Android Facebook SDK 3.0 session 状态 "Opening"

Question

我正在使用他们的文档集成 Facebook 的登录。我遇到了一个问题，当我单击 Facebook 登录小部件时， session 更改为“正在打开”并且应用程序崩溃

我的 Facebook 按钮布局

 <com.facebook.widget.LoginButton
    android:id="@+id/authButton"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_centerHorizontal="true" 
    />

fragment 是

public class FacebookFragment extends Fragment {
private static final String TAG = "FacebookFragment";
private UiLifecycleHelper uiHelper;
private Session.StatusCallback callback = new Session.StatusCallback() {
    @Override
    public void call(final Session session, final SessionState state, final Exception exception) {
        onSessionStateChange(session, state, exception);
    }
};

@Override
public View onCreateView(LayoutInflater inflater, 
        ViewGroup container, 
        Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.activity_main, container, false);
    LoginButton authButton = (LoginButton) view.findViewById(R.id.authButton);
    authButton.setFragment(this);
    authButton.setReadPermissions(Arrays.asList("user_likes", "user_status"));
    return view;
}

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    uiHelper = new UiLifecycleHelper(getActivity(), callback);
    uiHelper.onCreate(savedInstanceState);
}

@Override
public void onResume() {
    super.onResume();
    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);
}

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

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

@Override
public void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    uiHelper.onSaveInstanceState(outState);
}

private void onSessionStateChange(Session session, SessionState state, Exception exception) {
    if (state.isOpened()) {
        Log.i(TAG, "Logged in...");
    } else if (state.isClosed()) {
        Log.i(TAG, "Logged out...");
    }
    else
        Log.i(TAG, session.toString());
}

并且在 Activity 中我已经实现了所需的 onActivityResult 并检索了 fragment

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    if(savedInstanceState == null) {
            // Add the fragment on initial activity setup
            mainFragment = new FacebookFragment();
            getSupportFragmentManager()
            .beginTransaction()
            .add(android.R.id.content, mainFragment)
            .commit();
        } else {
            // Or set the fragment from restored state info
            mainFragment = (FacebookFragment) getSupportFragmentManager()
            .findFragmentById(android.R.id.content);
        }   
}


    @Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    Session.getActiveSession().onActivityResult(this, requestCode, resultCode, data);
}

我认为问题可能出在 key 哈希上，但我完全遵循了此问题上发布的答案中的说明 Key hash for Android-Facebook app

任何有关如何使状态变为“已打开”的线索都将不胜感激

Answer 1

问题在于在进行 facebook 登录的 Activity 中设置了 android:clearTaskOnLaunch="true"。无法调用 OnActivityResult。当我在 Debug模式下运行应用程序时，我能够得到一个异常。