blocks|key|2071412|text|使用dx。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2071413|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.android.com/guide/developing/tools/othertools.html#dx^0|2|2|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]]]]

Use <a href="http://developer.android.com/guide/developing/tools/othertools.html#dx" rel="noreferrer">dx</a>.

blocks|key|2067196|text|使用"--dex“选项调用"dx”命令，如下所示。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2067197|dx+--dex+--output=<output-file>+<input-file>|code-block|syntax|javascript|2067198|Android+SDK中包含dx命令。命令的位置会有所不同。尝试搜索：|2067199|<SDK-HOME>/platform-tools/
<SDK-HOME>/platforms/<platform>/tools/|2067200|"dx+--dex“可以接受一些选项。例如，"--no-strict“选项将跳过检查输入类文件的路径名是否与声明的包/类名匹配，因此如果使用此选项调用dx，您将获得不同于WebService.class的结果。如果您想在Android和Java上使用jar文件，那么"--keep-classes“选项可能会很有用。如果不使用"--keep-classes“选项，dx命令会将输入jar文件中的所有.class文件替换为一个名为"+classes.dex”的文件，但如果使用"--keep-classes“选项，则输入的.class文件也会进入输出文件以及classes.dex。|2067201|ex:
++dx+--dex+--keep-classes+--output=output.jar+input.jar|2067202|我阅读了dx的源代码，并列出了命令行选项，并在下面的页面中进行了一些解释。|2067203|dx+--dex的用法：|2067204|http://darutk-oboegaki.blogspot.com/2011/03/usage-of-dx-dex-dx-dex.html|offset|length|2067205|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|0|0|0|0|0|0|1Z|0|0^^$0|@$1|2|3|4|5|6|7|13|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|14|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|15|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|16|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|17|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|18|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|19|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1A|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|1B|8|@]|9|@$U|1C|V|1D|1|1E]]|A|$]]|$1|W|3|-4|5|6|7|1F|8|@]|9|@]|A|$]]]|X|$Y|$5|Z|10|11|A|$12|T]]]]

Invoke "dx" command with "--dex" option like the following.

<pre><code>dx --dex --output=&lt;output-file&gt; &lt;input-file&gt;
</code></pre>

"dx" command is contained in Android SDK. The location of the command varies. Try to search:

<pre><code>&lt;SDK-HOME&gt;/platform-tools/
&lt;SDK-HOME&gt;/platforms/&lt;platform&gt;/tools/
</code></pre>

"dx --dex" can accept some options. For example, "--no-strict" option will skip checking whether path names of input class files match the declared package/class names, so you'll get a different result for WebService.class if you invoke dx with this option. Probably, "--keep-classes" option is useful if you want to use jar files on both Android and Java SE. Without "--keep-classes" option, dx command replaces all .class files in an input jar file with one file named "classes.dex", but with "--keep-classes" option, input .class files also go into the ouput file as well as classes.dex.

<pre><code>ex:
 dx --dex --keep-classes --output=output.jar input.jar
</code></pre>

I read the source code of dx and listed up the command line options with some explanation at the following page.

Usage of dx --dex:

<a href="http://darutk-oboegaki.blogspot.com/2011/03/usage-of-dx-dex-dx-dex.html" rel="noreferrer">http://darutk-oboegaki.blogspot.com/2011/03/usage-of-dx-dex-dx-dex.html</a>

blocks|key|2071425|text|dalvik+docs区域包含一个trivial+example。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2071426|编辑：链接已死。您可以在镜像here中找到源树副本here和格式化版本。|style|BOLD|2071427|entityMap|0|LINK|mutability|MUTABLE|url|http://android.git.kernel.org/?p=platform/dalvik.git;a=blob_plain;f=docs/hello-world.html;hb=HEAD|1|http://milk.com/kodebase/dalvik-docs-mirror/docs/hello-world.html|2|https://android.googlesource.com/platform/dalvik/%2B/master/docs/hello-world.html^0|H|F|0|0|0|3|E|4|1|P|4|2|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@$A|U|B|V|1|W]]|C|$]]|$1|D|3|E|5|6|7|X|8|@$A|Y|B|Z|F|G]]|9|@$A|10|B|11|1|12]|$A|13|B|14|1|15]]|C|$]]|$1|H|3|-4|5|6|7|16|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]|P|$5|K|L|M|C|$N|Q]]|R|$5|K|L|M|C|$N|S]]]]

The dalvik docs area includes a <a href="http://android.git.kernel.org/?p=platform/dalvik.git;a=blob_plain;f=docs/hello-world.html;hb=HEAD" rel="nofollow">trivial example</a>.

Edit: Link is dead. You can find the source tree copy <a href="https://android.googlesource.com/platform/dalvik/+/master/docs/hello-world.html" rel="nofollow">here</a>, and a formatted version in a mirror <a href="http://milk.com/kodebase/dalvik-docs-mirror/docs/hello-world.html" rel="nofollow">here</a>.

blocks|key|1325042|text|对于ANT自动构建：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1325043|+<property+name="dx"+value="${android_sdk}/build_tools/18.1.0/dx"+/>
+<target+name="convert_jar_to_dex">
++++<apply+executable="${dx}"+failonerror="true"+parallel="true">+++
++++++++++++<arg+value="-JXms1024m"+/>++
++++++++++++<arg+value="-JXss1024k"+/>++
++++++++++++<arg+value="--dex"+/>+++
++++++++++++<arg+value="--verbose"+/>+++
++++++++++++<arg+value="--no-strict"+/>+
++++++++++++<arg+value="--num-threads=4"+/>+
++++++++++++<arg+value="--output=${basedir}/bin/output.dex"+/>++
++++++++++++<fileset+file="${basedir}/input.jar"/>++
++++</apply>
+</target>|code-block|syntax|javascript|1325044|这是我的经验。希望它能有所帮助。|1325045|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|$]]

For ANT automatic building:

<pre><code> &lt;property name="dx" value="${android_sdk}/build_tools/18.1.0/dx" /&gt;
 &lt;target name="convert_jar_to_dex"&gt;
 &lt;apply executable="${dx}" failonerror="true" parallel="true"&gt; 
 &lt;arg value="-JXms1024m" /&gt; 
 &lt;arg value="-JXss1024k" /&gt; 
 &lt;arg value="--dex" /&gt; 
 &lt;arg value="--verbose" /&gt; 
 &lt;arg value="--no-strict" /&gt; 
 &lt;arg value="--num-threads=4" /&gt; 
 &lt;arg value="--output=${basedir}/bin/output.dex" /&gt; 
 &lt;fileset file="${basedir}/input.jar"/&gt; 
 &lt;/apply&gt;
 &lt;/target&gt;
</code></pre>

This is my experience. May it be helpful.

blocks|key|5022416|text|为darutk答案添加更多信息：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5022417|Android+SDK中包含dx命令|5022418|示例:+D:\Android\AndroidSDK\build-tools\23.0.1\|5022419|其中23.0.1是android版本|5022420|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

adding more info for darutk answer:
 dx command is contained in Android SDK
 example: D:\Android\AndroidSDK\build-tools\23.0.1\
 with 23.0.1 is android version

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