Source: Capabilities.java 
package appium.mobileframework;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.ServerSocket;
import java.net.URL;
import java.util.Properties;
import org.openqa.selenium.remote.DesiredCapabilities;
import io.appium.java_client.AppiumDriver;
import io.appium.java_client.android.AndroidDriver;
import io.appium.java_client.android.AndroidElement;
import io.appium.java_client.remote.AndroidMobileCapabilityType;
import io.appium.java_client.remote.AutomationName;
import io.appium.java_client.remote.MobileCapabilityType;
import io.appium.java_client.service.local.AppiumDriverLocalService;
import io.appium.java_client.service.local.AppiumServiceBuilder;
public class Capabilities {
public static String apppackage,appactivity,devicename,platformname;
public AppiumDriverLocalService service;
public AppiumDriverLocalService startServer()
{
boolean flag = checkifserverisRunning(4723);
if(!flag)
{
service = AppiumDriverLocalService.buildService(new AppiumServiceBuilder().usingDriverExecutable(new File("C:\\Program Files\\nodejs\\node.exe"))
.withAppiumJS(new File("C://Users//user//AppData//Roaming//npm//node_modules//appium//build//lib//main.js"))
.withIPAddress("127.0.0.1").usingPort(4723));
service.start();
}
return service;
}
public static boolean checkifserverisRunning(int port)
{
boolean isServerRunning=false;
ServerSocket serversocket;
try{
serversocket = new ServerSocket(port);
serversocket.close();
}
catch(IOException e)
{
isServerRunning = true;
}
finally {
serversocket=null;
}
return isServerRunning;
}
public static void StartEmulator() throws IOException, InterruptedException
{
Runtime.getRuntime().exec(System.getProperty("user.dir")+"\\src\\main\\resources\\emulator.bat");
Thread.sleep(15000);
}
public static AndroidDriver<AndroidElement> capability() throws IOException, InterruptedException {
// TODO Auto-generated method stub
FileReader fis = new FileReader(System.getProperty("user.dir")+"\\src\\main\\java\\Global.properties");
Properties pro = new Properties();
pro.load(fis);
apppackage = pro.getProperty("apppackage");
appactivity = pro.getProperty("appactivity");
devicename = pro.getProperty("devicename");
platformname = pro.getProperty("platformname");
if(devicename.contains("amol"))
{
StartEmulator();
Thread.sleep(15000);
}
DesiredCapabilities cap = new DesiredCapabilities();
cap.setCapability(MobileCapabilityType.DEVICE_NAME,devicename);
cap.setCapability(MobileCapabilityType.PLATFORM_NAME,platformname);
cap.setCapability(MobileCapabilityType.NO_RESET, true);
cap.setCapability(MobileCapabilityType.AUTOMATION_NAME, AutomationName.ANDROID_UIAUTOMATOR2);
cap.setCapability(AndroidMobileCapabilityType.APP_PACKAGE,apppackage);
cap.setCapability(AndroidMobileCapabilityType.APP_ACTIVITY,appactivity);
cap.setCapability(AndroidMobileCapabilityType.CHROMEDRIVER_EXECUTABLE,"C:\\Users\\user\\Downloads\\chromedriver_win32\\chromedriver.exe");
AndroidDriver<AndroidElement> driver = new AndroidDriver<AndroidElement>(new URL("http://127.0.0.1:4723/wd/hub"),cap);
//I don't want to write this capability again and again for all the classes so I want to keep this common and import this in all the classes
return driver;
}
}
