How to set Placeholder and PlaceHolder Color in Editor Xamarin Forms

Question

How to set Placeholder Text and Placeholder Color in Editor in Xamarin Forms.

It has no default Functiona

Answer 1

You will need a custom renderer for that (Here is the Android Custom Renderer) you will need another renderer for iOS:

public class PlaceholderEditor : Editor
{
    public static readonly BindableProperty PlaceholderProperty =
        BindableProperty.Create(view => view.Placeholder, String.Empty);

    public PlaceholderEditor()
    {
    }

    public string Placeholder
    {
        get
        {
            return (string)GetValue(PlaceholderProperty);
        }

        set
        {
            SetValue(PlaceholderProperty, value);
        }
    }
}

public class PlaceholderEditorRenderer : EditorRenderer
{
    public PlaceholderEditorRenderer()
    {
    }

    protected override void OnElementChanged(
        ElementChangedEventArgs e)
    {
        base.OnElementChanged(e);

        if (e.NewElement != null)
        {
            var element = e.NewElement as PlaceholderEditor;
            this.Control.Hint = element.Placeholder;
        }
    }

    protected override void OnElementPropertyChanged(
        object sender,
        PropertyChangedEventArgs e)
    {
        base.OnElementPropertyChanged(sender, e);

        if (e.PropertyName == PlaceholderEditor.PlaceholderProperty.PropertyName)
        {
            var element = this.Element as PlaceholderEditor;
            this.Control.Hint = element.Placeholder;
        }
    }
}

And for the color you may need something like this (Android):

Control.SetHintTextColor(Android.Graphics.Color.White);

There already a thread for this in the Xamarin Forums: https://forums.xamarin.com/discussion/20616/placeholder-editor

And more about Custom Renderers information below: https://developer.xamarin.com/guides/xamarin-forms/custom-renderer/