blocks|key|1023288|text|嗯，我不知道如何使用可用的类，所以我自己扩展了TypefaceSpan，现在它对我起作用了。下面是我所做的：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1023289|package+de.myproject.text.style;

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);
++++}
}|code-block|syntax|javascript|1023290|entityMap^0|N|C|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

Well I couldn't figure out how to do it with the available classes so I extended the <code>TypefaceSpan</code> on my own an now it works for me. Here is what I did:

<pre><code>package de.myproject.text.style;

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

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

 paint.setTypeface(tf);
 }
}
</code></pre>

blocks|key|808578|text|虽然notme基本上没有正确的想法，但给出的解决方案有点老生常谈，因为“家庭”变得多余。这也是不正确的，因为TypefaceSpan是安卓知道的特殊跨度之一，并期望关于ParcelableSpan接口的某些行为(notme的子类没有正确实现，也不可能实现)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|808579|更简单、更准确的解决方案是：|808580|public+class+CustomTypefaceSpan+extends+MetricAffectingSpan
{
++++private+final+Typeface+typeface;

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

++++@Override
++++public+void+updateDrawState(final+TextPaint+drawState)
++++{
++++++++apply(drawState);
++++}

++++@Override
++++public+void+updateMeasureState(final+TextPaint+paint)
++++{
++++++++apply(paint);
++++}

++++private+void+apply(final+Paint+paint)
++++{
++++++++final+Typeface+oldTypeface+=+paint.getTypeface();
++++++++final+int+oldStyle+=+oldTypeface+!=+null+?+oldTypeface.getStyle()+:+0;
++++++++final+int+fakeStyle+=+oldStyle+&+~typeface.getStyle();

++++++++if+((fakeStyle+&+Typeface.BOLD)+!=+0)
++++++++{
++++++++++++paint.setFakeBoldText(true);
++++++++}

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

++++++++paint.setTypeface(typeface);
++++}
}|code-block|syntax|javascript|808581|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Whilst notme has essentially the right idea, the solution given is a bit hacky as "family" becomes redundant. It is also slightly incorrect because TypefaceSpan is one of the special spans that Android knows about and expects certain behaviour with respect to the ParcelableSpan interface (which notme's subclass does not properly, nor is it possible to, implement).

A simpler and more accurate solution would be:

<pre><code>public class CustomTypefaceSpan extends MetricAffectingSpan
{
 private final Typeface typeface;

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

 @Override
 public void updateDrawState(final TextPaint drawState)
 {
 apply(drawState);
 }

 @Override
 public void updateMeasureState(final TextPaint paint)
 {
 apply(paint);
 }

 private void apply(final Paint paint)
 {
 final Typeface oldTypeface = paint.getTypeface();
 final int oldStyle = oldTypeface != null ? oldTypeface.getStyle() : 0;
 final int fakeStyle = oldStyle &amp; ~typeface.getStyle();

 if ((fakeStyle &amp; Typeface.BOLD) != 0)
 {
 paint.setFakeBoldText(true);
 }

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

 paint.setTypeface(typeface);
 }
}
</code></pre>

blocks|key|808631|text|如果有人感兴趣，这里是本杰明代码的C#+Xamarin版本：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|808632|using+System;
using+Android.Graphics;
using+Android.Text;
using+Android.Text.Style;

namespace+Utils
{
++++//https://stackoverflow.com/a/17961854/1996780
++++///+<summary>A+text+span+which+applies+<see+cref="Android.Graphics.Typeface"/>+on+text</summary>
++++internal+class+CustomFontSpan+:+MetricAffectingSpan
++++{
++++++++///+<summary>The+typeface+to+apply</summary>
++++++++public+Typeface+Typeface+{+get;+}

++++++++///+<summary>CTor+-+creates+a+new+instance+of+the+<see+cref="CustomFontSpan"/>+class</summary>
++++++++///+<param+name="typeface">Typeface+to+apply</param>
++++++++///+<exception+cref="ArgumentNullException"><paramref+name="typeface"/>+is+null</exception>
++++++++public+CustomFontSpan(Typeface+typeface)+=>
++++++++++++Typeface+=+typeface+??+throw+new+ArgumentNullException(nameof(typeface));


++++++++public+override+void+UpdateDrawState(TextPaint+drawState)+=>+Apply(drawState);

++++++++public+override+void+UpdateMeasureState(TextPaint+paint)+=>+Apply(paint);

