警告:该android.dexOptions.incremental属性已弃用,它对构建过程没有影响./home/midhilaj/.gradle/caches/transforms-1/files-1.1/appcompat-v7-26.1.0.aar/be3106efb0df111fe5a3f7b356dd070b/res/values/values.xml错误:(246,5)错误:资源android:attr/fontVariationSettings未找到./project/bkup/7_march_2018/hyshoper/milla/build/intermediates/incremental/mergeDebugAndroidTestResources/merged.dir/values/values.xml错误:(246,5)错误:找不到资源android:attr/ttcIndex.错误:(269)资源android:attr/ttcIndex未找到.错误:(269)资源android:attr/fontVariationSettings未找到.错误:java.util.concurrent.ExecutionException:java.util.concurrent.ExecutionException:com.android.tools.aapt2.Aapt2Exception:AAPT2错误:检查日志以获取详细信息错误:链接引用失败.错误:java.util.concurrent.ExecutionException:com.android.tools.aapt2.Aapt2Exception:AAPT2错误:检查日志以获取详细信息错误:com.android.tools.aapt2.Aapt2Exception:AAPT2错误:检查日志以获取详细信息错误:执行失败for task':milla:processDebugAndroidTestResources'.

无法执行aapt信息:9错误信息:2秒内建立失败信息:1警告信息:在控制台中查看完整输出

如何解决这个问题？我的依赖

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })


    compile 'de.hdodenhof:circleimageview:2.2.0'



    compile('com.alibaba.android:ultraviewpager:1.0.6.1@aar') {
        transitive = true
    }
    compile('org.apache.httpcomponents:httpmime:4.3.6') {
        exclude module: 'httpclient'
    }
    compile 'com.synnapps:carouselview:0.1.4'
    compile 'com.sun.mail:android-mail:1.5.5'
    compile 'com.sun.mail:android-activation:1.5.5'
    implementation 'com.muddzdev:styleabletoast:2.0.2'
    compile 'javax.annotation:javax.annotation-api:1.2'




    compile 'me.grantland:autofittextview:0.2.+'
    // base library
     //slider
    compile 'com.ss.bannerslider:bannerslider:1.8.0'
    //noinspection GradleCompatible
    compile 'jp.wasabeef:recyclerview-animators:2.2.7'
    compile 'com.android.support:multidex:1.0.1'
    compile 'com.squareup.picasso:picasso:2.5.2'
    compile 'com.google.code.gson:gson:2.6.2'
    compile 'com.github.satyan:sugar:1.4'
    compile 'com.android.support:multidex:1.0.1'
    compile 'com.squareup.picasso:picasso:2.5.2'
    compile 'com.android.support:percent:26.1.0'
    compile 'com.google.code.gson:gson:2.6.2'
    compile 'com.github.satyan:sugar:1.4'
    compile 'jp.wasabeef:recyclerview-animators:2.2.6'
    compile 'pl.droidsonroids.gif:android-gif-drawable:1.1.+'
    compile …

我们安装角火力基地

npm install firebase angularfire2 --save

而且这个错误发生了

ERROR in node_modules/angularfire2/firebase.app.module.d.ts(10,22): error TS2420: Class 'FirebaseApp' incorrectly implements interface 'FirebaseApp'.
Property 'automaticDataCollectionEnabled' is missing in type 'FirebaseApp'.

我怎么解决呢？

我是新手，没有太多经验。
我正在尝试使用 flutter 开发一个 android 应用程序，这是我以前的应用程序设计。

而且我也能够在颤动中成功制作网格视图，但列高是问题所在。他们的任何人都可以帮助我处理我的颤振代码。

 class MyHomePage extends StatelessWidget {

  @override
   Widget build(BuildContext context) {
     hi(){

    }
     return new Scaffold(

         appBar: new AppBar(
           actions: <Widget>[],
                title: new Text("milla"),
              ),
       body: new Container(


         child: new Center(

            child: new GridView.count(
              shrinkWrap: true,
              scrollDirection: Axis.vertical,
              childAspectRatio:1.0,
              crossAxisCount: MediaQuery.of(context).size.width <= 400.0 ? 3 : MediaQuery.of(context).size.width >= 1000.0 ? 5 : 4,

