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Uploading Files and Graphics

Graphics allow you to better customize what you would like to have your users see and provide a better User Interface.

When developing an application using SmartDeviceLink, two things must always be remembered when using graphics:

  1. You may be connected to a head unit that does not display graphics.
  2. You must upload them from your mobile device to Core before using them.

Many of these features will be handled for you automatically by the ScreenManager and other managers. This guide will be for using the FileManager directly through SdlManager

Detecting if Graphics are Supported

Being able to know if graphics are supported is a very important feature of your application, as this avoids you uploading unnecessary images to the head unit. In order to see if graphics are supported, use the getCapability() method of a valid SystemCapabilityManager obtained from sdlManager.getSystemCapabilityManager() to find out the display capabilities of the head unit.

sdlManager.getSystemCapabilityManager().getCapability(SystemCapabilityType.DISPLAY, new OnSystemCapabilityListener(){

   public void onCapabilityRetrieved(Object capability){
      DisplayCapabilities dispCapability = (DisplayCapabilities) capability;

   public void onError(String info){
      Log.i(TAG, "Capability could not be retrieved: "+ info);

SDL File and SDL Artwork

SDL files and artwork are uploaded through the FileManager. This is accomplished with SdlFile and SdlArtwork objects. The FileManager helps streamline the file management workflow within SDL. SdlArtwork is an extension of SdlFile that pertains only to graphic specific file types, and its use case is similar. For the rest of this document, SdlFile will be described, but everything also applies to SdlArtwork.


The first step in uploading files to the connected module is creating an instance of SdlFile. There are a few different constructors that can be used based on the source of the file. The following can be used to instantiate SdlFile:

A resource ID
new SdlFile(@NonNull String fileName, @NonNull FileType fileType, int id, boolean persistentFile)
new SdlFile(@NonNull String fileName, @NonNull FileType fileType, Uri uri, boolean persistentFile)
A byte array
new SdlFile(@NonNull String fileName, @NonNull FileType fileType, byte[] data, boolean persistentFile)

Uploading a File

Uploading a file with the FileManager is a simple process. With an instantiated SdlManager,
you can simply call:

sdlManager.getFileManager().uploadFile(sdlFile, new CompletionListener() {
    public void onComplete(boolean success) {


Uploading multiple files

Sometimes you need to upload more than one file. We've got you covered. Simply create a List<SdlFile> object, add your files, and then call:

sdlManager.getFileManager().uploadFiles(sdlFileList, new MultipleFileCompletionListener() {
    public void onComplete(Map<String, String> errors) {


Uploading Artwork

As mentioned before, the behavior of SdlFile and SdlArtwork are the same. But to help separate code, we have also included uploadArtwork and uploadArtworks methods to the FileManager that work the same as their SdlFile counterparts shown above.

File Naming

The file name can only consist of letters (a-Z) and numbers (0-9), otherwise the SDL Core may fail to find the uploaded file (even if it was uploaded successfully).

File Persistance

SdlFile supports uploading persistent images, i.e. images that do not become deleted when your application disconnects. Persistence should be used for images relating to your UI like your app icon, and not for dynamic aspects, such as Album Artwork.


Be aware that persistence will not work if space on the head unit is limited. Persistence is also not guaranteed.

Overwrite Stored Files

If a file being uploaded has the same name as an already uploaded file, the new file will overwrite the previous file.

Check if a File Has Already Been Uploaded

FileManager provides two methods that allow you to check if a file has been uploaded.

Getting Remote Files

getRemoteFileNames() returns a List<String> of the names of files that are uploaded to the head unit.

List<String> files = sdlManager.getFileManager().getRemoteFileNames();

See If A File is Uploaded

hasUploadedFile takes an SdlFile and returns a boolean of whether it is uploaded or not.

boolean isUploaded = sdlManager.getFileManager().hasUploadedFile(sdlFile);

Check the Amount of File Storage

To find the amount of file storage left on the head unit, use the ListFiles RPC.

ListFiles listFiles = new ListFiles();
listFiles.setOnRPCResponseListener(new OnRPCResponseListener() {
    public void onResponse(int correlationId, RPCResponse response) {
            Integer spaceAvailable = ((ListFilesResponse) response).getSpaceAvailable();
            Log.i("SdlService", "Space available on Core = " + spaceAvailable);
            Log.i("SdlService", "Failed to request list of uploaded files.");


Delete Stored Files

As with uploading, there are two methods that allow you to delete remote files.

For a single file

To delete a single file, call deleteRemoteFileWithName() and pass in the file name as a string. You can optionally pass in a CompletionListener.

sdlManager.getFileManager().deleteRemoteFileWithName("testFile", new CompletionListener() {
    public void onComplete(boolean success) {


Multiple files

To delete multiple files, call deleteRemoteFilesWithNames() and pass in a list with the names of the files you want to delete. You can optionally pass in a MultipleFileCompletionListener.

sdlManager.getFileManager().deleteRemoteFilesWithNames(remoteFiles, new MultipleFileCompletionListener() {
    public void onComplete(Map<String, String> errors) {


Image Specifics

Image File Type

Images may be formatted as PNG, JPEG, or BMP. Check the DisplayCapabilities object provided by sdlManager.getSystemCapabilityManager().getCapability() to find out what image formats the head unit supports.

Image Sizes

If an image is uploaded that is larger than the supported size, that image will be scaled down to accommodate.

Image Specifications

ImageName Used in RPC Details Height Width Type
softButtonImage Show Will be shown on softbuttons on the base screen 70px 70px png, jpg, bmp
choiceImage CreateInteractionChoiceSet Will be shown in the manual part of an performInteraction either big (ICON_ONLY) or small (LIST_ONLY) 70px 70px png, jpg, bmp
choiceSecondaryImage CreateInteractionChoiceSet Will be shown on the right side of an entry in (LIST_ONLY) performInteraction 35px 35px png, jpg, bmp
vrHelpItem SetGlobalProperties Will be shown during voice interaction 35px 35px png, jpg, bmp
menuIcon SetGlobalProperties Will be shown on the “More…” button 35px 35px png, jpg, bmp
cmdIcon AddCommand Will be shown for commands in the "More…" menu 35px 35px png, jpg, bmp
appIcon SetAppIcon Will be shown as Icon in the "Mobile Apps" menu 70px 70px png, jpg, bmp
graphic Show Will be shown on the basescreen as cover art 185px 185px png, jpg, bmp
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