android – java.lang.UnsupportedOperationException：Session：尝试为具有挂起请求的会话请求新权限

下面的代码是用于在 android中使用facebookSDK3.0发布状态更新.如果我使用的是UiLifeCycleHelper类,那么它的运行状况良好.但我想在不使用UiLifeCycleHelper类的情况下在facebook中发布状态.我尝试了下面的代码,它在我的logcat中抛出错误,我的应用程序被强制关闭.

public class SampleFBPostActivity extends Activity implements OnClickListener {

private EditText mPostEditText;
private Button mDoneButton;
private Session mSession;
private PendingAction pendingAction = PendingAction.NONE;

private static final List<String> PERMISSIONS = Arrays.asList("publish_actions");
private enum PendingAction {
    NONE,POST_STATUS_updatE
}

@Override
protected void onCreate(Bundle savedInstanceStatE) {
    super.onCreate(savedInstanceStatE);
    setContentView(R.layout.fb_post);
    mPostEditText = (EditText) findViewById(R.id.post_text);
    mDoneButton = (Button) findViewById(R.id.done_button);
    mDoneButton.setOnClickListener(this);
    mSession = Session.getActiveSession();
    if (mSession == null) {
        mSession = new Session(this);
        Session.setActiveSession(mSession);
    }
    updateUI();
    handlePendingAction();
}

@Override
public void onClick(View v) {
    switch (v.getId()) {
    case R.id.done_button:
        onClickPostStatusupdate();
        break;
    }
}

 privatE interface GraphObjectWithId extends GraphObject {
        String getId();
    }

 private void showPublishResult(String message,GraphObject result,FacebookrequestError error) {
        String title = null;
        String alertmessage = null;
        if (error == null) {
            title = getString(R.String.success);
            String id = result.cast(GraphObjectWithId.class).getId();
            alertmessage = getString(R.String.successfully_posted_post,message,id);
        } else {
            title = getString(R.String.error);
            alertmessage = error.getErrormessage();
        }

        new AlertDialog.builder(this)
                .settitle(titlE)
                .setmessage(alertmessagE)
                .setPositiveButton(R.String.ok,null)
                .show();
    }

    private void onClickPostStatusupdate() {
        performPublish(PendingAction.POST_STATUS_updatE);
    }

    private void postStatusupdate(final String messagE) {
        if (mSession != null && hasPublishPermission()) {
            request request = request
                    .newStatusupdaterequest(Session.getActiveSession(),new request.CallBACk() {
                        @Override
                        public void onCompleted(Response responsE) {
                            showPublishResult(message,response.getGraphObject(),response.getError());
                        }
                    });
            request.executeAsync();
        } else {
            pendingAction = PendingAction.POST_STATUS_updatE;
        }
    }

    private Boolean hasPublishPermission() {
        Session session = Session.getActiveSession();
        return session != null && session.getPermissions().contains("publish_actions");
    }

    private void performPublish(PendingAction action) {
        Session session = Session.getActiveSession();
        if (session != null) {
            pendingAction = action;
            if (hasPublishPermission()) {
                handlePendingAction();
            } else {
                session.requestNewPublishPermissions(new Session.NewPermissionsrequest(this,PERMISSIONS));
            }
        }
    }

private void updateUI() {
    Session session = Session.getActiveSession();
    Boolean enableButtons = (session != null && session.isOpened());
    mDoneButton.setEnabled(enableButtons);
}

 private void handlePendingAction() {
        PendingAction prevIoUslyPendingAction = pendingAction;
        pendingAction = PendingAction.NONE;

        switch (prevIoUslyPendingAction) {

            case POST_STATUS_updatE:
                postStatusupdate(mPostEditText.getText().toString());
                break;
        }
    }
}

以下是logcat中的错误：

02-09 14:00:36.126: E/AndroidRuntime(2396): java.lang.UnsupportedoperationException: Session: an attempt was made to request new permissions for a session that has a pending request.
  02-09 14:00:36.126: E/AndroidRuntime(2396):   at com.facebook.Session.requestNewPermissions(Session.java:968)
  02-09 14:00:36.126: E/AndroidRuntime(2396):   at com.facebook.Session.requestNewPublishPermissions(Session.java:501)
  02-09 14:00:36.126: E/AndroidRuntime(2396):   at com.facebook.samples.sessionlogin.SampleFBPostActivity.performPublish(SampleFBPostActivity.java:113)
  02-09 14:00:36.126: E/AndroidRuntime(2396):   at com.facebook.samples.sessionlogin.SampleFBPostActivity.onClickPostStatusupdate(SampleFBPostActivity.java:83)
  02-09 14:00:36.126: E/AndroidRuntime(2396):   at com.facebook.samples.sessionlogin.SampleFBPostActivity.onClick(SampleFBPostActivity.java:54)
  02-09 14:00:36.126: E/AndroidRuntime(2396):   at android.view.View.performClick(View.java:3511)
  02-09 14:00:36.126: E/AndroidRuntime(2396):   at android.view.View$PerformClick.run(View.java:14105)
  02-09 14:00:36.126: E/AndroidRuntime(2396):   at android.os.Handler.handleCallBACk(Handler.java:605)
  02-09 14:00:36.126: E/AndroidRuntime(2396):   at android.os.Handler.dispatchmessage(Handler.java:92)
  02-09 14:00:36.126: E/AndroidRuntime(2396):   at android.os.Looper.loop(Looper.java:137)
  02-09 14:00:36.126: E/AndroidRuntime(2396):   at android.app.ActivityThread.main(ActivityThread.java:4424)
  02-09 14:00:36.126: E/AndroidRuntime(2396):   at java.lang.reflect.Method.invokeNative(Native Method)
  02-09 14:00:36.126: E/AndroidRuntime(2396):   at java.lang.reflect.Method.invoke(Method.java:511)
  02-09 14:00:36.126: E/AndroidRuntime(2396):   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
  02-09 14:00:36.126: E/AndroidRuntime(2396):   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
  02-09 14:00:36.126: E/AndroidRuntime(2396):   at dalvik.system.NativeStart.main(Native Method)

请不要在解决方案中使用UiLifeCycleHelper类来帮助我.提前致谢