           // Create a grid with 2 columns. If you change the scrollDirection to
           // horizontal, this would produce 2 rows.

           crossAxisSpacing: …

添加 gitlab 后，我的 flutter 项目无法运行，代码无法运行 Android 应用程序。所以，我重新启动我的 Linux 电脑并再次尝试，现在它显示了此错误消息

Java 服务器的语言支持在过去 3 分钟内崩溃了 5 次。服务器不会重新启动。

知道如何解决这个问题吗？

找不到名为“track-widget-creation”的选项。

运行“flutter -h”（或“flutter -h”）以获取可用的 flutter 命令和选项。Gradle 任务 assembleDebug 失败，退出代码为 1

是否有任何库可用于保存对象并恢复它。
在android java中，我们使用Gson来做到这一点，但在flutter中没有Gson

这是我的代码，从这里复制：

SliverAppBar(
  expandedHeight: 150.0,
  flexibleSpace: const FlexibleSpaceBar(
      title: Text('Available seats'),
    ),
    actions: < Widget > [
      IconButton(
        icon: const Icon(Icons.add_circle),
          tooltip: 'Add new entry',
          onPressed: () { /* ... */ },
      ),
    ]
)

但我需要添加一个Drawer. 我怎样才能做到这一点？
我正在尝试在 Flutter 中重建我的应用程序。
将java android应用程序转换为flutter

我更换了图标，但如何创建一个Drawer？

leading: IconButton(icon: Icon( Icons.menu ),onPressed: ()=>{},)

我的完整代码

@override
  Widget build(BuildContext context) {

  return NestedScrollView(
      headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) {
        return <Widget>[
          SliverAppBar(
            leading: IconButton(
              icon: Icon(Icons.menu),
              onPressed: () => {},
            ), …

我需要制作容器边缘圆，以及当我尝试 RoundedRectangleBorder 时如何做到这一点，它显示错误

 Container(
      width: 100,height: 100,
      margin: EdgeInsets.all(10.0),
      decoration: BoxDecoration(
         color: Colors.orange,
         shape: RoundedRectangleBorder(
            borderRadius: new BorderRadius.circular(18.0),
         )
      ),
 ),

安装Ubuntu 18在带有i7和24gb ram的新桌面后.我们尝试将我们的android studio项目以zip格式移动到新的电脑上,我们的项目在旧电脑上正常工作,但它在新电脑上显示错误.

