Codename one FacebookConnect

Question

我目前正在尝试使用Codename One进行跨平台移动应用程序开发，该应用程序需要社交登录。我试图介绍Facebook登录，但它不起作用。我可能做错了什么？

下面是我的代码得来的错误：

public class MyApplication { 

    private Form current; 
    private Resources theme; 
    private String tokenPrefix; 
    private String fullName; 
    private String uniqueId; 
    private String imageURL; 
    private static EncodedImage userPlaceholder; 
    private EncodedImage roundPlaceholder; 

    public void start() { 
     if (current != null) { 
      current.show(); 
      return; 
     } 

     Form facebook = new Form(new BorderLayout(BorderLayout.CENTER_BEHAVIOR_CENTER)); 
     facebook.getTitleArea().setUIID("Container"); 

     Button connect = new Button("Login with facebook"); 

     Container c = BoxLayout.encloseY(connect); 

     facebook.add(BorderLayout.CENTER, c); 

     connect.addActionListener((evt) -> { 
      /* tokenPrefix = "facebook"; 
       Login fb = FacebookConnect.getInstance(); 
       fb.setClientId("XXXXXXXXXXXXXXXXX"); 
       fb.setRedirectURI("http://localhost/callback"); 
       fb.setClientSecret("xxxxxxxxxxxxxxxxxxxxxxxxxxxxx"); 
       doLogin(fb, new FacebookData(), false); */ 
      String clientId = "XXXXXXXXXXXXXXXXX"; 
      String redirectURI = "http://www.codenameone.com/"; 
      String clientSecret = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxx"; 
      Login fb = FacebookConnect.getInstance(); 
      fb.setClientId(clientId); 
      fb.setRedirectURI(redirectURI); 
      fb.setClientSecret(clientSecret); 
      Log.p("login event triggered"); 
      doLogin(fb, new FacebookData(), false); 
      /* if(!fb.isUserLoggedIn()){ 
         doLogin(fb, new FacebookData(),false); 
        }else{ 
         //get the token and now you can query the facebook API 
         String token = fb.getAccessToken().getToken(); 
             } */ 
     }); 

     facebook.show(); 
    } 

    void doLogin(Login lg, UserData data, boolean forceLogin) { 
     if (!forceLogin) { 
      if (lg.isUserLoggedIn()) { 
       Log.p("Fetching data......"); 
       showContactsForm(); 
       return; 
      } 

      String t = Preferences.get(tokenPrefix + "token", (String) null); 
      if (t != null) { 
       long tokenExpires = Preferences.get(tokenPrefix + "tokenExpires", (long) -1); 

       if (tokenExpires < 0 || tokenExpires > System.currentTimeMillis()) { 
        //we are still logged in 
        Log.p("Fetching data......"); 
        showContactsForm(); 
        return; 
       } 
      } 
     } 
     lg.setCallback(new LoginCallback() { 
      public void loginFailed(String errorMessage) { 
       Log.p("Error occured"); 
       Dialog.show("Error Logging in", "There was an error logging in:" + errorMessage, "OK", null); 
      } 

      public void loginSuccessful() { 
       Log.p("doLogin started"); 
       // when login is successful we fetch the full data 
       data.fetchData(lg.getAccessToken().getToken(),() -> { 
        // we store the values of result into local variables 
        String uniqueId = data.getId(); 
        String fullName = data.getName(); 
        String imageURL = data.getImage(); 

        // we then store the data into local cached storage so they will be around when we run the app next time 
        Preferences.set("fullName", fullName); 
        Preferences.set("uniqueId", uniqueId); 
        Preferences.set("imageURL", imageURL); 
        Preferences.set(tokenPrefix + "token", lg.getAccessToken().getToken()); 

