Android Volley解析之表单提交篇
Posted Android移动开发者
tags:
篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了Android Volley解析之表单提交篇相关的知识，希望对你有一定的参考价值。
博客源址：http://blog.csdn.net/jxxfzgy/article/details/44044947
上一篇文章中，讲了 Volley 的 get 和 post 请求，并且对 volley 的基本使用和基本分析做了讲解，而这篇 blog 将讲解用 volley 实现表单的提交，在看这篇文章之前，如果对 Volley 基本知识不够了解的朋友，可以移驾前往Android Volley解析（一）之GET、POST请求篇
表单提交的数据格式
要实现表单的提交，就要知道表单提交的数据格式是怎么样，这里我从某知名网站抓了一条数据，先来分析别人提交表单的数据格式。
数据包：
<code class="hljs http has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-attribute" style="box-sizing: border-box;">Connection</span>: <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">keep-alive</span> <span class="hljs-attribute" style="box-sizing: border-box;">Content-Length</span>: <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">123</span> <span class="hljs-attribute" style="box-sizing: border-box;">X-Requested-With</span>: <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">ShockwaveFlash/16.0.0.296</span> <span class="hljs-attribute" style="box-sizing: border-box;">User-Agent</span>: <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (Khtml, like Gecko) Chrome/40.0.2214.93 Safari/537.36</span> <span class="hljs-attribute" style="box-sizing: border-box;">Content-Type</span>: <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">multipart/form-data; boundary=----------Ij5ei4KM7KM7ae0KM7cH2ae0Ij5Ef1</span> <span class="hljs-attribute" style="box-sizing: border-box;">Accept</span>: <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">*/*</span> <span class="hljs-attribute" style="box-sizing: border-box;">Accept-Encoding</span>: <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">gzip, deflate</span> <span class="hljs-attribute" style="box-sizing: border-box;">Accept-Language</span>: <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">zh-CN,zh;q=0.8</span> <span class="hljs-attribute" style="box-sizing: border-box;">Cookie</span>: <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">bdshare_firstime=1409052493497</span> <span class="haskell" style="box-sizing: border-box;"><span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">------------Ij5ei4KM7KM7ae0KM7cH2ae0Ij5Ef1</span> <span class="hljs-type" style="box-sizing: border-box; color: rgb(102, 0, 102);">Content</span>-<span class="hljs-type" style="box-sizing: border-box; color: rgb(102, 0, 102);">Disposition</span>: form-<span class="hljs-typedef" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">data</span>; name="position"</span> <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">1425264476444</span> <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">------------Ij5ei4KM7KM7ae0KM7cH2ae0Ij5Ef1</span> <span class="hljs-type" style="box-sizing: border-box; color: rgb(102, 0, 102);">Content</span>-<span class="hljs-type" style="box-sizing: border-box; color: rgb(102, 0, 102);">Disposition</span>: form-<span class="hljs-typedef" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">data</span>; name="editorIndex"</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">ue_con_1425264252856</span> <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">------------Ij5ei4KM7KM7ae0KM7cH2ae0Ij5Ef1</span> <span class="hljs-type" style="box-sizing: border-box; color: rgb(102, 0, 102);">Content</span>-<span class="hljs-type" style="box-sizing: border-box; color: rgb(102, 0, 102);">Disposition</span>: form-<span class="hljs-typedef" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">data</span>; name="cm"</span> <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">100672</span> <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">------------Ij5ei4KM7KM7ae0KM7cH2ae0Ij5Ef1--</span></span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li><li style="box-sizing: border-box; padding: 