blocks|key|715611|text|如果你需要android资源dimen作为int，你可以在你的代码中这样做：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|715612|context.getResources().getDimensionPixelSize(R.dimen.your_dimen_res);|code-block|syntax|javascript|715613|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|$]]

If you need the android resource dimen as a int you can do this in your code:

<pre><code>context.getResources().getDimensionPixelSize(R.dimen.your_dimen_res);
</code></pre>

blocks|key|715704|text|我自己需要它，所以我写了一个类来处理它。此答案中的所有代码均在Apache+License+2.0下获得许可。好好享受吧。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|715705|有两个静态方法模拟两个TypedValue方法。DimensionConverter.stringToDimension()模拟TypedValue.complexToDimension。DimensionConverter.stringToDimensionPixelSize()模仿TypedValue.complexToDimensionPixelSize。|715706|支持所有当前单位。将接受像"33sp"，“44+dp”这样的维度字符串，并抛出错误格式的异常。|715707|简单易用：|715708|String+dimension+=+"38dp";
Log.i(TAG,+"Testing:+"+%2B+dimension);
try+{
++++Log.i(TAG,+"Converts+to:+"+%2B+DimensionConverter.stringToDimension(dimension,+resources.getDisplayMetrics()));
}+catch+(NumberFormatException+exception)+{
++++Log.i(TAG,+"Unable+to+convert.");
}|code-block|syntax|javascript|715709|类在这里：|715710|public+class+DimensionConverter+{

++++//+--+Initialize+dimension+string+to+constant+lookup.
++++public+static+final+Map<String,+Integer>+dimensionConstantLookup+=+initDimensionConstantLookup();
++++private+static+Map<String,+Integer>+initDimensionConstantLookup()+{
++++++++Map<String,+Integer>+m+=+new+HashMap<String,+Integer>();++
++++++++m.put("px",+TypedValue.COMPLEX_UNIT_PX);
++++++++m.put("dip",+TypedValue.COMPLEX_UNIT_DIP);
++++++++m.put("dp",+TypedValue.COMPLEX_UNIT_DIP);
++++++++m.put("sp",+TypedValue.COMPLEX_UNIT_SP);
++++++++m.put("pt",+TypedValue.COMPLEX_UNIT_PT);
++++++++m.put("in",+TypedValue.COMPLEX_UNIT_IN);
++++++++m.put("mm",+TypedValue.COMPLEX_UNIT_MM);
++++++++return+Collections.unmodifiableMap(m);++
++++}
++++//+--+Initialize+pattern+for+dimension+string.
++++private+static+final+Pattern+DIMENSION_PATTERN+=+Pattern.compile("%5E\\s*(\\d%2B(\\.\\d%2B)*)\\s*([a-zA-Z]%2B)\\s*$");

++++public+static+int+stringToDimensionPixelSize(String+dimension,+DisplayMetrics+metrics)+{
++++++++//+--+Mimics+TypedValue.complexToDimensionPixelSize(int+data,+DisplayMetrics+metrics).
++++++++InternalDimension+internalDimension+=+stringToInternalDimension(dimension);
++++++++final+float+value+=+internalDimension.value;
++++++++final+float+f+=+TypedValue.applyDimension(internalDimension.unit,+value,+metrics);
++++++++final+int+res+=+(int)(f%2B0.5f);
++++++++if+(res+!=+0)+return+res;
++++++++if+(value+==+0)+return+0;
++++++++if+(value+>+0)+return+1;
++++++++return+-1;
++++}

++++public+static+float+stringToDimension(String+dimension,+DisplayMetrics+metrics)+{
++++++++//+--+Mimics+TypedValue.complexToDimension(int+data,+DisplayMetrics+metrics).
++++++++InternalDimension+internalDimension+=+stringToInternalDimension(dimension);
++++++++return+TypedValue.applyDimension(internalDimension.unit,+internalDimension.value,+metrics);
++++}

