flutter-错误信息收集

话不多说直接上代码：

import 'dart:async';
import 'package:flutter/material.dart';

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: Text('Flutter Crash Capture'),),
        body: MyHomePage(),
      ),
    );
  }
}

class MyHomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    List<String> list = ["a"];
    print(list[10]);
    return Container();
  }
}

Future<Null> main() async {
  FlutterError.onError = (FlutterErrorDetails details) async {
    if (isInDebugMode) {
      FlutterError.dumpErrorToConsole(details);
    } else {
      Zone.current.handleUncaughtError(details.exception, details.stack);
    }
  };

  runZoned<Future<void>>(() async {
    runApp(MyApp());
  },  onError: (error, stackTrace) async {
    await _reportError(error, stackTrace);
  });
}

Future<Null> _reportError(dynamic error, dynamic stackTrace) async {
  // TODO

  // 上传错误信息
 // 可以打印也可以上传服务器
  print(error.toString());
  print(stackTrace.toString());

}

bool get isInDebugMode {
  // Assume you're in production mode.
  bool inDebugMode = false;

  // Assert expressions are only evaluated during development. They are ignored
  // in production. Therefore, this code only sets `inDebugMode` to true
  // in a development environment.
  assert(inDebugMode = true);

  return inDebugMode;
}

运行结果：

flutter: ══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════

flutter: The following RangeError was thrown building MyHomePage(dirty):

flutter: RangeError (index): Invalid value: Only valid value is 0: 10

flutter:

flutter: The relevant error-causing widget was:

flutter: MyHomePage

flutter:

package:firstflutter_project/main.dart:11

flutter:

flutter: When the exception was thrown, this was the stack:

flutter: #0 List.[] (dart:core-patch/growable_array.dart:149:60)

flutter: #1 MyHomePage.build

package:firstflutter_project/main.dart:21

flutter: #2 StatelessElement.build

package:flutter/…/widgets/framework.dart:4291

...
...

flutter: (elided 8 frames from package dart:async and package dart:async-patch)
flutter:
flutter: ════════════════════════════════════════════════════════════════════════════════════════════════════