Appium：连接到127.0.0.1:4723 [/127.0.0.1]失败：连接被拒绝：connect

Question

I am trying to write my first Java Appium test.
Each time I'm running my code the following errors are presented:

org.openqa.selenium.WebDriverException: org.apache.http.conn.HttpHostConnectException: Connect to 127.0.0.1:4723 [/127.0.0.1] failed: Connection refused: connect  
....  
at MyFirstTest.setupTest(MyFirstTest.java:52)  
Caused by: org.apache.http.conn.HttpHostConnectException: Connect to 127.0.0.1:4723 [/127.0.0.1] failed: Connection refused: connect  
at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:158)  
at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:353)  

Here is my code:

public class MyFirstTest  
{  
    public AppiumDriver<MobileElement> driver;  
    public WebDriverWait wait;  
    String usersEmail = "xxxx@gmail.com";  
    String userPassword = "aaaaaa";  

    public void login() throws InterruptedException  
    {  
        WebElement email = driver.findElement(By.xpath("//android.widget.EditText[contains(@text,'Enter Email')]"));  
        email.sendKeys(usersEmail);  
        Sleeper.SYSTEM_SLEEPER.sleep(new Duration(1000, TimeUnit.MILLISECONDS));  
        driver.findElement(By.xpath("//android.widget.RelativeLayout[contains(@resource-id,'edtPassword')]//android.widget.EditText[contains(@resource-id,'edtText')]")).sendKeys(userPassword);  
    driver.findElement(By.xpath("//android.widget.Button[contains(@resource-id,'btnLogin')]")).click();  
    }  
    @Before  
    public void setupTest() throws Exception  
    {  
        DesiredCapabilities capabilities = new DesiredCapabilities();  
        capabilities.setCapability("platormName", "Android");  
        capabilities.setCapability("deviceName", "Redmi");  
        capabilities.setCapability("appPackage","com.ls.stockpair");  
        capabilities.setCapability("appActivity","com.ls.stockpair.activity.SplashActivity");  
        driver = new AndroidDriver<MobileElement>(new URL("http://127.0.0.1:4723/wd/hub"), capabilities);  
        Thread.sleep(8000);  
    }  
    @Test  
    public void go() throws InterruptedException  
    {  

    WebElement email = driver.findElement(By.xpath("//android.widget.EditText[contains(@text,'Enter Email')]"));  
    email.sendKeys(usersEmail);  
    Sleeper.SYSTEM_SLEEPER.sleep(new Duration(1000, TimeUnit.MILLISECONDS));  
    driver.findElement(By.xpath("//android.widget.RelativeLayout[contains(@resource-id,'edtPassword')]//android.widget.EditText[contains(@resource-id,'edtText')]")).sendKeys(userPassword);  
    driver.findElement(By.xpath("//android.widget.Button[contains(@resource-id,'btnLogin')]")).click();  

    Sleeper.SYSTEM_SLEEPER.sleep(new Duration(2000, TimeUnit.MILLISECONDS));  
        }  
}  

Currently I'm starting Appium manually before running the code. Also tried to start Appium from the code - this did not help.
This code worked in the first day I started writing this code however somehow (I really do not know why) this stopped working.
I saw many questions with different answers about this issue in the web but no one helped me so far.
I'm working with a real Android device connected via USB to my Windows machine.

Answer 1

Below is the best solution, You don't need to start appium manually everytime.

public static AndroidDriver<MobileElement> driver=null;
    public static AppiumDriverLocalService service=null;

    service = AppiumDriverLocalService.buildDefaultService();
    DesiredCapabilities capabilities = new DesiredCapabilities();  
    capabilities.setCapability("platormName", "Android");  
    capabilities.setCapability("deviceName", "Redmi");  
    capabilities.setCapability("appPackage","com.ls.stockpair");  
    capabilities.setCapability("appActivity","com.ls.stockpair.activity.SplashActivity");  

    service.start();
    driver = new AndroidDriver<MobileElement>(service, capabilities);

Note : If you are using appium version 1.5.3+ then you need to set APPIUM_BINARY_PATH in environmental variable.

eg APPIUM_BINARY_PATH=C:\\Users\\YourUserName\\AppData\\Roaming\\npm\\node_modules\\appium\\build\\lib\\main.js

For more details on how to set APPIUM_BINARY_PATH please refer below screen shot: