Hi,
I am working on hybrid app for appium automation using emulator. This app is developed using Ionic framework. I am unable to use sendKeys method for web element inside webview. I am able to click that element, but sendKeys is not working and throwing error as “An unknown server-side error occurred while processing the command. Original error: unknown error: cannot focus element”

Appium 1.9.0 ; Chrome 61; Chrome driver 2.33 / 2.34 ; Java client 6.1.0

Below is my code:

package packageSeptNine;

import java.net.MalformedURLException;
import java.net.URL;
import java.util.Set;
import java.util.concurrent.TimeUnit;

import org.openqa.selenium.By;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.testng.annotations.Test;

import io.appium.java_client.AppiumDriver;
import io.appium.java_client.FindsByAndroidUIAutomator;
import io.appium.java_client.MobileElement;
import io.appium.java_client.TouchAction;
import io.appium.java_client.android.AndroidDriver;

public class EmulSmartView
{
@Test
public void test_qual3() throws InterruptedException {
AppiumDriver driver = null;

	DesiredCapabilities caps = new DesiredCapabilities();
	
	caps.setCapability("deviceName", "Phone");
	caps.setCapability("udid", "emulator-5554");
	//caps.setCapability("platformName", "Android");
	//caps.setCapability("platformVersion", "8.1.0");
	caps.setCapability("appPackage", "io.ionic.starter");
	caps.setCapability("appActivity", "io.ionic.starter.MainActivity");
	//caps.setCapability("autoWebview", "true");
	caps.setCapability("browserName", "");
	caps.setCapability("automationName", "appium");
	//caps.setCapability("noReset", "true");
	
	caps.setCapability("chromedriverExecutable", "D:\\Browser Drivers\\Chrome2_34\\chromedriver.exe");
	
	try {
			driver = new AndroidDriver<MobileElement>(new URL("http://127.0.0.1:4723/wd/hub"), caps);
		
	} catch (MalformedURLException e) {
		System.out.println(e.getMessage());
	}

	driver.manage().timeouts().implicitlyWait(20, TimeUnit.SECONDS); 
	
	Thread.sleep(10000);
	
	System.out.println("Context count is "+driver.getContextHandles().size());
	
	System.out.println("name of context is "+ driver.getContextHandles());
	
	Set<String> conName=driver.getContextHandles();
	
	Thread.sleep(3000);
	
	for (String cont:conName)
	{
		System.out.println(cont);
		if(cont.contains("WEBVIEW_io.ionic.starter"))
		{
			driver.context(cont);
			System.out.println("I am in webview");
			break;
		}
	}
	
	Thread.sleep(5000);
	driver.findElement(By.id("userName")).sendKeys("abcd");
	
	//driver.findElement(By.id("password")).click();
	Thread.sleep(5000);
	//driver.quit();
	}

}

Error message:

[RemoteTestNG] detected TestNG version 6.7.0
[TestNG] Running:
C:\Users\yu251666\AppData\Local\Temp\testng-eclipse–1160080088\testng-customsuite.xml

Sep 20, 2018 3:54:00 AM io.appium.java_client.remote.AppiumCommandExecutor$1 lambda$0
INFO: Detected dialect: W3C
Context count is 3
name of context is [NATIVE_APP, WEBVIEW_chrome, WEBVIEW_io.ionic.starter]
NATIVE_APP
WEBVIEW_chrome
WEBVIEW_io.ionic.starter
I am in webview
FAILED: test_qual3
org.openqa.selenium.WebDriverException: An unknown server-side error occurred while processing the command. Original error: unknown error: cannot focus element
(Session info: chrome=61.0.3163.98)
(Driver info: chromedriver=2.34.522940 (1a76f96f66e3ca7b8e57d503b4dd3bccfba87af1),platform=Windows NT 10.0.16299 x86_64)
Build info: version: ‘3.14.0’, revision: ‘aacccce0’, time: '2018-08-02T20:05:20.749Z’
System info: host: ‘L-285000932’, ip: ‘192.168.0.13’, os.name: ‘Windows 10’, os.arch: ‘amd64’, os.version: ‘10.0’, java.version: '1.8.0_144’
Driver info: io.appium.java_client.android.AndroidDriver
Capabilities {appActivity: io.ionic.starter.MainActivity, appPackage: io.ionic.starter, automationName: appium, browserName: , chromedriverExecutable: D:\Browser Drivers\Chrome2_…, databaseEnabled: false, desired: {appActivity: io.ionic.starter.MainActivity, appPackage: io.ionic.starter, automationName: appium, browserName: , chromedriverExecutable: D:\Browser Drivers\Chrome2_…, deviceName: Phone, platformName: android, udid: emulator-5554}, deviceManufacturer: Google, deviceModel: Android SDK built for x86, deviceName: emulator-5554, deviceScreenSize: 1080x1920, deviceUDID: emulator-5554, javascriptEnabled: true, locationContextEnabled: false, networkConnectionEnabled: true, platform: LINUX, platformName: Android, platformVersion: 8.1.0, takesScreenshot: true, udid: emulator-5554, warnings: {}, webStorageEnabled: false}
Session ID: 0932d392-23e8-4455-b8fb-6cbf5ae620d4
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
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:231)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:548)
at io.appium.java_client.DefaultGenericMobileDriver.execute(DefaultGenericMobileDriver.java:42)
at io.appium.java_client.AppiumDriver.execute(AppiumDriver.java:1)
at io.appium.java_client.android.AndroidDriver.execute(AndroidDriver.java:1)
at org.openqa.selenium.remote.RemoteWebElement.execute(RemoteWebElement.java:276)
at io.appium.java_client.DefaultGenericMobileElement.execute(DefaultGenericMobileElement.java:45)
at io.appium.java_client.MobileElement.execute(MobileElement.java:1)
at io.appium.java_client.android.AndroidElement.execute(AndroidElement.java:1)
at org.openqa.selenium.remote.RemoteWebElement.sendKeys(RemoteWebElement.java:100)
at packageSeptNine.EmulSmartView.test_qual3(EmulSmartView.java:74)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:80)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:715)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:907)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1237)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)
at org.testng.TestRunner.privateRun(TestRunner.java:767)
at org.testng.TestRunner.run(TestRunner.java:617)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:334)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:329)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:291)
at org.testng.SuiteRunner.run(SuiteRunner.java:240)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:51)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:85)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1197)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1122)
at org.testng.TestNG.run(TestNG.java:1030)
at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:114)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:251)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:77)

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

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

[TestNG] Time taken by org.testng.reporters.JUnitReportReporter@2752f6e2: 22 ms
[TestNG] Time taken by org.testng.reporters.XMLReporter@1134affc: 17 ms
[TestNG] Time taken by org.testng.reporters.jq.Main@7e0babb1: 65 ms
[TestNG] Time taken by [TestListenerAdapter] Passed:0 Failed:0 Skipped:0]: 12 ms
[TestNG] Time taken by org.testng.reporters.EmailableReporter@2f7c7260: 6 ms
[TestNG] Time taken by org.testng.reporters.SuiteHTMLReporter@45c8e616: 52 ms