以下代码用于在android中使用facebookSDK3.0发布状态更新。如果我正在使用UiLifeCycleHelper类它运作良好。但我想在不使用UiLifeCycleHelper课程的情况下在Facebook上发布状态。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(), message, 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课程来帮助我。提前致谢
答案 0 :(得分：7)
您是否有特殊原因想要使用UiLifecycleHelper？该课程专门用于让您的生活更轻松，因此您不会遇到这样的问题。
如果必须，最简单的方法是查看UiLifecycleHelper中的代码，并将它们复制到Activity中的相应方法。
对于您的特定活动，我发现有两件事是错误的：
您无法随时打开会话（直接调用requestNewPublishPermissions，但您需要先打开会话）。调用“新会话”不会打开它。
您没有覆盖onActivityResult方法，这是将信息传递回活动会话所必需的。
答案 1 :(得分：0)
尝试以下代码。发布更新是最简单的示例：
在seeon登录后输入代码：
session.addCallback(new StatusCallback() {
@Override
public void call(Session session, SessionState state,
Exception exception) {
List<String> PERMISSIONS = Arrays
.asList("publish_actions");
session
.requestNewPublishPermissions(new Session.NewPermissionsRequest(
getActivity(), PERMISSIONS));
Request request = Request.newStatusUpdateRequest(
session, "Temple Hello Word Sample",
new Request.Callback() {
@Override
public void onCompleted(Response response) {
L.d("fb:done = "
+ response.getGraphObject() + ","
+ response.getError());
}
});
request.executeAsync();
}
});
以下是来自Facebook SDK3.0的示例会话登录的整个代码：
package com.facebook.samples.sessionlogin;
import java.util.Arrays;
import java.util.List;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;
import com.facebook.LoggingBehavior;
import com.facebook.Request;
import com.facebook.Response;
import com.facebook.Session;
import com.facebook.Session.StatusCallback;
import com.facebook.SessionState;
import com.facebook.Settings;
import com.microtemple.android.lib.common.L;
public class SessionLoginFragment extends Fragment {
private static final String URL_PREFIX_FRIENDS = "https://graph.facebook.com/me/friends?access_token=";
private TextView textInstructionsOrLink;
private Button buttonLoginLogout;
private final Session.StatusCallback statusCallback = new SessionStatusCallback();
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment, container, false);
buttonLoginLogout = (Button) view
.findViewById(R.id.buttonLoginLogout);
textInstructionsOrLink = (TextView) view
.findViewById(R.id.instructionsOrLink);
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)
.setCallback(statusCallback));
}
}
updateView();
return view;
}
@Override
public void onStart() {
super.onStart();
Session.getActiveSession().addCallback(statusCallback);
}
@Override
public void onStop() {
super.onStop();
Session.getActiveSession().removeCallback(statusCallback);
}
@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 updateView() {
Session session = Session.getActiveSession();
if (session.isOpened()) {
textInstructionsOrLink.setText(URL_PREFIX_FRIENDS
+ session.getAccessToken());
buttonLoginLogout.setText(R.string.logout);
buttonLoginLogout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
onClickLogout();
}
});
session.addCallback(new StatusCallback() {
@Override
public void call(Session session, SessionState state,
Exception exception) {
List<String> PERMISSIONS = Arrays
.asList("publish_actions");
session
.requestNewPublishPermissions(new Session.NewPermissionsRequest(
getActivity(), PERMISSIONS));
Request request = Request.newStatusUpdateRequest(
session, "getActiveSession",
new Request.Callback() {
@Override
public void onCompleted(Response response) {
L.d("fb:done = "
+ response.getGraphObject() + ","
+ response.getError());
}
});
request.executeAsync();
}
});
} else {
textInstructionsOrLink.setText(R.string.instructions);
buttonLoginLogout.setText(R.string.login);
buttonLoginLogout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
onClickLogin();
}
});
}
}
private void onClickLogin() {
Session session = Session.getActiveSession();
if (!session.isOpened() && !session.isClosed()) {
session.openForRead(new Session.OpenRequest(this)
.setCallback(statusCallback));
} else {
Session.openActiveSession(getActivity(), this, true,
statusCallback);
}
}
private void onClickLogout() {
Session session = Session.getActiveSession();
if (!session.isClosed()) {
session.closeAndClearTokenInformation();
}
}
private class SessionStatusCallback implements Session.StatusCallback {
@Override
public void call(Session session, SessionState state,
Exception exception) {
updateView();
}
}
}