工作流程如下：
用户点击登录 - ＆gt;登录成功后 - >提示权限对话框，如果接受，登录，如果取消，下次再次打开该框
问题是，权限对话框第一次请求了电子邮件权限，但是，如果用户单击取消并稍后打开该框，则电子邮件权限似乎不再存在，它只是询问用户的个人信息。
如何解决这个问题？感谢
更新：我尝试修复代码，但是，它会抛出异常，它似乎与流逻辑有关。如何解决这个问题？我将提供我的代码的详细信息，感谢您的帮助。
修改：
添加了private final static List<String> PERMISSIONS = Arrays.asList("email");
更新onclickLogin（）
private void onClickLogin() {
Session session = Session.getActiveSession();
List<String> permissions = session.getPermissions();
Log.d("test1","p:" + permissions);
Log.d("test1","session open" + session.isOpened());
if (!session.isOpened() && !session.isClosed()) {
Log.d("test1","test1");
session.openForRead(new Session.OpenRequest(this).setPermissions("email").setCallback(statusCallback));
} else if(!isSubset(PERMISSIONS, permissions)) {
Log.d("test1","test2");
Session.NewPermissionsRequest newPermissions = new Session.NewPermissionsRequest(this, PERMISSIONS);
session.requestNewPublishPermissions(newPermissions);
} else {
Log.d("test1","test3");
Session.openActiveSession(getActivity(), this, true, statusCallback);
}
}
添加了isSubset（）
日志cat输出
03-09 14:30:29.301: D/test1(23828): p:[]
03-09 14:30:29.301: D/test1(23828): session openfalse
03-09 14:30:29.301: D/test1(23828): test1
03-09 14:30:42.654: D/test1(23828): p:[]
03-09 14:30:42.654: D/test1(23828): session openfalse
03-09 14:30:42.654: D/test1(23828): test2
例外
03-09 14:30:42.694: E/AndroidRuntime(23828): java.lang.UnsupportedOperationException: Session: an attempt was made to request new permissions for a session that has been closed.
注意：在点击取消并第二次打开该框后，似乎仍未打开会话，因此我删除了Session.isopened检查。否则它只会落入第三个条件
以下是Class的完整代码：
public class Home extends Fragment implements LoginListener {
private final static String TAG = "Home";
public View rootView;
public ImageView HomeBg;
public ImageView buttonLoginLogout;
public TextView chi;
public TextView eng;
public ColorStateList oldColor;
public SharedPreferences prefs;
public EasyTracker tracker = null;
public SharedPreferences.Editor editor;
public ProgressDialog pd;
public Home ctx;
//Facebook login
private Session.StatusCallback statusCallback = new SessionStatusCallback();
private final static List<String> PERMISSIONS = Arrays.asList("email");
@Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
ctx = this;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
try{
// fix for disable the hiding action bar animation
getActivity().getActionBar().getClass().getDeclaredMethod("setShowHideAnimationEnabled", boolean.class).invoke(getActivity().getActionBar(), false);
} catch (Exception exception){
// animation will be run if not support
}
getActivity().getActionBar().hide();
tracker = EasyTracker.getInstance(getActivity());
prefs = getActivity().getSharedPreferences("userInfo", 0);
editor = prefs.edit();
rootView = inflater.inflate(R.layout.home, container, false);
buttonLoginLogout = (ImageView) rootView.findViewById(R.id.home_connectFB);
eng = (TextView) rootView.findViewById(R.id.btn_eng);
chi = (TextView) rootView.findViewById(R.id.btn_chi);
eng.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View arg0) {
if (!Utility.getLocale(getActivity()).equals("en")) {
tracker.send(MapBuilder.createEvent("menu_click","language", "switchEN", null).build());
chi.setTextColor(oldColor);
eng.setTextColor(getActivity().getResources().getColor(android.R.color.white));
MyApp.updateLanguage(getActivity().getApplicationContext(), "en");
refreshAfterLocaleChanged("en");
}
}
});
chi.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View arg0) {
if (!Utility.getLocale(getActivity()).equals("zh")) {
tracker.send(MapBuilder.createEvent("menu_click","language", "switchTC", null).build());
eng.setTextColor(oldColor);
chi.setTextColor(getActivity().getResources().getColor(android.R.color.white));
MyApp.updateLanguage(getActivity().getApplicationContext(), "zh");
