Skopiuj pliki z folderu karty SD do innego folderu karty SD

Question

Skopiuj pliki z folderu karty SD do innego folderu karty SD

Czy można skopiować folder obecny w sdcard do innego folderu prezentującego tę samą sdcard programowo ??

Jeśli tak, to jak to zrobić?

17

android copy folder android-file android-sdcard

Author: Bharath, 2011-04-19

Source

4 answers

Zobacz przykład tutaj . Karta sd jest zewnętrzną pamięcią masową, dzięki czemu można uzyskać do niej dostęp poprzez getExternalStorageDirectory.

15

Author: Vladimir Ivanov,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/doraprojects.net/template/agent.layouts/content.php on line 54
2011-04-19 11:00:27

Tak jest to możliwe i używam poniższej metody w moim kodzie . Hope use full to you: -

public static void copyDirectoryOneLocationToAnotherLocation(File sourceLocation, File targetLocation)
        throws IOException {

    if (sourceLocation.isDirectory()) {
        if (!targetLocation.exists()) {
            targetLocation.mkdir();
        }

        String[] children = sourceLocation.list();
        for (int i = 0; i < sourceLocation.listFiles().length; i++) {

            copyDirectoryOneLocationToAnotherLocation(new File(sourceLocation, children[i]),
                    new File(targetLocation, children[i]));
        }
    } else {

        InputStream in = new FileInputStream(sourceLocation);

        OutputStream out = new FileOutputStream(targetLocation);

        // Copy the bits from instream to outstream
        byte[] buf = new byte[1024];
        int len;
        while ((len = in.read(buf)) > 0) {
            out.write(buf, 0, len);
        }
        in.close();
        out.close();
    }

}

4

Author: duggu,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/doraprojects.net/template/agent.layouts/content.php on line 54
2013-02-07 10:28:38

Aby przenieść pliki lub katalogi, możesz użyć funkcji File.renameTo(String path)

File oldFile = new File (oldFilePath);
oldFile.renameTo(newFilePath);

0

Author: Amjad Abu Saa,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/doraprojects.net/template/agent.layouts/content.php on line 54
2013-05-20 00:47:54

score 36 · Accepted Answer

Ulepszona wersja tego przykładu:

// If targetLocation does not exist, it will be created.
public void copyDirectory(File sourceLocation , File targetLocation)
throws IOException {

    if (sourceLocation.isDirectory()) {
        if (!targetLocation.exists() && !targetLocation.mkdirs()) {
            throw new IOException("Cannot create dir " + targetLocation.getAbsolutePath());
        }

        String[] children = sourceLocation.list();
        for (int i=0; i<children.length; i++) {
            copyDirectory(new File(sourceLocation, children[i]),
                    new File(targetLocation, children[i]));
        }
    } else {

        // make sure the directory we plan to store the recording in exists
        File directory = targetLocation.getParentFile();
        if (directory != null && !directory.exists() && !directory.mkdirs()) {
            throw new IOException("Cannot create dir " + directory.getAbsolutePath());
        }

        InputStream in = new FileInputStream(sourceLocation);
        OutputStream out = new FileOutputStream(targetLocation);

        // Copy the bits from instream to outstream
        byte[] buf = new byte[1024];
        int len;
        while ((len = in.read(buf)) > 0) {
            out.write(buf, 0, len);
        }
        in.close();
        out.close();
    }
}

Ma lepszą obsługę błędów i lepsze uchwyty, jeśli przekazany plik docelowy leży w katalogu, który nie istnieje.