get number of files in a directory and its subdirectories

Question

using this code

new File(\"/mnt/sdcard/folder\").listFiles().length

returns a sum of folders and files in a particular directory without ca

Answer 1

public int numberOfFiles(File srcDir) {
    int count = 0;
    File[] listFiles = srcDir.listFiles();
    for(int i = 0; i < listFiles.length; i++){
        if (listFiles[i].isDirectory()) {
            count += numberOfFiles(listFiles[i]);
        } else if (listFiles[i].isFile()) {
            count++;
        }
    }
    return count;
}