blocks|key|1163421|text|((TextView)findViewById(R.id.text)).setText(Html.fromHtml("X2"));|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1163422|或|unstyled|1163423|Common+Tasks+and+How+to+Do+Them+in+Android|offset|length|1163424|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.android.com/guide/faq/commontasks.html#selectingtext^0|0|0|0|16|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|T|8|@]|9|@]|A|$]]|$1|G|3|H|5|F|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|F|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

<pre><code>((TextView)findViewById(R.id.text)).setText(Html.fromHtml("X&lt;sup&gt;2&lt;/sup&gt;"));
</code></pre>

or

<a href="http://developer.android.com/guide/faq/commontasks.html#selectingtext" rel="noreferrer">Common Tasks and How to Do Them in Android</a>

blocks|key|949379|text|示例：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|949380|equation+=+(TextView)+findViewById(R.id.textView1);
SpannableStringBuilder+cs+=+new+SpannableStringBuilder("X3+%2B+X2");
cs.setSpan(new+SuperscriptSpan(),+1,+2,+Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
cs.setSpan(new+RelativeSizeSpan(0.75f),+1,+2,+Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
cs.setSpan(new+SuperscriptSpan(),+6,+7,+Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
cs.setSpan(new+RelativeSizeSpan(0.75f),+6,+7,+Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
equation.setText(cs);|code-block|syntax|javascript|949381|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Example:

<pre><code>equation = (TextView) findViewById(R.id.textView1);
SpannableStringBuilder cs = new SpannableStringBuilder("X3 + X2");
cs.setSpan(new SuperscriptSpan(), 1, 2, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
cs.setSpan(new RelativeSizeSpan(0.75f), 1, 2, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
cs.setSpan(new SuperscriptSpan(), 6, 7, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
cs.setSpan(new RelativeSizeSpan(0.75f), 6, 7, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
equation.setText(cs);
</code></pre>

blocks|key|1163533|text|对于所有人的问题，如果你想让它变得更小，除了制作上标或下标之外，你只需要添加标签。例如：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1163534|"X++2+"|code-block|syntax|javascript|1163535|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

To all people asking, if you want to make it smaller besides of making super or subscript, you just need to add tag as well. EX: 

<pre><code>"X &lt;sup&gt;&lt;small&gt; 2 &lt;/small&gt;&lt;/sup&gt;"
</code></pre>

blocks|key|949693|text|在代码中，只需将"\u00B2“如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|949694|textView.setText("X\u00B2");|offset|length|style|CODE|949695|entityMap^0|0|0|S|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@$D|L|E|M|F|G]]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

In the code just put this "\u00B2" Like this:

<code>textView.setText("X\u00B2");</code>

blocks|key|1163631|text|它有点晚了，但下面的代码运行正常，使用上标作为特殊字符，我在这里使用了空格字符。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1163632|<string+name="str">H₂</string>|code-block|syntax|javascript|1163633|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

It bit late but following just work fine, use superscript as special character, I used spacial char here.

<pre><code>&lt;string name="str"&gt;H₂&lt;/string&gt;
</code></pre>

blocks|key|1163591|text|((TextView)findViewById(R.id.text)).setText(Html.fromHtml("X2"));+|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1163592|(或)来自字符串资源文件：|unstyled|1163593|<string+name="test_string">
++<![CDATA[+X2+]]>
</string>|1163594|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|L|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|I|3|-4|5|F|7|N|8|@]|9|@]|A|$]]]|J|$]]

<pre><code>((TextView)findViewById(R.id.text)).setText(Html.fromHtml("X&lt;sup&gt;&lt;small&gt;2&lt;/small&gt;&lt;/sup&gt;")); 
</code></pre>

(or) From String Resource File:

<pre><code>&lt;string name="test_string"&gt;
 &lt;![CDATA[ X&lt;sup&gt;&lt;small&gt;2&lt;/small&gt;&lt;/sup&gt; ]]&gt;
&lt;/string&gt;
</code></pre>

blocks|key|1163743|text|从API24开始，HTML.fromHTML(字符串)已被弃用。他们说用这个来代替，它支持将标志作为参数。因此，从公认的答案出发：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1163744|TextView+textView+=+((TextView)findViewById(R.id.text));
textView.setText(Html.fromHtml("X2",+Html.FROM_HTML_MODE_LEGACY));|code-block|syntax|javascript|1163745|如果你想让代码也考虑24版本之前的API：|1163746|TextView+textView+=+((TextView)findViewById(R.id.text));
if+(android.os.Build.VERSION.SDK_INT+>=+android.os.Build.VERSION_CODES.N)+{
++textView.setText(Html.fromHtml("X2",+Html.FROM_HTML_MODE_LEGACY));
}+else+{
++++textView.setText(Html.fromHtml("X2"));++++
}|1163747|这个答案来自：https://stackoverflow.com/a/37905107/4998704|offset|length|1163748|可以在以下位置找到标志和其他文档：https://developer.android.com/reference/android/text/Html.html|1163749|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/37905107/4998704|1|https://developer.android.com/reference/android/text/Html.html^0|0|0|0|0|7|18|0|0|H|1Q|1|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|12|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|14|8|@]|9|@$M|15|N|16|1|17]]|A|$]]|$1|O|3|P|5|6|7|18|8|@]|9|@$M|19|N|1A|1|1B]]|A|$]]|$1|Q|3|-4|5|6|7|1C|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X]]|Y|$5|T|U|V|A|$W|Z]]]]

