How to make RelativeSizeSpan align to top

Question

I have the following String RM123.456. I would like to

• Make RM relatively smaller
• Make RM aligned to to

Answer 1

the best suitable solution is go with html.

i will prefer for this solutions,it supports in all android version as well devices.

here is example take it same as you want text

<p><sup>TM</sup> 123.456.</p>

i am getting result in android

^TM 123.456.

you can easily display text in Textview in android with

Html.fromText("YOUR_STRING_INHTML");

Hope it helps.

Answer 2

I know this is an old thread, but I just came across this today, and I'm surprised no one answered with this... I'd recommend not hardcoding the 2, 4 but you can figure out how to

val span = SpannableStringBuilder.valueOf("$temp")
span.append("°F", SuperscriptSpan(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
span.setSpan(RelativeSizeSpan(0.5f), 2, 4, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
tempTextView.setText(span, TextView.BufferType.SPANNABLE)

Answer 3

Class for top align which should be used instead of RelativeSizeSpan (not in additional to):

import android.text.TextPaint;
import android.text.style.MetricAffectingSpan;

public class TopRelativeSizeSpan extends MetricAffectingSpan {

    private final float mProportion;

    public TopRelativeSizeSpan(float proportion) {
        mProportion = proportion;
    }

    @Override
    public void updateDrawState(TextPaint ds) {
        ds.baselineShift += (mProportion - 1) * (ds.getTextSize() - ds.descent());
        ds.setTextSize(ds.getTextSize() * mProportion);
    }

    @Override
    public void updateMeasureState(TextPaint ds) {
        updateDrawState(ds);
    }
}

And usage:

spannableString.setSpan(new TopRelativeSizeSpan(0.50f), 0, index, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
textView.setText(spannableString, TextView.BufferType.SPANNABLE);