无法从API检索信息初学者程序员

如何解决无法从API检索信息初学者程序员

首先，我不是开发人员，这是我第一次为这种复杂性编写代码（至少对我而言）。任何帮助/指导将不胜感激。

该程序的目的是在输入名称后从API URL中检索员工用户ID（或签名）。

1. 我创建了一个名为WebAPI的文件夹，该文件夹将访问API并检索所需的信息。 （请参见代码）

   08-12 18:40:27.528 25856 25856 E AndroidRuntime: com.facebook.react.bridge.NoSuchKeyException: label
   08-12 18:40:27.528 25856 25856 E AndroidRuntime:        at com.facebook.react.bridge.ReadableNativeMap.getNullableValue(ReadableNativeMap.java:123)
   08-12 18:40:27.528 25856 25856 E AndroidRuntime:        at com.facebook.react.bridge.ReadableNativeMap.getNullableValue(ReadableNativeMap.java:127)
   08-12 18:40:27.528 25856 25856 E AndroidRuntime:        at com.facebook.react.bridge.ReadableNativeMap.getString(ReadableNativeMap.java:162)
   08-12 18:40:27.528 25856 25856 E AndroidRuntime:        at com.reactnativecommunity.picker.ReactPickerManager$ReactPickerAdapter.getView(ReactPickerManager.java:146)
   08-12 18:40:27.528 25856 25856 E AndroidRuntime:        at com.reactnativecommunity.picker.ReactPickerManager$ReactPickerAdapter.getView(ReactPickerManager.java:127)
   08-12 18:40:27.528 25856 25856 E AndroidRuntime:        at android.widget.AbsSpinner.onMeasure(AbsSpinner.java:204)
   08-12 18:40:27.528 25856 25856 E AndroidRuntime:        at android.widget.Spinner.onMeasure(Spinner.java:602)
   08-12 18:40:27.528 25856 25856 E AndroidRuntime:        at androidx.appcompat.widget.AppCompatSpinner.onMeasure(AppCompatSpinner.java:428)
   08-12 18:40:27.528 25856 25856 E AndroidRuntime:        at android.view.View.measure(View.java:23355)
   08-12 18:40:27.528 25856 25856 E AndroidRuntime:        at com.reactnativecommunity.picker.ReactPicker$2.run(ReactPicker.java:76)
   08-12 18:40:27.528 25856 25856 E AndroidRuntime:        at android.os.Handler.handleCallback(Handler.java:873)
   08-12 18:40:27.528 25856 25856 E AndroidRuntime:        at android.os.Handler.dispatchMessage(Handler.java:99)
   08-12 18:40:27.528 25856 25856 E AndroidRuntime:        at android.os.Looper.loop(Looper.java:193)
   08-12 18:40:27.528 25856 25856 E AndroidRuntime:        at android.app.ActivityThread.main(ActivityThread.java:6898)
   08-12 18:40:27.528 25856 25856 E AndroidRuntime:        at java.lang.reflect.Method.invoke(Native Method)
   08-12 18:40:27.528 25856 25856 E AndroidRuntime:        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:537)
   08-12 18:40:27.528 25856 25856 E AndroidRuntime:        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime: FATAL EXCEPTION: main
   08-12 18:40:46.297 26173 26173 E AndroidRuntime: Process: com.linkmood.app,PID: 26173
   08-12 18:40:46.297 26173 26173 E AndroidRuntime: java.lang.RuntimeException: java.net.ConnectException: Failed to connect to localhost/127.0.0.1:8081
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.reactnativenavigation.viewcontrollers.stack.topbar.button.IconResolver$1.onError(IconResolver.java:35)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.reactnativenavigation.utils.ImageLoader.loadIcon(ImageLoader.kt:46)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.reactnativenavigation.viewcontrollers.stack.topbar.button.IconResolver.resolve(IconResolver.java:27)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.reactnativenavigation.viewcontrollers.stack.topbar.button.ButtonPresenter.loadIcon(ButtonPresenter.kt:121)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.reactnativenavigation.viewcontrollers.stack.topbar.button.ButtonPresenter.applyIcon(ButtonPresenter.kt:74)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.reactnativenavigation.viewcontrollers.stack.topbar.button.ButtonPresenter.applyOptions(ButtonPresenter.kt:43)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.reactnativenavigation.viewcontrollers.stack.topbar.button.ButtonController.addToMenu(ButtonController.kt:82)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.reactnativenavigation.viewcontrollers.stack.topbar.TopBarController.lambda$applyRightButtons$1$TopBarController(TopBarController.java:122)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.reactnativenavigation.viewcontrollers.stack.topbar.