Android - Crashlytics, run code during crash

Question

I had a bad crash case that was caused due to some Asyncs doing stuff in improper order in a SQLite and thing blew up. It took me some time to debug all that and access to the i

Answer 1

It is possible to get control prior to Crashlytics logging a crash. You essentially have to create your own uncaught exception handler and call Crashlytics' handler from there. Something like this in your Application class:

private UncaughtExceptionHandler originalUncaughtHandler;

@Override
public void onCreate() {
    // initialize Fabric with Crashlytics

    originalUncaughtHandler = Thread.getDefaultUncaughtExceptionHandler();
    Thread.setDefaultUncaughtExceptionHandler(this);

    // do the rest of your oncreate stuff
}

@Override
public void uncaughtException(Thread thread, Throwable ex) {
    // do your work to add data to Crashlytics log

    originalUncaughtHandler.uncaughtException(thread, ex);
}