0

这是我的代码

package mypackage.fragments;

public class TeachersDetailedFragment extends Fragment implements MyInterface,
        OnClickListener {

private Session.StatusCallback callback;
private UiLifecycleHelper uiHelper;

private Button shareButton;
private LoginButton lb;

private boolean pendingPublishReauthorization = false;
private static final String PENDING_PUBLISH_KEY = "pendingPublishReauthorization";

public TeachersDetailedFragment() {
    super();
}

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setHasOptionsMenu(true);
    Log.i("Tag:", getTag());

    ...

    callback = new Session.StatusCallback() {
        @Override
        public void call(Session session, SessionState state,
                Exception exception) {
            onSessionStateChange(session, state, exception);
        }
    };

    uiHelper = new UiLifecycleHelper(getActivity(), callback);
    uiHelper.onCreate(savedInstanceState);

}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    setRetainInstance(true);

    ...

    lb = (LoginButton) parentView.findViewById(R.id.authButton);
    lb.setFragment(this);

    shareButton = (Button) parentView.findViewById(R.id.shareButton);
    shareButton.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            publishStory(null, pendingPublishReauthorization);
        }
    });

    ...

    if (savedInstanceState != null) {
        pendingPublishReauthorization = savedInstanceState.getBoolean(
                PENDING_PUBLISH_KEY, false);
    }

    return parentView;
}


private void onSessionStateChange(Session session, SessionState state,
        Exception exception) {

    if (state.isOpened()) {
        shareButton.setVisibility(View.VISIBLE);
        // lb.setVisibility(View.GONE);
        if (pendingPublishReauthorization
                && state.equals(SessionState.OPENED_TOKEN_UPDATED)) {
            pendingPublishReauthorization = false;
            publishStory(null, pendingPublishReauthorization);
        }

        Log.i("facebook", "Logged in...");
        // TODO hide logout button
    } else if (state.isClosed()) {
        shareButton.setVisibility(View.GONE);
        lb.setVisibility(View.VISIBLE);
        Log.i("facebook", "Logged out...");
    }
}


@Override
public void onResume() {
    super.onResume();
    // For scenarios where the main activity is launched and user
    // session is not null, the session state change notification
    // may not be triggered. Trigger it if it's open/closed.
    Session session = Session.getActiveSession();
    if (session != null && (session.isOpened() || session.isClosed())) {
        onSessionStateChange(session, session.getState(), null);
    }
    uiHelper.onResume();

}

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    uiHelper.onActivityResult(requestCode, resultCode, data);
    Log.e("result meghívva", "meghívva ez a fos");
    // Session.getActiveSession().onActivityResult(getActivity(),
    // requestCode,
    // resultCode, data);
}

@Override
public void onPause() {
    super.onPause();
    uiHelper.onPause();
}

@Override
public void onDestroy() {
    super.onDestroy();
    uiHelper.onDestroy();
    MainActivity.fragmentList.remove(getTag().toString());
}

@Override
public void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    outState.putBoolean(PENDING_PUBLISH_KEY, pendingPublishReauthorization);
    uiHelper.onSaveInstanceState(outState);
}

private void publishStory(List<String> PERMISSIONS,
        boolean pendingPublishReauthorization) {
    final Session session = Session.getActiveSession();

    if (session != null) {

        // Check for publish permissions
        List<String> permissions = session.getPermissions();
        try {
            if (!isSubsetOf(Arrays.asList("publish_actions"), permissions)) {
                pendingPublishReauthorization = true;
                Session.NewPermissionsRequest newPermissionsRequest = new Session.NewPermissionsRequest(
                        getActivity(), Arrays.asList("publish_actions"));
                session.requestNewPublishPermissions(newPermissionsRequest); //ERROR HERE - line //607
                return;
            }
        } catch (Exception e) {
            e.printStackTrace();
            Toast.makeText(
                    getActivity().getApplicationContext(),
                    "Sajnos nem sikerült megosztani, próbáljon újra bejelentkezni",
                    Toast.LENGTH_LONG).show();
            // session.close();
        }

        Bundle postParams = new Bundle();
        String[] images = feedItem.getImages();
        postParams.putString("name", feedItem.getFirstname() + " "
                + feedItem.getLastname() + " " + feedItem.getName());
        postParams.putString("caption", "test");
        postParams.putString("description", "test");
        postParams.putString("link", feedItem.getUrl());
        postParams.putString("picture", (Globals.BASE_URL + images[0]));

        Request.Callback callback = new Request.Callback() {
            @Override
            public void onCompleted(com.facebook.Response response) {
                try {
                    JSONObject graphResponse = response.getGraphObject()
                            .getInnerJSONObject(); //ERROR HERE - LINE 633
                    String postId = null;
                    postId = graphResponse.getString("id");
                } catch (JSONException e) {
                    Log.i("exception", "JSON error " + e.getMessage());
                }
                FacebookRequestError error = response.getError();
                if (error != null) {
                    Log.e("face megosztás hiba", error.getErrorMessage());
                    Toast.makeText(getActivity().getApplicationContext(),
                            "Sajnos nem sikerült megosztani",
                            Toast.LENGTH_SHORT).show();
                    session.close();
                } else {
                    Log.i("facebook", "sikeres post");
                    Toast.makeText(getActivity().getApplicationContext(),
                            "Sikeresen megosztva!", Toast.LENGTH_LONG)
                            .show();
                    // session.close();
                }
            }

