Android: How to list all the files in a directory in to an array?

Question

I have a variable "directorypath". It has the path to a directory in sd card.

Ex: "sdcard/images/scenes"

Now, I want to list all the files in the "directorypath" and want an Array to store all the file names in it.

Ex: Array[0]= Filename1, Array[1]= Filename2 Etc... 

I tried something like Array[] myArray = directorypath.listfile(); but didn't work..! Can anyone give me the code or at least help me? Much appreciated.

Answer 1

I think the problem you are facing is related to the external storage directory file path. Don't use whole path as variable if you can access with environment.

String path = Environment.getExternalStorageDirectory().toString()+"/images/scenes"; 

Also, you can use the API listfiles() with file object and it will work. For eg ::

File f = new File(path);        
File file[] = f.listFiles();

Answer 2

Try the following code which may help you

List<File> getListFiles(File parentDir) {
    ArrayList<File> inFiles = new ArrayList<File>();
    File[] files = parentDir.listFiles();
    for (File file : files) {
        if (file.isDirectory()) {
            inFiles.addAll(getListFiles(file));
        } else {
                inFiles.add(file);
        }
    }
    return inFiles;
}

This will return you list of files under the directory you specified.
From the File object in list.. you will get all information about files you required.

Answer 3

According to your error message "Cannot resolve listFiles()", you are trying to call a method on a String object, when you actually want to be calling that on a File object.

Create a new File object,

String parentDirectory = "path/to/files";
File dirFileObj = new File(parentDirectory);
File[] files = dirFileObj.listFiles();

Answer 4

I was indeed calling a function for improper data type. ie, listfiles() won't work on String type variable..!!

SO, I created a File type variable and a File[] array to pass the list of files..! This solved the issue.

Answer 5

its very simple Just two lines of code

 File mListofFiles = new File(Environment.getExternalStorageDirectory.getAbsolutePath()+"/",childpath:Foldername);
 File f = new File(mListofFiles.toString());        
 File file[] = f.listFiles();     

Answer 6

Try the following code:

File externalStorageDirectory = Environment.getExternalStorageDirectory();
File folder = new File(externalStorageDirectory.getAbsolutePath() + "/FilePath");
File file[] = folder.listFiles();
if (file.length != 0) {
    for (int i = 0; i < file.length; i++) {
        //here populate your list
    }
} else {
    //no file available
}