Locator Strategy 'css selector' is not sup

问题:

Since I'm new to mobile automation, I've been trying to run simple activities using appium maven and eclipse. But When I try to run Calculator app opens but the elements are not accessible.

This the code I used to run a simple calculator

  @BeforeClass
 public void setUp() throws MalformedURLException {

    DesiredCapabilities capabilities = new DesiredCapabilities();
    capabilities.setCapability("BROWSER_NAME", "Android");
    capabilities.setCapability("VERSION", "4.4.2");
    capabilities.setCapability("deviceName", "Emulator");
    capabilities.setCapability("platformName", "Android");

    capabilities.setCapability("appPackage", "com.android.calculator2");

    capabilities.setCapability("appActivity", "com.android.calculator2.Calculator");

    driver = new RemoteWebDriver(new URL("http://0.0.0.0:4723/wd/hub"), capabilities);
}

@Test
public void testCal() throws Exception {

    WebElement two = driver.findElement(By.name("2"));
    two.click();

}

@AfterClass
public void teardown() {

}

I am using the latest stable dependencies. io.appium java-client 7.0.0 and org.testng testng 6.14.3

FAILED: testCal
org.openqa.selenium.InvalidSelectorException: Locator Strategy 'css 
selector' is not supported for this session
For documentation on this error, please visit: 
https://www.seleniumhq.org/exceptions/invalid_selector_exception.html
Driver info: org.openqa.selenium.remote.RemoteWebDriver
Capabilities {BROWSER_NAME: Android, VERSION: 4.4.2, appActivity: 
com.android.calculator2.Cal..., appPackage: com.android.calculator2, 
databaseEnabled: false, desired: {BROWSER_NAME: Android, VERSION: 4.4.2, 
appActivity: com.android.calculator2.Cal..., appPackage: 
com.android.calculator2, deviceName: Emulator, platformName: android}, 
deviceManufacturer: HUAWEI, deviceModel: FLA-LX2, deviceName: 
HXT7N18521000819, deviceScreenSize: 1080x2160, deviceUDID: 
HXT7N18521000819, javascriptEnabled: true, locationContextEnabled: false, 
networkConnectionEnabled: true, platform: LINUX, platformName: LINUX, 
platformVersion: 8.0.0, takesScreenshot: true, warnings: {}, 
webStorageEnabled: false}
Session ID: a604a166-3c0d-4e9c-a3e4-9b1ea734bee6
*** Element info: {Using=name, value=2}
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...

回答1:

Appium is not Selenium: they both implemented using JSON wire protocol and has similar APIs, but not the same ones:

Supported locator strategies for Native android app:

• id (resource-id View attribute);
• accessbilityId (content-desc View attribute);
• uiAutomator (better to read about UiSelector);
• className (ui component type);
• XPath.

So you cannot use By.name locator strategy for Android driver session, it's not supported.

To make it easy, I suggest using MobileBy in place of By in Appium native tests: you will get the proper options.

回答2:

By.name("text") is removed from Appium v1.5.0 onwards.

Also just to add cssSelector strategy + methods like getAttribute("color/background") present in Selenium are not supported in Appium for native apps as these are not supported by underlying unit testing framework of Android i.e. UIAutomator.

You can use below options for clicking digits of calculator

driver.findElement(By.id(“com.android.calculator2:id/digit5”)).click();
driver.findElement(By.xpath(“//android.widget.Button[contains(@resource-id,'digit5') and @text='5']”)).click();
driver.findElementByAccessibilityId(“plus”).click();
driver.findElement(By.xpath(“//android.widget.Button[@text='5']”)).click();

回答3:

I tried this approach on feb 3rd 2020 and was able to execute succesfully. The change I had to make are update io.appium to 7.2.0.

Pre Requisites in my Case/test: Windows Machine, created Nexus S AVD, Launched Appium and AVD.

Most Importantly

URL url = new URL("http://127.0.0.1:4723/wd/hub");
driver = new AndroidDriver<MobileElement>(url, capabilities);
MobileElement two =(MobileElement)driver.findElement(By.id("com.android.calculator2:id/digit_9"));   
two.click();

回答4:

Recently I got this issue too. If anyone wants to know, here are the things i did to solve this issue.

1. Updated the java-client. I updated it to version 7.2.0 in the pom.
2. Removed the selenium-java dependency. This is needed to be removed, as java-client already has the selenium dependency.If not removed it might cause conflict.
3. Update my maven project.
4. Rerun the test. I just tried to click the number 5 in the calculator app using an emulator, and it worked