Wait for an element to load in appium

Support
1

How to wait for a page load? I have a scenario where after I am trying to do a button click which will navigate to a new screen. On this screen, I need to check for elements.

I have inserted a thread.sleep(2000) or explicit wait for the element to be loaded. The elements that I am trying to search in the new screen are visible in appium scripts sometimes, and failing most of the times.

Is there any other approach to search for elements?

//1
MobileElement el1 = (MobileElement) driver.findElement(MobileBy.id("tvEmail"));
	//MobileElement el1 = (MobileElement) 
//2
driver.findElement(MobileBy.AndroidUIAutomator("new UiSelector().resourceIdMatches(\".*tvEmail\")"));
//3
MobileElement el1 = (MobileElement ) driver.findElement(By.id("com.app.id:/tvEmail"));
2

-> https://github.com/appium/java-client/blob/master/docs/Page-objects.md -> look at:

PageFactory.initElements(new AppiumFieldDecorator(searchContext, 
              /*searchContext is a WebDriver or WebElement
              instance */
	    15, //default implicit waiting timeout for all strategies
		TimeUnit.SECONDS), 
			pageObject //an instance of PageObject.class
);

this line set time limit to find any element on page