        };

        Request request = new Request(session, "me/feed", postParams,
                HttpMethod.POST, callback);

        RequestAsyncTask task = new RequestAsyncTask(request);
        task.execute();

    }

}

private boolean isSubsetOf(Collection<String> subset,
        Collection<String> superset) {
    for (String string : subset) {
        if (!superset.contains(string)) {
            return false;
        }
    }
    return true;
}

}

登录成功，之后，我试图发布到 facebook，但我的应用程序崩溃，在 logcat 中说以下内容：

01-06 19:59:06.966: W/System.err(13701): java.lang.UnsupportedOperationException: Session: an 

attempt was made to request new permissions for a session that has a pending request.
01-06 19:59:06.967: W/System.err(13701):    at com.facebook.Session.requestNewPermissions(Session.java:1248)
01-06 19:59:06.967: W/System.err(13701):    at com.facebook.Session.requestNewPublishPermissions(Session.java:595)
01-06 19:59:06.967: W/System.err(13701):    at hu.karathb.netcar.fragments.TeachersDetailedFragment.publishStory(TeachersDetailedFragment.java:607)
01-06 19:59:06.967: W/System.err(13701):    at hu.karathb.netcar.fragments.TeachersDetailedFragment.access$2(TeachersDetailedFragment.java:594)
01-06 19:59:06.967: W/System.err(13701):    at hu.karathb.netcar.fragments.TeachersDetailedFragment$2.onClick(TeachersDetailedFragment.java:120)
01-06 19:59:06.967: W/System.err(13701):    at android.view.View.performClick(View.java:4756)
01-06 19:59:06.967: W/System.err(13701):    at android.view.View$PerformClick.run(View.java:19749)
01-06 19:59:06.967: W/System.err(13701):    at android.os.Handler.handleCallback(Handler.java:739)
01-06 19:59:06.967: W/System.err(13701):    at android.os.Handler.dispatchMessage(Handler.java:95)
01-06 19:59:06.967: W/System.err(13701):    at android.os.Looper.loop(Looper.java:135)
01-06 19:59:06.967: W/System.err(13701):    at android.app.ActivityThread.main(ActivityThread.java:5221)
01-06 19:59:06.967: W/System.err(13701):    at java.lang.reflect.Method.invoke(Native Method)
01-06 19:59:06.967: W/System.err(13701):    at java.lang.reflect.Method.invoke(Method.java:372)
01-06 19:59:06.968: W/System.err(13701):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
01-06 19:59:06.968: W/System.err(13701):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
01-06 19:59:07.212: D/AndroidRuntime(13701): Shutting down VM
01-06 19:59:07.214: E/AndroidRuntime(13701): FATAL EXCEPTION: main
01-06 19:59:07.214: E/AndroidRuntime(13701): Process: hu.karathb.netcar, PID: 13701
01-06 19:59:07.214: E/AndroidRuntime(13701): java.lang.NullPointerException: Attempt to invoke interface method 'org.json.JSONObject com.facebook.model.GraphObject.getInnerJSONObject()' on a null object reference
01-06 19:59:07.214: E/AndroidRuntime(13701):    at hu.karathb.netcar.fragments.TeachersDetailedFragment$8.onCompleted(TeachersDetailedFragment.java:633)
01-06 19:59:07.214: E/AndroidRuntime(13701):    at com.facebook.Request$4.run(Request.java:1666)
01-06 19:59:07.214: E/AndroidRuntime(13701):    at android.os.Handler.handleCallback(Handler.java:739)
01-06 19:59:07.214: E/AndroidRuntime(13701):    at android.os.Handler.dispatchMessage(Handler.java:95)
01-06 19:59:07.214: E/AndroidRuntime(13701):    at android.os.Looper.loop(Looper.java:135)
01-06 19:59:07.214: E/AndroidRuntime(13701):    at android.app.ActivityThread.main(ActivityThread.java:5221)
01-06 19:59:07.214: E/AndroidRuntime(13701):    at java.lang.reflect.Method.invoke(Native Method)
01-06 19:59:07.214: E/AndroidRuntime(13701):    at java.lang.reflect.Method.invoke(Method.java:372)
01-06 19:59:07.214: E/AndroidRuntime(13701):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
01-06 19:59:07.214: E/AndroidRuntime(13701):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)

可能是什么问题？谢谢你的帮助！

4

1 回答 1

0

这里有两个问题。

首先是您的应用程序在仍有待处理操作时请求发布权限（您是否发布了整个片段？似乎有一个不在这里的 TeachersDetailedFragment.access 类/方法）。我认为这是因为您首先打开一个会话，然后在第一次打开完成之前立即请求发布权限。请记住，会话打开（和新权限请求）是异步的，因此您必须在请求新权限之前等待 onSessionStateChange 方法。

其次是你的 NPE，这实际上是你的应用程序崩溃的原因。这纯粹是因为您没有结果（因为您还没有获得权限），所以 graphResponse.getGraphObject() 为空，如果您尝试对其调用 getInnerJSONObject ，它将抛出 NPE。这根本与 SDK 无关，但您应该始终进行空检查（或首先检查来自 graphResponse 的错误）。

于 2015-01-07T18:14:53.643 回答