart';
 
 import '../constants/constants.dart';
 

lib/src/widget/platform_progress_indicator.dart

@@ -0,0 +1,50 @@
+///
+/// [Author] Alex (https://github.com/AlexV525)
+/// [Date] 2020/8/19 10:36
+///
+import 'dart:io';
+
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+
+/// Progress Indicator. Used in loading data.
+class PlatformProgressIndicator extends StatelessWidget {
+  const PlatformProgressIndicator({
+    Key key,
+    this.strokeWidth = 4.0,
+    this.radius = 10.0,
+    this.size = 48.0,
+    this.color,
+    this.value,
+    this.brightness,
+  }) : super(key: key);
+
+  final double strokeWidth;
+  final double radius;
+  final double size;
+  final Color color;
+  final double value;
+  final Brightness brightness;
+
+  bool get isAppleOS => Platform.isIOS || Platform.isMacOS;
+
+  @override
+  Widget build(BuildContext context) {
+    return SizedBox.fromSize(
+      size: Size.square(size),
+      child: isAppleOS
+          ? CupertinoTheme(
+              data: CupertinoThemeData(
+                brightness: brightness ?? Brightness.dark,
+              ),
+              child: CupertinoActivityIndicator(radius: radius),
+            )
+          : CircularProgressIndicator(
+              strokeWidth: strokeWidth,
+              valueColor:
+                  color != null ? AlwaysStoppedAnimation<Color>(color) : null,
+              value: value,
+            ),
+    );
+  }
+}

pubspec.yaml

@@ -12,7 +12,6 @@ dependencies:
     sdk: flutter
 
   extended_image: ^1.0.0
-  flutter_common_exports: ^0.1.0
   photo_manager: ^0.5.7
   provider: ^4.3.1
   video_player: ^0.10.11+2