MainActivity.kt

@Composable
fun Home() {
    Column(
        modifier = Modifier
            .fillMaxSize()
            .padding(32.dp),
        verticalArrangement = Arrangement.Center,
        horizontalAlignment = Alignment.CenterHorizontally
    ) {
        val data = remember {
            mutableStateOf(
                File(
                    id = "10",
                    name = "Pdf File 10 MB",
                    type = "PDF",
                    url = "https://www.learningcontainer.com/wp-content/uploads/2019/09/sample-pdf-download-10-mb.pdf",
                    downloadedUri = null
                )
            )
        }

        ItemFile(
            file = data.value,
            startDownload = {
                startDownloadingFile(
                    file = data.value,
                    success = {
                        data.value = data.value.copy().apply {
                            isDownloading = false
                            downloadedUri = it
                        }
                    },
                    failed = {

                        data.value = data.value.copy().apply {
                            isDownloading = false
                            downloadedUri = null
                        }
                    },
                    running = {
                        data.value = data.value.copy().apply {
                            isDownloading = true
                        }
                    }
                )
            },
            openFile = {
                val intent = Intent(Intent.ACTION_VIEW)
                intent.setDataAndType(it.downloadedUri?.toUri(),"application/pdf")
                intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
                try {
                    startActivity(intent)
                }catch (e:ActivityNotFoundException){
                    Toast.makeText(
                        this@MainActivity,
                        "Can't open Pdf",
                        Toast.LENGTH_SHORT
                    ).show()
                }
            }
        )
    }
}