将两种不同的字体样式应用于TextView

Question

我想将两种不同的字体样式应用于单个TextView中的文本.

我的情况与Android相同- 两个句子,两个样式,一个TextView.唯一的区别是我想在整个文本上设置自定义字体.我已将Helvetica Font作为资产包含在我的项目中,并希望将该字体应用于TextView,文本的第一部分将是Helvetica BOLD,其余部分为Helvetica NORMAL.有什么建议怎么办？

需要以下格式的文字.具有不同样式和单个textview的自定义文本.

Answer 1

一种方法是扩展TypefaceSpan:

import android.graphics.Paint;
import android.graphics.Typeface;
import android.text.TextPaint;
import android.text.style.TypefaceSpan;

    public class CustomTypefaceSpan extends TypefaceSpan {
        private final Typeface newType;

        public CustomTypefaceSpan(String family, Typeface type) {
            super(family);
            newType = type;
        }

        @Override
        public void updateDrawState(TextPaint ds) {
            applyCustomTypeFace(ds, newType);
        }

        @Override
        public void updateMeasureState(TextPaint paint) {
            applyCustomTypeFace(paint, newType);
        }

        private static void applyCustomTypeFace(Paint paint, Typeface tf) {
            int oldStyle;
            Typeface old = paint.getTypeface();
            if (old == null) {
                oldStyle = 0;
            } else {
                oldStyle = old.getStyle();
            }

            int fake = oldStyle & ~tf.getStyle();
            if ((fake & Typeface.BOLD) != 0) {
                paint.setFakeBoldText(true);
            }

            if ((fake & Typeface.ITALIC) != 0) {
                paint.setTextSkewX(-0.25f);
            }

            paint.setTypeface(tf);
        }
    }

然后当你想使用两种不同的字体时调用:

String firstWord = "first ";
String secondWord = "second";

// Create a new spannable with the two strings
Spannable spannable = new SpannableString(firstWord+secondWord);

// Set the custom typeface to span over a section of the spannable object
spannable.setSpan( new CustomTypefaceSpan("sans-serif",CUSTOM_TYPEFACE), 0, firstWord.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
spannable.setSpan( new CustomTypefaceSpan("sans-serif",SECOND_CUSTOM_TYPEFACE), firstWord.length(), firstWord.length() + secondWord.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

// Set the text of a textView with the spannable object
textView.setText( spannable );

Answer 2

这是一个更直接的解决方案，您可以使用 HTML 在同一个TextView.

例如：

// Styled label
String styledText = "<big><b><font color='#333333'>title</font></b></big> <small><b><font color='#CC5490'>subtitle</font></b></small>";

// Apply the styled label on the TextView
textView.setText(Html.fromHtml(styledText));

您需要以下导入：

import android.text.Html;