++++private+static+InternalDimension+stringToInternalDimension(String+dimension)+{
++++++++//+--+Match+target+against+pattern.
++++++++Matcher+matcher+=+DIMENSION_PATTERN.matcher(dimension);
++++++++if+(matcher.matches())+{
++++++++++++//+--+Match+found.
++++++++++++//+--+Extract+value.
++++++++++++float+value+=+Float.valueOf(matcher.group(1)).floatValue();
++++++++++++//+--+Extract+dimension+units.
++++++++++++String+unit+=+matcher.group(3).toLowerCase();
++++++++++++//+--+Get+Android+dimension+constant.
++++++++++++Integer+dimensionUnit+=+dimensionConstantLookup.get(unit);
++++++++++++if+(dimensionUnit+==+null)+{
++++++++++++++++//+--+Invalid+format.
++++++++++++++++throw+new+NumberFormatException();
++++++++++++}+else+{
++++++++++++++++//+--+Return+valid+dimension.
++++++++++++++++return+new+InternalDimension(value,+dimensionUnit);
++++++++++++}
++++++++}+else+{
++++++++++++//+--+Invalid+format.
++++++++++++throw+new+NumberFormatException();
++++++++}++++++++
++++}

++++private+static+class+InternalDimension+{
++++++++float+value;
++++++++int+unit;

++++++++public+InternalDimension(float+value,+int+unit)+{
++++++++++++this.value+=+value;
++++++++++++this.unit+=+unit;
++++++++}
++++}
}|715711|entityMap|0|LINK|mutability|MUTABLE|url|http://www.apache.org/licenses/LICENSE-2.0.html|1|http://developer.android.com/reference/android/util/TypedValue.html|2|http://developer.android.com/reference/android/util/TypedValue.html#complexToDimension%2528int,%2520android.util.DisplayMetrics%2529|3|http://developer.android.com/reference/android/util/TypedValue.html#complexToDimensionPixelSize%2528int,%2520android.util.DisplayMetrics%2529^0|V|I|0|0|B|A|1|1S|T|2|3Z|12|3|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|16|8|@]|9|@$A|17|B|18|1|19]]|C|$]]|$1|D|3|E|5|6|7|1A|8|@]|9|@$A|1B|B|1C|1|1D]|$A|1E|B|1F|1|1G]|$A|1H|B|1I|1|1J]]|C|$]]|$1|F|3|G|5|6|7|1K|8|@]|9|@]|C|$]]|$1|H|3|I|5|6|7|1L|8|@]|9|@]|C|$]]|$1|J|3|K|5|L|7|1M|8|@]|9|@]|C|$M|N]]|$1|O|3|P|5|6|7|1N|8|@]|9|@]|C|$]]|$1|Q|3|R|5|L|7|1O|8|@]|9|@]|C|$M|N]]|$1|S|3|-4|5|6|7|1P|8|@]|9|@]|C|$]]]|T|$U|$5|V|W|X|C|$Y|Z]]|10|$5|V|W|X|C|$Y|11]]|12|$5|V|W|X|C|$Y|13]]|14|$5|V|W|X|C|$Y|15]]]]

I needed this myself so I wrote a class to handle it. All code in this answer is licensed under <a href="http://www.apache.org/licenses/LICENSE-2.0.html">Apache License 2.0</a>. Enjoy.

There are two static methods that mimic two <a href="http://developer.android.com/reference/android/util/TypedValue.html">TypedValue</a> methods. DimensionConverter.stringToDimension() mimics <a href="http://developer.android.com/reference/android/util/TypedValue.html#complexToDimension%28int,%20android.util.DisplayMetrics%29">TypedValue.complexToDimension</a>. DimensionConverter.stringToDimensionPixelSize() mimics <a href="http://developer.android.com/reference/android/util/TypedValue.html#complexToDimensionPixelSize%28int,%20android.util.DisplayMetrics%29">TypedValue.complexToDimensionPixelSize</a>.

Supports all current units. Will accept dimension strings like "33sp", " 44 dp " and throw an exception for bad formats.