        // token expiration is in seconds from the current time, we convert it to a System.currentTimeMillis value so we can 
        // reference it in the future to check expiration 
        Preferences.set(tokenPrefix + "tokenExpires", tokenExpirationInMillis(lg.getAccessToken())); 
        showContactsForm(); 
        Log.p("information fetched" + fullName + "_" + uniqueId + "_"); 
       }); 
      } 
     }); 
     lg.doLogin(); 
    } 

    long tokenExpirationInMillis(AccessToken token) { 
     String expires = token.getExpires(); 
     if (expires != null && expires.length() > 0) { 
      try { 
       // when it will expire in seconds 
       long l = (long) (Float.parseFloat(expires) * 1000); 
       return System.currentTimeMillis() + l; 
      } catch (NumberFormatException err) { 
       // ignore invalid input 
      } 
     } 
     return -1; 
    } 

    static interface UserData { 

     public String getName(); 

     public String getId(); 

     public String getImage(); 

     public void fetchData(String token, Runnable callback); 
     // public ContactData[] getContacts(); 
    } 

    class FacebookData implements UserData { 

     String name; 
     String id; 
     String token; 

     @Override 
     public String getName() { 
      return name; 
     } 

     @Override 
     public String getId() { 
      return id; 
     } 

     @Override 
     public String getImage() { 
      return "http://graph.facebook.com/v2.8/" + id + "/picture"; 
     } 

     @Override 
     public void fetchData(String token, Runnable callback) { 
      this.token = token; 
      ConnectionRequest req = new ConnectionRequest() { 
       @Override 
       protected void readResponse(InputStream input) throws IOException { 
        JSONParser parser = new JSONParser(); 
        Map<String, Object> parsed = parser.parseJSON(new InputStreamReader(input, "UTF-8")); 
        name = (String) parsed.get("name"); 
        id = (String) parsed.get("id"); 
       } 

       @Override 
       protected void postResponse() { 
        callback.run(); 
       } 

       @Override 
       protected void handleErrorResponseCode(int code, String message) { 
        //access token not valid anymore 
        if (code >= 400 && code <= 410) { 
         Log.p("error occured"); 
         doLogin(FacebookConnect.getInstance(), FacebookData.this, true); 
         return; 
        } 
        super.handleErrorResponseCode(code, message); 
       } 
      }; 
      req.setPost(false); 
      req.setUrl("https://graph.facebook.com/v2.8/me"); 
      req.addArgumentNoEncoding("access_token", token); 
      NetworkManager.getInstance().addToQueue(req); 
     } 
    } 

    void showContactsForm() { 

     Form result = new Form(new BorderLayout(BorderLayout.CENTER_BEHAVIOR_CENTER_ABSOLUTE)); 
     Label fname = new Label("Hello"); 
     Label id = new Label("Facebook"); 

     Container c = BoxLayout.encloseY(fname, id); 

     fname.setText(Preferences.get("fullName", fullName)); 
     id.setText(Preferences.get("uniqueId", uniqueId)); 

     result.add(BorderLayout.CENTER, c); 
     result.show(); 
    } 
} 

Answer 1

首先，确保你的Facebook登录的设置正确的Facebook开发者控制台。

下面是你得到的所有信息，你需要：

注意本线req.addArgumentNoEncoding("fields", "id,email,name,first_name,last_name,gender,age_range,picture.width(512).height(512),locale,link,timezone,updated_time");的，这就是我们说的Facebook，我们需要什么信息

我用对话框检查输出processFacebookLogin()用于调试目的而不是showContact()

void doLogin(Login lg, UserData data, boolean forceLogin) { 
    if (!forceLogin) { 
     if (lg.isUserLoggedIn()) { 
      processFacebookLogin(data); 
      return; 
     } 

     // if the user already logged in previously and we have a token 
     String token = Preferences.get(tokenPrefix + "token", (String) null); 
     if (getToolbar() != null) { 
      // we check the expiration of the token which we previously stored as System time 
      long tokenExpires = Preferences.get(tokenPrefix + "tokenExpires", (long) -1); 
      if (tokenExpires < 0 || tokenExpires > System.currentTimeMillis()) { 

       data.fetchData(token,() -> { 
        processFacebookLogin(data); 
       }); 
       return; 
      } 
     } 
    } 

    lg.setCallback(new LoginCallback() { 
     @Override 
     public void loginFailed(String errorMessage) { 
      Dialog.show("Error Logging In", "There was an error logging in with Facebook: " + errorMessage, "Ok", null); 
     } 

