android, Comment renommer un fichier?

Dans votre code:

Ne devrait-il pas être:

File from = new File(directory, currentFileName);

Au Lieu de

File from = new File(directory, "currentFileName");

Pour la sécurité,

Utilisez le fichier.renameTo (). Mais vérifiez l'existence du répertoire avant de le renommer!

File dir = Environment.getExternalStorageDirectory();
if(dir.exists()){
    File from = new File(dir,"from.mp4");
    File to = new File(dir,"to.mp4");
     if(from.exists())
        from.renameTo(to);
}

Se référer: http://developer.android.com/reference/java/io/File.html#renameTo%28java.io.File%29

Utilisez cette méthode pour renommer un fichier. Le fichier from sera renommé to.

private boolean rename(File from, File to) {
    return from.getParentFile().exists() && from.exists() && from.renameTo(to);
}

Exemple de code:

public class MainActivity extends Activity {
    private static final String TAG = "YOUR_TAG";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        File currentFile = new File("/sdcard/currentFile.txt");
        File newFile  new File("/sdcard/newFile.txt");

        if(rename(currentFile, newFile)){
            //Success
            Log.i(TAG, "Success");
        } else {
            //Fail
            Log.i(TAG, "Fail");
        }
    }

    private boolean rename(File from, File to) {
        return from.getParentFile().exists() && from.exists() && from.renameTo(to);
    }
}

/**
 * ReName any file
 * @param oldName
 * @param newName
 */
public static void renameFile(String oldName,String newName){
    File dir = Environment.getExternalStorageDirectory();
    if(dir.exists()){
        File from = new File(dir,oldName);
        File to = new File(dir,newName);
         if(from.exists())
            from.renameTo(to);
    }
}

Exemple de travail...

   File oldFile = new File("your old file name");
    File latestname = new File("your new file name");
    boolean success = oldFile .renameTo(latestname );

   if(success)
    System.out.println("file is renamed..");

Fournir un objet de fichier cible avec un nom de fichier différent.

// Copy the source file to target file.
// In case the dst file does not exist, it is created
void copy(File source, File target) throws IOException {

    InputStream in = new FileInputStream(source);
    OutputStream out = new FileOutputStream(target);

    // 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();
}

Vous devriez vérifier si le répertoire existe!

File directory = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES), MEDIA_NAME);
if(!directory.exist()){
    directory.mkdirs();
}

C'est ce que j'ai fini par utiliser. Il gère le cas où il y a un fichier existant avec le même nom en ajoutant un entier au nom du fichier.

@NonNull
private static File renameFile(@NonNull File from, 
                               @NonNull String toPrefix, 
                               @NonNull String toSuffix) {
    File directory = from.getParentFile();
    if (!directory.exists()) {
        if (directory.mkdir()) {
            Log.v(LOG_TAG, "Created directory " + directory.getAbsolutePath());
        }
    }
    File newFile = new File(directory, toPrefix + toSuffix);
    for (int i = 1; newFile.exists() && i < Integer.MAX_VALUE; i++) {
        newFile = new File(directory, toPrefix + '(' + i + ')' + toSuffix);
    }
    if (!from.renameTo(newFile)) {
        Log.w(LOG_TAG, "Couldn't rename file to " + newFile.getAbsolutePath());
        return from;
    }
    return newFile;
}

    public void renameFile(File file,String suffix) {

    String ext = FilenameUtils.getExtension(file.getAbsolutePath());
    File dir = file.getParentFile();

    if(dir.exists()){
        File from = new File(dir,file.getName());
        String name = file.getName();
        int pos = name.lastIndexOf(".");
        if (pos > 0) {
            name = name.substring(0, pos);
        }
        File to = new File(dir,name+suffix+"."+ext);
        if(from.exists())
           from.renameTo(to);
    }

}