Example usage for android.app DownloadManager openDownloadedFile

Introduction

In this page you can find the example usage for android.app DownloadManager openDownloadedFile.

Prototype

public ParcelFileDescriptor openDownloadedFile(long id) throws FileNotFoundException 

Source Link

Document

Open a downloaded file for reading.

Usage

From source file:com.renard.ocr.help.OCRLanguageInstallService.java

@Override
protected void onHandleIntent(Intent intent) {
    if (!intent.hasExtra(DownloadManager.EXTRA_DOWNLOAD_ID)) {
        return;//ww  w. j  a  va2s .  com
    }
    final long downloadId = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, 0);
    if (downloadId != 0) {

        DownloadManager dm = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
        ParcelFileDescriptor file;
        try {
            file = dm.openDownloadedFile(downloadId);
            FileInputStream fin = new FileInputStream(file.getFileDescriptor());
            BufferedInputStream in = new BufferedInputStream(fin);
            FileOutputStream out = openFileOutput("tess-lang.tmp", Context.MODE_PRIVATE);
            GzipCompressorInputStream gzIn = new GzipCompressorInputStream(in);
            final byte[] buffer = new byte[2048 * 2];
            int n = 0;
            while (-1 != (n = gzIn.read(buffer))) {
                out.write(buffer, 0, n);
            }
            out.close();
            gzIn.close();
            FileInputStream fileIn = openFileInput("tess-lang.tmp");
            TarArchiveInputStream tarIn = new TarArchiveInputStream(fileIn);

            TarArchiveEntry entry = tarIn.getNextTarEntry();

            while (entry != null && !(entry.getName().endsWith(".traineddata")
                    && !entry.getName().endsWith("_old.traineddata"))) {
                entry = tarIn.getNextTarEntry();
            }
            if (entry != null) {
                File tessDir = Util.getTrainingDataDir(this);
                final String langName = entry.getName().substring("tesseract-ocr/tessdata/".length());
                File trainedData = new File(tessDir, langName);
                FileOutputStream fout = new FileOutputStream(trainedData);
                int len;
                while ((len = tarIn.read(buffer)) != -1) {
                    fout.write(buffer, 0, len);
                }
                fout.close();
                String lang = langName.substring(0, langName.length() - ".traineddata".length());
                notifyReceivers(lang);
            }
            tarIn.close();

        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            String tessDir = Util.getTessDir(this);
            File targetFile = new File(tessDir, OCRLanguageActivity.DOWNLOADED_TRAINING_DATA);
            if (targetFile.exists()) {
                targetFile.delete();
            }
        }

    }
}

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From source file:de.escoand.readdaily.DownloadHandler.java

@Override
public void onReceive(final Context context, final Intent intent) {
    final DownloadManager manager = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
    final Database db = Database.getInstance(context);
    final Cursor downloads = db.getDownloads();

    LogHandler.log(Log.WARN, "receive starting");

    while (downloads.moveToNext()) {
        final long id = downloads.getLong(downloads.getColumnIndex(Database.COLUMN_ID));
        final String name = downloads.getString(downloads.getColumnIndex(Database.COLUMN_SUBSCRIPTION));
        final String mime = downloads.getString(downloads.getColumnIndex(Database.COLUMN_TYPE));
        final Cursor download = manager.query(new DownloadManager.Query().setFilterById(id));

        // download exists
        if (!download.moveToFirst())
            continue;

        // download finished
        if (download.getInt(
                download.getColumnIndex(DownloadManager.COLUMN_STATUS)) != DownloadManager.STATUS_SUCCESSFUL)
            continue;

        // import file in background
        new Thread(new Runnable() {
            @Override/* w ww .  jav a2 s.com*/
            public void run() {
                try {
                    LogHandler.log(Log.WARN, "import starting of " + name);

                    final FileInputStream stream = new ParcelFileDescriptor.AutoCloseInputStream(
                            manager.openDownloadedFile(id));
                    final String mimeServer = manager.getMimeTypeForDownloadedFile(id);

                    LogHandler.log(Log.INFO, "id: " + String.valueOf(id));
                    LogHandler.log(Log.INFO, "manager: " + manager.toString());
                    LogHandler.log(Log.INFO, "stream: " + stream.toString());
                    LogHandler.log(Log.INFO, "mime: " + mime);
                    LogHandler.log(Log.INFO, "mimeServer: " + mimeServer);

                    switch (mime != null ? mime : (mimeServer != null ? mimeServer : "")) {

                    // register feedback
                    case "application/json":
                        final byte[] buf = new byte[256];
                        final int len = stream.read(buf);
                        LogHandler.log(Log.WARN, "register feedback: " + new String(buf, 0, len));
                        break;

                    // csv data
                    case "text/plain":
                        db.importCSV(name, stream);
                        break;

                    // xml data
                    case "application/xml":
                    case "text/xml":
                        db.importXML(name, stream);
                        break;

                    // zipped data
                    case "application/zip":
                        db.importZIP(name, stream);
                        break;

                    // do nothing
                    default:
                        LogHandler.log(new IntentFilter.MalformedMimeTypeException());
                        break;
                    }

                    stream.close();
                    LogHandler.log(Log.WARN, "import finished (" + name + ")");
                }

                // file error
                catch (FileNotFoundException e) {
                    LogHandler.logAndShow(e, context, R.string.message_download_open);
                }

                // stream error
                catch (IOException e) {
                    LogHandler.logAndShow(e, context, R.string.message_download_read);
                }

                // xml error
                catch (XmlPullParserException e) {
                    LogHandler.logAndShow(e, context, R.string.message_download_xml);
                }

                // clean
                finally {
                    manager.remove(id);
                    db.removeDownload(id);
                    LogHandler.log(Log.WARN, "clean finished");
                }
            }
        }).start();
    }

    downloads.close();
    LogHandler.log(Log.WARN, "receiving done");
}

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