关注finddreams，一起分享，一起进步！http://blog.csdn.net/finddreams/article/details/45569089 
　　 
　　在开发中，我们常常用打印log的方式来调试我们的应用。在Java中我们常常使用方法System.out.println()来在控制台打印日志，以便我们的调试。Android中有一个专门的类Log来实现在Android系统下日志的打印，更加方便我们定位程序出现问题的地方。 
　　 
　　但是Android官方提供的Log类在实际项目使用中，也不是非常方便。当程序出现错误时，我们最希望的就是这个Log类能帮我们定位到是哪个类的哪个方法，甚至于是那一行出现了错误。这样就能给我们的调试带来很大的便利。 
　　 
　　同时我们也应该想到为了应用程序的安全起见，在app正式上线之前，我们应该要把打印日志的功能关闭掉，以防别人通过Log来破解你的应用。生产模式的下打印Log，正式模式就把打印日志的功能关闭掉，要做到Log的灵活关闭与打开，也需要在原生的Log类上进行一些封装。 
　　 
　　还有一种时候，当我们的程序出现问题崩溃了，我们希望能够收集到出现异常的原因进行分析，所以可以把Log日志保存到一个文件中，放在SD卡程序创建的目录下。也可以在用户联网的情况下，在程序的后台把出异常的Log日志文件上传到服务端，方便程序员进行分析，解决bug。 
　　 
　　今天就给大家分享一个做项目中很实用的一个Log类LogUtils,这个类是从xUtils中提取出来，稍作修改的，有注释。 
　　 
　　示例： 
　　我们在MainActivity中调用一些LogUtils中的方法，注意看行数。 
　　 
　

　接着看看控制台打印的日志是不是像MainActivity调用的那样，Log中有这个类的名字和oncreate方法名，已及当前行数； 
　 

　　看到上图中的Log日志是不是很方便定位程序中的问题了，出现异常也能快速的定位到。然后把下面的Log类型在程序的任何地方设置为false则不会打印日志，使用起来相当的方便。 
　

<code class="hljs java has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;">　<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 容许打印日志的类型，默认是true，设置为false则不打印</span><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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">boolean</span> allowD = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">true</span>;<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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">boolean</span> allowE = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">true</span>;<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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">boolean</span> allowI = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">true</span>;<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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">boolean</span> allowV = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">true</span>;<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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">boolean</span> allowW = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">true</span>;<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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">boolean</span> allowWtf = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">true</span>;</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); 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;"><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></ul>

