I use this method:
Boolean isFileDownloaded(String downloadPath, String fileName) {
File dir = new File(downloadPath);
File[] dirContents = dir.listFiles();
for (int i = 0; i < dirContents.length; i++) {
if (dirContents[i].getName().equals(fileName)) {
// File has been found, it can now be deleted:
dirContents[i].delete();
return true;
}
}
return false;
}