Android Utililty Methods Directory Content Get

List<File> list = getFileList(f);
boolean check = true;
while (check) {
    check = false;
    List<File> listtmp = list;
    List<File> listtmp2 = new ArrayList<File>();
    ;
    for (File checktmp : listtmp) {
...

List<File> fileList = new ArrayList<>();
File[] files = parentDir.listFiles();
if (files != null) {
    for (File file : files) {
        if (file.isFile()) {
            fileList.add(file);
return fileList;

if (fileList != null) {
    File[] files = rootDir.listFiles();
    if (files != null) {
        for (File file : files) {
            if (file.isFile()) {
                fileList.add(file);
            } else if (file.isDirectory()) {
                getFilesAndSubFolderFiles(fileList, file);
...

List dirs = new ArrayList();
File[] fileArray = file.listFiles();
for (int i = 0; i < fileArray.length; i++) {
    if (fileArray[i].isDirectory()) {
        dirs.add(fileArray[i].getName());
return (String[]) dirs.toArray(new String[0]);
...

return listDirs(new File(fileName));

String absolutPath = dir.getAbsolutePath();
String[] paths = dir.list();
String[] files = new String[paths.length];
for (int i = 0; i < paths.length; i++) {
    files[i] = absolutPath + "/" + paths[i];
return files;

List<File> list = new ArrayList<File>();
if (dir.exists()) {
    for (File f : dir.listFiles()) {
        if (f.isFile()) {
            list.add(f);
return list;

return rootDir.listFiles(new FilenameFilter() {
    @Override
    public boolean accept(File dir, String name) {
        for (String s : sufix) {
            if (name.toLowerCase().endsWith(s.toLowerCase())) {
                return true;
        return false;
});

ArrayList<String> fileList = new ArrayList<String>();
File dir = new File(path);
File[] files = dir.listFiles();
if (files == null)
    return null;
for (int i = 0; i < files.length; i++) {
    if (files[i].isDirectory()) {
        getFileList(files[i].getAbsolutePath());
...

File dir = new File(directoryPath);
if (!dir.exists()) {
    return null;
File[] files = null;
if (isOnlyFile) {
    files = dir.listFiles(new FileFilter() {
        @Override
...