我正在研究将简单的开源Android图表工具转换为Flutter的可行性。看一些Android图表工具，我发现他们可能会使用以下Android导入。
接下来，我试图找出Flutter类，这些类非常粗略地和松散地对应于Android类。大多数都是通过名字来看，我发现这个粗略的映射。
有人能够指出我在带问号的行上的Flutter课吗？ （关于填充线的评论也很棒）
| Android | Flutter | Comment | Android API | Flutter API | |-------------------------------------+-----------------+---------+---------------------------------------------------------------------------------+------------------------------------------------------------| | android.content.Context; | ? | | https://developer.android.com/reference/android/content/Context.html | ? | | android.util.AttributeSet; | ? | | https://developer.android.com/reference/android/util/AttributeSet.html | ? | | android.graphics.Color; | dart:ui.Color | | https://developer.android.com/reference/android/graphics/Color.html | https://docs.flutter.io/flutter/dart-ui/Color-class.html | | android.graphics.Canvas; | dart:ui.Canvas | | https://developer.android.com/reference/android/graphics/Canvas.html | https://docs.flutter.io/flutter/dart-ui/Canvas-class.html | | android.graphics.Rect; | dart:ui.Rect | | https://developer.android.com/reference/android/graphics/Rect.html | https://docs.flutter.io/flutter/dart-ui/Rect-class.html | | android.graphics.Point; | dart:math.Point | | https://developer.android.com/reference/android/graphics/Point.html | https://docs.flutter.io/flutter/dart-math/Point-class.html | | android.graphics.Paint; | dart:ui.Paint | | https://developer.android.com/reference/android/graphics/Paint.html | https://docs.flutter.io/flutter/dart-ui/Paint-class.html | | android.graphics.Region; | ? | | https://developer.android.com/reference/android/graphics/Region.html | ? | | android.graphics.drawable.Drawable; | ? Picture ? | | https://developer.android.com/reference/android/graphics/drawable/Drawable.html | ? | | android.view.View; | ? Viewport ? | | https://developer.android.com/reference/android/view/View.html | ? |
答案 0 :(得分：0)
在图形应用程序的Android-＆gt; Flutter代码转换期间，我最终使用了以下类的映射。除了我最终不需要的AttributeSet之外，每个都有或多或少的相应类。
| Android | Flutter | Comment | |---------------------------------------+------------------------------------------+-----------------------------------------------------------------| | android.content.Context; | package:flutter:widgets.BuildContext | somewhat equivalent | | android.util.AttributeSet; | ? | | | android.graphics.Color; | dart:ui.Color | import 'dart:ui' as ui; // in code: ui.Color | | android.graphics.Canvas; | dart:ui.Canvas | | | android.graphics.Rect; | dart:ui.Rect | For operations such as "contains(Offset)" etc | | android.graphics.Point; | dart:ui.Offset (*not* dart:math.Point) | Offset in context of graphics | | android.graphics.Paint; | dart:ui.Paint | | | android.graphics.Region; | dart:ui.Rect | | | android.graphics.drawable.Drawable; | used CustomPaint - see line below | | | android.view.View; impl Drawable | package:flutter/widgets.dart.CustomPaint | import 'package:flutter/widgets.dart' as widgets; | | - (continuation line) | - combined with CustomPainter | - in code: widgets.CustomPaint, widgets.CustomPainter | | android.graphics.Path | dart:ui.Path | | | android.graphics.PathEffect | Needed for dash-lines. | there is no dash-lines effect in Dart, intentional, performance | | android.Text (when drawing on Canvas) | package:flutter/painting.dart.TextSpan | import package:flutter/painting.dart'; | | - (continuation line) | - *not* widgets.Text | - there are multiple *Text* classes in Dart. | | | | - TextSpan is for drawing text on Canvas. |