Simple to use:

<pre><code>String dimension = "38dp";
Log.i(TAG, "Testing: " + dimension);
try {
 Log.i(TAG, "Converts to: " + DimensionConverter.stringToDimension(dimension, resources.getDisplayMetrics()));
} catch (NumberFormatException exception) {
 Log.i(TAG, "Unable to convert.");
}
</code></pre>

Class here:

<pre><code>public class DimensionConverter {

 // -- Initialize dimension string to constant lookup.
 public static final Map&lt;String, Integer&gt; dimensionConstantLookup = initDimensionConstantLookup();
 private static Map&lt;String, Integer&gt; initDimensionConstantLookup() {
 Map&lt;String, Integer&gt; m = new HashMap&lt;String, Integer&gt;(); 
 m.put("px", TypedValue.COMPLEX_UNIT_PX);
 m.put("dip", TypedValue.COMPLEX_UNIT_DIP);
 m.put("dp", TypedValue.COMPLEX_UNIT_DIP);
 m.put("sp", TypedValue.COMPLEX_UNIT_SP);
 m.put("pt", TypedValue.COMPLEX_UNIT_PT);
 m.put("in", TypedValue.COMPLEX_UNIT_IN);
 m.put("mm", TypedValue.COMPLEX_UNIT_MM);
 return Collections.unmodifiableMap(m); 
 }
 // -- Initialize pattern for dimension string.
 private static final Pattern DIMENSION_PATTERN = Pattern.compile("^\\s*(\\d+(\\.\\d+)*)\\s*([a-zA-Z]+)\\s*$");

 public static int stringToDimensionPixelSize(String dimension, DisplayMetrics metrics) {
 // -- Mimics TypedValue.complexToDimensionPixelSize(int data, DisplayMetrics metrics).
 InternalDimension internalDimension = stringToInternalDimension(dimension);
 final float value = internalDimension.value;
 final float f = TypedValue.applyDimension(internalDimension.unit, value, metrics);
 final int res = (int)(f+0.5f);
 if (res != 0) return res;
 if (value == 0) return 0;
 if (value &gt; 0) return 1;
 return -1;
 }

 public static float stringToDimension(String dimension, DisplayMetrics metrics) {
 // -- Mimics TypedValue.complexToDimension(int data, DisplayMetrics metrics).
 InternalDimension internalDimension = stringToInternalDimension(dimension);
 return TypedValue.applyDimension(internalDimension.unit, internalDimension.value, metrics);
 }

 private static InternalDimension stringToInternalDimension(String dimension) {
 // -- Match target against pattern.
 Matcher matcher = DIMENSION_PATTERN.matcher(dimension);
 if (matcher.matches()) {
 // -- Match found.
 // -- Extract value.
 float value = Float.valueOf(matcher.group(1)).floatValue();
 // -- Extract dimension units.
 String unit = matcher.group(3).toLowerCase();
 // -- Get Android dimension constant.
 Integer dimensionUnit = dimensionConstantLookup.get(unit);
 if (dimensionUnit == null) {
 // -- Invalid format.
 throw new NumberFormatException();
 } else {
 // -- Return valid dimension.
 return new InternalDimension(value, dimensionUnit);
 }
 } else {
 // -- Invalid format.
 throw new NumberFormatException();
 } 
 }

 private static class InternalDimension {
 float value;
 int unit;

 public InternalDimension(float value, int unit) {
 this.value = value;
 this.unit = unit;
 }
 }
}
</code></pre>

I'm looking for a way to dynamically convert a String like <code>"30dp"</code> into an int that resembles the amount of pixels. This would mean that <code>StaticClass.theMethodImSearchingFor("16px")</code> would return <code>16</code>. 
My application will get these Strings dynamically and I need a way to store it as a pixel value to use later. 
I've already looked at the <a href="http://www.java2s.com/Open-Source/Android/android-core/platform-frameworks-base/Catalogplatform-frameworks-base.htm" rel="noreferrer">Android Source code</a>, mainly the classes <code>Resources</code>, <code>TypedArray</code> and <code>TypedValue</code>, but I couldn't find anything useful.

How to parse a dimension string and convert it to a dimension value

Android

我正在寻找一种方法来动态地将像"30dp"这样的字符串转换成一个类似于像素数的整数。这意味着StaticClass.theMethodImSearchingFor("16px")将返回16。我的应用程序将动态获取这些字符串，我需要一种方法将其存储为像素值以便以后使用。我已经研究过，主要是Resources、TypedA...

问如何解析维度字符串并将其转换为维度值
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