How can I have different listviews on one page depending on what you clicked on the previous page?

Question

The page where the user clicks either 1 or 2 and you get pushed to the same page, but I want it to be a unique list for each category clicked. So, when you click on Clickt

Answer 1

If you choose to use public properties instead of overloading your constructor:

In your calling page (StartPage?), pass in the Category Name:

void Clickthis1 (object sender, EventArgs args)
{
    startPage= new StartPage(); 
    startPage.CategoryName = categoryName;
    Navigation.PushAsync (startPage));
}

Then in your second page (which I'll call ListPage)

class ListPage : ContentPage
{
    public ListPage()
    {
        getItems ();
    }

    private string categoryName; 
    public string TheCategoryName 
    { 
        get { return categoryName; }
        set { categoryName= value; }
    }

Then use the category in your list-building method:

async void getItems () 
{
    var items = await parseAPI.myInfo (Application.Current.Properties[categoryName].ToString ());

    ...
}