0px 5px;">16</li><li style="box-sizing: border-box; padding: 0px 5px;">17</li><li style="box-sizing: border-box; padding: 0px 5px;">18</li><li style="box-sizing: border-box; padding: 0px 5px;">19</li><li style="box-sizing: border-box; padding: 0px 5px;">20</li><li style="box-sizing: border-box; padding: 0px 5px;">21</li><li style="box-sizing: border-box; padding: 0px 5px;">22</li><li style="box-sizing: border-box; padding: 0px 5px;">23</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li><li style="box-sizing: border-box; padding: 0px 5px;">16</li><li style="box-sizing: border-box; padding: 0px 5px;">17</li><li style="box-sizing: border-box; padding: 0px 5px;">18</li><li style="box-sizing: border-box; padding: 0px 5px;">19</li><li style="box-sizing: border-box; padding: 0px 5px;">20</li><li style="box-sizing: border-box; padding: 0px 5px;">21</li><li style="box-sizing: border-box; padding: 0px 5px;">22</li><li style="box-sizing: border-box; padding: 0px 5px;">23</li></ul>
看到上面的数据包，我们不需要全部分析，我们主要关心的是数据如何封装，因为http请求头，在网络请求中已经为我们封装好了；可以看到这里总共是提交了三条数据，每一条数据的格式都是一样的，所以我们只需要分析一条数据即可，这里拿最后一条数据来说，因为在所有的数据之后还有一个结尾的标志。
<code class="hljs haskell has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">------------Ij5ei4KM7KM7ae0KM7cH2ae0Ij5Ef1</span> <span class="hljs-type" style="box-sizing: border-box; color: rgb(102, 0, 102);">Content</span>-<span class="hljs-type" style="box-sizing: border-box; color: rgb(102, 0, 102);">Disposition</span>: form-<span class="hljs-typedef" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">data</span>; name="cm"</span> <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">100672</span> <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">------------Ij5ei4KM7KM7ae0KM7cH2ae0Ij5Ef1--</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li></ul>
这条数据一共有四行组成，加上结尾标志共有五行
1、第一行：
<code class="hljs mel has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"--"</span> + <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">boundary</span> + <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"\\r\\n"</span> ;</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>
说明：”–”为数据开始标志，boundary为http实体头定义的边界分割线，boundary可以是任意的字符串，只要和Content-Type: multipart/form-data; boundary=———-Ij5ei4KM7KM7ae0KM7cH2ae0Ij5Ef1中保持一直即可，”\\r\\n”为回车换行；
2、第二行：
<code class="hljs bash has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"Content-Disposition: form-data; name="</span>参数的名称<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">""</span> + <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"\\r\\n"</span> ;</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>
说明：Content-Disposition表示上传的内容特性，form-data上传内容特性为表单的形式；
3、第三行：
<code class="hljs lisp has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"\\r\\n"</span> <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>
4、说明：这是一个空行，只有一个回车换行 ；
第四行：
<code class="hljs bash has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"参数的值"</span> + <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"\\r\\n"</span> ;</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>
说明：每个参数都是由一个key和value组成，而这一行就是value跟回车换行符
结尾行：
<code class="hljs mel has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"--"</span> + <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">boundary</span> + <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"--"</span> + <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"\\r\\n"</span> ;</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>
说明：在所有的数据结束之后，需要有这个结尾标志。
如果有多个参数，则重复1、2、3、4，直至最后一个参数的最后加上结尾行。
参数实体类
这里对参数做一个封装，因为往往提交表单的时候，都需要提交多个参数
<code class="hljs java has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-javadoc" style="color: rgb(136, 0, 0); box-sizing: border-box;">/**
* Created by gyzhong on 15/3/2.
