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  • flutter日志

    解决Flutter日志过长导致输出不完整问题-LogUtil

    https://blog.csdn.net/zylvip/article/details/102608256

    输出一个完整的Json

    void main() {
          print("""{"code":200,"msg":"OK","timestamp":0,"data":[{"cover":"","sub_title":"","listen_num":0,"report":"","id":23644,"title":"","type":10002,"jump_info":{"mid":"","id":0,"url":"000kD0DI1EXpLO"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1788145.jpg","urlex1":""}},{"cover":"","sub_title":"","listen_num":0,"report":"","id":23601,"title":"","type":3002,"jump_info":{"mid":"","id":0,"url":"https://y.qq.com/m/digitalbum/gold/index.html?openinqqmusic=1&_video=true&mid=000XEFal22lEwn&g_f=yqqjiaodian"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1781138.jpg","urlex1":""}},{"cover":"","sub_title":"","listen_num":0,"report":"","id":23646,"title":"","type":10002,"jump_info":{"mid":"","id":0,"url":"
    003XxGq831zlQv"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1788739.jpg","urlex1":""}},{"cover":"","sub_title":"","listen_num":0,"report":"","id":23554,"title":"","type":3002,"jump_info":{"mid":"","id":0,"url":"https://y.qq.com/m/digitalbum/gold/index.html?openinqqmusic=1&_video=true&mid=000H3CIo2BRJCl&g_f=yqqjiaodian"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1781158.jpg","urlex1":""}},{"cover":"","sub_title":"","listen_num":0,"report":"","id":23648,"title":"","type":10002,"jump_info":{"mid":"","id":0,"url":"003VJ4rz4FltZy"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1788440.jpg","urlex1":""}},{"cover":"","sub_title":"","listen_num":0,"report":"","
    id":23636,"title":"","type":10002,"jump_info":{"mid":"","id":0,"url":"003BVXph3haZPj"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1783665.jpg","urlex1":""}},{"cover":"","sub_title":"","listen_num":0,"report":"","id":23619,"title":"","type":10002,"jump_info":{"mid":"","id":0,"url":"000iCavD0beBPq"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1784125.jpg","urlex1":""}},{"cover":"","sub_title":"","listen_num":0,"report":"","id":23629,"title":"","type":10002,"jump_info":{"mid":"","id":0,"url":"003HbRAe4Y8qqG"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1786011.jpg","urlex1":""}},{"cover":"","sub_title":"","listen_num":0,"report":"","id":23617,"title":"","t
    ype":10002,"jump_info":{"mid":"","id":0,"url":"000W8zPv1woZcd"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1780111.jpg","urlex1":""}}]}""");
    }
    
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    执行结果 - 缺斤少两

    I/flutter (25292): {"code":200,"msg":"OK","timestamp":0,"data":[{"cover":"","sub_title":"","listen_num":0,"report":"","id":23644,"title":"","type":10002,"jump_info":{"mid":"","id":0,"url":"000kD0DI1EXpLO"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1788145.jpg","urlex1":""}},{"cover":"","sub_title":"","listen_num":0,"report":"","id":23601,"title":"","type":3002,"jump_info":{"mid":"","id":0,"url":"https://y.qq.com/m/digitalbum/gold/index.html?openinqqmusic=1&_video=true&mid=000XEFal22lEwn&g_f=yqqjiaodian"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1781138.jpg","urlex1":""}},{"cover":"","sub_title":"","listen_num":0,"report":"","id":23646,"title":"","type":10002,"jump_info":{"mid":"","id":0,"url":"
    I/flutter (25292): 003XxGq831zlQv"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1788739.jpg","urlex1":""}},{"cover":"","sub_title":"","listen_num":0,"report":"","id":23554,"title":"","type":3002,"jump_info":{"mid":
    
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    可以看到当输出到jump_info":{“mid”:就停止了.并没有完整的打印出整个json.

    因为调试时可能用到该数据,但是因为日志打印不全.需要打断点拿该数据.
    大概是从900Char后就不输出了.故此按指定limit长度,对日志信息进行分段打印.LogUtil就产生了.

