无法从本机切换到WEBVIEW_chrome显示异常：io.appium.java_client.NoSuchContextException

我正在真实设备上测试web应用程序，并使用Chrome浏览器，我尝试设置集合，同时获得本机应用程序和WEBVIEW\u Chrome，但当我尝试使用driver.context（）方法切换到WEBVIEW\u Chrome时，它引发异常“io.appium.java_client.NoSuchContextException:io.appium.java_client.NoSuchContextException:处理命令时发生未知的服务器端错误。原始错误：处理命令时发生未知的服务器端错误。原始错误：未知错误：无法将端口转发到设备18e6bebc:。未知错误：adb命令失败。额外响应：。 请帮帮我，我从上两周就开始挣扎了。提前谢谢

我尝试了amazon.in的功能和测试脚本，如下所示：

private static AndroidDriver<WebElement> driver = null;  
    @BeforeTest
    public void initConfig() throws MalformedURLException, InterruptedException {
        DesiredCapabilities capabilities = new DesiredCapabilities();
        capabilities.setCapability("deviceName", "Galaxy C9 Pro");
        capabilities.setCapability("platformVersion", "8.0.0");
    capabilities.setCapability("platformName", "Android");
        capabilities.setCapability("appPackage", "com.android.chrome");
        capabilities.setCapability("appActivity", "com.google.android.apps.chrome.Main");
        capabilities.setCapability("startIWDP", true);
        capabilities.setCapability("adbExecTimeout", 20000);
        capabilities.setCapability(MobileCapabilityType.NO_RESET, true);
driver = new AndroidDriver<WebElement>(new URL("http://127.0.0.1:4723/wd/hub"), capabilities);
driver.manage().timeouts().implicitlyWait(80, TimeUnit.SECONDS);

}

@Test
public void chromeTest() throws InterruptedException {

        System.out.println("Hello Android");
        System.out.println("Started Mobile Testing......");
        //driver.manage().timeouts().implicitlyWait(60,TimeUnit.SECONDS);
        System.out.println("start");

        System.out.println("after wait 3000----------------------------------------------");
        Set<String> context = driver.getContextHandles();
          System.out.println(context.size());

          for(String contexts : context) { System.out.println(contexts); }

          WebElement searchbar_txt = driver.findElementById("com.android.chrome:id/search_box_text");
            searchbar_txt.click();

            WebElement url_Bar = driver.findElementById("com.android.chrome:id/url_bar");

            url_Bar.sendKeys("amazon.in");

            WebElement urlhistory = driver.findElementByXPath("//*[@text='amazon.in']");
            //  findElementByName("Kotak Securities");
        urlhistory.click();
        Thread.sleep(4000);

             Set<String> context1 = driver.getContextHandles();
              System.out.println(context1.size());

              for(String contexts : context1) { System.out.println(contexts); }
             // driver.context((String) context1.toArray()[1]);

             driver.context("WEBVIEW_chrome");
              Thread.sleep(4000);

              driver.findElementById("nav-search-keywords").sendKeys("Bags");
             driver.findElementByTagName("Submit").click();

私有静态AndroidDriver=null；
@试验前
public void initConfig（）引发畸形的DurException、InterruptedException{
DesiredCapabilities=新的DesiredCapabilities（）；
能力。设置能力（“deviceName”、“Galaxy C9 Pro”）；
能力。设置能力（“平台版”、“8.0.0”）；
能力。设置能力（“平台名”、“安卓”）；
setCapability（“appPackage”、“com.android.chrome”）；
setCapability（“appActivity”、“com.google.android.apps.chrome.Main”）；
能力。设置能力（“startIWDP”，真）；
能力。设置能力（“adbExecTimeout”，20000）；
能力。设置能力（MobileCapabilityType.NO_RESET，true）；
驱动程序=新的AndroidDriver（新的URL（“http://127.0.0.1:4723/wd/hub(能力),；
driver.manage（）.timeouts（）.implicitlyWait（80，TimeUnit.SECONDS）；
}
@试验
public void chromeTest（）引发中断异常{
System.out.println（“Hello Android”）；
System.out.println（“启动移动测试……”）；
//driver.manage（）.timeouts（）.implicitlyWait（60，TimeUnit.SECONDS）；
系统输出打印项次（“开始”）；
System.out.println（“等待3000后------------------------------------------”；
Set context=driver.getContextHandles（）；
System.out.println（context.size（））；
for（字符串上下文：上下文）{System.out.println（上下文）；}
WebElement searchbar_txt=driver.findElementById（“com.android.chrome:id/search_box_text”）；
搜索栏_txt.click（）；
WebElement url\u Bar=driver.findElementById（“com.android.chrome:id/url\u Bar”）；
url_Bar.sendKeys（“amazon.in”）；
WebElement urlhistory=driver.findelementbypath（“/*[@text='amazon.in']）；
//findElementByName（“Kotak证券”）；
urlhistory.click（）；
睡眠（4000）；
Set context1=driver.getContextHandles（）；
System.out.println（context1.size（））；
for（字符串上下文：context1）{System.out.println（上下文）；}
//driver.context（（字符串）context1.toArray（）[1]）；
驱动程序上下文（“WEBVIEW_chrome”）；
睡眠（4000）；
driver.findElementById（“导航搜索关键字”）.sendKeys（“行李”）；
driver.findElementByTagName（“提交”）。单击（）；

