小编Abi*_*san的帖子

我的 flutter 应用程序未安装在 Android 12 版本上。我尝试过android:exported，但没有任何效果。它向我展示了这种类型的错误-

\xe2\x9c\x93  Built build/app/outputs/flutter-apk/app-debug.apk.\nInstalling build/app/outputs/flutter-apk/app.apk...                 3.3s\nError: ADB exited with exit code 1\nPerforming Streamed Install\n\nadb: failed to install /Users/abir/Documents/Office\nWork/MediMate-App-Old-Version/build/app/outputs/flutter-apk/app.apk: Failure\n[INSTALL_PARSE_FAILED_MANIFEST_MALFORMED: Failed parse during installPackageLI:\n/data/app/vmdl489268217.tmp/base.apk (at Binary XML file line #125):\nio.flutter.plugins.firebasemessaging.FlutterFirebaseMessagingService: Targeting S+ (version 31 and above)\nrequires that an explicit value for android:exported be defined when intent filters are present]\nError launching application on sdk gphone64 x86 64.\n

这是我的AndroidManifest.xml文件

<manifest xmlns:android="http://schemas.android.com/apk/res/android"\n    package="care.example.health">\n    <uses-permission android:name="android.permission.READ_PHONE_STATE"/>\n    <uses-permission android:name="android.permission.INTERNET" />\n    <uses-permission android:name="android.permission.RECORD_AUDIO" />\n    <uses-permission …

我想通过多部分文件请求上传图像。使用此代码当我传递两个图像文件时，它工作正常。但是，当我想传递一个图像文件而另一个图像文件为空时，它就不起作用。哪里有问题？我该如何解决这个问题？

这是我的代码 -

Future<Map<String, dynamic>> updateprofile(
      UpdateProfileInfo updateProfileInfo,
      File imageFile,
      File signatureFile) async {

    String url = "$baseAPIUrl/update-profile-info";
    String _token = await SavedData().loadToken();
    String authorization = "Bearer $_token";

    final headers = {
      'Content-Type': 'application/json',
      'Accept': 'application/json',
      "Authorization": authorization
    };

    var request = http.MultipartRequest("POST", Uri.parse(url));

    request.headers.addAll(headers);
    request.fields.addAll(updateProfileInfo.toJson());

    request.files
        .add(await http.MultipartFile.fromPath('image', imageFile.path));
    request.files.add(
        await http.MultipartFile.fromPath('signature', signatureFile.path));

    print(" Update Profile Json ${updateProfileInfo.toJson()}");
    print("Request Fields ${request.fields}");
    http.StreamedResponse response = await request.send();

    String respStr = await response.stream.bytesToString();
    dynamic respJson;

    try {
      respJson = jsonDecode(respStr);
    } …

Flutter 虚拟应用程序会产生问题。

我创建了一个新应用程序并在 Android 真实设备上运行它。它在终端上不断地向我展示一个问题，例如

Performing hot restart...                                               
Restarted application in 1,415ms.
E/VpsExtension( 3820): Failed to get binder for service "vendor.vpsservice"
E/VpsExtension( 3820): Failed to get binder for service "vendor.vpsservice"
E/VpsExtension( 3820): Failed to get binder for service "vendor.vpsservice"
E/VpsExtension( 3820): Failed to get binder for service "vendor.vpsservice"
E/VpsExtension( 3820): Failed to get binder for service "vendor.vpsservice"
E/VpsExtension( 3820): Failed to get binder for service "vendor.vpsservice"
E/VpsExtension( 3820): Failed to get binder for service "vendor.vpsservice"
E/VpsExtension( 3820): Failed to get …

当我使用 GetX 状态管理时，Flutter 默认本地化不起作用。它向我显示一个错误，例如

Undefined name 'AppLocalizations'.
Try correcting the name to one that is defined, or defining the name.

我该如何解决这个问题？

在 iOS 上添加 firebase 依赖项后，当我想运行时，出现此错误

Xcode's output:\n\xe2\x86\xb3\n    ../ios/Runner/GeneratedPluginRegistrant.m:10:9: fatal error: module\n    'firebase_analytics' not found\n    @import firebase_analytics;\n     ~~~~~~~^~~~~~~~~~~~~~~~~~\n    1 error generated.\n    note: Using new build system\n    note: Building targets in parallel\n    note: Planning build\n    note: Constructing build description\n\nCould not build the precompiled application for the device.\n\nError launching application on Abir's iPhone.\n

