How to have a callback for when a crash occurred, while using Crashlytics SDK?

Question

Background

We use Crashlytics SDK to manage app crashes and get needed information about them.

So far, the information that the SDK automatically gathered was

Answer 1

Try creating an UncaughtExceptionHandler and use Custom Key(s) to store the information you want to be associated with your crash report.

1. Create your custom UncaughtExceptionHandler (ensuring that it will pass exception to default UncaughtExceptionHandler to be handled later via Crashlytics).

2. In the uncaughtException method add custom logic to set your key e.g. Crashlytics.setString("available_memory", "5784");

3. Check your Crashlytics dashboard to view your custom key(s) when your app crashes

Create a custom Application subclass to hold your logic:

public class MyApplication extends Application {
   private static Thread.UncaughtExceptionHandler mDefaultUncaughtExceptionHandler;

   private static Thread.UncaughtExceptionHandler mCaughtExceptionHandler = new Thread.UncaughtExceptionHandler() {
       @Override
       public void uncaughtException(Thread thread, Throwable ex) {
          // Custom logic goes here
          // Calculate available memory
          Crashlytics.setString("available_memory", "5784");
          // This will make Crashlytics do its job
          mDefaultUncaughtExceptionHandler.uncaughtException(thread, ex);
       }
   };

   @Override
   public void onCreate() {
     super.onCreate();

     // Order is important!
     // First, start Crashlytics
     Crashlytics.start(this);

     // Second, cache a reference to default uncaught exception handler
     mDefaultUncaughtExceptionHandler = Thread.getDefaultUncaughtExceptionHandler();
     // Third, set custom UncaughtExceptionHandler
     Thread.setDefaultUncaughtExceptionHandler(mCaughtExceptionHandler);
   }
}

Remember to specify the name of your Application subclass in your AndroidManifest.xml’s tag