added launch emulator and appium server

src/main/java/com/core/ADB.java

@@ -3,18 +3,48 @@
 import org.apache.log4j.LogManager;
 import org.apache.log4j.Logger;
 
+import java.io.File;
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.concurrent.TimeUnit;
 
 public class ADB {
     private Logger logger = LogManager.getLogger(ADB.class);
 
+    private static String sdkPath = System.getenv("ANDROID_HOME");
+    private static String adbPath = sdkPath + "platform-tools" + File.separator + "adb";
+    private static String emulatorPath = sdkPath +File.separator + "emulator";
+
     private String ID;
 
     public ADB(String deviceID) {
         ID = deviceID;
     }
 
+    public static void launchEmulator(String nameOfAVD) {
+        System.out.println("Starting emulator for '" + nameOfAVD + "' ...");
+        String[] aCommand = new String[] { emulatorPath, "-avd", nameOfAVD };
+        try {
+            Process process = new ProcessBuilder(aCommand).start();
+            process.waitFor(180, TimeUnit.SECONDS);
+            System.out.println("Emulator launched successfully!");
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    public static void closeEmulator() {
+        System.out.println("Killing emulator...");
+        String[] aCommand = new String[] { adbPath, "emu", "kill" };
+        try {
+            Process process = new ProcessBuilder(aCommand).start();
+            process.waitFor(1, TimeUnit.SECONDS);
+            System.out.println("Emulator closed successfully!");
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
     public String command(String command) {
         logger.debug("Formatting ADB Command: " + command);
         if (command.startsWith("adb"))