org.gradle.api.tasks.TaskExecutionException:任务':app:transformNativeLibsWithStripDebugSymbolForDebug'的执行失败.在在org.gradle在org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:70)org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:100) .api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:63)在org.gradle.api.internal.tasks.execution.ResolveTaskOutputCachingStateExecuter.execute(ResolveTaskOutputCachingStateExecuter.java:54)在org.gradle.api.internal位于org.gradle.api.internal.tasks.execution的org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:88).tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:58) .ResolveTaskArtifactStateTaskExecuter.execute(ResolveTaskArtifactStateTaskExecuter.java:52)在org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:52)在org.gradle.api.internal.tasks 在org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter的org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43)的.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:54) .execute(CatchExceptionTaskExecuter.java:34)org.gradle.execution.taskgraph.DefaultTaskGraphExecuter $ EventFiringTaskWorker $ 1.run(DefaultTaskGraphExecuter.java:248)org.gradle.internal.progress.DefaultBuildOperationExecutor $ RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java: 336)org.gradle.internal.progress.DefaultBuildOperationExecutor $ RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:197)org.gradle.internal.progress .DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:107)at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter $ EventFiringTaskWo rker.execute(DefaultTaskGraphExecuter.java:241)org.gradle.execution.taskgraph.DefaultTaskGraphExecuter $ EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:230)at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor $ TaskExecutorWorker.processTask(DefaultTaskPlanExecutor.java: 124)在org.gradle.execution.taskgraph.DefaultTaskPlanExecutor $ $ TaskExecutorWorker.access 200(DefaultTaskPlanExecutor.java:80)在org.gradle.execution.taskgraph.DefaultTaskPlanExecutor $ $ TaskExecutorWorker 1.execute(DefaultTaskPlanExecutor.java:105)在org.gradle .execution.taskgraph.DefaultTaskPlanExecutor $ TaskExecutorWorker $ 1.execute(DefaultTaskPlanExecutor.java:99)org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.execute(DefaultTaskExecutionPlan.java:625)at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.executeWithTask( DefaultTaskExecutionPlan.java:580)org.gradle.int上的org.gradle.execution.taskgraph.DefaultTaskPlanExecutor $ TaskExecutorWorker.run(DefaultTaskPlanExecutor.java:99)ernal.concurrent.ExecutorPolicy $ CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)在org.gradle.internal.concurrent.ManagedExecutorImpl $ 1.run(ManagedExecutorImpl.java:46)在java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java :1142)在java.util.concurrent.ThreadPoolExecutor中$ Worker.run(ThreadPoolExecutor.java:617)在org.gradle.internal.concurrent.ThreadFactoryImpl $ ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)在java.lang.Thread中. run(Thread.java:745)引起:org.gradle.process.internal.ExecException:启动进程'command'/ home/developer/Android/Sdk/ndk-bundle/toolchains/mips64el-linux-android-时出现问题4.9 /预建/ Linux的x86_64的/ bin中/ mips64el-Linux的机器人条 '' 在org.gradle.process.internal.DefaultExecHandle.execExceptionFor(DefaultExecHandle.java:220)在org.gradle.process.internal.DefaultExecHandle.setEndStateInfo (DefaultExecHandle.java:204)org.gradle.process.internal.DefaultExecHandle.failed(DefaultExecHandle.java:340)at或 net.rubygrapefruit.platform:g.gradle.process.internal.ExecHandleRunner.run(ExecHandleRunner.java:86)在org.gradle.internal.operations.BuildOperationIdentifierPreservingRunnable.run(BuildOperationIdentifierPreservingRunnable.java:39)... 6个所致.NativeException:无法启动"/home/developer/Android/Sdk/ndk-bundle/toolchains/mips64el-linux-android-4.9/prebuilt/linux-x86_64/bin/mips64el-linux-android-strip"在net.rubygrapefruit位于org.gradle.process.internal.ExecHandleRunner.run(ExecHandleRunner.java)的net.rubygrapefruit.platform.internal.WrapperProcessLauncher.start(WrapperProcessLauncher.java:36)中的.platform.internal.DefaultProcessLauncher.start(DefaultProcessLauncher.java:27) :68)... 7更多引起:java.io.IOException:无法运行程序"/home/developer/Android/Sdk/ndk-bundle/toolchains/mips64el-linux-android-4.9/prebuilt/linux-x86_64/ bin/mips64el-linux-android-strip"(在目录"/ home/developer/Documents/working_app/valyangadi_firebase_project/app"中):error = 2,No s java.lang.ProcessBuilder.start(ProcessBuilder.java:1048)中的uch文件或目录,网址为net.rubygrapefruit.platform.internal.DefaultProcessLauncher.start(DefaultProcessLauncher.java:25)... 9更多引起:java.io. IOException:error = …

在listview中添加gridview时如何解决flutter布局中的滚动问题。
在android studio java中我们使用NestedScrollView来解决这类问题
flutter的解决方案是什么？
我需要使用自定义视图和网格视图继续滚动列表视图，不会出现任何问题。
现在 gridview 只允许滚动 gridview
如果我滚动网格视图然后顶部 imageview 不滚动。如何解决这个问题？

body: 
    ListView(
  children: <Widget>[
    new Image.network("https://www.gizbot.com/img/2013/11/23-weekend-deals-top-10-latest-smartphones.jpg"),
    Container(
    height: 300.0,
    child: GridView.count(
      crossAxisCount: 3,
      childAspectRatio: .6,
      children: _list.map((p) => ProductManagment(p)).toList(),
    ),
  ) 
  ],
)

添加@deniss 答案后

解决了

在我的代码中：

final cameras = await availableCameras();
  // Get a specific camera from the list of available cameras.
  final firstCamera = cameras.first;

包裹 ：

import 'package:camera/camera.dart';

未处理的异常：错误状态：没有元素

0 List.first (dart:core-patch/growable_array.dart:220:5)

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>NSCameraUsageDescription</key>
<string>Can I use the camera please?</string>
<key>NSMicrophoneUsageDescription</key>
<string>Can I use the mic please?</string>

已解决的问题
在 IOS 模拟器中相机不可用