Android获取本应用的MD5值

有些对安全要求比较高的应用，需要和服务器做MD5的校验，这里提供Android获取本应用的MD5值的方法

/** * 获取应用MD5 * @author YOLANDA * @param context * @return */public static String getAPKMD5(Context context) {String md5 = "";String path = context.getApplicationContext().getPackageResourcePath();File file = new File(path);try {md5 = StringUtil.getFileMD5String(file);} catch (Exception e) {e.printStackTrace();}return md5;}

/** * 获取文件MD5 * @author YOLANDA * @param file * @return * @throws Exception */public static String getFileMD5String(File file) throws Exception {InputStream fis;MessageDigest messagedigest = MessageDigest.getInstance("MD5");fis = new FileInputStream(file);byte[] buffer = new byte[1024];int numRead = 0;while ((numRead = fis.read(buffer)) > 0) {messagedigest.update(buffer, 0, numRead);}fis.close();return byte2Hex(messagedigest.digest());}

/** * byte[]转Hex字符串 * @author YOLANDA * @param b * @return */public static String byte2Hex(byte[] b) {if (null == b)return null;StringBuffer sBuffer = new StringBuffer();String sTmep;for (int i = 0; i < b.length; i++) {sTmep = Integer.toHexString(b[i] & 0xFF);if (sTmep.length() == 1)sBuffer.append("0");sBuffer.append(sTmep.toUpperCase(Locale.getDefault()));}return sBuffer.toString();}

String转hex 16进制，hex16进制转String可以去看我另一片博文： http://blog.csdn.net/yanzhenjie1003/article/details/44887649

byte转hex16进制，hex16进制转byte去看：http://blog.csdn.net/yanzhenjie1003/article/details/44887621

int转hex 16进制，hex 16进制转int看：http://blog.csdn.net/yanzhenjie1003/article/details/44886931

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