我正在尝试从Facebook获取数据，在执行时应用程序可以从Facebook获取数据，但是当我试图动态地将Facebook个人资料图片设置为用户图片时，它会抛出错误，我不知道是什么我的代码错了.. 以下是我的代码
Form facebook = new Form("Facebook", new BoxLayout(BoxLayout.Y_AXIS));
Toolbar tb = new Toolbar();
facebook.setToolbar(tb);
user = theme.getImage("user.png");
Label userLabel = new Label(user);
username = new Label("Visitor");
Button login = new Button("Login");
login.addActionListener((evt) -> {
String clientId = "158093724691158";
String redirectURI = "http://www.codenameone.com/";
String clientSecret = "eca942518c753053dd0adeff93ad78c3";
fb = FacebookConnect.getInstance();
fb.setClientId(clientId);
fb.setRedirectURI(redirectURI);
fb.setClientSecret(clientSecret);
Log.p("login event triggered");
doLogin(fb, new FacebookData(), false);
});
facebook.show();
}
void processFacebookLogin(UserData data){
Log.p("First NAme : " + data.getFirstName());
Log.p("Last Name : " + data.getLastName());
Log.p("Email : " + data.getEmail());
Log.p("Full Name : " + data.getFullName());
Log.p("Gender : " + data.getGender());
Log.p("Id : " + data.getId());
Log.p("Link : " +data.getLink());
Log.p("Locale : " +data.getLocale());
Log.p("Time-Zone : " +data.getTimezone());
Log.p("Pcture : " +data.getImage());
Log.p("Updated Time : " + data.getUpdatedTime());
Log.p("Story" + data.getStory());
username.setText(data.getFullName());
user = (EncodedImage) Image. createImage(data. getImage()) ; //here i am trying to set facebook user profile picture
}
void doLogin(Login lg, UserData data, boolean forceLogin) {
if (!forceLogin) {
if (lg.isUserLoggedIn()) {
processFacebookLogin(data);
new FacebookData();
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;
}
static interface UserData{
public String getId();
public String getEmail();
public String getFullName();
public String getFirstName();
public String getLastName();
public String getGender();
public String getLink();
public String getLocale();
public Double getTimezone();
public String getUpdatedTime();
public String getImage();
public String getStory();
public void fetchData(String token, Runnable callback);
}
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;
String story;
@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 String getStory() {
return story;
}
@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();
story = (String) ((Map) ((Map)parsed.get("posts")).get("data")).get("story").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); //this statement is used to patch access token with url
req.addArgumentNoEncoding("fields", "id,email,name,first_name,last_name,gender,age_range,picture.width(512).height(512),locale,link,timezone,updated_time,posts.limit(10)");
//above statement is used to provide permission through url so server send data with respect ot permissions.
NetworkManager.getInstance().addToQueue(req);
}
}
public void stop() {
current = Display.getInstance().getCurrent();
if(current instanceof Dialog) {
((Dialog)current).dispose();
current = Display.getInstance().getCurrent();
}
}
public void destroy() {
}
}
答案 0 :(得分：2)
您必须使用URLImage来解决这个问题：
更改此行：
user = (EncodedImage) Image. createImage(data. getImage()) ;
要
if (data.getImage() != null) {
EncodedImage encImage = EncodedImage.createFromImage(user.getIcon(), true);
Display.getInstance().callSerially(() -> {
user.setIcon(URLImage.createToStorage(encImage, data.getImage(), data.getImage(), null));
user.getComponentForm().repaint();
});
}