无法通过Facebook SDK登录

Question

I was trying to integrate Facebook SDK into an Android app with the help of official tutorial provided on Facebook . I have followed all the steps correctly and my application contains no compilation errors. But when I try to test it on a live device I am getting the error as follows:

The page you requested cannot be displayed right now. It may be temporarily unavailable, the link you clicked might be broken or expired, or you may have not the permission to view this page.

I am not able to understand the reason for this error. Please help!

Code:

MainActivity.java

package com.example.myfbapp;

import com.facebook.Request;
import com.facebook.Response;
import com.facebook.Session;
import com.facebook.SessionState;
import com.facebook.model.GraphUser;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.widget.TextView;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Session.openActiveSession(this, true, new Session.StatusCallback(){

        @Override
        public void call(Session session, SessionState state,
                Exception exception) {
            if(session.isOpened()){
                Request.executeMeRequestAsync(session, new Request.GraphUserCallback() {

                    @Override
                    public void onCompleted(GraphUser user, Response response) {
                        if(user!=null){
                            TextView tvWelcome=(TextView)findViewById(R.id.tvWelcome);
                            tvWelcome.setText("Welcome "+user.getName()+"!");
                        }
                    }
                });
            }
        }

    });
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    Session.getActiveSession().onActivityResult(this, requestCode, resultCode, data);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

}

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >

<TextView
    android:id="@+id/tvWelcome"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true"
    android:layout_centerVertical="true"
    android:text="Welcome!" />

</RelativeLayout>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.myfbapp"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.INTERNET"/>

<application
    android:allowBackup="false"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="com.example.myfbapp.MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <meta-data android:value="@string/app_id" android:name="com.facebook.sdk.ApplicationId"/>
    <activity android:name="com.facebook.LoginActivity"></activity>
</application>

</manifest>

Answer 1

Updating the Facebook app on your device may solve the problem ,

It may not work if the Facebook app is not updated. I had the same issue and updating solved it