代码贴在下面：

<code class="hljs java has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">package</span> com.finddreams.log;<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> java.io.BufferedWriter;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> java.io.File;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> java.io.FileOutputStream;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> java.io.IOException;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> java.io.OutputStreamWriter;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> java.text.SimpleDateFormat;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> java.util.Date;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> java.util.Formatter;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> java.util.Locale;<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.os.Environment;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.text.TextUtils;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.util.Log;<span class="hljs-javadoc" style="color: rgb(136, 0, 0); box-sizing: border-box;">/*** Log工具，类似android.util.Log。 tag自动产生，格式:* customTagPrefix:className.methodName(Line:lineNumber),* customTagPrefix为空时只输出：className.methodName(Line:lineNumber)。* http://blog.csdn.net/finddreams*/</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);">LogUtils</span> {</span><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;">static</span> String customTagPrefix = <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"finddreams"</span>; <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 自定义Tag的前缀，可以是作者名</span><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">final</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">boolean</span> isSaveLog = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">false</span>; <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 是否把保存日志到SD卡中</span><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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">final</span> String ROOT = Environment.getExternalStorageDirectory().getPath() + <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"/finddreams/"</span>; <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// SD卡中的根目录</span><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">final</span> String PATH_LOG_INFO = ROOT + <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"info/"</span>;<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-title" style="box-sizing: border-box;">LogUtils</span>() {}<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 容许打印日志的类型，默认是true，设置为false则不打印</span><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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">boolean</span> allowD = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">true</span>;<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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">boolean</span> allowE = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">true</span>;<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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">boolean</span> allowI = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">true</span>;<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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">boolean</span> allowV = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">true</span>;<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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">boolean</span> allowW = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">true</span>;<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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">boolean</span> allowWtf = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">true</span>;<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> String <span class="hljs-title" style="box-sizing: border-box;">generateTag</span>(StackTraceElement caller) {String tag = <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"%s.%s(Line:%d)"</span>; <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 占位符</span>String callerClazzName = caller.getClassName(); <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 获取到类名</span>callerClazzName = callerClazzName.substring(callerClazzName.lastIndexOf(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"."</span>) + <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">1</span>);tag = String.format(tag, callerClazzName, caller.getMethodName(),caller.getLineNumber()); <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 替换</span>tag = TextUtils.isEmpty(customTagPrefix) ? tag : customTagPrefix + <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">":"</span>+ tag;<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> tag;}<span class="hljs-javadoc" style="color: rgb(136, 0, 0); box-sizing: border-box;">/*** 自定义的logger*/</span><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;">static</span> CustomLogger customLogger;<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;">interface</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">CustomLogger</span> {</span><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> d(String tag, String content);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> d(String tag, String content, Throwable tr);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> e(String tag, String content);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> e(String tag, String content, Throwable tr);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> i(String tag, String content);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> i(String tag, String content, Throwable tr);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> v(String tag, String content);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> v(String tag, String content, Throwable tr);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> w(String tag, String content);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> w(String tag, String content, Throwable tr);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> w(String tag, Throwable tr);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> wtf(String tag, String content);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> wtf(String tag, String content, Throwable tr);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> wtf(String tag, Throwable tr);}<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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">d</span>(String content) {<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (!allowD)<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span>;StackTraceElement caller = getCallerStackTraceElement();String tag = generateTag(caller);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (customLogger != <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>) {customLogger.d(tag, content);} <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">else</span> {Log.d(tag, content);}}<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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">d</span>(String content, Throwable tr) {<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (!allowD)<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span>;StackTraceElement caller = getCallerStackTraceElement();String tag = generateTag(caller);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (customLogger != <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>) {customLogger.d(tag, content, tr);} <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">else</span> {Log.d(tag, content, tr);}}<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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">e</span>(String content) {<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (!allowE)<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span>;StackTraceElement caller = getCallerStackTraceElement();String tag = generateTag(caller);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (customLogger != <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>) {customLogger.e(tag, content);} <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">else</span> {Log.e(tag, content);}<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (isSaveLog) {point(PATH_LOG_INFO, tag, content);}}<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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">e</span>(String content, Throwable tr) {<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (!allowE)<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span>;StackTraceElement caller = getCallerStackTraceElement();String tag = generateTag(caller);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (customLogger != <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>) {customLogger.e(tag, content, tr);} <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">else</span> {Log.e(tag, content, tr);}<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (isSaveLog) {point(PATH_LOG_INFO, tag, tr.getMessage());}}<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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">i</span>(String content) {<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (!allowI)<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span>;StackTraceElement caller = getCallerStackTraceElement();String tag = generateTag(caller);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (customLogger != <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>) {customLogger.i(tag, content);} <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">else</span> {Log.i(tag, content);}}<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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">i</span>(String content, Throwable tr) {<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (!allowI)<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span>;StackTraceElement caller = getCallerStackTraceElement();String tag = generateTag(caller);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (customLogger != <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>) {customLogger.i(tag, content, tr);} <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">else</span> {Log.i(tag, content, tr);}}<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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">v</span>(String content) {<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (!allowV)<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span>;StackTraceElement caller = getCallerStackTraceElement();String tag = generateTag(caller);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (customLogger != <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>) {customLogger.v(tag, content);} <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">else</span> {Log.v(tag, content);}}<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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">v</span>(String content, Throwable tr) {<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (!allowV)<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span>;StackTraceElement caller = getCallerStackTraceElement();String tag = generateTag(caller);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (customLogger != <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>) {customLogger.v(tag, content, tr);} <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">else</span> {Log.v(tag, content, tr);}}<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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">w</span>(String content) {<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (!allowW)<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span>;StackTraceElement caller = getCallerStackTraceElement();String tag = generateTag(caller);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (customLogger != <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>) {customLogger.w(tag, content);} <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">else</span> {Log.w(tag, content);}}<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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">w</span>(String content, Throwable tr) {<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (!allowW)<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span>;StackTraceElement caller = getCallerStackTraceElement();String tag = generateTag(caller);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (customLogger != <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>) {customLogger.w(tag, content, tr);} <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">else</span> {Log.w(tag, content, tr);}}<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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">w</span>(Throwable tr) {<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (!allowW)<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span>;StackTraceElement caller = getCallerStackTraceElement();String tag = generateTag(caller);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (customLogger != <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>) {customLogger.w(tag, tr);} <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">else</span> {Log.w(tag, tr);}}<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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">wtf</span>(String content) {<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (!allowWtf)<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span>;StackTraceElement caller = getCallerStackTraceElement();String tag = generateTag(caller);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (customLogger != <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>) {customLogger.wtf(tag, content);} <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">else</span> {Log.wtf(tag, content);}}<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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">wtf</span>(String content, Throwable tr) {<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (!allowWtf)<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span>;StackTraceElement caller = getCallerStackTraceElement();String tag = generateTag(caller);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (customLogger != <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>) {customLogger.wtf(tag, content, tr);} <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">else</span> {Log.wtf(tag, content, tr);}}<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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">wtf</span>(Throwable tr) {<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (!allowWtf)<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span>;StackTraceElement caller = getCallerStackTraceElement();String tag = generateTag(caller);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (customLogger != <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>) {customLogger.wtf(tag, tr);} <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">else</span> {Log.wtf(tag, tr);}}<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> StackTraceElement <span class="hljs-title" style="box-sizing: border-box;">getCallerStackTraceElement</span>() {<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> Thread.currentThread().getStackTrace()[<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">4</span>];}<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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">point</span>(String path, String tag, String msg) {<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (isSDAva()) {Date date = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> Date();SimpleDateFormat dateFormat = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> SimpleDateFormat(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">""</span>,Locale.SIMPLIFIED_CHINESE);dateFormat.applyPattern(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"yyyy"</span>);path = path + dateFormat.format(date) + <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"/"</span>;dateFormat.applyPattern(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"MM"</span>);path += dateFormat.format(date) + <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"/"</span>;dateFormat.applyPattern(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"dd"</span>);path += dateFormat.format(date) + <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">".log"</span>;dateFormat.applyPattern(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"[yyyy-MM-dd HH:mm:ss]"</span>);String time = dateFormat.format(date);File file = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> File(path);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (!file.exists())createDipPath(path);BufferedWriter out = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>;<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">try</span> {out = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> BufferedWriter(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> OutputStreamWriter(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> FileOutputStream(file, <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">true</span>)));out.write(time + <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">" "</span> + tag + <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">" "</span> + msg + <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"\r\n"</span>);} <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">catch</span> (Exception e) {e.printStackTrace();} <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">finally</span> {<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">try</span> {<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (out != <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>) {out.close();}} <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">catch</span> (IOException e) {e.printStackTrace();}}}}<span class="hljs-javadoc" style="color: rgb(136, 0, 0); box-sizing: border-box;">/*** 根据文件路径 递归创建文件* *<span class="hljs-javadoctag" style="color: rgb(102, 0, 102); box-sizing: border-box;"> @param</span> file*/</span><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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">createDipPath</span>(String file) {String parentFile = file.substring(<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, file.lastIndexOf(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"/"</span>));File file1 = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> File(file);File parent = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> File(parentFile);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (!file1.exists()) {parent.mkdirs();<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">try</span> {file1.createNewFile();} <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">catch</span> (IOException e) {e.printStackTrace();}}}<span class="hljs-javadoc" style="color: rgb(136, 0, 0); box-sizing: border-box;">/*** A little trick to reuse a formatter in the same thread*/</span><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</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);">ReusableFormatter</span> {</span><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> Formatter formatter;<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> StringBuilder builder;<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;">ReusableFormatter</span>() {builder = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> StringBuilder();formatter = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> Formatter(builder);}<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;">format</span>(String msg, Object... args) {formatter.format(msg, args);String s = builder.toString();builder.setLength(<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>);<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> s;}}<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">final</span> ThreadLocal<ReusableFormatter> thread_local_formatter = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> ThreadLocal<ReusableFormatter>() {<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">protected</span> ReusableFormatter <span class="hljs-title" style="box-sizing: border-box;">initialValue</span>() {<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> ReusableFormatter();}};<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;">static</span> String <span class="hljs-title" style="box-sizing: border-box;">format</span>(String msg, Object... args) {ReusableFormatter formatter = thread_local_formatter.get();<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> formatter.format(msg, args);}<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;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">boolean</span> <span class="hljs-title" style="box-sizing: border-box;">isSDAva</span>() {<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)|| Environment.getExternalStorageDirectory().exists()) {<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">true</span>;} <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">else</span> {<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">false</span>;}}}</code>