[mono-android] Underline text in TextView

[DiCo]

Hi,
I need to set underline text in my TextView dynamically in activity.cs
and i don't know how to do that...

I didn't find the exmaple for mono for android C#,
example on Java (like using SpannableString doesn't work)

Can anybody help ?

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[Jonathan Pryor]

I didn't find the exmaple for mono for android C#, example on Java (like using SpannableString doesn't work)

What was your example Java code and equivalent C# code? I would expect that to work.

We have a sample that uses string formatting via resources, so not directly equivalent, but it does demonstrate display of formatted strings:

https://github.com/xamarin/monodroid-samples/tree/master/SkeletonApp
https://github.com/xamarin/monodroid-samples/blob/master/SkeletonApp/Resources/values/strings.xml#L27
https://github.com/xamarin/monodroid-samples/blob/master/SkeletonApp/SkeletonApp.cs#L31

Thanks,
- Jon

[DiCo]

Jon, thanks.

You gave me idea - and i found the way ))

Example that doesn't work in my case:

TextView textView = (TextView) view.findViewById(R.id.textview);

SpannableString content = new SpannableString("Content");
content.setSpan(new UnderlineSpan(), 0, content.length(), 0);
textView.setText(content);

and

TextView textView = (TextView) view.findViewById(R.id.textview);
textView.setText(Html.fromHtml(getString(R.string.your_string_here)));

In my case TextView.SetText Method doesn't have any ovveride version with
ISpanned as parameter.

myTextView.TextFormatted = Html.FromHtml(MyString);

where MyString is like '<u>Underline Text</u>'




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[Jonathan Pryor]

Post by DiCo
TextView textView = (TextView) view.findViewById(R.id.textview);

SpannableString content = new SpannableString("Content");
content.setSpan(new UnderlineSpan(), 0, content.length(), 0);
textView.setText(content);

and

TextView textView = (TextView) view.findViewById(R.id.textview);
textView.setText(Html.fromHtml(getString(R.string.your_string_here)));

In my case TextView.SetText Method doesn't have any ovveride version with ISpanned as parameter.

A variation on your approach: the TextView.TextFormatted [0] property takes an ICharSequence, which ISpanned implements [1], so this should be valid:

using (SpannableString content = new SpannableString ("Content"))
using (UnderlineSpan underline = new UnderlineSpan ()) {
content.SetSpan(underline, 0, content.Length(), 0);
myTextView.TextFormatted = content;
}

- Jon

[0] http://androidapi.xamarin.com/?link=P%3aAndroid.Widget.TextView.TextFormatted
[1] http://androidapi.xamarin.com/?link=T:Android.Text.ISpanned