Android java.lang.NoClassDefFoundError导致KitKat设备上的应用程序崩溃：java.nio.charset.StandardCharset

我在它发生的地方使用的代码

  Caused by java.lang.NoClassDefFoundError: java.nio.charset.StandardCharsets
   common.HMACSha1Util.sha1 + 66(HMACSha1Util.java:66)
   network.NetHTTPConnection.postSecureRequest + 122(NetHTTPConnection.java:122)
   NetHTTPConnection.httpPostRequest + 62(NetHTTPConnection.java:62)
   network.AppNetworkController$1.onBackgoundProcess + 68(AppNetworkController.java:68)
   at network.AppNetworkController$AsyncRequest.doInBackground + 137(AppNetworkController.java:137)
   at network.AppNetworkController$AsyncRequest.doInBackground + 125(AppNetworkController.java:125)
   at android.os.AsyncTask$2.call + 287(AsyncTask.java:287)
   at java.util.concurrent.FutureTask.run + 234(FutureTask.java:234)
   at android.os.AsyncTask$SerialExecutor$1.run + 230(AsyncTask.java:230)
   at java.util.concurrent.ThreadPoolExecutor.runWorker + 1080(ThreadPoolExecutor.java:1080)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run + 573(ThreadPoolExecutor.java:573)
   at java.lang.Thread.run + 841(Thread.java:841)

公共静态字符串sha1（映射nvps）{
试一试{
//从原始密钥字节中获取hmac_sha1密钥
byte[]keyBytes=AppProperties.VERIFICATION\u KEY
.getBytes（）；
SecretKeySpec signingKey=新的SecretKeySpec（keyBytes，“HmacSHA1”）；
//获取hmac_sha1 Mac实例并使用签名密钥初始化
Mac Mac=Mac.getInstance（“HmacSHA1”）；
mac.init（签名密钥）；
//根据输入数据字节计算hmac
字节[]rawHmac=mac.doFinal（getStringFromMap（nvps）
.getBytes（））；
//将原始字节转换为十六进制
字节[]hexBytes=新的十六进制（）.encode（rawHmac）；
//将十六进制字节数组转换为字符串
返回新字符串（hexBytes，StandardCharsets.UTF_8）；
}捕获（例外e）{
}
}

返回新字符串时出错（十六字节，StandardCharsets.UTF_8）

---

我知道StandardCharset在Kikat中不可用，但需要帮助我如何更改它应在kitkat设备中工作以避免使用

StandardCharset

      public static String sha1(Map<String,String> nvps) {

        try {
        // Get an hmac_sha1 key from the raw key bytes
        byte[] keyBytes = AppProperties.VERIFICATION_KEY
                .getBytes();
        SecretKeySpec signingKey = new SecretKeySpec(keyBytes, "HmacSHA1");

        // Get an hmac_sha1 Mac instance and initialize with the signing key
        Mac mac = Mac.getInstance("HmacSHA1");
        mac.init(signingKey);

        // Compute the hmac on input data bytes
        byte[] rawHmac = mac.doFinal(getStringFromMap(nvps)
                .getBytes());

        // Convert raw bytes to Hex
        byte[] hexBytes = new Hex().encode(rawHmac);

        // Covert array of Hex bytes to a String
        return new String(hexBytes, StandardCharsets.UTF_8);
    } catch (Exception e) {

    }
}

---

要避免

标准字符集

使用

      public static String sha1(Map<String,String> nvps) {

        try {
        // Get an hmac_sha1 key from the raw key bytes
        byte[] keyBytes = AppProperties.VERIFICATION_KEY
                .getBytes();
        SecretKeySpec signingKey = new SecretKeySpec(keyBytes, "HmacSHA1");

        // Get an hmac_sha1 Mac instance and initialize with the signing key
        Mac mac = Mac.getInstance("HmacSHA1");
        mac.init(signingKey);

        // Compute the hmac on input data bytes
        byte[] rawHmac = mac.doFinal(getStringFromMap(nvps)
                .getBytes());

        // Convert raw bytes to Hex
        byte[] hexBytes = new Hex().encode(rawHmac);

        // Covert array of Hex bytes to a String
        return new String(hexBytes, StandardCharsets.UTF_8);
    } catch (Exception e) {

    }
}