Android將InputStream轉換為String和byte[]

為什要將InputStream轉換為String？因為要實現加密功能，加密函數的輸入都是String。

public static String inputStream2String (InputStream in) throws IOException   { StringBuffer out = new StringBuffer();         byte[]  b = new byte[4096];         int n;        while ((n = in.read(b))!= -1){             out.append(new String(b,0,n));     }        Log.i("String的長度",new Integer(out.length()).toString());        return  out.toString(); }

通過各種getInputStream，就可以將HttpUrlconnection、輸入文字資料流等等轉換為String，當然還可以轉化為byte[]

public static byte[] InputStreamToByte(InputStream is) throws IOException {   ByteArrayOutputStream bytestream = new ByteArrayOutputStream();   int ch;   while ((ch = is.read()) != -1) {    bytestream.write(ch);   }   byte imgdata[] = bytestream.toByteArray();   bytestream.close();   return imgdata;  }