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flutter_crashlytics

Flutter plugin to enable Crashlytics reporting.

Setup

Firebase Crashlytics

If using Firebase instead of Fabric, you must first setup your app to use firebase as per this tutorial https://codelabs.developers.google.com/codelabs/flutter-firebase/#4

The instructions are the same for Fabric and Firebase, except that for Firebase, you do not get an Api key so you do not have to add it anywhere.

Android

To setup Crashlytics on Android side, you need to set under your manifest the Fabric ID like: (Only do this if using Fabric, not firebase as you will not have an Api Key)

 <meta-data
            android:name="io.fabric.ApiKey"
            android:value="YOUR_ID_HERE" />

You also need to change you build.gradle file like:

buildscript {
    repositories {
        ...
        maven { url 'https://maven.fabric.io/public' }
    }

    dependencies {
        classpath 'io.fabric.tools:gradle:1.+'
        ...
    }
}

And apply the fabric plugin apply plugin: 'io.fabric'

Nothing more.

iOS

On iOS side your need to set your Fabric ID under your Info.plist like: (Only do this if using Fabric, not firebase as you will not have an Api Key)

<key>Fabric</key>
    <dict>
        <key>APIKey</key>
        <string>YOUR_ID_HERE</string>
        <key>Kits</key>
        <array>
            <dict>
                <key>KitInfo</key>
                <dict/>
                <key>KitName</key>
                <string>Crashlytics</string>
            </dict>
        </array>
    </dict>

Then on your Podfile add use_frameworks!

Don't forget to add your Run Script step (with any version of Xcode) on the build phases tab and, if using Xcode 10, only then must you add your app's built Info.plist location to the Build Phase's Input Files field:

$(BUILT_PRODUCTS_DIR)/$(INFOPLIST_PATH)

ios run script

That's it :)

Flutter

All you need to do under your code is to let the plugin handle the Flutter crashes.

Your main method should look like:

void main() {
  bool isInDebugMode = false;

  FlutterError.onError = (FlutterErrorDetails details) {
    if (isInDebugMode) {
      // In development mode simply print to console.
      FlutterError.dumpErrorToConsole(details);
    } else {
      // In production mode report to the application zone to report to
      // Crashlytics.
      Zone.current.handleUncaughtError(details.exception, details.stack);
    }
  };

  runZoned<Future<Null>>(() async {
    runApp(MyApp());
  }, onError: (error, stackTrace) async {
    // Whenever an error occurs, call the `reportCrash` function. This will send
    // Dart errors to our dev console or Crashlytics depending on the environment.
    await FlutterCrashlytics().reportCrash(error, stackTrace, forceCrash: false);
  });
}

forceCrash allow you to have a real crash instead of the red screen, in that case the exception will tagged as fatal

API available

  • Add log to crash reporting with log(String msg, {int priority, String tag})
  • Add manual log to crash reporting with logException(Error/Exception exception, Stacktrace stack)
  • Add user info to crash reporting with setUserInfo(String identifier, String email, String name)
  • Add general info to crash reporting with setInfo(String key, dyncamic value)

Limitation

This plugin uses Crashlytics sdk to log manually dart crashes, all manual logged crashes are tagged as non fatal under Crashlytics, that's a limitation of the SDK.

You can bypass that limitation with the forceCrash parameter, instead of the red screen an actual crash will append, the crash will be tagged as Fatal.

On iOS fatal crash has there dart stacktrace under the Logs tab of Crashlytics, that's a limitation of iOS that prevent developers to set a custom stacktrace to an exception.

Contribution

We love contributions! Don't hesitate to open issues and make pull request to help improve this plugin

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📦 Flutter plugin for Crashlytics integration

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