Add Fimber module, Log class

lib/base/debug_utils.dart

@@ -0,0 +1,28 @@
+import 'package:fimber/fimber.dart';
+import 'package:flutter/foundation.dart';
+
+class Log {
+  static initialize() {
+    if (!kReleaseMode) {
+      Fimber.plantTree(DebugTree());
+    }
+  }
+
+  static d(String tag, String message, {dynamic ex}) {
+    if (!kReleaseMode) {
+      Fimber.log("D", message, tag: tag, ex: ex);
+    }
+  }
+
+  static w(String tag, String message, {dynamic ex}) {
+    if (!kReleaseMode) {
+      Fimber.log("W", message, tag: tag, ex: ex);
+    }
+  }
+
+  static e(String tag, String message, {dynamic ex}) {
+    if (!kReleaseMode) {
+      Fimber.log("E", message, tag: tag, ex: ex);
+    }
+  }
+}

lib/main.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 
+import 'base/debug_utils.dart';
 import 'generated/i18n.dart';
 import 'settings.dart';
 
@@ -36,6 +37,9 @@ class _MyHomePageState extends State<MyHomePage> {
     if (_counter == null) {
       return;
     }
+
+    Log.d("main", "floating button pressed: counter = $_counter");
+
     setState(() {
       // This call to setState tells the Flutter framework that something has
       // changed in this State, which causes it to rerun the build method below

lib/myapp.dart

@@ -1,13 +1,18 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_localizations/flutter_localizations.dart';
 
+import 'base/debug_utils.dart';
 import 'generated/i18n.dart';
 import 'main.dart';
 
 void main() => runApp(MyApp());
 
 class MyApp extends StatelessWidget {
   // This widget is the root of your application.
+  MyApp() {
+    Log.initialize();
+  }
+
   @override
   Widget build(BuildContext context) {
     return MaterialApp(

pubspec.yaml

@@ -33,6 +33,9 @@ dependencies:
   path:
   synchronized:
 
+  # logging
+  fimber:
+
 dev_dependencies:
   flutter_test:
     sdk: flutter