import 'package:flutter/material.dart';
import 'package:firebase_crashlytics/firebase_crashlytics.dart';
class CrashTest extends StatefulWidget {
  CrashTest({Key key}) : super(key: key);

  _CrashTestState createState() => _CrashTestState();
}

class _CrashTestState extends State<CrashTest> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Crash Test'),
      ),
      body: Center(
          child: Column(
            children: <Widget>[
              FlatButton(
                  child: const Text('Key'),
                  onPressed: () {
                    Crashlytics.instance.setString('foo', 'bar');
                  }),
              FlatButton(
                  child: const Text('Log'),
                  onPressed: () {
                    Crashlytics.instance.log('baz');
                  }),
              FlatButton(
                  child: const Text('Crash'),
                  onPressed: () {
                    // Use Crashlytics to throw an error. Use this for
                    // confirmation that errors are being correctly reported.
                    Crashlytics.instance.crash();
                  }),
              FlatButton(
                  child: const Text('Throw Error'),
                  onPressed: () {
                    // Example of thrown error, it will be caught and sent to
                    // Crashlytics.
                    throw StateError('Uncaught error thrown by app.');
                  }),
              FlatButton(
                  child: const Text('Async out of bounds'),
                  onPressed: () {
                    // Example of an exception that does not get caught
                    // by `FlutterError.onError` but is caught by the `onError` handler of
                    // `runZoned`.
                    Future<void>.delayed(Duration(seconds: 2), () {
                      final List<int> list = <int>[];
                      print(list[100]);
                    });
                  }),
            ],
          ),
        ),
    );
  }
}