++++++++///+<summary>Applies+<see+cref="Typeface"/></summary>
++++++++///+<param+name="paint"><see+cref="Paint"/>+to+apply+<see+cref="Typeface"/>+on</param>
++++++++private+void+Apply(Paint+paint)
++++++++{
++++++++++++Typeface+oldTypeface+=+paint.Typeface;
++++++++++++var+oldStyle+=+oldTypeface+!=+null+?+oldTypeface.Style+:+0;
++++++++++++var+fakeStyle+=+oldStyle+&+Typeface.Style;

++++++++++++if+(fakeStyle.HasFlag(TypefaceStyle.Bold))
++++++++++++++++paint.FakeBoldText+=+true;

++++++++++++if+(fakeStyle.HasFlag(TypefaceStyle.Italic))
++++++++++++++++paint.TextSkewX+=+-0.25f;

++++++++++++paint.SetTypeface(Typeface);
++++++++}
++++}
}|code-block|syntax|javascript|808633|用法：(在activity+OnCreate中)|808634|var+txwLogo+=+FindViewById<TextView>(Resource.Id.logo);
var+font+=+Resources.GetFont(Resource.Font.myFont);

var+wordtoSpan+=+new+SpannableString(txwLogo.Text);
wordtoSpan.SetSpan(new+CustomFontSpan(font),+6,+7,+SpanTypes.InclusiveInclusive);+//One+caracter
txwLogo.TextFormatted+=+wordtoSpan;++|808635|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

If anybody would be interested here's C# Xamarin version of Benjamin's code:

<pre><code>using System;
using Android.Graphics;
using Android.Text;
using Android.Text.Style;

namespace Utils
{
 //https://stackoverflow.com/a/17961854/1996780
 /// &lt;summary&gt;A text span which applies &lt;see cref="Android.Graphics.Typeface"/&gt; on text&lt;/summary&gt;
 internal class CustomFontSpan : MetricAffectingSpan
 {
 /// &lt;summary&gt;The typeface to apply&lt;/summary&gt;
 public Typeface Typeface { get; }

 /// &lt;summary&gt;CTor - creates a new instance of the &lt;see cref="CustomFontSpan"/&gt; class&lt;/summary&gt;
 /// &lt;param name="typeface"&gt;Typeface to apply&lt;/param&gt;
 /// &lt;exception cref="ArgumentNullException"&gt;&lt;paramref name="typeface"/&gt; is null&lt;/exception&gt;
 public CustomFontSpan(Typeface typeface) =&gt;
 Typeface = typeface ?? throw new ArgumentNullException(nameof(typeface));


 public override void UpdateDrawState(TextPaint drawState) =&gt; Apply(drawState);

 public override void UpdateMeasureState(TextPaint paint) =&gt; Apply(paint);

 /// &lt;summary&gt;Applies &lt;see cref="Typeface"/&gt;&lt;/summary&gt;
 /// &lt;param name="paint"&gt;&lt;see cref="Paint"/&gt; to apply &lt;see cref="Typeface"/&gt; on&lt;/param&gt;
 private void Apply(Paint paint)
 {
 Typeface oldTypeface = paint.Typeface;
 var oldStyle = oldTypeface != null ? oldTypeface.Style : 0;
 var fakeStyle = oldStyle &amp; Typeface.Style;

 if (fakeStyle.HasFlag(TypefaceStyle.Bold))
 paint.FakeBoldText = true;

 if (fakeStyle.HasFlag(TypefaceStyle.Italic))
 paint.TextSkewX = -0.25f;

 paint.SetTypeface(Typeface);
 }
 }
}
</code></pre>

And usage: (in activity OnCreate)

<pre><code>var txwLogo = FindViewById&lt;TextView&gt;(Resource.Id.logo);
var font = Resources.GetFont(Resource.Font.myFont);

var wordtoSpan = new SpannableString(txwLogo.Text);
wordtoSpan.SetSpan(new CustomFontSpan(font), 6, 7, SpanTypes.InclusiveInclusive); //One caracter
txwLogo.TextFormatted = wordtoSpan; 
</code></pre>

I have not found a way to do this. Is it possible?

How can I use TypefaceSpan or StyleSpan with a custom Typeface?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我还没有找到这样做的方法。有可能吗？

问如何将TypefaceSpan或StyleSpan与自定义字体一起使用？
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问如何将TypefaceSpan或StyleSpan与自定义字体一起使用？
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