The HTML.fromHTML(String) was deprecated as of API 24. They say to use this one instead, which supports flags as a parameter. So to go off of the accepted answer:

<pre><code>TextView textView = ((TextView)findViewById(R.id.text));
textView.setText(Html.fromHtml("X&lt;sup&gt;2&lt;/sup&gt;", Html.FROM_HTML_MODE_LEGACY));
</code></pre>

And if you want code that considers pre-24 API's as well:

<pre><code>TextView textView = ((TextView)findViewById(R.id.text));
if (android.os.Build.VERSION.SDK_INT &gt;= android.os.Build.VERSION_CODES.N) {
 textView.setText(Html.fromHtml("X&lt;sup&gt;2&lt;/sup&gt;", Html.FROM_HTML_MODE_LEGACY));
} else {
 textView.setText(Html.fromHtml("X&lt;sup&gt;2&lt;/sup&gt;")); 
}
</code></pre>

This answer was derived from: 
<a href="https://stackoverflow.com/a/37905107/4998704">https://stackoverflow.com/a/37905107/4998704</a>

The flags and other documentation can be found here:
<a href="https://developer.android.com/reference/android/text/Html.html" rel="nofollow noreferrer">https://developer.android.com/reference/android/text/Html.html</a>

blocks|key|949346|text|我在this上找到了一篇关于如何使用Spannable或字符串资源文件的文章：或，分别表示上标和下标。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|949347|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.android.com/guide/appendix/faq/commontasks.html^0|I|9|13|5|19|5|2|4|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]|$9|Q|A|R|B|C]|$9|S|A|T|B|C]]|D|@$9|U|A|V|1|W]]|E|$]]|$1|F|3|-4|5|6|7|X|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

I found <a href="http://developer.android.com/guide/appendix/faq/commontasks.html" rel="nofollow noreferrer">this</a> article on how to use a <code>Spannable</code> or in a string resource file: <code>&lt;sup&gt;</code> or <code>&lt;sub&gt;</code> for superscript and subscript, respectively.

blocks|key|949963|text|基于Gerardo的答案here，我在Int上创建了这个扩展|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|949964|fun+Int.toSuperScript():+String+{
++++return+when+(this)+{
++++++++0+->+"\u2070"
++++++++1+->+"\u00B9"
++++++++2+->+"\u00B2"
++++++++3+->+"\u00B3"
++++++++4+->+"\u2074"
++++++++5+->+"\u2075"
++++++++6+->+"\u2076"
++++++++7+->+"\u2077"
++++++++8+->+"\u2078"
++++++++9+->+"\u2079"
++++++++else+->+""
}|code-block|syntax|javascript|949965|}|949966|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/48794436/969016^0|C|4|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|X|8|@]|9|@]|C|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]]]

Based on Gerardo's answer <a href="https://stackoverflow.com/a/48794436/969016">here</a> I created this extension on Int
<pre><code>fun Int.toSuperScript(): String {
 return when (this) {
 0 -&gt; &quot;\u2070&quot;
 1 -&gt; &quot;\u00B9&quot;
 2 -&gt; &quot;\u00B2&quot;
 3 -&gt; &quot;\u00B3&quot;
 4 -&gt; &quot;\u2074&quot;
 5 -&gt; &quot;\u2075&quot;
 6 -&gt; &quot;\u2076&quot;
 7 -&gt; &quot;\u2077&quot;
 8 -&gt; &quot;\u2078&quot;
 9 -&gt; &quot;\u2079&quot;
 else -&gt; &quot;&quot;
}
</code></pre>
}

blocks|key|949588|text|它们被称为Unicode字符，Android+TextView支持它们。从这个维基中复制你想要的超级/子脚本：https://en.wikipedia.org/wiki/List_of_Unicode_characters#Superscripts_and_Subscripts|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|949589|entityMap|0|LINK|mutability|MUTABLE|url|https://en.wikipedia.org/wiki/List_of_Unicode_characters#Superscripts_and_Subscripts^0|N|8|1J|2C|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]]|D|@$9|Q|A|R|1|S]]|E|$]]|$1|F|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

They are called Unicode characters, and Android <code>TextView</code> supports them. Copy the super/sub-script you want from this Wiki: <a href="https://en.wikipedia.org/wiki/List_of_Unicode_characters#Superscripts_and_Subscripts" rel="nofollow">https://en.wikipedia.org/wiki/List_of_Unicode_characters#Superscripts_and_Subscripts</a>

How can you print a string with a subscript or superscript? Can you do this without an external library? I want this to display in a <code>TextView</code> in Android.

Subscript and Superscript a String in Android

Android

如何打印带有下标或上标的字符串？你能在没有外部库的情况下做到这一点吗？我希望这个显示在安卓的TextView中。

问Android中字符串的下标和上标
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回答 10

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