     @Override 
     public void loginSuccessful() { 
      data.fetchData(lg.getAccessToken().getToken(),() -> { 
       Preferences.set(tokenPrefix + "token", lg.getAccessToken().getToken()); 
       Preferences.set(tokenPrefix + "tokenExpires", tokenExpirationInMillis(lg.getAccessToken())); 
       processFacebookLogin(data); 
      }); 
     } 
    }); 
    lg.doLogin(); 
} 

long tokenExpirationInMillis(AccessToken token) { 
    String expires = token.getExpires(); 
    if (expires != null && expires.length() > 0) { 
     try { 
      // when it will expire in seconds 
      long l = (long) (Float.parseFloat(expires) * 1000); 
      return System.currentTimeMillis() + l; 
     } catch (NumberFormatException err) { 
      // ignore invalid input 
     } 
    } 
    return -1; 
} 


class FacebookData implements UserData { 

    String id; 
    String email; 
    String name; 
    String first_name; 
    String last_name; 
    String image; 
    String link; 
    String gender; 
    String locale; 
    Double timezone; 
    String updated_time; 
    String verified; 

    @Override 
    public String getId() { 
     return id; 
    } 

    @Override 
    public String getEmail() { 
     return email; 
    } 

    @Override 
    public String getFullName() { 
     return name; 
    } 

    @Override 
    public String getFirstName() { 
     return first_name; 
    } 

    @Override 
    public String getLastName() { 
     return last_name; 
    } 

    @Override 
    public String getGender() { 
     return gender; 
    } 

    @Override 
    public String getLink() { 
     return link; 
    } 

    @Override 
    public String getLocale() { 
     return locale; 
    } 

    @Override 
    public Double getTimezone() { 
     return timezone; 
    } 

    @Override 
    public String getUpdatedTime() { 
     return updated_time; 
    } 

    @Override 
    public String getImage() { 
     return image; 
    } 

    @Override 
    public void fetchData(String token, Runnable callback) { 
     ConnectionRequest req = new ConnectionRequest() { 
      @Override 
      protected void readResponse(InputStream input) throws IOException { 
       JSONParser parser = new JSONParser(); 
       Map<String, Object> parsed = parser.parseJSON(new InputStreamReader(input, "UTF-8")); 
       id = (String) parsed.get("id"); 
       email = (String) parsed.get("email"); 
       name = (String) parsed.get("name"); 
       first_name = (String) parsed.get("first_name"); 
       last_name = (String) parsed.get("last_name"); 
       link = (String) parsed.get("link"); 
       gender = (String) parsed.get("gender"); 
       locale = (String) parsed.get("locale"); 
       timezone = (Double) parsed.get("timezone"); 
       updated_time = (String) parsed.get("updated_time;"); 
       verified = (String) parsed.get("verified"); 
       image = (String) ((Map) ((Map) parsed.get("picture")).get("data")).get("url").toString(); 
      } 

      @Override 
      protected void postResponse() { 
       callback.run(); 
      } 

      @Override 
      protected void handleErrorResponseCode(int code, String message) { 
       //access token not valid anymore 
       if (code >= 400 && code <= 410) { 
        doLogin(FacebookConnect.getInstance(), FacebookData.this, true); 
        return; 
       } 
       super.handleErrorResponseCode(code, message); 
      } 
     }; 
     req.setPost(false); 
     req.setUrl("https://graph.facebook.com/v2.8/me"); 
     req.addArgumentNoEncoding("access_token", token); 
     req.addArgumentNoEncoding("fields", "id,email,name,first_name,last_name,gender,age_range,picture.width(512).height(512),locale,link,timezone,updated_time"); 
     NetworkManager.getInstance().addToQueue(req); 
    } 
}