Here's how to fix it.

private float findNewTextSize(int width, int height, CharSequence text) {
        TextPaint textPaint = new TextPaint(getPaint());
        float targetTextSize = getMaxTextSize();  // Start from the max size
        int textHeight = getTextHeight(text, textPaint, width, targetTextSize);
        while(textHeight > height && targetTextSize > mMinTextSize) {
            targetTextSize = Math.max(targetTextSize - 1, mMinTextSize);
            textHeight = getTextHeight(text, textPaint, width, targetTextSize);
        }
        return targetTextSize;
    }

All I wanted is that it would fit into it boundaries.

Using the next XML will make it very slow and also truncate the text:

<com.omitneedlesscode.sizeadjustingtextview.SizeAdjustingTextView
    android:layout_width="180dp"
    android:layout_height="203dp"
    android:layout_below="@+id/text_input"
    android:maxLines="2"
    android:text="content text sample"
    android:textSize="1000dp"/>

And this is what I got :

plus it was very slow.

note that I've set 1000dp so that it will resize to the max that it can. a better way is to do it in code.

I think it should work this way: using the current configurations of the TextView, if it failed to fit, try to find a font that will make it fit. if failed with this, try to add a line (till reaching max lines that were set), and for each iteration there try to fit the font.

For the font checking, I think it should use binary search, instead of decreasing by 1 .