scrolling and selecting all items in a list in appium

Question

I have a list of items with checkboxes 1,2...n

I used this code to get the list of the current view and select the items. How could I scroll the list to select the next items in the list and repeat this process until the end ?

List<WebElement> elements = driver.findElements(By.xpath("//android.widget.CheckBox"));
        for(WebElement element: elements){
            element.click();
        }

Answer 1

Note that I use the Selenium import, not the TouchAction of Appium:

import org.openqa.selenium.interactions.touch.TouchActions;

The scrolldown method using TouchActions:

public void scrollDown() throws Exception {

    //The viewing size of the device
    Dimension size = driver.manage().window().getSize();

    //Starting y location set to 80% of the height (near bottom)
    int starty = (int) (size.height * 0.80);
    //Ending y location set to 20% of the height (near top)
    int endy = (int) (size.height * 0.20);
    //x position set to mid-screen horizontally
    int startx = size.width / 2;

    new TouchActions(driver)
            .down(startx, starty)
            .move(startx, endy)
            .release()
            .build()
            .perform();

}

Please let me know if this works for you. If it does not, I will post a separate answer with the Javascript Executor.

Answer 2

Here is the version that uses the javascript executor:

public void jsScrollDown() throws Exception {

    JavascriptExecutor js = (JavascriptExecutor) driver;
    HashMap<String, String> scrollObject = new HashMap<String, String>();
    scrollObject.put("direction", "down");
    js.executeScript("mobile: scroll", scrollObject);

}