*/</span>
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">/*表单提交的参数*/</span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">class</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">FormText</span> {</span>
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">/*参数的名称*/</span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> String mName ;
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">/*参数的值*/</span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> String mValue ;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-title" style="box-sizing: border-box;">FormText</span>(String mName, String mValue) {
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">this</span>.mName = mName;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">this</span>.mValue = mValue;
}
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> String <span class="hljs-title" style="box-sizing: border-box;">getName</span>() {
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> mName;
}
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> String <span class="hljs-title" style="box-sizing: border-box;">getValue</span>() {
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> mValue;
}
}</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li><li style="box-sizing: border-box; padding: 0px 5px;">16</li><li style="box-sizing: border-box; padding: 0px 5px;">17</li><li style="box-sizing: border-box; padding: 0px 5px;">18</li><li style="box-sizing: border-box; padding: 0px 5px;">19</li><li style="box-sizing: border-box; padding: 0px 5px;">20</li><li style="box-sizing: border-box; padding: 0px 5px;">21</li><li style="box-sizing: border-box; padding: 0px 5px;">22</li><li style="box-sizing: border-box; padding: 0px 5px;">23</li><li style="box-sizing: border-box; padding: 0px 5px;">24</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li><li style="box-sizing: border-box; padding: 0px 5px;">16</li><li style="box-sizing: border-box; padding: 0px 5px;">17</li><li style="box-sizing: border-box; padding: 0px 5px;">18</li><li style="box-sizing: border-box; padding: 0px 5px;">19</li><li style="box-sizing: border-box; padding: 0px 5px;">20</li><li style="box-sizing: border-box; padding: 0px 5px;">21</li><li style="box-sizing: border-box; padding: 0px 5px;">22</li><li style="box-sizing: border-box; padding: 0px 5px;">23</li><li style="box-sizing: border-box; padding: 0px 5px;">24</li></ul>
Volley 对数据的封装
在上一篇文章中我们讲了如何定制自己的 Request，在这里同样需要用到。在定制 Request 的时候，需要重写获取实体的方法
<code class="hljs java has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">byte</span>[] <span class="hljs-title" style="box-sizing: border-box;">getBody</span>() <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">throws</span> AuthFailureError {}</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>
把参数通过二进制的形式传给服务器，当然就不需要重写获取参数的方法
<code class="hljs java has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">protected</span> Map<String, String> <span class="hljs-title" style="box-sizing: border-box;">getParams</span>() <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">throws</span> AuthFailureError {}</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>
最核心的方法也就在getBody()中，这个方法的实现，如果对表单提交的数据格式很了解，实现起来非常简单，因为这个方法就是把参数拼接成我们所分析的数据格式；
<code class="hljs avrasm has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"> @Override
public byte[] getBody() throws AuthFailureError {
if (mListItem == null||mListItem<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.size</span>() == <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>){
return super<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.getBody</span>() <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span>
}
ByteArrayOutputStream bos = new ByteArrayOutputStream() <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span>
int N = mListItem<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.size</span>() <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span>
FormText formText <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span>
for (int i = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span><span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">; i < N ;i++){</span>
formText = mListItem<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.get</span>(i) <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span>
StringBuffer sb= new StringBuffer() <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span>
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">/*第一行:"--" + boundary + "\\r\\n" ;*/</span>
sb<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.append</span>(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"--"</span>+BOUNDARY)<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span>
sb<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.append</span>(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"\\r\\n"</span>) <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span>
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">/*第二行:"Content-Disposition: form-data; name="参数的名称"" + "\\r\\n" ;*/</span>
sb<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.append</span>(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"Content-Disposition: form-data;"</span>)<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span>
sb<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.append</span>(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"name=\\""</span>)<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span>
sb<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.append</span>(formText<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.getName</span>()) <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span>
sb<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.append</span>(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"\\""</span>) <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span>
sb<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.append</span>(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"\\r\\n"</span>) <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span>
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">/*第三行:"\\r\\n" ;*/</span>
sb<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.append</span>(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"\\r\\n"</span>) <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span>
