我已经跟随一些Facebook API 3.0教程，包括登录/注销和发布到Feed的示例。所以登录方式如下:
我不想让用户以这种方式登录。我希望他们在没有任何登录/注册的情况下使用我的应用程序，然后如果他们点击Facebook特定功能，例如在Facebook上分享笔记，则应用程序应该询问他们是否允许Facebook使用他们的应用程序或其他内容（通常都会出现）。如果没有这个操作，因为没有进行登录，publishFeedDialog()函数将返回nullpointer。
那么我的问题是，我如何忽略带有登录按钮的SplashFragment，因此当用户在我的应用程序中单击Facebook功能时，不会显示新屏幕并显示登录按钮，而只会出现用户习惯的默认Facebook身份验证窗口？
@erdomester, @sromku
Facebook发布了新的SDK版本4.x，其中Session已过时
现在有一种新的Facebook登录概念
LoginManager和AccessToken - 这些新类执行Facebook登录
所以，现在您可以在没有登录按钮的情况下访问Facebook身份验证
layout.xml
<Button
android:id="@+id/btn_fb_login"
.../>
主活动界面.java
private CallbackManager mCallbackManager;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
FacebookSdk.sdkInitialize(this.getApplicationContext());
mCallbackManager = CallbackManager.Factory.create();
LoginManager.getInstance().registerCallback(mCallbackManager,
new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
Log.d("Success", "Login");
}
@Override
public void onCancel() {
Toast.makeText(MainActivity.this, "Login Cancel", Toast.LENGTH_LONG).show();
}
@Override
public void onError(FacebookException exception) {
Toast.makeText(MainActivity.this, exception.getMessage(), Toast.LENGTH_LONG).show();
}
});
setContentView(R.layout.activity_main);
Button btn_fb_login = (Button)findViewById(R.id.btn_fb_login);
btn_fb_login.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
LoginManager.getInstance().logInWithReadPermissions(this, Arrays.asList("public_profile", "user_friends"));
}
});
}
如下内容未添加，此方法将无法正常工作（由@Daniel Zolnai在下面的评论中指出）：
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(mCallbackManager.onActivityResult(requestCode, resultCode, data)) {
return;
}
}
MainActivity.this设置为logInWithReadPermissions()的属性。否则，this将指代View.OnClickListener而非Activity。 - lagos类似这样的东西
private void performFacebookLogin()
{
Log.d("FACEBOOK", "performFacebookLogin");
final Session.NewPermissionsRequest newPermissionsRequest = new Session.NewPermissionsRequest(this, Arrays.asList("email"));
Session openActiveSession = Session.openActiveSession(this, true, new Session.StatusCallback()
{
@Override
public void call(Session session, SessionState state, Exception exception)
{
Log.d("FACEBOOK", "call");
if (session.isOpened() && !isFetching)
{
Log.d("FACEBOOK", "if (session.isOpened() && !isFetching)");
isFetching = true;
session.requestNewReadPermissions(newPermissionsRequest);
Request getMe = Request.newMeRequest(session, new GraphUserCallback()
{
@Override
public void onCompleted(GraphUser user, Response response)
{
Log.d("FACEBOOK", "onCompleted");
if (user != null)
{
Log.d("FACEBOOK", "user != null");
org.json.JSONObject graphResponse = response.getGraphObject().getInnerJSONObject();
String email = graphResponse.optString("email");
String id = graphResponse.optString("id");
String facebookName = user.getUsername();
if (email == null || email.length() < 0)
{
Logic.showAlert(
ActivityLogin.this,
"Facebook Login",
"An email address is required for your account, we could not find an email associated with this Facebook account. Please associate a email with this account or login the oldskool way.");
return;
}
}
}
});
getMe.executeAsync();
}
else
{
if (!session.isOpened())
Log.d("FACEBOOK", "!session.isOpened()");
else
Log.d("FACEBOOK", "isFetching");
}
}
});
确实就是这样。对我来说它完美地工作。
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.widget.TextView;
import com.facebook.*;
import com.facebook.model.*;
public class MainActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// start Facebook Login
Session.openActiveSession(this, true, new Session.StatusCallback() {
// callback when session changes state
@Override
public void call(Session session, SessionState state, Exception exception) {
if (session.isOpened()) {
// make request to the /me API
Request.newMeRequest(session, new Request.GraphUserCallback() {
// callback after Graph API response with user object
@Override
public void onCompleted(GraphUser user, Response response) {
if (user != null) {
TextView welcome = (TextView) findViewById(R.id.welcome);
welcome.setText("Hello " + user.getName() + "!");
}
}
}).executeAsync();
}
}
});
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
Session.getActiveSession().onActivityResult(this, requestCode, resultCode, data);
}
}
List<String> permissions = session.getPermissions();
Session.NewPermissionsRequest newPermissionsRequest = new Session.NewPermissionsRequest(getActivity(), Arrays.asList("read_mailbox"));
session.requestNewReadPermissions(newPermissionsRequest);
permissions 变量是用来做什么的？它似乎在下一条语句中没有被使用。 - Konrad Morawski1）隐藏您的LoginButton UI
2）添加您自己的自定义按钮
Button signup = (Button) view.findViewById(R.id.btn_signup);
signup.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
loginButton.performClick();//Where loginButton is Facebook UI
}
});
但我建议使用LoginManager
LoginButton 的情况下登录，并执行诸如发布动态、获取个人资料/好友、发送邀请等简单操作。OnLoginOutListener onLoginOutListener = new SimpleFacebook.OnLoginOutListener()
{
@Override
public void onFail()
{
Log.w(TAG, "Failed to login");
}
@Override
public void onException(Throwable throwable)
{
Log.e(TAG, "Bad thing happened", throwable);
}
@Override
public void onThinking()
{
// show progress bar or something to the user while login is happening
Log.i(TAG, "In progress");
}
@Override
public void onLogout()
{
// change the state of the button or do whatever you want
Log.i(TAG, "Logged out");
}
@Override
public void onLogin()
{
// change the state of the button or do whatever you want
Log.i(TAG, "Logged in");
}
};
// set login/logut listener
mSimpleFacebook.setLogInOutListener(onLoginOutListener);
// do the login action
mSimpleFacebook.login(MainActivity.this);
onLogin()回调方法中，您可以像这样发布动态：// build feed
Feed feed = new Feed.Builder()
.setMessage("Clone it out...")
.setName("Simple Facebook for Android")
.setCaption("Code less, do the same.")
.setDescription("The Simple Facebook library project makes the life much easier by coding less code for being able to login, publish feeds and open graph stories, invite friends and more.")
.setPicture("https://raw.github.com/sromku/android-simple-facebook/master/Refs/android_facebook_sdk_logo.png")
.setLink("https://github.com/sromku/android-simple-facebook")
.build();
// publish the feed
mSimpleFacebook.publish(feed);
您可以使用基于Node的facebook-proxy模块绕过登录对话框。使用一键部署按钮在Heroku上创建自己的实例。
它的基本功能如下：
access_tokenexpress-http-proxy打开代理服务器您可以更改放置Facebook按钮的位置并调整其可见性。例如：
<FrameLayout
android:id="@+id/frameLayout_facebook"
android:layout_width="0dp"
android:layout_height="wrap_content">
<com.google.android.material.button.MaterialButton
android:id="@+id/button_continue_facebook"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/continue_with_facebook" />
<com.facebook.login.widget.LoginButton
android:id="@+id/loginButton_facebook"
android:visibility="gone"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</FrameLayout>
button_continue_facebook.setOnClickListener {
binding.loginButton_facebook.callOnClick()
}