Android Delete Internal Cache

Boolean clearInternalCache ()
{
    String[] cacheFiles = fileList();
    if (cacheFiles.length > 0)
    {
        for (int i=0; i <= cacheFiles.length; i++)
        {
            deleteFile(cacheFiles[i]);
            Log.i("InternalStorage", "Deleted: " + cacheFiles[i]);
        }
        return true;
    }
    else
    {
        return false;
    }
}