我已经尝试了很多方法。如删除 pod 文件、pod 更新、pod 安装等。

我想使用flutter_share_me 0.9.1插件。String.xml但我在项目文件夹中找不到文件

。

该项目于今年一月前完美建成。但现在它告诉我错误。首先他们向我显示位置 16+ 错误。然后我将位置包更改为地理定位器。但不固定。然后创建新项目并导入旧代码库。并且还将 target 和compilesdk 更改为 31。并取消注释compileOptions

这是我的应用程序级别 build.gradle-

def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
    localPropertiesFile.withReader('UTF-8') { reader ->
        localProperties.load(reader)
    }
}

def flutterRoot = localProperties.getProperty('flutter.sdk')
if (flutterRoot == null) {
    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
}

def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
    flutterVersionCode = '1'
}

def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
    flutterVersionName = '1.0'
}

apply …

我用于setState(() {})为变量赋值。但它一次又一次地打印。为什么会有这样的反应？我该如何解决？

这是我的代码：

class Sample extends StatefulWidget {
  @override
  _SampleState createState() => _SampleState();
}

class _SampleState extends State<Sample> {
  String _message;
  String _appLink;
  Firestore db = Firestore.instance;
  @override
  Widget build(BuildContext context) {
    db.collection('share').document('0').get().then((value) {
      var message = value.data['message'];
      print(message);
      var appLink = value.data['appLink'];
      setState(() {
        _message = message;
        _appLink = appLink;
      });
    });
    return Container(
      child: Text('$_message $_appLink'),
    );
  }
}

这是我的输出：

这里的_appLink价值是www.facebook.com

我想通过单击 AppBar 的 来隐藏我的图像容器IconButton。但我的 AppBarIconButton不起作用。 我想，我的代码犯了一个错误......

import 'package:flutter/material.dart';
import 'package:icon_shadow/icon_shadow.dart';

class HomePage extends StatefulWidget {
  @override
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  @override
  Widget build(BuildContext context) {
    bool viewVisible = true;

  /*  void showWidget() {
      setState(() {
        viewVisible = true;
      });
      print("Pressed");
    }
*/
    void hideWidget() {
      setState(() {
        viewVisible = false;
        print("Work");
      });
    }


    return SafeArea(
      child: Scaffold(
          appBar: AppBar(
            title: Text("Icon & Image Shadow Demo"),
            actions: <Widget>[
              IconButton(
                icon: …

我想运行一个现有的项目。它完全在 Android 12 下运行，但是当我要运行 Android 12 版本的三星手机时。然后我收到此类错误。

错误 ：

\xe2\x9c\x93  Built build/app/outputs/flutter-apk/app-release.apk (104.1MB).\nInstalling build/app/outputs/flutter-apk/app.apk...                 3.3s\nError: ADB exited with exit code 1\nPerforming Streamed Install\n\nadb: failed to install /Users/abir/Documents/Office\nWork/appName-App-Old-Version/build/app/outputs/flutter-apk/app.apk: Failure\n[INSTALL_PARSE_FAILED_MANIFEST_MALFORMED: Failed parse during installPackageLI:\n/data/app/vmdl2043233695.tmp/base.apk (at Binary XML file line #124):\nio.flutter.plugins.firebasemessaging.FlutterFirebaseMessagingService: Targeting S+\n(version 31 and above) requires that an explicit value for android:exported be\ndefined when intent filters are present]\nError running application on SM G781B.\n

这是我的AndroidManifest.xml文件：

<manifest xmlns:android="http://schemas.android.com/apk/res/android"\n    package="care.appname.health">\n    <uses-permission android:name="android.permission.READ_PHONE_STATE"/>\n    <uses-permission android:name="android.permission.INTERNET" />\n    <uses-permission android:name="android.permission.RECORD_AUDIO" />\n    <uses-permission …

我在我的 flutter 应用程序上使用Getxpackage。我想更新一个双精度值。但它告诉我一个错误。

这是我的 gextController

class CustomWebViewCTRL extends GetxController {
 
  RxDouble progress = 0.0.obs;

  onProgress(pro) {
    progress = (pro / 100);
  }
}

然后我尝试在主屏幕上调用Obx(()=>)它GetBuilder。没有人为我工作。它说的是——

“参数类型‘RxDouble’不能分配给参数类型‘double’？”

这是一个示例（我想使用的地方）：

GetBuilder<CustomWebViewCTRL>(builder: (controller) {
            return LinearProgressIndicator(
              value: controller.progress,
              color: Colors.black,
              backgroundColor: Colors.amber,
              valueColor: const AlwaysStoppedAnimation<Color>(Colors.green),
            );
          }),

我该如何解决这个问题？