android-appium: A new session could not be created

detail log:
org.openqa.selenium.SessionNotCreatedException: A new session could not be created. (Original error: Command failed: C:\Windows\system32\cmd.exe /s /c “C:\Users\sxie\AppData\Local\Android\sdk\platform-tools\adb.exe -s emulator-5554 shell “ps ‘uiautomator’””
) (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 0 milliseconds
Build info: version: ‘3.4.0’, revision: ‘unknown’, time: 'unknown’
System info: host: ‘WL00070299’, ip: ‘10.110.12.39’, os.name: ‘Windows 8.1’, os.arch: ‘x86’, os.version: ‘6.3’, java.version: '1.8.0_40’
Driver info: driver.version: AndroidDriver
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.ErrorHandler.createThrowable(ErrorHandler.java:215)
at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:167)
at io.appium.java_client.remote.AppiumProtocolHandShake.createSession(AppiumProtocolHandShake.java:161)
at io.appium.java_client.remote.AppiumProtocolHandShake.createSession(AppiumProtocolHandShake.java:76)
at io.appium.java_client.remote.AppiumCommandExecutor.doExecute(AppiumCommandExecutor.java:111)
at io.appium.java_client.remote.AppiumCommandExecutor.execute(AppiumCommandExecutor.java:162)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:637)
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.RemoteWebDriver.startSession(RemoteWebDriver.java:250)
at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:236)
at org.openqa.selenium.remote.RemoteWebDriver.(RemoteWebDriver.java:137)
at io.appium.java_client.DefaultGenericMobileDriver.(DefaultGenericMobileDriver.java:38)
at io.appium.java_client.AppiumDriver.(AppiumDriver.java:88)
at io.appium.java_client.AppiumDriver.(AppiumDriver.java:112)
at io.appium.java_client.android.AndroidDriver.(AndroidDriver.java:73)
at com.sky.demo.ContactTest.setUp(ContactTest.java:44)
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.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

==========================================
直接在cmd中执行"C:\Windows\system32\cmd.exe /s /c "C:\Users\sxie\AppData\Local\Android\sdk\platform-tools\adb.exe -s emulator-5554 shell "ps 'uiautomator'""
bad pid 'uiautomator'", 报错: bad pid 'uiautomator'

code:
public class ContactTest {
private AndroidDriver driver;
@Before
public void setUp() throws Exception {
//设置apk的路径
File classpathRoot = new File(System.getProperty("user.dir"));
File appDir = new File(classpathRoot, "apps");
File app = new File(appDir, "ContactManager.apk");

    //设置自动化相关参数
    DesiredCapabilities capabilities = new DesiredCapabilities();
    capabilities.setCapability(CapabilityType.BROWSER_NAME, "");
    capabilities.setCapability("automationName","Appium");  
    capabilities.setCapability("platformName", "Android");
    capabilities.setCapability("deviceName", "Pixel_XL_API_25");// Galaxy_Nexus_API_25

    capabilities.setCapability("noReset", true);
    capabilities.setCapability("avdReadyTimeout", 300000);
    capabilities.setCapability("sessionOverride", true);    

    //设置安卓系统版本
    capabilities.setCapability("platformVersion", "7.1.1");
    //设置apk路径
    capabilities.setCapability("app", app.getAbsolutePath()); 

    //设置app的主包名和主类名
    capabilities.setCapability("appPackage", "com.example.android.contactmanager");
    capabilities.setCapability("appActivity", ".ContactManager");

    //初始化
    driver = new AndroidDriver(new URL("http://127.0.0.1:4723/wd/hub"), capabilities);
    driver.manage().timeouts().implicitlyWait(10,TimeUnit.SECONDS);  
}

@Test
public void addContact(){
    WebElement el = driver.findElement(By.name("Add Contact"));
    el.click();
    List<WebElement> textFieldsList = driver.findElementsByClassName("android.widget.EditText");
    textFieldsList.get(0).sendKeys("feimaoyuzhubaobao");
    textFieldsList.get(2).sendKeys("forever together");
    driver.swipe(100, 500, 100, 100, 2);
    driver.findElementByName("Save").click();
}    

@After
public void tearDown() throws Exception {
    driver.quit();
}

}

1个回答

resolved by this way:
adb.js(C:\Program Files (x86)\Appium\node_modules\appium\node_modules\appium-adb\lib\adb.js) 中1035 行this.shell(“ps '” + name + “’”, function (err, stdout) {
对应执行的指令是ps ‘uiautomator’, Android7不支持这个指令格式,所以执行结果是bad pid ‘uiautomator’
目前Appium未对此进行处理,所以需要修改此指令的执行方式
即将
this.shell(“ps '” + name + "’", function (err, stdout) {
if (err) return cb(err);
替换成
this.shell_grep(“ps”, name, function (err, stdout) {

if (err) {

logger.debug(“No matching processes found”);
return cb(null, []);

}

并增加上面用到的shell_grep函数:
ADB.prototype.shell_grep = function (cmd, grep, cb) {
if (cmd.indexOf(’"’) === -1) {
cmd = ‘"’ + cmd + ‘"’;
}
var execCmd = 'shell ’ + cmd + '| grep ’ + grep;
this.exec(execCmd, cb);

};

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