solid_logger

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A professional, lightweight, and extensible logging library for Flutter and Dart that prints structured, readable logs.

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Resources:

Getting Started

Simply import the package and start logging:

import 'package:solid_logger/solid_logger.dart';

void main() {
  SolidLogger.log("solid_logger is working!");
}

You can also pass other objects like List, Map, or Set instead of just strings.

Log Levels

You can log with different levels:

SolidLogger.log("Trace message", tag: "TRACE");
SolidLogger.log("Debug message", tag: "DEBUG");
SolidLogger.log("Info message", tag: "INFO");
SolidLogger.log("Warning message", tag: "WARN");
SolidLogger.log("Error message", tag: "ERROR");

To show only specific log levels, you can set:

SolidLogger.level = LogLevel.warning;

This will hide all TRACE, DEBUG, and INFO messages.

Options

You can configure your logger with custom options:

var logger = SolidLogger(
  printer: PrettyPrinter(
    methodCount: 2,       // Show number of method calls in stack trace
    lineLength: 120,      // Max line length
    colors: true,         // Enable colored output
    printEmojis: true,    // Print emojis for log levels
    dateTimeFormat: DateTimeFormat.onlyTime,
  ),
);

Auto-detecting Colors & Line Length

If you import dart:io as io, you can auto-detect:

var logger = SolidLogger(
  printer: PrettyPrinter(
    colors: io.stdout.supportsAnsiEscapes,
    lineLength: io.stdout.terminalColumns,
  ),
);

Custom Filters

LogFilter decides which log events are shown.

Example:

class MyFilter extends LogFilter {
  @override
  bool shouldLog(LogEvent event) {
    return true; // Show all logs
  }
}

Custom Printers

You can create your own LogPrinter to format log output:

class MyPrinter extends LogPrinter {
  @override
  List<String> log(LogEvent event) {
    return ["[${event.tag}] ${event.message}"];
  }
}

Custom Outputs

LogOutput sends log lines to a destination. Default is ConsoleOutput.

class ConsoleOutput extends LogOutput {
  @override
  void output(OutputEvent event) {
    for (var line in event.lines) {
      print(line);
    }
  }
}

Other outputs could include FileOutput or sending logs to a server.

Acknowledgments

Inspired by logger for Android and maintained by devnizamuddin.

Libraries

solid_logger