-$$Lambda$TopBarController$rlIV_MYFMKIvSNp70rm34RXTfHA.run(Unknown Source:8)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.reactnativenavigation.utils.CollectionUtils.forEachIndexed(CollectionUtils.java:130)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.reactnativenavigation.viewcontrollers.stack.topbar.TopBarController.applyRightButtons(TopBarController.java:122)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.reactnativenavigation.viewcontrollers.stack.StackPresenter.applyButtons(StackPresenter.java:280)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.reactnativenavigation.viewcontrollers.stack.StackPresenter.applyChildOptions(StackPresenter.java:140)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.reactnativenavigation.viewcontrollers.stack.StackController.onAttachToParent(StackController.java:95)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.reactnativenavigation.viewcontrollers.viewcontroller.ViewController.onGlobalLayout(ViewController.java:287)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at android.view.ViewTreeObserver.dispatchOnGlobalLayout(ViewTreeObserver.java:945)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2544)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1637)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7797)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1172)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at android.view.Choreographer.doCallbacks(Choreographer.java:984)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at android.view.Choreographer.doFrame(Choreographer.java:809)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:1158)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at android.os.Handler.handleCallback(Handler.java:873)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at android.os.Handler.dispatchMessage(Handler.java:99)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at android.os.Looper.loop(Looper.java:193)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at android.app.ActivityThread.main(ActivityThread.java:6898)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at java.lang.reflect.Method.invoke(Native Method)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:537)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime: Caused by: java.net.ConnectException: Failed to connect to localhost/127.0.0.1:8081
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.android.okhttp.internal.io.RealConnection.connectSocket(RealConnection.java:143)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.android.okhttp.internal.io.RealConnection.connect(RealConnection.java:112)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.android.okhttp.internal.http.StreamAllocation.findConnection(StreamAllocation.java:184)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.android.okhttp.internal.http.StreamAllocation.findHealthyConnection(StreamAllocation.java:126)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.android.okhttp.internal.http.StreamAllocation.newStream(StreamAllocation.java:95)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:281)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:224)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:461)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:407)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:244)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at java.net.URL.openStream(URL.java:1073)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.reactnativenavigation.utils.ImageLoader$Companion.remoteUrl(ImageLoader.kt:124)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.reactnativenavigation.utils.ImageLoader$Companion.openStream(ImageLoader.kt:119)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.reactnativenavigation.utils.ImageLoader$Companion.access$openStream(ImageLoader.kt:111)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.reactnativenavigation.utils.ImageLoader.readJsDevImage(ImageLoader.kt:81)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.reactnativenavigation.utils.ImageLoader.getDrawable(ImageLoader.kt:71)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        at com.reactnativenavigation.utils.ImageLoader.loadIcon(ImageLoader.kt:44)
   08-12 18:40:46.297 26173 26173 E AndroidRuntime:        ... 28 more
   

2. 我还创建了一个名为Employeename的类，它定义了变量（请参见代码）

   namespace TimeSheets_Try_11.Controllers
    {
        class WebAPI
        {
            public string Getsignature(string name)
            {
   
   
                var cookies = FullWebBrowserCookie.GetCookieInternal(new Uri(StaticStrings.UrlIora),false);
                WebClient wc = new WebClient();
                wc.Encoding = System.Text.Encoding.UTF8;
                wc.Headers.Add("Cookie:" + cookies);
                wc.Headers.Add("Content-Type","application/x-www-form-urlencoded");
                string uri = "";
   
   
                uri = StaticStrings.UrlIora + name;
                var response = wc.DownloadString(uri);
                Employeename status = JsonConvert.DeserializeObject<Employeename>(response);
   
   
   
                string signature = status.Signature;
                return signature;
   
   
   
            }
        }
    }
   

问题：没有可见的错误，但是，当我开始调试并在表单应用程序中输入名称时，出现错误“ System.Net.WebException：'远程服务器返回了错误：（401）未经授权“”作为行“ var response = wc.DownloadString（uri）;”在WebAPI文件夹中。