我正在开发一个使用 3rd 方应用程序 Facebook 的黑莓应用程序。
现在，我的问题是，当我第一次发布消息时，我将被重定向到 Facebook 登录屏幕并发布消息。但是一旦我从我的应用程序注销并再次登录以将消息发布到 facebook，它会直接发布消息而不询问凭证信息。
登录facebook的以下代码：
public class FacebookMain implements ActionListener{// extends MainScreen implements ActionListener {
// Constants
public final static String NEXT_URL = "http://www.facebook.com/connect/login_success.html";
public final static String APPLICATION_ID ="261890490596037";
private final static long persistentObjectId = 0x854d1b7fa43e3577L;
//APPLICATION SECRET ID="f7e096af696ef81e72268f49a6381a8d"
static final String ACTION_ENTER = "updateStatus";
static final String ACTION_SUCCESS = "statusUpdated";
static final String ACTION_ERROR = "error";
private ActionScreen actionScreen;
private PersistentObject store;
private LoginScreen loginScreen;
private LogoutScreen logoutScreen;
private HomeScreen homeScreen;
private UpdateStatusScreen updateStatusScreen;
private RecentUpdatesScreen recentUpdatesScreen;
private UploadPhotoScreen uploadPhotoScreen;
private FriendsListScreen friendsListScreen;
private PokeFriendScreen pokeFriendScreen;
private PostWallScreen postWallScreen;
private SendMessageScreen sendMessageScreen;
private String postMessage;
private FacebookContext fbc;
public static boolean isWallPosted=false;
public FacebookMain(String postMessge) {
this.postMessage=postMessge;
checkPermissions();
init();
if ((fbc != null) && fbc.hasValidAccessToken()) {
/*homeScreen = new HomeScreen(fbc);
homeScreen.addActionListener(this);
UiApplication.getUiApplication().pushScreen(homeScreen);*/
try {
new FBUser("me", fbc.getAccessToken()).setStatus(postMessage);
actionScreen=new ActionScreen();
actionScreen.fireAction(ACTION_SUCCESS);
Dialog.alert("Wall Posted ");
isWallPosted=true;
//UiApplication.getUiApplication().popScreen(loginScreen);
} catch (Exception e) {
actionScreen.fireAction(ACTION_ERROR, e.getMessage());
//UiApplication.getUiApplication().popScreen(loginScreen);
}
} else {
loginScreen = new LoginScreen(fbc,postMessge);
loginScreen.addActionListener(this);
UiApplication.getUiApplication().pushScreen(loginScreen);
}
}
private void init() {
store = PersistentStore.getPersistentObject(persistentObjectId);
synchronized (store) {
if (store.getContents() == null) {
store.setContents(new FacebookContext(NEXT_URL, APPLICATION_ID));
store.commit();
}
}
fbc = (FacebookContext) store.getContents();
}
private void checkPermissions() {
ApplicationPermissionsManager apm = ApplicationPermissionsManager.getInstance();
ApplicationPermissions original = apm.getApplicationPermissions();
if ((original.getPermission(ApplicationPermissions.PERMISSION_INPUT_SIMULATION) == ApplicationPermissions.VALUE_ALLOW) && (original.getPermission(ApplicationPermissions.PERMISSION_DEVICE_SETTINGS) == ApplicationPermissions.VALUE_ALLOW) && (original.getPermission(ApplicationPermissions.PERMISSION_CROSS_APPLICATION_COMMUNICATION) == ApplicationPermissions.VALUE_ALLOW) && (original.getPermission(ApplicationPermissions.PERMISSION_INTERNET) == ApplicationPermissions.VALUE_ALLOW) && (original.getPermission(ApplicationPermissions.PERMISSION_SERVER_NETWORK) == ApplicationPermissions.VALUE_ALLOW) && (original.getPermission(ApplicationPermissions.PERMISSION_EMAIL) == ApplicationPermissions.VALUE_ALLOW)) {
return;
}
ApplicationPermissions permRequest = new ApplicationPermissions();
permRequest.addPermission(ApplicationPermissions.PERMISSION_INPUT_SIMULATION);
permRequest.addPermission(ApplicationPermissions.PERMISSION_DEVICE_SETTINGS);
permRequest.addPermission(ApplicationPermissions.PERMISSION_CROSS_APPLICATION_COMMUNICATION);
permRequest.addPermission(ApplicationPermissions.PERMISSION_INTERNET);
permRequest.addPermission(ApplicationPermissions.PERMISSION_SERVER_NETWORK);
permRequest.addPermission(ApplicationPermissions.PERMISSION_EMAIL);
permRequest.addPermission(ApplicationPermissions.PERMISSION_INTERNET);
permRequest.addPermission(ApplicationPermissions.PERMISSION_AUTHENTICATOR_API);
permRequest.addPermission(ApplicationPermissions.PERMISSION_SERVER_NETWORK);
permRequest.addPermission(ApplicationPermissions.PERMISSION_WIFI);
boolean acceptance = ApplicationPermissionsManager.getInstance().invokePermissionsRequest(permRequest);
if (acceptance) {
// User has accepted all of the permissions.