Eclipse控制台输出：

Nov 02, 2019 12:19:03 PM io.appium.java_client.remote.AppiumCommandExecutor$1 lambda$0
INFO: Detected dialect: W3C
Hello Android
Started Mobile Testing......
start
after wait 3000----------------------------------------------
1
NATIVE_APP
2
NATIVE_APP
WEBVIEW_chrome
FAILED: chromeTest
io.appium.java_client.NoSuchContextException: An unknown server-side error occurred while processing the command. Original error: An unknown server-side error occurred while processing the command. Original error: unknown error: Failed to forward ports to device 18e6bebc: . unknown error: The adb command failed. Extra response: <>.
Build info: version: '3.141.59', revision: 'e82be7d358', time: '2018-11-14T08:25:48'
System info: host: 'TVDLT020', ip: '192.168.1.12', os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '1.8.0_201'
Driver info: io.appium.java_client.android.AndroidDriver
Capabilities {adbExecTimeout: 20000, appActivity: com.google.android.apps.chr..., appPackage: com.android.chrome, databaseEnabled: false, desired: {adbExecTimeout: 20000, appActivity: com.google.android.apps.chr..., appPackage: com.android.chrome, deviceName: Galaxy C9 Pro, noReset: true, platformName: android, platformVersion: 8.0.0, startIWDP: true}, deviceApiLevel: 26, deviceManufacturer: samsung, deviceModel: SM-C900F, deviceName: 18e6bebc, deviceScreenDensity: 420, deviceScreenSize: 1080x1920, deviceUDID: 18e6bebc, javascriptEnabled: true, locationContextEnabled: false, networkConnectionEnabled: true, noReset: true, pixelRatio: 2.625, platform: LINUX, platformName: Android, platformVersion: 8.0.0, startIWDP: true, statBarHeight: 63, takesScreenshot: true, viewportRect: {height: 1857, left: 0, top: 63, width: 1080}, warnings: {}, webStorageEnabled: false}
Session ID: 3e90e00b-2eba-40b9-9b85-fc66fde1b491
    at io.appium.java_client.AppiumDriver.context(AppiumDriver.java:229)
    at appiumAndroidApp.appiumAndroid_GoogleWeb.chromeTest(appiumAndroid_GoogleWeb.java:93)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:124)
    at org.testng.internal.Invoker.invokeMethod(Invoker.java:583)
    at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:719)
    at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:989)
    at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:125)
    at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:109)
    at org.testng.TestRunner.privateRun(TestRunner.java:648)
    at org.testng.TestRunner.run(TestRunner.java:505)
    at org.testng.SuiteRunner.runTest(SuiteRunner.java:455)
    at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:450)
    at org.testng.SuiteRunner.privateRun(SuiteRunner.java:415)
    at org.testng.SuiteRunner.run(SuiteRunner.java:364)
    at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
    at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:84)
    at org.testng.TestNG.runSuitesSequentially(TestNG.java:1208)
    at org.testng.TestNG.runSuitesLocally(TestNG.java:1137)
    at org.testng.TestNG.runSuites(TestNG.java:1049)
    at org.testng.TestNG.run(TestNG.java:1017)
    at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:115)
    at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:251)
    at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:77)
Caused by: org.openqa.selenium.WebDriverException: An unknown server-side error occurred while processing the command. Original error: An unknown server-side error occurred while processing the command. Original error: unknown error: Failed to forward ports to device 18e6bebc: . unknown error: The adb command failed. Extra response: <>.
Build info: version: '3.141.59', revision: 'e82be7d358', time: '2018-11-14T08:25:48'
System info: host: 'TVDLT020', ip: '192.168.1.12', os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '1.8.0_201'
Driver info: io.appium.java_client.android.AndroidDriver
Capabilities {adbExecTimeout: 20000, appActivity: com.google.android.apps.chr..., appPackage: com.android.chrome, databaseEnabled: false, desired: {adbExecTimeout: 20000, appActivity: com.google.android.apps.chr..., appPackage: com.android.chrome, deviceName: Galaxy C9 Pro, noReset: true, platformName: android, platformVersion: 8.0.0, startIWDP: true}, deviceApiLevel: 26, deviceManufacturer: samsung, deviceModel: SM-C900F, deviceName: 18e6bebc, deviceScreenDensity: 420, deviceScreenSize: 1080x1920, deviceUDID: 18e6bebc, javascriptEnabled: true, locationContextEnabled: false, networkConnectionEnabled: true, noReset: true, pixelRatio: 2.625, platform: LINUX, platformName: Android, platformVersion: 8.0.0, startIWDP: true, statBarHeight: 63, takesScreenshot: true, viewportRect: {height: 1857, left: 0, top: 63, width: 1080}, warnings: {}, webStorageEnabled: false}
Session ID: 3e90e00b-2eba-40b9-9b85-fc66fde1b491
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at org.openqa.selenium.remote.http.W3CHttpResponseCodec.createException(W3CHttpResponseCodec.java:187)
    at org.openqa.selenium.remote.http.W3CHttpResponseCodec.decode(W3CHttpResponseCodec.java:122)
    at org.openqa.selenium.remote.http.W3CHttpResponseCodec.decode(W3CHttpResponseCodec.java:49)
    at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:158)
    at io.appium.java_client.remote.AppiumCommandExecutor.execute(AppiumCommandExecutor.java:239)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:552)
    at io.appium.java_client.DefaultGenericMobileDriver.execute(DefaultGenericMobileDriver.java:41)
    at io.appium.java_client.AppiumDriver.execute(AppiumDriver.java:1)
    at io.appium.java_client.android.AndroidDriver.execute(AndroidDriver.java:1)
    at io.appium.java_client.AppiumDriver.context(AppiumDriver.java:226)
    ... 26 more


