Android retrofit to download file

NaviRamyle NaviRamyle 3, 1 1 gold badge 29 29 silver badges 49 49 bronze badges. Thanks for the response, I will try it and will get back to you.

That's an object class, you can change it to just Object — NaviRamyle. I get this error: Only methods having Response as data type are allowed to have Streaming annotation. I'm using asynchronous mode. Ehsan you can use Response import retrofit.

Response; as model and get a String from that Response object. Show 2 more comments. This code won't even compile. You can't initialize things in an Interface.

For IOUtils, add dependency implementation 'org. CoolMind 20k 12 12 gold badges silver badges bronze badges. Shahid Khan Shahid Khan 2 2 silver badges 10 10 bronze badges. This solution requires RxJava and AsyncTask. And why would you use AsyncTask when you have RxJava? If you read this, please, don't use the answer above. It mixes different programming approaches without any advantage. You can now easily pass a dynamic value as full URL to the request call.

This can be especially helpful when downloading files, which are dependent of a parameter, user or time. You can build the URL during runtime and request the exact file without any hacks. If you haven't worked with dynamic URLs yet, feel free to head over to our blog post for that topic: dynamic urls in Retrofit 2. If you're confused by the ServiceGenerator. Once we've created the service, we'll make the request just like any other Retrofit call! There is just one thing left, which currently hides behind the function writeResponseBodyToDisk : writing the file to the disk!

The writeResponseBodyToDisk method takes the ResponseBody object and reads and writes the byte values of it to the disk. The code looks much more difficult than it actually is:. You might need to adjust the first line on where and with what name your file is being saved.

When you have done that, you're ready to download files with Retrofit! But we're not completely ready for all files yet. There is one major issue: by default, Retrofit puts the entire server response into memory before processing the result. If your app needs to download even slightly larger files, we strongly recommend reading the next section. In order to avoid that, we've to add a special annotation to the request declaration:.

The Streaming declaration doesn't mean you're watching a Netflix file. It means that instead of moving the entire file into memory, it'll pass along the bytes right away. But be careful, if you're adding the Streaming declaration and continue to use the code above, Android will trigger a android. Thus, the final step is to wrap the call into a separate thread, for example with a lovely ASyncTask:. You can still use the same writeResponseBodyToDisk method.

If you remember the Streaming declaration and this snippet, you can download even large files with Retrofit efficiently. If you download files in the foreground and they are not small, you might want to inform the user on your actions. Ideally, you would display progress updates how much you've downloaded already.

We've another tutorial on how to download files with progress updates. In this tutorial you've seen how to download files with Retrofit efficiently. This is everything you need to know to download files with Retrofit. Using the enqueue method we can start the request. Inside it, we need to create an AsyncTask or use RxJava. This progress is for saving to disk please try to download a file greater than 5mb and just monitor….. It was very helpful.

Thank you. I succeeded in downloading images from nodejs server using this example. What should I do? The whole progress happens after the file is downloaded.

Please consider testing before publishing to the world. The downloaded file is stored in Downloads directory. The total file size is obtained by calling contentLength method on ResponseBody object which returns result in bytes. While downloading the file the notification is sent every 1 second so that it does not affect the main thread. When the download is completed the onDownloadComplete method is called.

The sendNotification method updates the notification progress. The onTaskRemoved method will be called when the app is destroyed completely. Butter Knife is used for View binding.

The Broadcast Receiver is registered to receive progress from Service. The DownloadService is started when the Download button is pressed.

Since we require write external storage permission we request the permission on run time before starting the service. Download Github. Top level Gradle. Inner Gradle app's. Parcel; import android. ResponseBody; import retrofit2.

Call; import retrofit2. GET; import retrofit2. IntentService; import android. NotificationManager; import android. Context; import android.