无法在android应用程序上获得对Amazon alexa的授权令牌访问权

我创建了一个安全配置文件，并从中获得了密码挑战

@文卡特什：

生成codeVerifier和codeChallenge：

String codeVerifier = generateCodeVerifier();
String codeChallenge = generateCodeChallenge(codeVerifier, "S256");







 private String generateCodeVerifier() {
                String randomOctetSequence = generateRandomOctetSequence(100);
                String codeVerifier = base64UrlEncode(randomOctetSequence.getBytes());
                return codeVerifier;
            }

            private String generateRandomOctetSequence(int count) {
                char[] chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890-_.~".toCharArray();
                StringBuilder sb = new StringBuilder();
                Random random = new Random();
                for (int i = 0; i < count; i++) {
                    char c = chars[random.nextInt(chars.length)];
                    sb.append(c);
                }
                return sb.toString();
            }

    private String generateCodeChallenge(String codeVerifier, String codeChallengeMethod) {
                String codeChallenge = "";
                if ("S256".equalsIgnoreCase(codeChallengeMethod)) {
                    try {
                        byte[] digest = MessageDigest.getInstance("SHA-256").digest(
                                codeVerifier.getBytes());
                        codeChallenge = base64UrlEncode(
                                digest);
                    } catch (NoSuchAlgorithmException e) {
                        e.printStackTrace();
                    }
                } else {
                    // Fall back to code_challenge_method = "plain" codeChallenge = codeVerifier;
                }
                return codeChallenge;
            }

    private String base64UrlEncode(byte[] arg) {
                String s = new String(Base64.encode(arg, Base64.URL_SAFE | Base64.NO_PADDING | Base64.NO_WRAP));
                s = s.split("=")[0]; // Remove any trailing '='s
                s = s.replace('+', '-'); // 62nd char of encoding
                s = s.replace('/', '_'); // 63rd char of encoding
                return s;
            }

String codeVerifier=generateCodeVerifier（）；
字符串codeChallenge=generateCodeChallenge（代码验证器，“S256”）；
私有字符串generateCodeVerifier（）{
String randomOctetSequence=generateRandomOctetSequence（100）；
String codeVerifier=base64UrlEncode（randomOctetSequence.getBytes（））；
返回码校验器；
}
专用字符串生成器DomOcteTSequence（int计数）{
char[]chars=“abcdefghijklmnopqrstuvxyzabcdefghijklmnopqrstuvxyz1234567890-。~”.tocharray（）；
StringBuilder sb=新的StringBuilder（）；
随机=新随机（）；
for（int i=0；i

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请看我的评论（来源）：

欢迎链接到解决方案，但请确保您的答案在没有它的情况下是有用的：这样您的其他用户就会知道它是什么以及为什么存在，然后引用您链接到的页面的最相关部分，以防目标页面不可用。

06-23 18:31:02.496 29161-29523/gct.venkatesh.com.alexabot I/com.amazon.identity.auth.device.authorization.AuthorizationHelper: Return auth code success 
06-23 18:31:02.500 29161-29523/gct.venkatesh.com.alexabot D/AmazonLoginActivity: success ANkBjQgTSnsVwfcQCqrU amzn://gct.venkatesh.com.alexabot amzn1.application-oa2-client.bd04c0584c0c4a1296bf3c1f14f9a831 
06-23 18:31:02.611 29161-29161/gct.venkatesh.com.alexabot I/Timeline: Timeline: Activity_idle id: android.os.BinderProxy@1496318b time:21809219 
06-23 18:31:04.543 29161-29523/gct.venkatesh.com.alexabot I/System.out: Key : Server ,Value : Server 
06-23 18:31:04.544 29161-29523/gct.venkatesh.com.alexabot I/System.out: Key : Date ,Value : Fri, 23 Jun 2017 13:00:42 GMT 
06-23 18:31:04.544 29161-29523/gct.venkatesh.com.alexabot I/System.out: Key : Content-Type ,Value : application/json 
06-23 18:31:04.544 29161-29523/gct.venkatesh.com.alexabot I/System.out: Key : Content-Length ,Value : 92 
06-23 18:31:04.544 29161-29523/gct.venkatesh.com.alexabot I/System.out: Key : Connection ,Value : keep-alive 
06-23 18:31:04.544 29161-29523/gct.venkatesh.com.alexabot I/System.out: Key : x-amzn-RequestId ,Value : f6f231ed-5813-11e7-88b7-1d51a9cde1df 
06-23 18:31:04.544 29161-29523/gct.venkatesh.com.alexabot I/System.out: Key : X-Amz-Date ,Value : Fri, 23 Jun 2017 13:00:42 GMT 
06-23 18:31:04.544 29161-29523/gct.venkatesh.com.alexabot I/System.out: Key : x-amzn-ErrorType ,Value : OA2UnauthorizedClientException:http://internal.amazon.com/coral/com.amazon.panda/ 
06-23 18:31:04.544 29161-29523/gct.venkatesh.com.alexabot I/System.out: Key : Cache-Control ,Value : no-cache, no-store, must-revalidate 
06-23 18:31:04.544 29161-29523/gct.venkatesh.com.alexabot I/System.out: Key : Pragma ,Value : no-cache 
06-23 18:31:04.544 29161-29523/gct.venkatesh.com.alexabot I/System.out: Key : Vary ,Value : Accept-Encoding,User-Agent 
06-23 18:31:04.544 29161-29523/gct.venkatesh.com.alexabot D/Response: {"error_description":"Not authorized for requested operation","error":"unauthorized_client"

String codeVerifier = generateCodeVerifier();
String codeChallenge = generateCodeChallenge(codeVerifier, "S256");







 private String generateCodeVerifier() {
                String randomOctetSequence = generateRandomOctetSequence(100);
                String codeVerifier = base64UrlEncode(randomOctetSequence.getBytes());
                return codeVerifier;
            }

            private String generateRandomOctetSequence(int count) {
                char[] chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890-_.~".toCharArray();
                StringBuilder sb = new StringBuilder();
                Random random = new Random();
                for (int i = 0; i < count; i++) {
                    char c = chars[random.nextInt(chars.length)];
                    sb.append(c);
                }
                return sb.toString();
            }

    private String generateCodeChallenge(String codeVerifier, String codeChallengeMethod) {
                String codeChallenge = "";
                if ("S256".equalsIgnoreCase(codeChallengeMethod)) {
                    try {
                        byte[] digest = MessageDigest.getInstance("SHA-256").digest(
                                codeVerifier.getBytes());
                        codeChallenge = base64UrlEncode(
                                digest);
                    } catch (NoSuchAlgorithmException e) {
                        e.printStackTrace();
                    }
                } else {
                    // Fall back to code_challenge_method = "plain" codeChallenge = codeVerifier;
                }
                return codeChallenge;
            }

    private String base64UrlEncode(byte[] arg) {
                String s = new String(Base64.encode(arg, Base64.URL_SAFE | Base64.NO_PADDING | Base64.NO_WRAP));
                s = s.split("=")[0]; // Remove any trailing '='s
                s = s.replace('+', '-'); // 62nd char of encoding
                s = s.replace('/', '_'); // 63rd char of encoding
                return s;
            }