91

我有 Spannable 对象，我想通过我之前加载的自定义字体来设置它的字体。

Typeface tf = Typeface.createFromAsset(getAssets(), "fonts/font_Name.ttf");
Spannable span1 = /*Spannable Item*/;

/// I want to set span1 to have tf font face???
/// Here where I want help.

编辑：
我的问题是我想为文本视图设置两种不同的自定义字体，所以我正在使用 Spannable

4

10 回答 10

231

这是一个迟到的答案，但会帮助其他人解决这个问题。

使用以下代码：（我使用的是孟加拉语和泰米尔语字体）

  TextView txt = (TextView) findViewById(R.id.custom_fonts);  
        txt.setTextSize(30);
        Typeface font = Typeface.createFromAsset(getAssets(), "Akshar.ttf");
        Typeface font2 = Typeface.createFromAsset(getAssets(), "bangla.ttf");   
        SpannableStringBuilder SS = new SpannableStringBuilder("আমারநல்வரவு");
        SS.setSpan (new CustomTypefaceSpan("", font2), 0, 4,Spanned.SPAN_EXCLUSIVE_INCLUSIVE);
        SS.setSpan (new CustomTypefaceSpan("", font), 4, 11,Spanned.SPAN_EXCLUSIVE_INCLUSIVE);
        txt.setText(SS);

结果是：

在此处输入图像描述

CustomTypefaceSpan 类：

package my.app;
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);
}
}

参考

于 2012-05-24T16:03:17.670 回答
28

创建一个 CustomTypefaceSpan 类：

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

public class CustomTypefaceSpan extends MetricAffectingSpan {

    private final Typeface typeface;

    public CustomTypefaceSpan(Typeface typeface) {
        this.typeface = typeface;
    }

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

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

    private static void applyCustomTypeFace(Paint paint, Typeface tf) {
        paint.setTypeface(tf);
    }
}

使用方式与 Android 框架跨类相同：

    TextView textView = (TextView) findViewById(R.id.custom_fonts);
    Typeface font = Typeface.createFromAsset(getAssets(), "Akshar.ttf");
    Typeface font2 = Typeface.createFromAsset(getAssets(), "bangla.ttf");
    SpannableStringBuilder spannableStringBuilder = new SpannableStringBuilder("আমারநல்வரவு");
    spannableStringBuilder.setSpan (new CustomTypefaceSpan(font2), 0, 4,Spanned.SPAN_EXCLUSIVE_INCLUSIVE);
    spannableStringBuilder.setSpan (new CustomTypefaceSpan(font), 4, 11,Spanned.SPAN_EXCLUSIVE_INCLUSIVE);
    textView.setText(spannableStringBuilder);

此答案基于 Imran Rana 的答案，但不会扩展TypefaceSpan然后禁用其功能。CustomTypefaceSpan直接延伸MetricAffectingSpan。

这个答案与 Imran Rana 的答案有共同的缺陷。跨度没有被分割。即如果你这样做（kotlin）：

    val parcel = Parcel.obtain()
    TextUtils.writeToParcel(spannableStringBuilder, parcel, 0)
    parcel.setDataPosition(0)
    val sequence = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(parcel)
    parcel.recycle()

设置的任何CustomTypefaceSpan对象spannableStringBuilder都不会被编组和解组。

于 2017-09-22T08:13:37.977 回答
20

我们不需要使用 CustomTypefaceSpan。这是使用StyleSpan的解决方案。

/**
* setCustomFontTypeSpan
* @param context
* @param source
* @param startIndex
* @param endIndex
* @param font
* @return
*/
public static SpannableString setCustomFontTypeSpan(Context context, String 
source, int startIndex, int endIndex, int font) {
      final SpannableString spannableString = new SpannableString(source);
      Typeface typeface = ResourcesCompat.getFont(context, font);
      spannableString.setSpan(new StyleSpan(typeface.getStyle()), 
      startIndex,endIndex,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
return spannableString;
}

String source = "Hello world";
SpannableString string = setCustomFontTypeSpan(context, source, 6, 
source.length(), R.font.open_sans_bold);
textView.setText(string);
于 2018-07-17T09:50:32.390 回答
16

