使用kotlin开发常用工具类

1.包装LogUtils(只包装了e级别和v级别),

object LogUtils {
    val isDebug: Boolean = true

    /**
     *包装log.e日志
     */
    fun e(tag: String, msg: String) {
        if(isDebug){
            Log.e(tag,msg)
        }
    }

    /**
     * v类型的log.v日志
     */
    fun v(tag: String, msg: String){
        if(isDebug){
            Log.v(tag,msg)
        }
    }
}

2.MD5Utils加密工具类

object MD5Utils {
    final fun  MD5(s:String):String {
        var md5 : MessageDigest
        try {
            md5 = MessageDigest.getInstance("MD5")
        } catch (e: NoSuchAlgorithmException) {
            e.printStackTrace()
            return ""
        }
        val byteArray: ByteArray

        try {
            byteArray = s.toByteArray(charset("UTF-8"))
            val md5Bytes = md5.digest(byteArray)
            val hexValue = StringBuffer()
            for (i in md5Bytes.indices) {
                val `val` = md5Bytes[i].toInt() and 0xff
                if (`val` < 16) {
                    hexValue.append("0")
                }
                hexValue.append(Integer.toHexString(`val`))
            }
            return hexValue.toString()
        } catch (e: UnsupportedEncodingException) {
            // TODO Auto-generated catch block
            e.printStackTrace()
            return ""
        }
    }
}

3.ToastUtils

object ToastUtils {

    private var TOAST: Toast ?=null
    private val Tag = "ToastUtils"

    fun show(context:Context,resourceID:Int){
        show(context, resourceID, Toast.LENGTH_SHORT)
    }


    fun show(context:Context,text:String){
        show(context, text, Toast.LENGTH_SHORT)
    }

    fun show(context:Context,resourceID:Int,duration:Int){
        val text = context.resources.getString(resourceID)
        show(context, text, duration)
    }

    fun show(context:Context,text:String,duration: Int){
        if(TOAST == null){
            TOAST = Toast.makeText(context, text, duration)
        }else{
            TOAST?.setText(text)
        }
        TOAST?.show()
    }


}

4.未完待续