onProgressChange not called

hi, i'm using your library to download file and when its reached 100% install apk or view image, but onProgressChange not being called, how to know which part that was miss by me?

xml
``

change listener
`@Override
public void onProgressChange(int current, int max) {
if (current == max){
//instal on apps
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
installOnDevice();
npb.setProgress(0);
}
}, 2000);
}
}`

in asynctask
`protected void onProgressUpdate(String... progress) {
// setting progress percentage
npb.setProgress(Integer.parseInt(progress[0]));
}`

install or view
`private void installOnDevice(){
File downloadedFile = new File(Environment.getExternalStorageDirectory() + "/" + fileName);
Log.d(TAG, "filename: " + fileName);
if (fileName.contains(".apk")){
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(downloadedFile), "application/vnd.android.package-archive");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
else if (fileName.contains(".jpg")){
Log.d(TAG, "set image to image view");
Glide.with(getActivity()).load(downloadedFile).into(ivBackground);
}
enableTap = true;
}`

thanks b4