===============================================
    Default test
    Tests run: 1, Failures: 1, Skips: 0
===============================================


===============================================
Default suite
Total tests run: 1, Failures: 1, Skips: 0
===============================================

2019年11月2日12:19:03 PM io.appium.java_client.remote.AppiumCommandExecutor$1 lambda$0
信息：检测到的方言：W3C
你好，安卓
开始移动测试。。。。。。
开始
等待3000后----------------------------------------------
1.
本地应用程序
2.
本地应用程序
网络视图浏览器
失败：chromeTest
io.appium.java_client.NoSuchContextException:处理命令时发生未知服务器端错误。原始错误：处理命令时发生未知服务器端错误。原始错误：未知错误：无法将端口转发到设备18e6bebc:。未知错误：adb命令失败。额外响应：。
构建信息：版本：“3.141.59”，修订版：“e82be7d358”，时间：“2018-11-14T08:25:48”
系统信息：主机：'TVDLT020'，ip:'192.168.1.12'，os.name:'Windows 10'，os.arch:'amd64'，os.version:'10.0'，java.version:'1.8.0_201'
驱动程序信息：io.appium.java_client.android.AndroidDriver
功能{adbExecTimeout:20000，appActivity:com.google.android.apps.chr…，appPackage:com.android.chrome，databaseEnabled:false，所需：{adbExecTimeout:20000，appActivity:com.google.android.apps.chr…，appPackage:com.android.chrome，deviceName:Galaxy C9 Pro，noReset:true，platformName:android，platformVersion:8.0.0，startIWDP:true}，deviceApiLevel:26，deviceManufacturer:samsung，deviceModel:SM-C900F，deviceName:18e6bebc，DeviceScreedency:420，deviceScreenSize:1080x1920，DeviceAudid:18e6bebc，javascriptEnabled:true，locationContextEnabled:false，networkConnectionEnabled:true，noReset:true，像素比率：2.625，平台：LINUX，平台名称：Android，平台版本n:8.0.0，startIWDP:true，statBarHeight:63，takesScreenshot:true，viewportRect:{height:1857，left:0，top:63，width:1080}，警告：{}，WebStorage Enabled:false}
会话ID:3e90e00b-2eba-40b9-9b85-fc66fde1b491
位于io.appium.java_client.AppiumDriver.context（AppiumDriver.java:229）
在appiumandroidap.appiumAndroid_GoogleWeb.chromeTest（appiumAndroid_GoogleWeb.java:93）
在sun.reflect.NativeMethodAccessorImpl.invoke0（本机方法）处
位于sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62）
在sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）中
位于java.lang.reflect.Method.invoke（Method.java:498）
位于org.testng.internal.MethodInvocationHelper.invokeMethod（MethodInvocationHelper.java:124）
位于org.testng.internal.Invoker.invokeMethod（Invoker.java:583）
位于org.testng.internal.Invoker.invokeTestMethod（Invoker.java:719）
位于org.testng.internal.Invoker.invokeTestMethods（Invoker.java:989）
位于org.testng.internal.TestMethodWorker.invokeTestMethods（TestMethodWorker.java:125）