refreshAfterLocaleChanged("zh");
}
}
});
if (Utility.getLocale(getActivity()).equals("zh")) {
chi.setTextColor(getActivity().getResources().getColor(
android.R.color.white));
oldColor = eng.getTextColors();
} else {
eng.setTextColor(getActivity().getResources().getColor(
android.R.color.white));
oldColor = chi.getTextColors();
}
//Facebook login
Settings.addLoggingBehavior(LoggingBehavior.INCLUDE_ACCESS_TOKENS);
Session session = Session.getActiveSession();
if (session == null) {
if (savedInstanceState != null) {
session = Session.restoreSession(getActivity(), null, statusCallback, savedInstanceState);
}
if (session == null) {
session = new Session(getActivity());
}
Session.setActiveSession(session);
if (session.getState().equals(SessionState.CREATED_TOKEN_LOADED)) {
// session.openForRead(new Session.OpenRequest(this).setPermissions(Arrays.asList("basic_info","email")).setCallback(statusCallback));
session.openForRead(new Session.OpenRequest(this).setPermissions("email").setCallback(statusCallback));
}
}
updateView();
return rootView;
}
public void refreshAfterLocaleChanged(String lang){
SharedPreferences langPrefs = PreferenceManager.getDefaultSharedPreferences(getActivity().getApplicationContext());
Editor editor = langPrefs.edit();
editor.putString("lang",lang).commit();
Intent intent = getActivity().getIntent();
intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
getActivity().finish();
getActivity().overridePendingTransition(0, 0);
startActivity(intent);
}
@Override
public void onStart() {
super.onStart();
Session.getActiveSession().addCallback(statusCallback);
tracker.set(Fields.SCREEN_NAME, "hk7app/CX/" + Utility.getLocale(getActivity()) + "/Landing Page");
tracker.send(MapBuilder.createAppView().build());
}
@Override
public void onStop() {
super.onStop();
if (pd != null)
pd.dismiss();
Session.getActiveSession().removeCallback(statusCallback);
EasyTracker.getInstance(getActivity()).activityStop(getActivity());
}
@SuppressWarnings("deprecation")
private void updateView() {
Session session = Session.getActiveSession();
if (session.isOpened()) {
final String token = session.getAccessToken();
Request.executeMeRequestAsync(session, new Request.GraphUserCallback() {
@Override
public void onCompleted(GraphUser user,Response response) {
// TODO Auto-generated method stub
if (user != null) {
if (!user.getId().equals(prefs.getString("fbId",""))) {
editor.putString("fbId", user.getId());
editor.putString("fName", user.getFirstName());
editor.putString("lName", user.getLastName());
if (user.asMap() != null && user.asMap().get("email") != null) {
editor.putString("email", user.asMap().get("email").toString());
}
editor.commit();
}
if (prefs.getString("memId","").equals("") || prefs.getString("token","").equals("") || !user.getId().equals(prefs.getString("fbId",""))){
pd = ProgressDialog.show(getActivity(), getActivity().getResources().getString(R.string.sys_info),getActivity().getResources().getString(R.string.loading));
new APIHandler(getActivity(),tracker,"login",pd).execute(ctx,token);
} else {
onLoginComplete("","");
}
}
}
});
} else {
buttonLoginLogout.setImageResource(R.drawable.landing_btn_connect_facebook);
buttonLoginLogout.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) { onClickLogin(); }
});
}
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
Session.getActiveSession().onActivityResult(getActivity(), requestCode, resultCode, data);
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
Session session = Session.getActiveSession();
Session.saveSession(session, outState);
}
private void onClickLogin() {
tracker.send(MapBuilder.createEvent("menu_click","Fbconnect","connectFB_" + Utility.getLocale(getActivity()),null).build());
Session session = Session.getActiveSession();
List<String> permissions = session.getPermissions();// to get the session permissions
