Is it correct to use while-loop to report progress and completion?

I have added zip4j library to my Android project. It is very easy to use.

ZipFile zipFile = new ZipFile(downloadedFilePath);
zipFile.extractAll(context.getFilesDir().getPath());

But there is one feature that I am concerned about. Instead of subscribing to get the progress of unzipping, they use while-loop as follows:

while (pm.getState() == ProgressMonitor.STATE_BUSY) {
    // my progress handler is here
}

And if I need to know that unzip is complete, I should use it as follows:

while (pm.getState() == ProgressMonitor.STATE_BUSY) {
    // the loop runs until progress monitor changes its status
}
if (pm.getResult() == ProgressMonitor.RESULT_SUCCESS) {
    // my code to handle completion
}

To me it looks as anti-pattern and poor coding. Should I use in my project, or switch to a different zip-library?