我有关于Facebook SDK for android的问题。此代码适用于同一应用程序的另一个活动。我在同一个xml文件中向用户显示相同的FacebookLogin按钮。但在其他活动中,当我在facebook上登录时, onUserInfoFetched 方法不起作用!所以我无法得到用户。
代码在同一个应用程序中。但在不同的活动中。我可以登录他们两个。但我无法得到用户。
以下代码: 这是成功运作的代码:
public class FacebookPreference extends Preference {
private LoginButton loginButton;
private ProfilePictureView profilePictureView;
public static GraphUser user;
private Context mContext;
private enum PendingAction {
NONE, POST_PHOTO, POST_STATUS_UPDATE
}
public FacebookPreference(Context context, AttributeSet attrs) {
super(context, attrs);
this.setWidgetLayoutResource(R.layout.preferences_item_list_facebook);
this.mContext = context;
}
@Override
protected void onBindView(View view) {
super.onBindView(view);
loginButton = (LoginButton) view.findViewById(R.id.login_button);
profilePictureView = (ProfilePictureView) view.findViewById(R.id.profilePicture);
loginButton.setUserInfoChangedCallback(new LoginButton.UserInfoChangedCallback() {
@Override
public void onUserInfoFetched(GraphUser user) {
FacebookPreference.user = user;
updateUI();
}
});
}
private void updateUI() {
Session session = Session.getActiveSession();
if (user != null) {
profilePictureView.setProfileId(user.getId());
} else {
profilePictureView.setProfileId(null);
}
}
}
这是不起作用的代码。
public class FacebookLoginActivity extends Activity{
LoginButton button;
private ProfilePictureView profilePictureView;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.preferences_item_list_facebook);
button = (LoginButton) findViewById(R.id.login_button);
profilePictureView = (ProfilePictureView) findViewById(R.id.profilePicture);
button.setUserInfoChangedCallback(new LoginButton.UserInfoChangedCallback() {
@Override
public void onUserInfoFetched(GraphUser user) {
FacebookPreference.user = user;
if(FacebookPreference.user != null)
Toast.makeText(FacebookLoginActivity.this, FacebookPreference.user.getName().toString(), Toast.LENGTH_LONG).show();
updateUI();
}
});
};
private void updateUI() {
Session session = Session.getActiveSession();
if (FacebookPreference.user != null) {
profilePictureView.setProfileId(FacebookPreference.user.getId());
} else {
profilePictureView.setProfileId(null);
}
}
}
xml文件:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:facebook="http://schemas.android.com/apk/res-auto"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@drawable/menu_item_back"
android:orientation="horizontal" >
<com.facebook.widget.ProfilePictureView
android:id="@+id/profilePicture"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
facebook:preset_size="normal" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginRight="5dp"
android:orientation="vertical" >
<com.facebook.widget.LoginButton
android:id="@+id/login_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
facebook:confirm_logout="false"
facebook:fetch_user_info="true" >
</com.facebook.widget.LoginButton>
</LinearLayout>
</LinearLayout>
感谢您的回答。
答案 0 :(得分:1)
如果您查看此代码有效的其他活动,您会注意到UiLifecycleHelper
成员显示每个Activity生命周期方法,如:
@Override
protected void onResume() {
super.onResume();
uiHelper.onResume();
}
@Override
protected void onPause() {
super.onPause();
uiHelper.onPause();
}
等
同样实现它,回调应该有效。
答案 1 :(得分:-1)
看看这个对我有用的工作并看看这个答案Facebook Sdk User details
private String UserInfoDisplay(GraphUser user) {
StringBuilder userInfo = new StringBuilder("");
String Name = user.getName();
String Id = user.getId();
String lastname = user.getLastName();
String firstname = user.getFirstName();
String getUsername = user.getUsername();
String get_gender = (String) user.getProperty("gender");
String image_url = "http://graph.facebook.com/"+user.getId()+"/picture?type=square";
Log.i("User information == >", Name +Id + lastname+
firstname + image_url + get_gender + getUsername + "usermail"+User_mail );
text.setText(Name + " mail = " +User_mail);
return userInfo.toString();
}