How to enable device emulation mode (device mode) in chrome by default

Question

How to run chrome with device mode emulation (emulating mouse events as touch screen events) without manually enabling it in dev tools?

Preferably with a flag change or a run time parameter change.

Answer 1

public static void main(String[] args) {
    System.setProperty("webdriver.chrome.driver", "/Users/guolei/tmp/chromedriver");
    Map<String, String> mobileEmulation = new HashMap<>();

    mobileEmulation.put("deviceName", "iPhone 6");

    ChromeOptions chromeOptions = new ChromeOptions();
    chromeOptions.setExperimentalOption("mobileEmulation", mobileEmulation);
    chromeOptions.addArguments("start-maximized");

    WebDriver driver = new ChromeDriver(chromeOptions);

    driver.get("http://m.taoche.com/");
}