如果您使用的是 Roboto，您可以在构造函数中设置不同的 TypefaceSpan

TypefaceSpan typefaceSpan = new TypefaceSpan("sans-serif-medium");

textView.setSpan(typefaceSpan, indexStart, textLength, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
于 2016-03-04T19:52:20.100 回答
7

如果您使用的是安卓 KTX buildSpannable{...}，

我推荐这个。

inline fun SpannableStringBuilder.font(typeface: Typeface? = null, builderAction: SpannableStringBuilder.() -> Unit) =
    inSpans(StyleSpan(typeface?.style ?: Typeface.DEFAULT.style), builderAction = builderAction)

用法

binding.title.text = buildSpannedString {
    color(getColor(R.color.main_mint)) {
        font(getFont(R.font.notosans_medium)) {
            append("colored and typefaced")
        }
    }
}
于 2021-01-07T03:44:22.653 回答
5

>= API 28 的更新、更简单的答案

val myTypeface = Typeface.create(ResourcesCompat.getFont(context, R.font.acme), Typeface.NORMAL)
val string = SpannableString("Text with typeface span.")
string.setSpan(TypefaceSpan(myTypeface), 10, 18, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
string.setSpan(TypefaceSpan("monospace"), 19, 22, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)

textView.text = string
于 2020-08-20T21:47:33.630 回答
5

在 kotlin 中将是：

第一步，创建这个类

class CustomTypefaceSpan(family: String?, private val newType: Typeface) :
  TypefaceSpan(family) {
  override fun updateDrawState(ds: TextPaint) {
      applyCustomTypeFace(ds, newType)
  }

  override fun updateMeasureState(paint: TextPaint) {
      applyCustomTypeFace(paint, newType)
  }

  companion object {
      private fun applyCustomTypeFace(paint: Paint, tf: Typeface) {
          val oldStyle: Int
          val old = paint.typeface
          oldStyle = old?.style ?: 0
          val fake = oldStyle and tf.style.inv()
          if (fake and Typeface.BOLD != 0) {
              paint.isFakeBoldText = true
          }
          if (fake and Typeface.ITALIC != 0) {
              paint.textSkewX = -0.25f
          }
          paint.typeface = tf
      }
  }

}

第二步，

    val prefixText = SpannableString("I read and accept ")
    val prefixTextLen = prefixText.length

    prefixText.setSpan(
        CustomTypefaceSpan("", ResourcesCompat.getFont(context, R.font.gotham_bold)!!),
        0,
        prefixTextLen,
        0
    )
于 2020-02-08T13:20:49.713 回答
1

尝试先将您设置Spannable为您的TextView，然后尝试将字体分配给您的TextViewwith myTextView.setTypeface(tf);

于 2011-07-07T14:48:10.660 回答
1

我也想做同样的事情，但我发现我需要使用 TypefaceSpan。问题是采用 Typeface 的构造函数仅在 API 级别 28 中添加。所以我找到的解决方法是执行以下操作：

val spannable = SpannableString("My String")
spannable.setSpan(object : TypefaceSpan(null) {
    override fun updateDrawState(ds: TextPaint) {
        ds.typeface = Typeface.create(ResourcesCompat.getFont(context, R.font.my_font), Typeface.NORMAL) // To change according to your need
    }
}, start, end, Spannable.SPAN_INCLUSIVE_EXCLUSIVE) // To change according to your need
myTextView.setText(spannable)
于 2021-02-13T18:47:57.120 回答
-1

这是一个示例，其中 str 是您的完整字符串，而 boldString 是您需要加粗的部分。

public static SpannableString getTextStyleSpan(String str, String boldString) {

        SpannableString formated = new SpannableString(str);

        int start1 = str.indexOf(boldString);
        int end1 = start1 + colorString1.length();

        formated.setSpan(new android.text.style.StyleSpan(android.graphics.Typeface.BOLD), start1, end1, Spannable.SPAN_INCLUSIVE_INCLUSIVE);
        return formated;
    }
于 2016-04-28T15:22:42.287 回答