Android not sending fetch in setNativeExceptionHandler

[smallzZz8]

I am trying to send an error to a webhook on native crashes. Everything works fine on iOS but does not work on android. Does anyone have a solution?

I have confirmed that the setNativeExceptionHandler is running for android since it does print the console log. Any Idea?

setNativeExceptionHandler((errorString) => {
	// You can do something like call an api to report to dev team here
	console.log('setNativeExceptionHandler');
	try {
		const myHeaders = new Headers();
		myHeaders.append('Content-Type', 'application/json');

		const raw = `{"text": "Type: 'setNativeExceptionHandler',\nPlatform: ${
			Platform.OS
		},\nIs Fatal: Yes,\nCan OTA?: No\nError Message: ${errorString.toString().split('"').join("'")}\n-----\n\n"}`;

		const requestOptions = {
			method: 'POST',
			headers: myHeaders,
			body: raw
		};

		fetch('THEURL', requestOptions)
			.then((response) => response.text())
			.then((result) => console.log(result))
			.catch((error) => console.log('error', error));
	} catch (error) {
		console.log(error);
	}
});```

[bombillazo]

I have the same issue, Im trying to send Crashlytics info in the native error handler on the Android app but nothing inside this function runs.

[W1nstar]

Still happening on 2022. Method gets executed in a js thread, logs are shown in logcat but a simple does not work. It doesn't even throw an error to catch, so I'm out of ideas. Of cource, Sentry isn't working either.

@bombillazo did you find any workaround?

[bombillazo]

@W1nstar I think it did, I implemented it like this:

const nativeExceptionhandler: NativeExceptionHandler = (error) => {
  console.debug('NATIVE EXCEPTION!');
  crashlytics().recordError(new Error(error));
};

setNativeExceptionHandler(nativeExceptionhandler, false, false);

[W1nstar]

@bombillazo
thanks a ton for the input!

I'm unfamiliar with crashlytics, but I guess it writes a file with the exception, for a later use? By my own findings, it seems like theres no way to make an http request of any kind inside nativeExceptionHandler.

[bombillazo]

Verify your Android HTTP setup, I believe by default some modern android versions block http by default, I'm not an expert in Crashlytics either but so far we do get events streamed to firebase.

[W1nstar]

Yeah, I did, everything works correctly. Tested it on Androids 5 to 9, emulators and phyiscal terminals, same issue. Guess I'll have to store the event and somehow send it later.