    使用LogUtil

    void main() {
          LogUtil.d("""{"code":200,"msg":"OK","timestamp":0,"data":[{"cover":"","sub_title":"","listen_num":0,"report":"","id":23644,"title":"","type":10002,"jump_info":{"mid":"","id":0,"url":"000kD0DI1EXpLO"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1788145.jpg","urlex1":""}},{"cover":"","sub_title":"","listen_num":0,"report":"","id":23601,"title":"","type":3002,"jump_info":{"mid":"","id":0,"url":"https://y.qq.com/m/digitalbum/gold/index.html?openinqqmusic=1&_video=true&mid=000XEFal22lEwn&g_f=yqqjiaodian"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1781138.jpg","urlex1":""}},{"cover":"","sub_title":"","listen_num":0,"report":"","id":23646,"title":"","type":10002,"jump_info":{"mid":"","id":0,"url":"
    003XxGq831zlQv"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1788739.jpg","urlex1":""}},{"cover":"","sub_title":"","listen_num":0,"report":"","id":23554,"title":"","type":3002,"jump_info":{"mid":"","id":0,"url":"https://y.qq.com/m/digitalbum/gold/index.html?openinqqmusic=1&_video=true&mid=000H3CIo2BRJCl&g_f=yqqjiaodian"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1781158.jpg","urlex1":""}},{"cover":"","sub_title":"","listen_num":0,"report":"","id":23648,"title":"","type":10002,"jump_info":{"mid":"","id":0,"url":"003VJ4rz4FltZy"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1788440.jpg","urlex1":""}},{"cover":"","sub_title":"","listen_num":0,"report":"","
    id":23636,"title":"","type":10002,"jump_info":{"mid":"","id":0,"url":"003BVXph3haZPj"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1783665.jpg","urlex1":""}},{"cover":"","sub_title":"","listen_num":0,"report":"","id":23619,"title":"","type":10002,"jump_info":{"mid":"","id":0,"url":"000iCavD0beBPq"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1784125.jpg","urlex1":""}},{"cover":"","sub_title":"","listen_num":0,"report":"","id":23629,"title":"","type":10002,"jump_info":{"mid":"","id":0,"url":"003HbRAe4Y8qqG"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1786011.jpg","urlex1":""}},{"cover":"","sub_title":"","listen_num":0,"report":"","id":23617,"title":"","t
    ype":10002,"jump_info":{"mid":"","id":0,"url":"000W8zPv1woZcd"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1780111.jpg","urlex1":""}}]}""");
    }
    
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    执行结果 - 分毫不差

    I/flutter (25762): =========Yl-Log=========
    I/flutter (25762): 
    I/flutter (25762): {"code":200,"msg":"OK","timestamp":0,"data":[{"cover":"","sub_title":"","listen_num":0,"report":"","id":23644,"title":"","type":10002,"jump_info":{"mid":"","id":0,"url":"000kD0DI1EXpLO"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1788145.jpg","urlex1":""}},{"cover":"","sub_title":"","listen_num":0,"report":"","id":23601,"title":"","type":3002,"jump_info":{"mid":"","id":0,"url":"https://y.qq.com/m/digitalbum/gold/index.html?openinqqmusic=1&_video=true&mid=000XEFal22lEwn&g_f=yqqjiaodian"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1781138.jpg","urlex1":""}},{"cover":"","sub_title":"","listen_num":0,"report":"","id":23646,"title":"","type":10002,"jump_info":{"mid":"","id":0,"url":"
    I/flutter (25762): 003XxGq831zlQv"},"p
    I/flutter (25762): ic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1788739.jpg","urlex1":""}},{"cover":"","sub_title":"","listen_num":0,"report":"","id":23554,"title":"","type":3002,"jump_info":{"mid":"","id":0,"url":"https://y.qq.com/m/digitalbum/gold/index.html?openinqqmusic=1&_video=true&mid=000H3CIo2BRJCl&g_f=yqqjiaodian"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1781158.jpg","urlex1":""}},{"cover":"","sub_title":"","listen_num":0,"report":"","id":23648,"title":"","type":10002,"jump_info":{"mid":"","id":0,"url":"003VJ4rz4FltZy"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1788440.jpg","urlex1":""}},{"cover":"","sub_title":"","listen_num":0,"report":"","
    I/flutter (25762): id":23636,"title":
    I/flutter (25762): "","type":10002,"jump_info":{"mid":"","id":0,"url":"003BVXph3haZPj"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1783665.jpg","urlex1":""}},{"cover":"","sub_title":"","listen_num":0,"report":"","id":23619,"title":"","type":10002,"jump_info":{"mid":"","id":0,"url":"000iCavD0beBPq"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1784125.jpg","urlex1":""}},{"cover":"","sub_title":"","listen_num":0,"report":"","id":23629,"title":"","type":10002,"jump_info":{"mid":"","id":0,"url":"003HbRAe4Y8qqG"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1786011.jpg","urlex1":""}},{"cover":"","sub_title":"","listen_num":0,"report":"","id":23617,"title":"","t
    I/flutter (25762): ype":10002,"jump_
    I/flutter (25762): info":{"mid":"","id":0,"url":"000W8zPv1woZcd"},"pic_info":{"urlex2":"","mid":"","url":"http://y.gtimg.cn/music/common/upload/MUSIC_FOCUS/1780111.jpg","urlex1":""}}]}
    I/flutter (25762): 
    I/flutter (25762): =====================
    
