The parameter 'icon' can't have a value of 'null' because of its type, but the implicit default value is 'null'. (Documentation) Try adding either an explicit non-'null' default value or the 'required' modifier. 二、解决方案 这是由于 Flutter SDK 版本升级 , 对语法的检查变得更加严格 ,...
var s = r'In a raw string, not even \n gets special treatment.'; // 代码中文解释 var s = r'在 raw 字符串中,转义字符串 \n 会直接输出 “\n” 而不是转义为换行。'; 你可以查阅 Runes 与 grapheme clusters 获取更多关于如何在字符串中表示 Unicode 字符的信息。 字符串字面量是一个编译时...
Now, you can use required AppGallery Connect services in Flutter.Setting Parameters Using the Configuration File (only for Android Apps) The AppGallery Connect SDK provides the agconnect_core plugin to configure parameters in the agconnect-services.json file. If you have selected Do not includ...
engine.stopListening(); engine.setParameter(SDKConstant.Parameter.PARAMERER_ORAL_TESTING, "on"); engine.setParameter(SDKConstant.Parameter.PARAMERER_AI_CONTEXTS, ""); engine.setCloudResultListener(new OnCloudResultListener() { @Override public void onResult(int i, String s) { Log.d(TAG, "onRead...
bool hitTest(HitTestResult result, { @required Offset position }) { ///…去掉assert部分 ///这里就是判断点击的区域置是否在size范围,是否在当前这个RenderObject节点上 if (_size.contains(position)) { ///在当前节点,如果child与自己的hitTest命中测试有一个是返回true,就加入到HitTestResult中 ...
Parameter Definition Valid for One-to-One Chat Valid for Group Chat Description id ID returned after message creation YES YES Create the message using the `createXxxMessage` API in advance. receiver `userID` of the one-to-one message receiver. YES NO Just specify `receiver` for sendi...
Sorry for not being clear, Flutter opts-in to the NNBD preview through its analysis options (thenon-nullableexperiment) so it's use of the required keyword is perfectly valid in the current stable The underlying issue here is that IDEs do not restart the analyzer when the SDK version change...
flutter，Dart：未定义命名参数“id”Transaction的语法有点不对，如果你想要命名参数，它应该是这样的：
* Debugging must be set as a configuration parameter inAndroidManifest.xml(see below). The official segment library does not offer the debug method for Android. Example import'package:flutter/material.dart';import'package:flutter_segment/flutter_segment.dart';voidmain()=>runApp(MyApp());classMy...
<uses-permissionandroid:name="android.permission.NFC"/><uses-featureandroid:name="android.hardware.nfc"android:required="true"/> Assign 19 in minSdkVersion in thebuild.gradle (Module: app) defaultConfig { ... minSdkVersion19... } iOS Setup ...