blocks|key|3853138|text|您看过android.graphics.Paint#measureText(String+txt)(http://developer.android.com/reference/android/graphics/Paint.html#measureText(java.lang.String%2529)?|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3853139|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.android.com/reference/android/graphics/Paint.html#measureText(java.lang.String%2529)?^0|1E|2S|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Have you looked at <a href="http://developer.android.com/reference/android/graphics/Paint.html#measureText(java.lang.String)" rel="nofollow noreferrer">android.graphics.Paint#measureText(String txt)</a>?

blocks|key|3853151|text|Paint+paint+=+new+Paint();
Rect+bounds+=+new+Rect();

int+text_height+=+0;
int+text_width+=+0;

paint.setTypeface(Typeface.DEFAULT);//+your+preference+here
paint.setTextSize(25);//+have+this+the+same+as+your+text+size

String+text+=+"Some+random+text";

paint.getTextBounds(text,+0,+text.length(),+bounds);

text_height+=++bounds.height();
text_width+=++bounds.width();|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|3853152|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>Paint paint = new Paint();
Rect bounds = new Rect();

int text_height = 0;
int text_width = 0;

paint.setTypeface(Typeface.DEFAULT);// your preference here
paint.setTextSize(25);// have this the same as your text size

String text = "Some random text";

paint.getTextBounds(text, 0, text.length(), bounds);

text_height = bounds.height();
text_width = bounds.width();
</code></pre>

blocks|key|738868|text|补充答案|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|738869|Paint.measureText和Paint.getTextBounds返回的宽度略有不同。measureText返回一个宽度，其中包含字形的advanceX值，填充字符串的开头和结尾。getTextBounds返回的Rect宽度没有这种填充，因为边界是将文本紧密换行的Rect。|CODE|738870|738871|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.android.com/reference/android/graphics/Paint.html#measureText(java.lang.String)|1|https://developer.android.com/reference/android/graphics/Paint.html#getTextBounds(java.lang.String,%2520int,%2520int,%2520android.graphics.Rect))^0|0|4|0|0|H|I|J|1B|B|2M|D|32|4|3S|4|0|H|0|I|J|1|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@$9|U|A|V|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|W|8|@$9|X|A|Y|B|H]|$9|Z|A|10|B|H]|$9|11|A|12|B|H]|$9|13|A|14|B|H]|$9|15|A|16|B|H]|$9|17|A|18|B|H]]|D|@$9|19|A|1A|1|1B]|$9|1C|A|1D|1|1E]]|E|$]]|$1|I|3|-4|5|6|7|1F|8|@]|D|@]|E|$]]|$1|J|3|-4|5|6|7|1G|8|@]|D|@]|E|$]]]|K|$L|$5|M|N|O|E|$P|Q]]|R|$5|M|N|O|E|$P|S]]]]

Supplemental answer

There is a slight difference between the width returned by <a href="https://developer.android.com/reference/android/graphics/Paint.html#measureText(java.lang.String)" rel="noreferrer"><code>Paint.measureText</code></a> and <a href="https://developer.android.com/reference/android/graphics/Paint.html#getTextBounds(java.lang.String,%20int,%20int,%20android.graphics.Rect)" rel="noreferrer"><code>Paint.getTextBounds</code></a>. <code>measureText</code> returns a width that includes the glyph's advanceX value padding the beginning and end of the string. The <code>Rect</code> width returned by <code>getTextBounds</code> does not have this padding because the bounds is the <code>Rect</code> that tightly wraps the text.