Log.d("test1","p:" + permissions);
Log.d("test1","session open" + session.isOpened());
if (!session.isOpened() && !session.isClosed()) {
Log.d("test1","test1");
session.openForRead(new Session.OpenRequest(this).setPermissions("email").setCallback(statusCallback));
} else if(!isSubset(PERMISSIONS, permissions)) {
Log.d("test1","test2");
Session.NewPermissionsRequest newPermissions = new Session.NewPermissionsRequest(this, PERMISSIONS);
session.requestNewPublishPermissions(newPermissions);
} else {
Log.d("test1","test3");
Session.openActiveSession(getActivity(), this, true, statusCallback);
}
}
//this function is to check if the user has a specific permission within the session
private boolean isSubset(Collection<String> subset, Collection<String> superset) {
for (String string : subset) {
if(!superset.contains(string))
return false;
}
return true;
}
private class SessionStatusCallback implements Session.StatusCallback {
@Override
public void call(Session session, SessionState state, Exception exception) {
Log.d(TAG,"SessionStatusCallback");
if (exception != null) {
Log.d(TAG,""+exception);
if (!session.isClosed()) {
session.closeAndClearTokenInformation(); //reset session
Session.setActiveSession(null);
}
if (exception instanceof FacebookAuthorizationException){
new AlertDialog.Builder(getActivity())
.setTitle(ctx.getResources().getString(R.string.sys_info))
.setMessage(R.string.facebook_permission_missing)
.setPositiveButton(ctx.getResources().getString(R.string.close), null)
.show();
}
} else {
updateView();
}
}
}
@Override
public void onResume() {
super.onResume();
AppEventsLogger.activateApp(getActivity(),getResources().getString(R.string.app_id));
}
@Override
public void onLoginComplete(String memberId, String token) {
if (pd != null)
pd.dismiss();
if (!memberId.equals("") && !token.equals("")) {
editor.putString("memId", memberId);
editor.putString("token", token);
editor.commit();
}
buttonLoginLogout.setImageResource(R.drawable.landing_btn_take_a_selfie);
buttonLoginLogout.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
tracker.send(MapBuilder.createEvent("menu_click","TakeSelfie","Selfie_now_" + Utility.getLocale(getActivity()),null).build());
((LandingPage)getActivity()).tabHost.setCurrentTab(2);
}
});
}
@Override
public void onLoginFailure(String errorMsg) {
if (pd != null)
pd.dismiss();
Toast.makeText(getActivity(), errorMsg, Toast.LENGTH_LONG).show();
}
}
答案 0 :(得分：1)
当然因为会话已经存在...所以会调用else ..你需要检查活动会话中是否存在权限..
添加以下内容：..
private final static List<String> PERMISSIONS = Arrays.asList("email");
然后在'onClickLogin'中添加if-else语句块..
List<String> permissions = session.getPermissions();// to get the session permissions
else if(session.isOpened() && !isSubset(PERMISSIONS, permissions) {
Session.NewPermissionsRequest newPermissions = new Session.NewPermissionsRequest(this, PERMISSIONS);
session.requestNewPublishPermissions(newPermissions);
}
isSubset函数
//this function is to check if the user has a specific permission within the session
private boolean isSubset(Collection<String> subset, Collection<String> superset) {
for (String string : subset) {
if(!superset.contains(string))
return false;
}
return true;
}
这是关于每次用户访问活动时如何显示消息的一般概念（如果您使用的是uiLifeCycleHelper），因此您仍需要对其进行更多修改以满足您的需求。
答案 1 :(得分：0)
当用户第一次按下权限上的取消按钮时，会话永远不会打开，会话也不会正常关闭。它会返回“CLOSED_LOGIN_FAILED”作为会话状态字段的值。您可以通过以下方式检查： session.getState（）的toString（）; 这就是为什么你的其他if块因某种原因无效的原因。 其次，当我执行newPermission语句时，它给了我一个错误，显然在设置权限之前需要打开会话。
所以，以下内容对我有用： 在onClickLogin（）中，将以下代码添加到else if if：
else if(session.getState().toString().equals("CLOSED_LOGIN_FAILED") && !isSubset(PERMISSIONS, permissions)){
Log.v("LoginType","Login+PermissionsforCancelledTimes");
Session.openActiveSession( Login.this, true, Arrays.asList("public_profile","email") ,statusCallback);
}