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    LogUtil

    Api

    	///是否在生产环境
    	///const bool isDebug = !const bool.fromEnvironment("dart.vm.product");
    
    	//参数可选 isDebug默认true limitLength默认800
    	LogUtil.init(title: "来自LogUtil", isDebug: isDebug,limitLength:800);
    	
    	var log = "我是日志";
    	//仅在Debug时打印
    	LogUtil.d(log);
    	LogUtil.d("我是日志");
    	
    	//在所有环境中打印
    	LogUtil.v(log);
    	LogUtil.v("我是日志");
    
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    LogUtil源码 log_util

    import 'package:flutter/cupertino.dart';
    
    class LogUtil {
      static var _separator = "=";
      static var _split =
          "$_separator$_separator$_separator$_separator$_separator$_separator$_separator$_separator$_separator";
      static var _title = "Yl-Log";
      static var _isDebug = true;
      static int _limitLength = 800;
      static String _startLine = "$_split$_title$_split";
      static String _endLine = "$_split$_separator$_separator$_separator$_split";
    
      static void init({String title, @required bool isDebug,int limitLength}) {
        _title = title;
        _isDebug = isDebug;
        _limitLength = limitLength??=_limitLength;
        _startLine = "$_split$_title$_split";
        var endLineStr = StringBuffer();
        var cnCharReg = RegExp("[u4e00-u9fa5]");
        for (int i = 0; i < _startLine.length; i++) {
          if (cnCharReg.stringMatch(_startLine[i]) != null) {
            endLineStr.write(_separator);
          }
          endLineStr.write(_separator);
        }
        _endLine = endLineStr.toString();
      }
    
      //仅Debug模式可见
      static void d(dynamic obj) {
        if (_isDebug) {
          _log(obj.toString());
        }
      }
    
      static void v(dynamic obj) {
        _log(obj.toString());
      }
    
      static void _log(String msg) {
        print("$_startLine");
        _logEmpyLine();
        if(msg.length<_limitLength){
          print(msg);
        }else{
          segmentationLog(msg);
        }
        _logEmpyLine();
        print("$_endLine");
      }
    
      static void segmentationLog(String msg) {
        var outStr = StringBuffer();
        for (var index = 0; index < msg.length; index++) {
          outStr.write(msg[index]);
          if (index % _limitLength == 0 && index!=0) {
            print(outStr);
            outStr.clear();
            var lastIndex = index+1;
            if(msg.length-lastIndex<_limitLength){
              var remainderStr = msg.substring(lastIndex,msg.length);
              print(remainderStr);
              break;
            }
          }
        }
      }
    
      static void _logEmpyLine(){
        print("");
      }
    }
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  • 原文地址:https://www.cnblogs.com/sundaysandroid/p/13563941.html
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