Flutter:- already_active，图像选择器已经激活，null，null答案

【问题标题】：Flutter:- already_active, Image picker is already active, null, nullFlutter:- already_active，图像选择器已经激活，null，null
【发布时间】：2021-06-19 19:06:26
【问题描述】：

每次我在发布模式下按选择图像时都会显示此错误

E/flutter (24004): [ERROR:flutter/lib/ui/ui_dart_state.cc(186)] Unhandled Exception: PlatformException(already_active, Image picker is already active, null, null)
E/flutter (24004): #0      StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:581)
E/flutter (24004): #1      MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:158)
E/flutter (24004): <asynchronous suspension>
E/flutter (24004): #2      MethodChannelImagePicker.pickImage (package:image_picker_platform_interface/src/method_channel/method_channel_image_picker.dart:29)
E/flutter (24004): <asynchronous suspension>
E/flutter (24004): #3      _UploadDataCardState.getImage (package:visual_retail/screens/FillData/UploadDataCard.dart:164)
E/flutter (24004): <asynchronous suspension>
E/flutter (24004):

在调试模式下它工作正常

【问题讨论】：

标签： firebase flutter dart flutter-dependencies flutter-image

【解决方案1】：

将 Gradle 版本降级为：classpath 'com.android.tools.build:gradle:3.5.4'

【讨论】：