Javanullpointer exception in my code

here is the code which im writing using POM… I have created Page and test cases, but when im running the code , its throwing the nullpointer exception error… My appliction get launch on my device but @Test get failed…
PAGE :-
// This class will store all the locators and methods for login page

package com.pb.pages;

import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;

public class Loginpage {

WebDriver driver;

By mobilenumber = By.id("......");
By submit = By.id("......."); 

public void LoginPage(WebDriver driver)     // Create Parametrized Constructor  to intialize the Webdriver
{
										 
	this.driver = driver;

}

// Create Method to login by calling above locators .

public void LoginToPb(String number) {

	driver.findElement(mobilenumber).sendKeys(number);
}

public void clicktologin(){
driver.findElement(submit).click();

}

}


TESTCASE
public class VerifyPbLogin {

AndroidDriver<MobileElement> driver;


@BeforeClass
public void launch() throws MalformedURLException {

	DesiredCapabilities capabilities = new DesiredCapabilities();

	capabilities.setCapability("platformName", "Android");
	capabilities.setCapability("deviceName", "EBAZFG240031");
	capabilities.setCapability("version", "4.4.2");
	capabilities.setCapability("appPackage", "........");
	capabilities.setCapability("app_activity",
			"...................");
	driver = new AndroidDriver<MobileElement>(new URL("http://127.0.0.1:4723/wd/hub"),capabilities);
	
  driver.manage().timeouts().implicitlyWait(10000, TimeUnit.SECONDS);
System.out.println("timecheck");
}

@Test
public void verifylogin() {

	Loginpage login = new Loginpage();

	login.LoginToPb("xxxxxxxxxx");

	login.clicktologin();
	driver.quit();

}

}

try first update:

Loginpage login = new Loginpage();

// change to -> 

Loginpage login = new Loginpage(driver);

Its throwing error

and udate

public void LoginPage(AndroidDriver<MobileElement>)
{
  this.driver = driver;
}

Thanks Its working now. their was a problem in constructor name.