how to create a folder in android External Storage Directory?

Question

I cannot create a folder in android External Storage Directory.

I have added permissing on manifest,

Answer 1

If you are trying to create a folder inside your app directory in your storage.

Step 1 : Add Permission

Step 2 : Add the following

private String createFolder(Context context, String folderName) {

    //getting app directory
    final File externalFileDir = context.getExternalFilesDir(null);

    //creating new folder instance
    File createdDir = new File(externalFileDir.getAbsoluteFile(),folderName);

    if(!createdDir.exists()){

    //making new directory if it doesn't exist already
        createdDir.mkdir();

    }
    return finalDir.getAbsolutePath() + "/" +  System.currentTimeMillis() + ".txt";
}