return;
} else {
}
}
public void saveContext(FacebookContext pfbc) {
synchronized (store) {
store.setContents(pfbc);
System.out.println(pfbc);
store.commit();
}
}
public void logoutAndExit() {
saveContext(null);
logoutScreen = new LogoutScreen(fbc);
logoutScreen.addActionListener(this);
}
public void saveAndExit() {
saveContext(fbc);
exit();
}
private void exit() {
AppenderFactory.close();
System.exit(0);
}
public void onAction(Action event) {/*
if (event.getSource() == loginScreen) {
if (event.getAction().equals(LoginScreen.ACTION_LOGGED_IN)) {
try {
fbc.setAccessToken((String) event.getData());
try {
new FBUser("me", fbc.getAccessToken()).setStatus(postMessage);
actionScreen=new ActionScreen();
actionScreen.fireAction(ACTION_SUCCESS);
Dialog.alert("Wall Posted ");
} catch (Exception e) {
actionScreen.fireAction(ACTION_ERROR, e.getMessage());
}
try {
if (homeScreen == null) {
homeScreen = new HomeScreen(fbc);
homeScreen.addActionListener(this);
}
UiApplication.getUiApplication().pushScreen(homeScreen);
} catch (Exception e) {
e.printStackTrace();
Dialog.alert("Error: " + e.getMessage());
}
} catch (Throwable t) {
t.printStackTrace();
Dialog.alert("Error: " + t.getMessage());
}
} else if (event.getAction().equals(LoginScreen.ACTION_ERROR)) {
Dialog.alert("Error: " + event.getData());
}
} else if (event.getSource() == logoutScreen) {
if (event.getAction().equals(LogoutScreen.ACTION_LOGGED_OUT)) {
exit();
}
} else if (event.getSource() == homeScreen) {
if (event.getAction().equals(UpdateStatusScreen.ACTION_ENTER)) {
if (updateStatusScreen == null) {
updateStatusScreen = new UpdateStatusScreen(fbc);
updateStatusScreen.addActionListener(this);
}
UiApplication.getUiApplication().pushScreen(updateStatusScreen);
try {
new FBUser("me", fbc.getAccessToken()).setStatus("");
actionScreen=new ActionScreen();
actionScreen.fireAction(ACTION_SUCCESS);
} catch (Exception e) {
actionScreen.fireAction(ACTION_ERROR, e.getMessage());
}
} else if (event.getAction().equals(RecentUpdatesScreen.ACTION_ENTER)) {
if (recentUpdatesScreen == null) {
recentUpdatesScreen = new RecentUpdatesScreen(fbc);
recentUpdatesScreen.addActionListener(this);
}
recentUpdatesScreen.loadList();
UiApplication.getUiApplication().pushScreen(recentUpdatesScreen);
} else if (event.getAction().equals(UploadPhotoScreen.ACTION_ENTER)) {
if (uploadPhotoScreen == null) {
uploadPhotoScreen = new UploadPhotoScreen(fbc);
uploadPhotoScreen.addActionListener(this);
}
UiApplication.getUiApplication().pushScreen(uploadPhotoScreen);
} else if (event.getAction().equals(FriendsListScreen.ACTION_ENTER)) {
if (friendsListScreen == null) {
friendsListScreen = new FriendsListScreen(fbc);
friendsListScreen.addActionListener(this);
}
friendsListScreen.loadList();
UiApplication.getUiApplication().pushScreen(friendsListScreen);
} else if (event.getAction().equals(PokeFriendScreen.ACTION_ENTER)) {
if (pokeFriendScreen == null) {
pokeFriendScreen = new PokeFriendScreen(fbc);
pokeFriendScreen.addActionListener(this);
}
UiApplication.getUiApplication().pushScreen(pokeFriendScreen);
} else if (event.getAction().equals(PostWallScreen.ACTION_ENTER)) {
