Java Code Examples for android.support.v4.provider.DocumentFile#listFiles()

public void listElements(TGBrowserCallBack<List<TGBrowserElement>> cb) {
	try {
		List<TGBrowserElement> elements = new ArrayList<TGBrowserElement>();
		if( this.element != null ) {
			DocumentFile file = this.element.getFile();
			if( file.exists() && file.isDirectory() ) {
				DocumentFile[] children = file.listFiles();
				if( children != null ) {
					for(DocumentFile child : children){
						elements.add(new TGSafBrowserElement(child, this.element));
					}
				}
			}
			if( !elements.isEmpty() ){
				Collections.sort(elements, new TGBrowserElementComparator());
			}
		}

		cb.onSuccess(elements);
	} catch (Throwable e) {
		cb.handleError(e);
	}
}
 

/**
 * Recursively search for {@link IndexV1Updater#SIGNED_FILE_NAME} starting
 * from the given directory, looking at files first before recursing into
 * directories.  This is "depth last" since the index file is much more
 * likely to be shallow than deep, and there can be a lot of files to
 * search through starting at 4 or more levels deep, like the fdroid
 * icons dirs and the per-app "external storage" dirs.
 */
private void searchDirectory(DocumentFile documentFileDir) {
    DocumentFile[] documentFiles = documentFileDir.listFiles();
    if (documentFiles == null) {
        return;
    }
    boolean foundIndex = false;
    ArrayList<DocumentFile> dirs = new ArrayList<>();
    for (DocumentFile documentFile : documentFiles) {
        if (documentFile.isDirectory()) {
            dirs.add(documentFile);
        } else if (!foundIndex) {
            if (IndexV1Updater.SIGNED_FILE_NAME.equals(documentFile.getName())) {
                registerRepo(documentFile);
                foundIndex = true;
            }
        }
    }
    for (DocumentFile dir : dirs) {
        searchDirectory(dir);
    }
}
 

private static boolean deleteDirectory(DocumentFile documentFile) {
    DocumentFile files[] = documentFile.listFiles();
    for (DocumentFile file : files) {
        Logger.log("File Name :-  " + file.getName());
        if (file.isDirectory()) {
            deleteDirectory(file);
        } else {
            return file.delete();
        }
    }
    return false;
}
 

/**
   * Returns an array of list of files at a specific path in OTG
   *
   * @param path    the path to the directory tree, starts with prefix 'otg:/'
   *                Independent of URI (or mount point) for the OTG
   * @param context context for loading
   * @return an array of list of files at the path
   */
  public static ArrayList<BaseFile> getDocumentFilesList(final String path, final Context context, final ContentFragment.LoadFiles updater) {
      final SharedPreferences manager = PreferenceManager.getDefaultSharedPreferences(context);
      final String rootUriString = manager.getString(ExplorerActivity.KEY_PREF_OTG, null);
      DocumentFile rootUri = DocumentFile.fromTreeUri(context, Uri.parse(rootUriString));
      ArrayList<BaseFile> files = new ArrayList<>(1024);

      final String[] parts = path.split("/");
      for (int i = 0; i < parts.length; i++) {

          // first omit 'otg:/' before iterating through DocumentFile
          if (path.equals(OTGUtil.PREFIX_OTG + "/")) break;
          if (parts[i].equals("otg:") || parts[i].equals("")) continue;
          Log.d(context.getClass().getSimpleName(), "Currently at: " + parts[i]);
          // iterating through the required path to find the end point
          rootUri = rootUri.findFile(parts[i]);
      }

long prevUpdate = System.currentTimeMillis();
Log.d(context.getClass().getSimpleName(), "Found URI for: " + rootUri.getName());
      // we have the end point DocumentFile, list the files inside it and return
      for (DocumentFile file : rootUri.listFiles()) {
          try {
              if (file.exists()) {
                  long size = 0;
                  if (!file.isDirectory()) size = file.length();
                  Log.d(context.getClass().getSimpleName(), "Found file: " + file.getName());
                  BaseFile baseFile = new BaseFile(path + "/" + file.getName(),
                          RootHelper.parseDocumentFilePermission(file), file.lastModified(), size, file.isDirectory());
                  baseFile.setName(file.getName());
                  baseFile.setMode(OpenMode.OTG);
                  files.add(baseFile);
			final long present = System.currentTimeMillis();
			if (updater != null && present - prevUpdate > 1000 && !updater.busyNoti) {
				prevUpdate = present;
				updater.publish(files);
				files = new ArrayList<>(1024);
			}
              }
          } catch (Exception e) {
          }
      }
if (updater != null) {
	updater.publish(files);
}
      return files;
  }