How to handle AsyncTask failure

Question

Is there a specific way to handle failure in an AsyncTask? As far as I can tell the only way is with the return value of task. I\'d like to be able to provide more details o

Answer 1

I modified Nicholas's code a bit, should you want to do something in the UI thread in exception.

Remember the AsyncTask can only be executed once after instantiated.

class ErrorHandlingAsyncTask extends AsyncTask<..., ..., ...> {

    private Exception exception = null;

    protected abstract void onResult(Result result);

    protected abstract void onException(Exception e);

    protected abstract ... realDoInBackground(...);

    @Override
    final protected void onPostExecute(Result result) {
        if(result != null) {
            onResult(result);
        } else {
            onException(exception);
        }
    }

    @Override
    protected ... doInBackground(...) {
        try {
            return realDoInBackground(...);
        } catch(Exception e) {
            exception = e;
        }
        return null;
    }
}