<a href="https://stackoverflow.com/a/7579469/3681880">source</a>

blocks|key|3853427|text|实际上，有三种不同的方法来测量文本。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3853428|GetTextBounds：|3853429|val+paint+=+Paint()
paint.typeface+=+ResourcesCompat.getFont(context,+R.font.kaushanscript)
paint.textSize+=+500f
paint.color+=+Color.argb(255,+3,+221,+252)
val+contents+=+"g"
val+rect+=+Rect()
paint.getTextBounds(contents,+0,+1,+rect)
val+width+=+rect.width()|code-block|syntax|javascript|3853430|MeasureTextWidth：|3853431|val+paint+=+Paint()
paint.typeface+=+ResourcesCompat.getFont(context,+R.font.kaushanscript)
paint.textSize+=+500f
paint.color+=+Color.argb(255,+3,+221,+252)
val+contents+=+"g"
val+width+=+paint.measureText(contents,+0,+1)|3853432|和getTextWidths：|3853433|val+paint+=+Paint()
paint.typeface+=+ResourcesCompat.getFont(context,+R.font.kaushanscript)
paint.textSize+=+500f
paint.color+=+Color.argb(255,+3,+221,+252)
val+contents+=+"g"
val+rect+=+Rect()
val+arry+=+FloatArray(contents.length)
paint.getTextBounds(contents,+0,+contents.length,+rect)
paint.getTextWidths(contents,+0,+contents.length,+arry)
val+width+=+ary.sum()|3853434|请注意，如果您正在尝试确定何时将文本换行到下一行，则getTextWidths可能会很有用。|3853435|measureTextWidth和getTextWidth是相等的，并且具有其他人发布的测量的高级宽度。有些人认为这个空间太大了。然而，这是非常主观的，并且依赖于字体。|3853436|例如，测量文本边界的宽度实际上可能看起来太小：|3853437|​|3853438|📷|atomic|offset|length|3853439|3853440|但是，当添加额外的文本时，一个字母的边界看起来很正常：|3853441|3853442|3853443|图片来自Android+Developers+Guide+to+Custom+Canvas+Drawing|3853444|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/1d26adc87784ee9256b224492d264aa4.png|imageAlt|1|https://i.stack.imgur.com/aKM8k.png|2|LINK|MUTABLE|url|https://jimbaca.com/android-developers-guide-to-custom-canvas-drawing/^0|0|0|0|0|0|0|0|0|0|0|0|0|1|0|0|0|0|0|1|1|0|0|4|1D|2|0^^$0|@$1|2|3|4|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1R|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|1S|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|1T|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|1U|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|1V|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|1W|8|@]|9|@]|A|$G|H]]|$1|Q|3|R|5|6|7|1X|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|1Y|8|@]|9|@]|A|$]]|$1|U|3|V|5|6|7|1Z|8|@]|9|@]|A|$]]|$1|W|3|X|5|6|7|20|8|@]|9|@]|A|$]]|$1|Y|3|Z|5|10|7|21|8|@]|9|@$11|22|12|23|1|24]]|A|$]]|$1|13|3|X|5|6|7|25|8|@]|9|@]|A|$]]|$1|14|3|15|5|6|7|26|8|@]|9|@]|A|$]]|$1|16|3|Z|5|10|7|27|8|@]|9|@$11|28|12|29|1|2A]]|A|$]]|$1|17|3|X|5|6|7|2B|8|@]|9|@]|A|$]]|$1|18|3|19|5|6|7|2C|8|@]|9|@$11|2D|12|2E|1|2F]]|A|$]]|$1|1A|3|-4|5|6|7|2G|8|@]|9|@]|A|$]]]|1B|$1C|$5|1D|1E|1F|A|$1G|1H|1I|-4]]|1J|$5|1D|1E|1F|A|$1G|1K|1I|-4]]|1L|$5|1M|1E|1N|A|$1O|1P]]]]

There's actually three different ways of measuring text.

GetTextBounds:

<pre><code>val paint = Paint()
paint.typeface = ResourcesCompat.getFont(context, R.font.kaushanscript)
paint.textSize = 500f
paint.color = Color.argb(255, 3, 221, 252)
val contents = "g"
val rect = Rect()
paint.getTextBounds(contents, 0, 1, rect)
val width = rect.width()
</code></pre>

MeasureTextWidth:

<pre><code>val paint = Paint()
paint.typeface = ResourcesCompat.getFont(context, R.font.kaushanscript)
paint.textSize = 500f
paint.color = Color.argb(255, 3, 221, 252)
val contents = "g"
val width = paint.measureText(contents, 0, 1)
</code></pre>

And getTextWidths:

<pre><code>val paint = Paint()
paint.typeface = ResourcesCompat.getFont(context, R.font.kaushanscript)
paint.textSize = 500f
paint.color = Color.argb(255, 3, 221, 252)
val contents = "g"
val rect = Rect()
val arry = FloatArray(contents.length)
paint.getTextBounds(contents, 0, contents.length, rect)
paint.getTextWidths(contents, 0, contents.length, arry)
val width = ary.sum()
</code></pre>

Note that getTextWidths could be useful if you are trying to determine when to wrap text to the next line.

The measureTextWidth and getTextWidth are equal and have the advanced width that measure that others have posted about. Some consider this space excessive. However, this is very subjective and dependent on the font. 

