blocks|key|2179708|text|在尝试为我的应用程序实现登录库时，我遇到了同样的问题。到目前为止，我找到的解决方案是将facebook-sdk中的LoginClickListener类从私有改为公共，这样我就可以在我的活动中重写onClick方法。下面是我更改的代码行。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2179709|发自：|2179710|private+class+LoginClickListener+implements+OnClickListener+{
++++@Override
++++public+void+onClick(View+v)+{
++++++++...|code-block|syntax|javascript|2179711|至：|2179712|public+class+LoginClickListener+implements+OnClickListener+{
++++@Override
++++public+void+onClick(View+v)+{
++++++++...|2179713|然后，在我的活动中，我能够重写onClick方法。|2179714|LoginButton+facebookButton+=+(LoginButton)+findViewById(R.id.authButton);
facebookButton.setOnClickListener(+facebookButton.new+LoginClickListener(){
++++@Override
++++public+void+onClick(View+v)+{
++++++++//Do+whatever+u+want
++++++++super.onClick(v);
++++}
});|2179715|祝好运。|2179716|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|X|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|Z|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|10|8|@]|9|@]|A|$G|H]]|$1|Q|3|R|5|6|7|11|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

I've run into the same problem while trying to implement a login lib for my application. So far the solution I found, still not sure whether it is the best or not, was changing LoginClickListener Class inside facebook-sdk from private to public, so I could override the onClick method on my Activity. Here is the line I've changed.

From:

<pre><code>private class LoginClickListener implements OnClickListener {
 @Override
 public void onClick(View v) {
 ...
</code></pre>

To:

<pre><code>public class LoginClickListener implements OnClickListener {
 @Override
 public void onClick(View v) {
 ...
</code></pre>

Then on my Activity I'm able to Override onClick method.

<pre><code>LoginButton facebookButton = (LoginButton) findViewById(R.id.authButton);
facebookButton.setOnClickListener( facebookButton.new LoginClickListener(){
 @Override
 public void onClick(View v) {
 //Do whatever u want
 super.onClick(v);
 }
});
</code></pre>

Good luck.

blocks|key|5531035|text|查看HelloFacebookSample。他们在那里做这样的事情。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|5531036|loginButton.setUserInfoChangedCallback(new+LoginButton.UserInfoChangedCallback()+{
++++@Override
++++public+void+onUserInfoFetched(GraphUser+user)+{
++++++++updateUI(user);
++++}
});|code-block|syntax|javascript|5531037|然后在updateUI()方法中|5531038|private+void+updateUI(GraphUser+user)+{
++++Session+session+=+Session.getActiveSession();
++++if+(session+!=+null+&&+session.isOpened()+&&+user+!=+null)+{
++++++++mTextView.setText(user.getFirstName());
++++}
}|5531039|如果您正在关注连接会话(请参阅示例以了解详细信息)，则即使用户退出应用程序，登录状态也将保持不变。|5531040|entityMap^0|2|J|0|0|3|A|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|10|8|@]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|R|$]]

Look into the <code>HelloFacebookSample</code>. They are doing something like this there.

<pre><code>loginButton.setUserInfoChangedCallback(new LoginButton.UserInfoChangedCallback() {
 @Override
 public void onUserInfoFetched(GraphUser user) {
 updateUI(user);
 }
});
</code></pre>

then in <code>updateUI()</code> method

<pre><code>private void updateUI(GraphUser user) {
 Session session = Session.getActiveSession();
 if (session != null &amp;&amp; session.isOpened() &amp;&amp; user != null) {
 mTextView.setText(user.getFirstName());
 }
}
</code></pre>

If you are taking care about the connection session(see the sample for details), then the user login status will be kept even when he exit the app.

blocks|key|56243|text|我没有重载LoginButton，而只是使用了图像背景。虽然默认情况下文本不会完全对齐，但调整页边距可能会有所帮助。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|56244|Button+fbBtn+=+(Button)findViewById(R.id.fbLogin)+;
if(+fbBtn+!=+null+)
{
++++fbBtn.setBackgroundDrawable(getResources().getDrawable(R.drawable.com_facebook_loginbutton_blue)+)+;
++++fbBtn.setText(+R.string.prompt_login_yes+)+;
++++fbBtn.setTextColor(+getResources().getColor(R.color.com_facebook_loginview_text_color)+)+;
++++fbBtn.setTextSize(+16+)+;
++++fbBtn.setVisibility(View.VISIBLE)+;
}+|code-block|syntax|javascript|56245|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Instead of overloading the LoginButton, I just used the image background. While the text does not align perfectly by default, playing with the margins can help.

