Android知识点——Log日志输出显示不完整以及GsonFormat

本文主要是介绍Android知识点——Log日志输出显示不完整以及GsonFormat，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

先扯两句

这部分内容原本是想写成一个附录的，不过细想起来，这两部分内容在开发中还是很好用的偷懒手段，这里也就单独开了一篇博客。
还是先上我的Git库，然后开始正文。
MyBaseApplication (https://github.com/BanShouWeng/MyBaseApplication)
并给大家展示个神器，叫Android知识点——目录，好了，闲言少叙，下面进入正题。

正文

Log日志输出显示不完整

不知道大家在开发过程中有没有遇到过这种尴尬，那就是我们想要看打印日志信息的时候，命名日志信息全都得到了，可是当我们在Android Monitor中查看的时候，却在关键的地方戛然而止，那种感觉别提多难受了，如果不是和谐社会，真想把开发AS的找来狠狠的揍一顿。
不过转念一想，能不能打得过对方暂且不论，有找他当前在那的时间成本，我还不如想想怎么解决当前的问题，不然领导老板想揍我可不用费力找，为了那么点工资，我还真不敢还手。
功夫不负有心人，终于找到了天才哆啦梦在这篇解决AndroidStudio的logcat显示超长字符串的问题，看到人家名字起得这么专业，我这小心脏又被狠狠的暴击了一下，下面是天才哆啦梦的分析：

问题描述： 使用Log打印服务器返回的json数据时，有时候数据过长，在AndroidStudio的logcat只显示了一部分。没有完整的json体，首先最尴尬的是没法使用AndroidStudio的插件一键生成对应的数据实体了，哈哈。为了使用插件“偷懒”，我目标把数据源全部打印在logcat上。
解决思路： 首先，要知道LogCat中的每次打印的message是有上限的，原来logcat在实现上对于message的内存分配大概是4k左右.所以超过的内容都直接被丢弃了。这就是我们使用Log打印长json字符串，结果不完整的原因。我写一个工具类，用递归的思想处理这个问题。

代码部分，我做了一定的修改，显示的长度写死成最大值“3999”至于为什么没用4000，天才哆啦梦博客中说不行，我就没尝试，毕竟这部分无关大雅，其后就是参数的顺序，tag在前，显示的logContent在后，毕竟原本log的顺序就是这样，这个顺序也舒服一些。当然，这所谓的修改与没修改差别也不大，就是一个习惯的调整罢了。

    private static boolean debug = true;private static int showLength = 3999;/*** 分段打印出较长log文本** @param logContent 打印文本* @param tag        打印log的标记*/public static void info(String tag, String logContent) {if (!debug) {return;}if (logContent.length() > showLength) {String show = logContent.substring(0, showLength);i(tag, show);/*剩余的字符串如果大于规定显示的长度，截取剩余字符串进行递归，否则打印结果*/if ((logContent.length() - showLength) > showLength) {String partLog = logContent.substring(showLength, logContent.length());info(tag, partLog);} else {String printLog = logContent.substring(showLength, logContent.length());i(tag, printLog);}} else {e(tag, logContent);}}

这里我贴出的代码是i的，也就是information，当然也可以再封装一个error的，这部分也视个人习惯而定。其中的debug参数是为了方便日志管理，只需要在这里做一下修改，就可以控制全局日志的输出与否，避免发布的时候，个别日志没有关闭，导致信息泄漏。

//网络访问代码
@Override
public void onNext(@NonNull ResponseBody responseBody) {try {String responseString = responseBody.string();Log.i("responseString", responseString);LogUtil.info("response", responseString);} catch (IOException e) {e.printStackTrace();}
}

修改前后的日志对比

//修改前
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GsonFormat

打印日志在开发过程中自然是必不可少的环节，可是即便如此，上面的日志部分也不应该放这么多的日志，随便找个例子不就好了吗？
可如果大家细心一些就会发现，上面打印出来的日志是json串，而我们在使用json的时候，习惯性网络访问结束后便用gson或者FastJson将json转换为bean对象（bean不理解的可以参见我的博客《一个Android工程的从零开始》-1前期准备），这个是大家都知道的常识了，可是这个bean的创建却是痛苦异常的过程，需要分析整个json的层次机构，还要考虑创建参数的数据类型，小的json还好说，可是上面这一坨，我是有一种要打人的冲动。
所以铺垫了这么多，终于轮到我们的GsonFormat 登场了，插件的集成过程可以参见我的博客ButterKnife以及Android ButterKnife Zelezny中Android ButterKnife Zelezny插件的集成过程。
插件集成成功之后，我们就可以好好玩玩了，首先，我们需要将之前截取成一段一段的json拼接到一起，然后alt + insert快捷键，在菜单栏中选择GsonFormat，在弹出的对话框中输入前面拼接好的json串，可以格式化查看，也可以直接点击ok，随后让我们看看有没有需要修改的数据类型，基本不需要修改，再次点击ok等待片刻就能生成我们所需要的bean对象。

附录

《一个Android工程的从零开始》- 目录

这篇关于Android知识点——Log日志输出显示不完整以及GsonFormat的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！

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