Unable to Unlock Xiomi Device

Support
1 
Am using xiomi note4 device to perform the below test to open google and type "Hello Appium".

import java.net.MalformedURLException;
import java.net.URL;
import java.util.concurrent.TimeUnit;

import org.openqa.selenium.By;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.remote.CapabilityType;
import org.openqa.selenium.remote.DesiredCapabilities;

import io.appium.java_client.MobileElement;
import io.appium.java_client.android.AndroidDriver;
import io.appium.java_client.remote.MobileCapabilityType;

public class Webapp {

	public static AndroidDriver<WebElement> driver;
	
	
	public static void main(String[] args) throws MalformedURLException, InterruptedException {
		// TODO Auto-generated method stub
		DesiredCapabilities  cap = new DesiredCapabilities();
		cap.setCapability(CapabilityType.BROWSER_NAME, "Chrome");
		cap.setCapability(MobileCapabilityType.DEVICE_NAME, "Xiomi");
		cap.setCapability("unlockType", "pattern");
		cap.setCapability("unlockKey","2583");
		driver = new AndroidDriver<WebElement>(new URL("http://127.0.0.1:4723/wd/hub"),cap);
		driver.get("http://google.com");
		driver.manage().timeouts().implicitlyWait(10l, TimeUnit.SECONDS);
		driver.findElement(By.name("q")).sendKeys("hello Appium");
		Thread.sleep(3000);
		driver.quit();
		

	}

}