Xamarin Forms Entry with coloured border on Android

user_9429117 0
Viewed 4178

I have made a custom rendered entry for my app that at the minute just adds padding to the text. I would also like the border color to always be blue, even when the user focuses on the entry. I have this code at the minute in my Android custom entry (taken from here, but it doesn't work, it simply adds just a blue background):

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

        if (Control != null)
        {
            var view = (BlueBorderEntry)Element;
            GradientDrawable gd = new GradientDrawable();

            //Below line is useful to give border color
            gd.SetColor(global::Android.Graphics.Color.Rgb(45, 192, 232));


            this.Control.SetBackgroundDrawable(gd);
            this.Control.SetPadding(40, 40, 40, 40);


            this.Control.SetRawInputType(InputTypes.TextFlagNoSuggestions);
        }
    }

I have explored what could possibly set the border color and found:

this.Control.SetCompoundDrawables();

Which is described as:

Sets the drawables to appear to the left, above, right and below the text.

However after passing in a Drawable with the blue color, it did absolutely nothing to my entry.

I can't seem to figure out how to get the border to be a blue color, if someone could please help me?

EDIT: I need the border to be on the bottom of the entry and about 5px thick.

xamarin.forms xamarin.android android
3 Answers

You can, without a renderer, use a Frame and put the Entry inside the frame, and set the border color for the frame.This is the easy way.

Or you can modify your renderer:

public class CustomEntryRenderer : EntryRenderer { protected override void OnElementChanged(ElementChangedEventArgs<Entry> e) { base.OnElementChanged(e); if (e.OldElement == null) { var nativeEditText = (global::Android.Widget.EditText)Control; var shape = new ShapeDrawable(new Android.Graphics.Drawables.Shapes.RectShape()); shape.Paint.Color = Xamarin.Forms.Color.Red.ToAndroid(); shape.Paint.SetStyle(Paint.Style.Stroke); nativeEditText.Background = shape; } } }

user_16919800

Usually, I don't like workarounds but this just too hard to ignore :

<FooLayout BackgroundColor="White">
  <StackLayout BackgroundColor="Black" Padding="1">
      <Entry BackgroundColor="White" />
  </StackLayout>
    ...
 </FooLayout>

Where FooLayout is analogy for any layout

user_74620310

I have used a work around, I added a BoxView below the entry with the same width as the Entry and a HeightRequest of 5

<customrenderers:BlueBorderEntry x:Name="username" Text="" Placeholder="Email" WidthRequest="150" Margin="35, 0, 35, 0"/>
<BoxView WidthRequest="150" HeightRequest="5" BackgroundColor="#8ad6ea" Margin="35, 0, 35, 20"/>
user_94291170
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