最近在擼東西,除錯的時候用Android原生的Log感覺很不爽,打的Log給我一種東倒西歪,凌亂的感覺。於是自己看了一下Blankj大神的Android-Utils庫,看了一下他實現的LogUtils,借鑑了一下,簡單的封裝了一個在Kotlin中可以正確使用的LogUtil。不過話說講道理,有擴充套件,Util這種東西還是可以儘量不用的,但是我有點不清楚Log這玩意該擴充套件給誰呢,Any?所以還是寫了一個LogUtil……
列印效果
最後直接放一下列印Log的樣子,這裡只放出i級別的日誌:
處理了日誌比較長的時候的情況,點選log中藍色的字可以跳轉到程式碼中的相應位置,各位如果感興趣是怎麼實現的,可以直接看我程式碼(當然了,我也是看別人的才知道怎麼去實現,哈哈)。
Blankj大神的LogUtils有一個問題,就是程式碼中獲取程式碼檔案的時候寫死了.java結尾,所以在kotlin以.kt結尾的時候,就無法正確的跳轉到程式碼裡(版本號:1.8.3),當然了,我已經跟Blankj反饋了,在不久的將來應該會修復。
完整程式碼
import android.util.Log
import java.util.*
/**
* Created by xiasuhuei321 on 2017/9/1.
* author:luo
* e-mail:xiasuhuei321@163.com
*/
object LogUtil {
private val MIN_STACK_OFFSET = 3
var defaultTag = "LogUtil"
private val lineSeparator = System.getProperty("line.separator", "/n")
val V = Log.VERBOSE
val D = Log.DEBUG
val I = Log.INFO
val W = Log.WARN
val E = Log.ERROR
val A = Log.ASSERT
private val TOP_BORDER = "╔═══════════════════════════════════════════════════════════════════════════════════════════════════"
private val LEFT_BORDER = "║ "
private val BOTTOM_BORDER = "╚═══════════════════════════════════════════════════════════════════════════════════════════════════"
private val MAX_LEN = 1000
var open = true
private fun processTagAndHead(): String {
val elements = Thread.currentThread().stackTrace
val 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)
// 首先列印呼叫資訊
printLog(flag, tag)
val lineCount = msg.length / MAX_LEN
if (lineCount == 0) {
printLog(flag, tag, msg)
} else {
var index = 0
var i = 0
while (true) {
printLog(flag, tag, msg.substring(index, index + MAX_LEN))
index += MAX_LEN
if ((++i) >= lineCount)
break
}
}
printBottom(flag, tag)
}
fun getStackOffset(trace: Array<StackTraceElement>): Int {
var i = MIN_STACK_OFFSET
while (i < trace.size) {
val e = trace[i]
val name = e.className
if (name != LogUtil::class.java.name) {
return i
}
i++
}
return 2
}
/* 雖然 kotlin 有預設值這種操作,但是 Log.i(tag,msg) 這種比較符合平時的操作,所以還是提供類似的過載,
* 而非 LogUtil.i(msg: String,tag: String = defaultTAG) 這種帶預設值引數的方法 */
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
}
}
複製程式碼