<pre><code>Button fbBtn = (Button)findViewById(R.id.fbLogin) ;
if( fbBtn != null )
{
 fbBtn.setBackgroundDrawable(getResources().getDrawable(R.drawable.com_facebook_loginbutton_blue) ) ;
 fbBtn.setText( R.string.prompt_login_yes ) ;
 fbBtn.setTextColor( getResources().getColor(R.color.com_facebook_loginview_text_color) ) ;
 fbBtn.setTextSize( 16 ) ;
 fbBtn.setVisibility(View.VISIBLE) ;
} 
</code></pre>

blocks|key|5531104|text|而不是试图覆盖onclick方法或更改Facebook的lib。您可以使用SessionState来检测是否已单击loginButton。当SessionState打开时，表示该按钮已被单击|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|5531105|private+Session.StatusCallback+fBcallback+=+new+Session.StatusCallback()+{
++++@Override
++++public+void+call(Session+session,+SessionState+state,
++++++++++++Exception+exception)+{
++++++++Session+fbSession+=+session;

++++++++Log.e(this.getClass().getName(),+"fbSession+isNULL+"
++++++++++++++++%2B+(fbSession+==+null));

++++++++Log.e(this.getClass().getName(),
++++++++++++++++"fbSession+state:"+%2B+fbSession.getState()+%2B+"");

++++++++switch+(fbSession.getState())+{
++++++++case+CLOSED:
++++++++++++Log.e(this.getClass().getName(),+"CLOSED");

++++++++++++break;
++++++++case+CLOSED_LOGIN_FAILED:
++++++++++++Log.e(this.getClass().getName(),+"CLOSED+LOGIN+FAILED");

++++++++++++authButton.setVisibility(View.VISIBLE);
++++++++++++rl.setVisibility(View.GONE);
++++++++++++break;
++++++++case+CREATED:
++++++++++++Log.e(this.getClass().getName(),+"CREATED");

++++++++++++break;
++++++++case+CREATED_TOKEN_LOADED:
++++++++++++Log.e(this.getClass().getName(),+"CREATED+TOKEN+LOADED");

++++++++++++break;
++++++++case+OPENED:
++++++++++++Log.e(this.getClass().getName(),+"OPENED");

++++++++++++break;
++++++++case+OPENED_TOKEN_UPDATED:
++++++++++++Log.e(this.getClass().getName(),+"OPENED+TOKEN+UPDATED");

++++++++++++break;
++++++++case+OPENING:
++++++++++++Log.e(this.getClass().getName(),+"OPENING");

++++++++++++authButton.setVisibility(View.GONE);
++++++++++++rl.setVisibility(View.VISIBLE);
++++++++++++break;
++++++++}

++++++++if+(fbSession.isOpened())+{
++++++++++++Log.e(this.getClass().getName(),+"fbSession+is+opened");

++++++++++++getFBUserData();
++++++++}
++++++++if+(fbSession.isClosed())+{
++++++++++++Log.e(this.getClass().getName(),+"fbSession+is+closed,+logout");
++++++++++++Token.removeToken(mActivity);
++++++++}
++++}

};|code-block|syntax|javascript|5531106|entityMap^0|7|7|11|C|1L|B|1Y|C|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]|$9|R|A|S|B|C]|$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|L|$]]

Instead of trying to override the <code>onclick</code> method or changing Facebook's lib. you can use the <code>SessionState</code> to detect if the <code>loginButton</code> has been clicked. When the <code>SessionState</code> is OPENING it means that the button has been clicked 

<pre><code>private Session.StatusCallback fBcallback = new Session.StatusCallback() {
 @Override
 public void call(Session session, SessionState state,
 Exception exception) {
 Session fbSession = session;

 Log.e(this.getClass().getName(), "fbSession isNULL "
 + (fbSession == null));

 Log.e(this.getClass().getName(),
 "fbSession state:" + fbSession.getState() + "");

 switch (fbSession.getState()) {
 case CLOSED:
 Log.e(this.getClass().getName(), "CLOSED");

 break;
 case CLOSED_LOGIN_FAILED:
 Log.e(this.getClass().getName(), "CLOSED LOGIN FAILED");

 authButton.setVisibility(View.VISIBLE);
 rl.setVisibility(View.GONE);
 break;
 case CREATED:
 Log.e(this.getClass().getName(), "CREATED");

 break;
 case CREATED_TOKEN_LOADED:
 Log.e(this.getClass().getName(), "CREATED TOKEN LOADED");

 break;
 case OPENED:
 Log.e(this.getClass().getName(), "OPENED");

 break;
 case OPENED_TOKEN_UPDATED:
 Log.e(this.getClass().getName(), "OPENED TOKEN UPDATED");

 break;
 case OPENING:
 Log.e(this.getClass().getName(), "OPENING");

 authButton.setVisibility(View.GONE);
 rl.setVisibility(View.VISIBLE);
 break;
 }

 if (fbSession.isOpened()) {
 Log.e(this.getClass().getName(), "fbSession is opened");

 getFBUserData();
 }
 if (fbSession.isClosed()) {
 Log.e(this.getClass().getName(), "fbSession is closed, logout");
 Token.removeToken(mActivity);
 }
 }

};
</code></pre>

I am using <code>com.facebook.widget.LoginButton</code> component to log into Facebook:

<pre><code>public View onCreateView(LayoutInflater inflater, ViewGroup container,
 Bundle savedInstanceState) {
 View view = inflater.inflate(R.layout.splash, container, false);
 LoginButton authButton = (LoginButton) view.findViewById(R.id.login_button);
 stat = (TextView) view.findViewById(R.id.profile_name);
 //authButton.setFragment(this);
 authButton.setReadPermissions(Arrays.asList("user_likes", "user_status",
 "user_status", "user_events", "friends_events"));

 return view;
}
</code></pre>

I want to prompt the user his login status, so I need to change a text view when Facebook's button was pressed.

But I can't seem to find a way to identify user's click, without changing Facebook's lib, or override <code>LoginButton</code> native listener.

Facebook SDK 3 Login Button Identify on click

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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