PayPalAccessOpenIDConnectOAuth.java

getAccessToken-request-java

//download the complete java code sample from https://github.com/paypal/paypal-access

/**
* Gets Access token by going to token service. Code is left blank so that user can fill it up manually.
* 
* @return - Access token
*/
private static String getAccessToken(String authorizationCode) {
 StringBuilder tokenUrl = new StringBuilder(
 "https://api.paypal.com/v1/identity/openidconnect/tokenservice");
 tokenUrl.append("?grant_type=authorization_code");
 // code should be obtained manually and pasted here.
 tokenUrl.append("&code=" + authorizationCode);
 Map<String, Object> responseMap = getResponse(tokenUrl.toString(), "POST", "Basic " + getAuthorizationHeader());
 return (String) responseMap.get("access_token");
}

getAuthURL-request-java

//download the complete java code sample from https://github.com/paypal/paypal-access

/**
* Creates an authorization URL so that user can paste this in browser to get authorization code.
* 
* @return - Authorization URL
*/
private static String getAuthorizationUrl() {
 StringBuilder authUrl = new StringBuilder(
 "https://www.paypal.com/webapps/auth/protocol/openidconnect/v1/authorize");
 // all the below params should be changed according to your needs. Below values are just an example.
 authUrl.append("?client_id=<REPLACE ME>");
 authUrl.append("&response_type=code");
 authUrl.append("&scope=openid profile email address");
 authUrl.append("&nonce=" + createNonce());
 authUrl.append("&redirect_uri=<URL GIVEN WHILE REGISTERING THE APP>");
 return authUrl.toString();
}

getUserProfile-request-java

//download the complete java code sample from https://github.com/paypal/paypal-access

/**
* Gets user info based on <code>accesstoken</code> passed.
* 
* @param accessToken - Access token acquired via token service.
* @return - User Information map.
*/
private static Map<String, Object> getUserInfo(String accessToken) {
  StringBuilder userInfoUrl = new StringBuilder(
  "https://api.paypal.com/v1/identity/openidconnect/userinfo");
  userInfoUrl.append("?schema=openid");
  return getResponse(userInfoUrl.toString(), "GET", ("Bearer " + accessToken));
}

http://stackoverflow.com/questions/38910575/how-to-get-access-token-paypal-in-android i need help here