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">/*第四行:"参数的值" + "\\r\\n" ;*/</span>
sb<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.append</span>(formText<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.getValue</span>()) <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span>
sb<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.append</span>(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"\\r\\n"</span>) <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span>
try {
bos<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.write</span>(sb<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.toString</span>()<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.getBytes</span>(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"utf-8"</span>))<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span>
} catch (IOException e) {
e<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.printStackTrace</span>()<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span>
}
}
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">/*结尾行:"--" + boundary + "--" + "\\r\\n" ;*/</span>
String endLine = <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"--"</span> + BOUNDARY + <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"--"</span>+ <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"\\r\\n"</span> <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span>
try {
bos<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.write</span>(endLine<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.toString</span>()<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.getBytes</span>(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"utf-8"</span>))<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span>
} catch (IOException e) {
e<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.printStackTrace</span>()<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span>
}
Log<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.v</span>(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"zgy"</span>,<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"=====formText====\\n"</span>+bos<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.toString</span>()) <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span>
return bos<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.toByteArray</span>()<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span>
}</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li><li style="box-sizing: border-box; padding: 0px 5px;">16</li><li style="box-sizing: border-box; padding: 0px 5px;">17</li><li style="box-sizing: border-box; padding: 0px 5px;">18</li><li style="box-sizing: border-box; padding: 0px 5px;">19</li><li style="box-sizing: border-box; padding: 0px 5px;">20</li><li style="box-sizing: border-box; padding: 0px 5px;">21</li><li style="box-sizing: border-box; padding: 0px 5px;">22</li><li style="box-sizing: border-box; padding: 0px 5px;">23</li><li style="box-sizing: border-box; padding: 0px 5px;">24</li><li style="box-sizing: border-box; padding: 0px 5px;">25</li><li style="box-sizing: border-box; padding: 0px 5px;">26</li><li style="box-sizing: border-box; padding: 0px 5px;">27</li><li style="box-sizing: border-box; padding: 0px 5px;">28</li><li style="box-sizing: border-box; padding: 0px 5px;">29</li><li style="box-sizing: border-box; padding: 0px 5px;">30</li><li style="box-sizing: border-box; padding: 0px 5px;">31</li><li style="box-sizing: border-box; padding: 0px 5px;">32</li><li style="box-sizing: border-box; padding: 0px 5px;">33</li><li style="box-sizing: border-box; padding: 0px 5px;">34</li><li style="box-sizing: border-box; padding: 0px 5px;">35</li><li style="box-sizing: border-box; padding: 0px 5px;">36</li><li style="box-sizing: border-box; padding: 0px 5px;">37</li><li style="box-sizing: border-box; padding: 0px 5px;">38</li><li style="box-sizing: border-box; padding: 0px 5px;">39</li><li style="box-sizing: border-box; padding: 0px 5px;">40</li><li style="box-sizing: border-box; padding: 0px 5px;">41</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li><li style="box-sizing: border-box; padding: 0px 5px;">16</li><li style="box-sizing: border-box; padding: 0px 5px;">17</li><li style="box-sizing: border-box; padding: 0px 5px;">18</li><li style="box-sizing: border-box; padding: 0px 5px;">19</li><li style="box-sizing: border-box; padding: 0px 5px;">20</li><li style="box-sizing: border-box; padding: 0px 5px;">21</li><li style="box-sizing: border-box; padding: 0px 5px;">22</li><li style="box-sizing: border-box; padding: 0px 5px;">23</li><li style="box-sizing: border-box; padding: 0px 5px;">24</li><li style="box-sizing: border-box; padding: 0px 5px;">25</li><li style="box-sizing: border-box; padding: 0px 5px;">26</li><li style="box-sizing: border-box; padding: 0px 5px;">27</li><li style="box-sizing: border-box; padding: 0px 5px;">28</li><li style="box-sizing: border-box; padding: 0px 5px;">29</li><li style="box-sizing: border-box; padding: 0px 5px;">30</li><li style="box-sizing: border-box; padding: 0px 5px;">31</li><li style="box-sizing: border-box; padding: 0px 5px;">32</li><li style="box-sizing: border-box; padding: 0px 5px;">33</li><li style="box-sizing: border-box; padding: 0px 5px;">34</li><li style="box-sizing: border-box; padding: 0px 5px;">35</li><li style="box-sizing: border-box; padding: 0px 5px;">36</li><li style="box-sizing: border-box; padding: 0px 5px;">37</li><li style="box-sizing: border-box; padding: 0px 5px;">38</li><li style="box-sizing: border-box; padding: 0px 5px;">39</li><li style="box-sizing: border-box; padding: 0px 5px;">40</li><li style="box-sizing: border-box; padding: 0px 5px;">41</li></ul>
可以看到，这个方法的实现，就是对数据按照我们所分析的格式组装。
在 Request 中还有一个关键的地方，需要在 http 头部中声明内容类型为表单数据
<code class="hljs haskell has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-type" style="box-sizing: border-box; color: rgb(102, 0, 102);">Content</span>-<span class="hljs-type" style="box-sizing: border-box; color: rgb(102, 0, 102);">Type</span>: multipart/form-<span class="hljs-typedef" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">data</span>; boundary=<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">----------8888888888888</span></span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: rig以上是关于Android Volley解析之表单提交篇的主要内容，如果未能解决你的问题，请参考以下文章