Android: How to use download manager class?

Question

I want to download a binary file from a url. Is it possible to use the Android download manager class that I found here DownloadManager class?

Answer 1

Make sure the READ_EXTERNAL_STORAGE and WRITE_EXTERNAL_STORAGE permissions is in your Manifest.xml file:

And then include this code in your download function

if(ActivityCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED || ActivityCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED){

  // this will request for permission when user has not granted permission for the app 
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1); 
}

else{ 
     //Download Script

DownloadManager downloadManager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);       
Uri uri = Uri.parse("URL of file to download");         
DownloadManager.Request request = new DownloadManager.Request(uri);        
 request.setVisibleInDownloadsUi(true);        request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);        
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, uri.getLastPathSegment());        
downloadManager.enqueue(request);
 }