小编Ahm*_*raf的帖子

当我尝试构建 APK 时，调试控制台中显示以下内容。构建：构建失败，出现异常

/C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_datetime_picker-1.3.8/lib/src/datetime_picker_theme.dart:6:28: 错误：未找到类型“DiagnosticableMixin”。类 DatePickerTheme 与 DiagnosticableMixin { ^^^^^^^^^^^^^^^^^^^ /C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.17 .4/lib/src/picture_stream.dart:88:26: 错误：未找到类型“DiagnosticableMixin”。带有 DiagnosticableMixin 的 PictureStream 类 { ^^^^^^^^^^^^^^^^^^^ /C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.17 .4/lib/src/picture_stream.dart:192:44：错误：未找到类型“DiagnosticableMixin”。抽象类 PictureStreamCompleter 与 DiagnosticableMixin { ^^^^^^^^^^^^^^^^^^^ /C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_datetime_picker- 1.3.8/lib/src/datetime_picker_theme。dart:6:7: 错误：类型“DiagnosticableMixin”不能混入。带有DiagnosticableMixin 的类DatePickerTheme { ^ /C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg -0.17.4/lib/src/picture_stream.dart:88:7: 错误：类型“DiagnosticableMixin”不能混入。带有DiagnosticableMixin 的PictureStream 类{ ^ /C:/src/flutter/flutter/.pub- cache/hosted/pub.dartlang.org/flutter_svg-0.17.4/lib/src/picture_stream.dart:192:16: 错误：类型“DiagnosticableMixin”不能混入。抽象类PictureStreamCompleter 和DiagnosticableMixin { ^ / C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.17.4/lib/src/picture_stream.dart:167:11: 错误：超类没有名为“debugFillProperties”的方法. super.debugFillProperties(properties); ^^^^^^^^^^^^^^^^^^^ /C:

'PictureStreamCompleter' 来自 'package:flutter_svg/src/picture_stream.dart' ('/C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.17.4/lib/src /picture_stream.dart'）。尝试将名称更正为现有方法的名称，或定义名为“toStringShort”的方法。ifPresent: _completer?.toStringShort(), ^^^^^^^^^^^^^ /C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.17.4 /lib/src/picture_stream.dart:266:11: 错误：超类没有名为“debugFillProperties”的方法。super.debugFillProperties(描述); ^^^^^^^^^^^^^^^^^^^

FAILURE：构建失败，出现异常。