SenseCrypt Android SDK/com.sensecrypt.sdk.demo.activities/DownloadProgressActivity

DownloadProgressActivity

public final class DownloadProgressActivity extends AppCompatActivity

DownloadProgressActivity handles the downloading of model files required for the SenseCrypt SDK.

Key Features:

Progress Bar UI: Shows real-time download progress
Error Handling: Uses UIHelper for consistent error presentation
Download Management: Handles model file downloads and status checks
Cleanup: Properly cleans up resources on error/cancellation

Error Handling Strategy:

All errors (network, server, etc.) are treated as unrecoverable
No retry option is provided to ensure clean app state
If error occurs during initial app launch (from MainActivity):

Shows error dialog
On dialog close, finishes all activities (closes app)

If error occurs during manual download (from Settings):

Shows error dialog
On dialog close, returns to previous screen

Download Process:

Start download session
Monitor download progress
On completion: Initialize SDK and proceed
On error: Show dialog and close/return based on launch source

Constructors

DownloadProgressActivity

public DownloadProgressActivity DownloadProgressActivity()

Types

Companion

public class Companion

Properties

cancelButton

private AppCompatButton cancelButton

Companion

public final static DownloadProgressActivity.Companion Companion

downloadJob

private Job downloadJob

EXTRA_FROM_MAIN

private final static String EXTRA_FROM_MAIN

frModelBin

private final FileDownloadInfo frModelBin

isFetchingStatus

private Boolean isFetchingStatus

progressBar

private ProgressBar progressBar

Functions

downloadFiles

private final Unit downloadFiles(String fileURl)

Initiates the download of required model files.

downloadFilesIfNeeded

private final String downloadFilesIfNeeded(Context context)

Checks if the directory exist and if not then it will create a directory in the application folder

getCancelButton

private final AppCompatButton getCancelButton()

getDownloadJob

private final Job getDownloadJob()

getFrModelBin

private final FileDownloadInfo getFrModelBin()

getProgressBar

private final ProgressBar getProgressBar()

initSDK

private final Unit initSDK()

Initializes the SDK in a background thread and shows a loading dialog. This ensures the SDK is set up correctly after switching modes.

isFetchingStatus

private final Boolean isFetchingStatus()

onCreate

protected Unit onCreate(Bundle savedInstanceState)

onDownloadCompleted

private final Unit onDownloadCompleted()

This function gets executed when the models download have been completed

setCancelButton

private final Unit setCancelButton(AppCompatButton cancelButton)

setDownloadJob

private final Unit setDownloadJob(Job downloadJob)

setFetchingStatus

private final Unit setFetchingStatus(Boolean isFetchingStatus)

setProgressBar

private final Unit setProgressBar(ProgressBar progressBar)

setupComponents

private final Unit setupComponents()

setUpListeners

private final Unit setUpListeners()

stopDownloadSession

private final Unit stopDownloadSession()

When the cancel button is clicked or exception have been thrown during download session this function gets executed

updateDownloadProgress

private final Unit updateDownloadProgress()

Monitors and updates the download progress.