從assert文件下獲取文件名字

String[] fl1 = getAssets().list("第一層");得到數據  ["images", "hello.txt"]
String[] fl1 = getAssets().list("第一層/第二層");
得到數據  [ "helloworld.txt"]將assert文件copy到sd卡
/** * * @param fileName   "第一層/第二層/helloworld.txt" * @param desDir  "/mnt/sdcard/mypath/" * @throws Exception */PRivate void CopyAssetFile(String fileName, String desDir) throws Exception {    String strCPSDPath = desDir + fileName;//  "/mnt/sdcard/mypath/第一層/第二層/helloworld.txt"    File file = new File(strCpSdPath);        if (!file.getParentFile().exists()) {        if (!file.getParentFile().mkdirs()) {            Log.i("--CopyAssets--", "cannot create directory.");            throw new Exception("存儲卡寫入失敗！");        }    }    InputStream myInput = getAssets().open(fileName);    file.createNewFile();    OutputStream myOutput = new FileOutputStream(file, true);    byte[] buffer = new byte[1024];    int length;    while ((length = myInput.read(buffer)) > 0) {        myOutput.write(buffer, 0, length);    }    myOutput.flush();    myOutput.close();    myInput.close();}