Download files

Download to file

If you uploaded the data using the key ExampleKey, you can retrieve the data using Amplify.Storage.downloadFile.

1Amplify.Storage.downloadFile(
2        "ExampleKey",
3        new File(getApplicationContext().getFilesDir() + "/download.txt"),
4        result -> Log.i("MyAmplifyApp", "Successfully downloaded: " + result.getFile().getName()),
5        error -> Log.e("MyAmplifyApp",  "Download Failure", error)
6);

Track download progress

To track progress of the download, use the downloadFile API that includes a progress listener callback.

1Amplify.Storage.downloadFile(
2        "ExampleKey",
3        new File(getApplicationContext().getFilesDir() + "/download.txt"),
4        StorageDownloadFileOptions.defaultInstance(),
5        progress -> Log.i("MyAmplifyApp", "Fraction completed: " + progress.getFractionCompleted()),
6        result -> Log.i("MyAmplifyApp", "Successfully downloaded: " + result.getFile().getName()),
7        error -> Log.e("MyAmplifyApp",  "Download Failure", error)
8);

Generate a download URL

You can also retrieve a URL for the object in storage:

1Amplify.Storage.getUrl(
2    "ExampleKey",
3    result -> Log.i("MyAmplifyApp", "Successfully generated: " + result.getUrl()),
4    error -> Log.e("MyAmplifyApp", "URL generation failure", error)
5);

Upload files

Query transfers