if (postWallScreen == null) {
postWallScreen = new PostWallScreen(fbc);
postWallScreen.addActionListener(this);
}
postWallScreen.loadList();
UiApplication.getUiApplication().pushScreen(postWallScreen);
} else if (event.getAction().equals(SendMessageScreen.ACTION_ENTER)) {
if (sendMessageScreen == null) {
sendMessageScreen = new SendMessageScreen(fbc);
sendMessageScreen.addActionListener(this);
}
UiApplication.getUiApplication().pushScreen(sendMessageScreen);
}
} else if (event.getSource() == updateStatusScreen) {
if (event.getAction().equals(UpdateStatusScreen.ACTION_SUCCESS)) {
Dialog.inform("Status updated");
try {
UiApplication.getUiApplication().popScreen(updateStatusScreen);
} catch (IllegalArgumentException e) {
}
} else if (event.getAction().equals(UpdateStatusScreen.ACTION_SUCCESS)) {
Dialog.alert("Error: " + event.getData());
}
} else if (event.getSource() == recentUpdatesScreen) {
if (event.getAction().equals(RecentUpdatesScreen.ACTION_SUCCESS)) {
try {
UiApplication.getUiApplication().popScreen(recentUpdatesScreen);
} catch (IllegalArgumentException e) {
}
} else if (event.getAction().equals(RecentUpdatesScreen.ACTION_ERROR)) {
Dialog.alert("Error: " + event.getData());
}
} else if (event.getSource() == uploadPhotoScreen) {
if (event.getAction().equals(UploadPhotoScreen.ACTION_SUCCESS)) {
try {
UiApplication.getUiApplication().popScreen(uploadPhotoScreen);
} catch (IllegalArgumentException e) {
}
} else if (event.getAction().equals(UploadPhotoScreen.ACTION_ERROR)) {
Dialog.alert("Error: " + event.getData());
}
} else if (event.getSource() == friendsListScreen) {
if (event.getAction().equals(FriendsListScreen.ACTION_SUCCESS)) {
try {
UiApplication.getUiApplication().popScreen(friendsListScreen);
} catch (IllegalArgumentException e) {
}
} else if (event.getAction().equals(FriendsListScreen.ACTION_ERROR)) {
Dialog.alert("Error: " + event.getData());
}
} else if (event.getSource() == pokeFriendScreen) {
if (event.getAction().equals(PokeFriendScreen.ACTION_SUCCESS)) {
try {
UiApplication.getUiApplication().popScreen(pokeFriendScreen);
} catch (IllegalArgumentException e) {
}
} else if (event.getAction().equals(PokeFriendScreen.ACTION_ERROR)) {
Dialog.alert("Error: " + event.getData());
}
} else if (event.getSource() == postWallScreen) {
if (event.getAction().equals(PostWallScreen.ACTION_SUCCESS)) {
Dialog.inform("Wall posted");
try {
UiApplication.getUiApplication().popScreen(postWallScreen);
} catch (IllegalArgumentException e) {
}
} else if (event.getAction().equals(PostWallScreen.ACTION_ERROR)) {
Dialog.alert("Error: " + event.getData());
}
} else if (event.getSource() == sendMessageScreen) {
if (event.getAction().equals(SendMessageScreen.ACTION_SUCCESS)) {
try {
UiApplication.getUiApplication().popScreen(sendMessageScreen);
} catch (IllegalArgumentException e) {
}
} else if (event.getAction().equals(SendMessageScreen.ACTION_ERROR)) {
Dialog.alert("Error: " + event.getData());
}
}
*/}
}
和下面的代码来清除凭证
public void logoutAndExit() {
saveContext(null);
logoutScreen = new LogoutScreen(fbc);
logoutScreen.addActionListener(this);
}