sajjadkhafansample.kt

    @SuppressLint("Range")
    private suspend fun downloadFromScratch() {
        try {
            val downloadManager = getSystemService(DownloadManager::class.java)

            val request = DownloadManager.Request(currentUrl.toUri()).setMimeType("video/*")
                .setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI and DownloadManager.Request.NETWORK_MOBILE)
                .setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE)
                .setTitle("در حال دانلود فیلم " + currentTitle).setDestinationInExternalPublicDir(
                    Environment.DIRECTORY_DOWNLOADS, DOWNLOADS_SUB_DIRECTORY + currentTitle
                )
            val downloadId = downloadManager.enqueue(request)


            val query = DownloadManager.Query().setFilterById(downloadId)
            var isDownloading = true
            val downloadModel = DownloadModel(
                title = currentTitle,
                fileName = currentTitle,
                url = currentUrl,
                downloadedBytes = 0,
                downloadId = downloadId,
                directory = Environment.DIRECTORY_DOWNLOADS + DOWNLOADS_SUB_DIRECTORY + currentTitle,
                percentage = 0,
                startDateTime = getCurrentDateTime()
            )

            runningDownloadList.add(
                downloadModel
            )
            db.appDao().insertNewDownload(downloadModel)

            withContext(Dispatchers.Main) {
                runningAdapter.notifyDataSetChanged()
            }

            while (isDownloading) {
                val cursor = downloadManager.query(query)
                if (cursor.moveToFirst()) {
                    val bytesDownloaded = cursor.getLong(
                        cursor.getColumnIndex(DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR)
                    )
                    val bytesTotal = cursor.getInt(
                        cursor.getColumnIndex(DownloadManager.COLUMN_TOTAL_SIZE_BYTES)
                    )

                    val status = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS))
                    if (status == DownloadManager.STATUS_SUCCESSFUL) {
                        isDownloading = false
                    } else if (status == DownloadManager.STATUS_FAILED) {
                        val reason =
                            cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_REASON))
                        // listener?.onFailed("Download failed: $reason")
                    }

                    if (bytesTotal > 0) {
                        val progress = (bytesDownloaded * 100L / bytesTotal).toInt()
                        db.appDao().updatePercentageDownload(downloadId, bytesDownloaded, progress)
                        withContext(Dispatchers.Main) {
                            runningDownloadList.first().downloadedBytes = bytesDownloaded.toLong()
                            runningDownloadList.first().percentage = progress
                            runningAdapter.notifyDataSetChanged()
                        }
                        // listener?.onProgress(progress)
                    }
                }
                cursor.close()
            }
        } catch (e: Exception) {
            e.printStackTrace()
        }
    }