看到别人的一个代码，觉得有点意思，就复制过来。

package robatimport android.util.Log
import java.util.*object LogKit {private val MIN_STACK_OFFSET = 3var defaultTag = "LogKit"private val lineSeparator = System.getProperty("line.separator", "/n")val V = Log.VERBOSEval D = Log.DEBUGval I = Log.INFOval W = Log.WARNval E = Log.ERRORval A = Log.ASSERTprivate val TOP_BORDER = "╔═══════════════════════════════════════════════════════════════════════════════════════════════════"private val LEFT_BORDER = "║ "private val BOTTOM_BORDER = "╚═══════════════════════════════════════════════════════════════════════════════════════════════════"private val MAX_LEN = 1000var open = trueprivate fun processTagAndHead(): String {val elements = Thread.currentThread().stackTraceval offset = getStackOffset(elements)val targetElement = elements[offset]val head = Formatter().format("%s [%s(%s:%d)]","In Thread: " + Thread.currentThread().name,targetElement.methodName,targetElement.fileName,targetElement.lineNumber)return head.toString()}private fun processMsgBody(msg: String, flag: Int, tag: String = defaultTag) {printTop(flag, tag)// 首先打印调用信息printLog(flag, tag)val lineCount = msg.length / MAX_LENif (lineCount == 0) {printLog(flag, tag, msg)} else {var index = 0var i = 0while (true) {printLog(flag, tag, msg.substring(index, index + MAX_LEN))index += MAX_LENif ((++i) >= lineCount)break}}printBottom(flag, tag)}fun getStackOffset(trace: Array<StackTraceElement>): Int {var i = MIN_STACK_OFFSETwhile (i < trace.size) {val e = trace[i]val name = e.classNameif (name != LogKit::class.java.name) {return i}i++}return 2}/* 虽然 kotlin 有默认值这种操作，但是 Log.i(tag,msg) 这种比较符合平时的操作，所以还是提供类似的重载，* 而非 LogUtil.i(msg: String,tag: String = defaultTAG) 这种带默认值参数的方法 */fun v(msg: String) {v(defaultTag, msg)}fun i(msg: String) {i(defaultTag, msg)}fun d(msg: String) {d(defaultTag, msg)}fun w(msg: String) {w(defaultTag, msg)}fun e(msg: String) {e(defaultTag, msg)}fun v(tag: String, msg: String) {if (!open) {return}processMsgBody(msg, V, tag)}fun i(tag: String, msg: String) {if (!open) {return}processMsgBody(msg, I, tag)}fun d(tag: String, msg: String) {if (!open) {return}processMsgBody(msg, D, tag)}fun w(tag: String, msg: String) {if (!open) {return}processMsgBody(msg, W, tag)}fun e(tag: String, msg: String) {if (!open) {return}processMsgBody(msg, E, tag)}fun printLog(flag: Int, tag: String, msg: String = processTagAndHead()) {Log.println(flag, tag, LEFT_BORDER + msg)}fun printBottom(flag: Int, tag: String) {Log.println(flag, tag, BOTTOM_BORDER)}fun printTop(flag: Int, tag: String) {Log.println(flag, tag, TOP_BORDER)}fun closeLog() {this.open = false}}