Example of new FileProvider usage

AndroidManifest.xml

<provider
    android:name="android.support.v4.content.FileProvider"
    android:authorities="${applicationId}.provider"
    android:exported="false"
    android:grantUriPermissions="true">
    <meta-data
        android:name="android.support.FILE_PROVIDER_PATHS"
        android:resource="@xml/provider_paths"/>
</provider>

provider_paths.xml

<paths>
    <external-path name="Download" path="Download/" />
</paths>

ReportsActivity.kt

private val downloadReceiver = object: BroadcastReceiver() {
    val TAG = DownloadManager::class.java.simpleName

    override fun onReceive(context: Context?, intent: Intent?) {
        val manager = getSystemService(Context.DOWNLOAD_SERVICE) as DownloadManager
        val downloadedId = intent!!.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1L)

        // read download session information
        manager.query(DownloadManager.Query().setFilterById(downloadedId))?.let {
            it.moveToFirst()

            val status = it.getInt(it.getColumnIndex(DownloadManager.COLUMN_STATUS))

            if (status == DownloadManager.STATUS_SUCCESSFUL) {
                var path = it.getString(it.getColumnIndex(DownloadManager.COLUMN_LOCAL_URI))
                if (path.substring(0, 7).matches(Regex("file://"))) {
                    path =  path.substring(7)
                }

                try {
                    val providerId = BuildConfig.APPLICATION_ID + ".provider"
                    val uri = FileProvider.getUriForFile(context, providerId, File(path))
                    openPdf(uri)
                }
                catch (ex: IllegalArgumentException) {
                    Logger.e(TAG, "Problems with FileProvider configuration.", ex)
                }
            }
            else if (status == DownloadManager.STATUS_FAILED) {
                toast(R.string.error_report_download)

                val reason = it.getInt(it.getColumnIndex(DownloadManager.COLUMN_REASON))
                Logger.w(TAG, "Download failed. Status: $status, reason: $reason")
            }
        }
    }
}

private fun openPdf(uri: Uri) {
    val openIntent = Intent(Intent.ACTION_VIEW)
    openIntent.setDataAndType(uri, "application/pdf")
    openIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)

    if (openIntent.isActionAvailable(this)) {
        startActivity(openIntent)
    }
}