For example the width from measure text bounds may actually look too small:

<img src="https://i.stack.imgur.com/HsJ9Z.png" alt="measure text bounds looks small">

However when adding an additional text the bounds for one letter looks normal:
<img src="https://i.stack.imgur.com/aKM8k.png" alt="measure text bounds looks normal for strings">

Images taken from <a href="https://jimbaca.com/android-developers-guide-to-custom-canvas-drawing/" rel="noreferrer">Android Developers Guide to Custom Canvas Drawing</a>

blocks|key|1484265|text|我已经用不同的方式做到了：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1484266|String+finalVal+="Hiren+Patel";

Paint+paint+=+new+Paint();
paint.setTextSize(40);
Typeface+typeface+=+Typeface.createFromAsset(getAssets(),+"Helvetica.ttf");
paint.setTypeface(typeface);
paint.setColor(Color.BLACK);
paint.setStyle(Paint.Style.FILL);

Rect+result+=+new+Rect();
paint.getTextBounds(finalVal,+0,+finalVal.length(),+result);

Log.i("Text+dimensions",+"Width:+"%2Bresult.width()%2B"-Height:+"%2Bresult.height());|code-block|syntax|javascript|1484267|希望这能对你有所帮助。|1484268|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Well I have done in different way:

<pre><code>String finalVal ="Hiren Patel";

Paint paint = new Paint();
paint.setTextSize(40);
Typeface typeface = Typeface.createFromAsset(getAssets(), "Helvetica.ttf");
paint.setTypeface(typeface);
paint.setColor(Color.BLACK);
paint.setStyle(Paint.Style.FILL);

Rect result = new Rect();
paint.getTextBounds(finalVal, 0, finalVal.length(), result);

Log.i("Text dimensions", "Width: "+result.width()+"-Height: "+result.height());
</code></pre>

Hope this will help you.

blocks|key|3853180|text|我使用measureText()和getTextPath()%2BcomputeBounds()方法构建了一个包含https://github.com/ArminJo/android-blue-display/blob/master/TextWidth.xlsx下固定大小字体所有文本属性的Excel。在那里，您还可以找到其他文本属性的简单公式，如ascend等。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3853181|此存储库中还提供了用于生成excel中使用的原始值的app以及函数drawFontTest()。|3853182|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/ArminJo/android-blue-display/blob/master/TextWidth.xlsx|1|https://play.google.com/store/apps/details?id=de.joachimsmeyer.android.bluedisplay|2|https://github.com/ArminJo/android-blue-display/blob/master/src/de/joachimsmeyer/android/bluedisplay/RPCView.java^0|1J|22|0|0|Q|3|1|X|E|2|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@$A|S|B|T|1|U]]|C|$]]|$1|D|3|E|5|6|7|V|8|@]|9|@$A|W|B|X|1|Y]|$A|Z|B|10|1|11]]|C|$]]|$1|F|3|-4|5|6|7|12|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]|N|$5|I|J|K|C|$L|O]]|P|$5|I|J|K|C|$L|Q]]]]

I used the methods measureText() and getTextPath()+computeBounds() and build up an Excel with all text attributes for fixed size font that can be found under <a href="https://github.com/ArminJo/android-blue-display/blob/master/TextWidth.xlsx" rel="nofollow">https://github.com/ArminJo/android-blue-display/blob/master/TextWidth.xlsx</a> .
There you will find also simple formulas for other text attributes like ascend etc.

The <a href="https://play.google.com/store/apps/details?id=de.joachimsmeyer.android.bluedisplay" rel="nofollow">app</a> as well as the function <a href="https://github.com/ArminJo/android-blue-display/blob/master/src/de/joachimsmeyer/android/bluedisplay/RPCView.java" rel="nofollow">drawFontTest()</a> for generating the raw values used in the excel are also available in this repo.

blocks|key|738826|text|您可以使用"textPaint.getTextSize()“来获取文本宽度|type|unstyled|depth|inlineStyleRanges|entityRanges|data|738827|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

you can use "textPaint.getTextSize()" to get text width

Is there a method which returns the width ( in pixels ) of a text to be drawn on an Android canvas using the drawText() method according to the Paint used to draw it?

Measuring text width to be drawn on Canvas ( Android )

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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有没有一种方法可以根据绘制文本时使用的drawText()方法返回要在Android canvas上绘制的文本的宽度(以像素为单位)？

问测量要在画布上绘制的文本宽度( Android )
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回答 7

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问测量要在画布上绘制的文本宽度( Android )
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