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package chingyue.chingyuetestfbsdk;
 
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.widget.TextView;
 
import com.facebook.AccessToken;
import com.facebook.CallbackManager;
import com.facebook.FacebookCallback;
import com.facebook.FacebookException;
import com.facebook.FacebookSdk;
import com.facebook.GraphRequest;
import com.facebook.GraphResponse;
import com.facebook.login.LoginBehavior;
import com.facebook.login.LoginManager;
import com.facebook.login.LoginResult;
import com.facebook.login.widget.LoginButton;
 
import org.json.JSONObject;
 
import java.util.Arrays;
 
 
public class MainActivity extends AppCompatActivity {
    CallbackManager callbackManager;
    AccessToken accessToken;
    TextView mTextView ;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        FacebookSdk.sdkInitialize(getApplicationContext());
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        callbackManager = CallbackManager.Factory.create();
        mTextView = (TextView)findViewById(R.id.text);
        LoginButton loginButton = (LoginButton) findViewById(R.id.login_button);
        loginButton.setReadPermissions("public_profile","email");
        loginButton.setLoginBehavior(LoginBehavior.WEB_VIEW_ONLY);
        LoginManager.getInstance().logInWithReadPermissions(this,Arrays.asList("email"));
        loginButton.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
            @Override
            public void onSuccess(LoginResult loginResult) {
                accessToken = loginResult.getAccessToken();
                Log.d("FB","access token got.");
                GraphRequest request = GraphRequest.newMeRequest(
                        accessToken,
                        new GraphRequest.GraphJSONObjectCallback(){
                            @Override
                            public void onCompleted(JSONObject object, GraphResponse response){
                                Log.d("FB","complete");
                                Log.d("FB",object.optString("name"));
                                Log.d("FB",object.optString("email"));
                                Log.d("FB",object.optString("link"));
                                Log.d("FB",object.optString("id"));
                                String name = object.optString("email");
                                mTextView.setText(name);
                            }
                        }
                );
                Bundle parameters = new Bundle();
                parameters.putString("fields","id,name,link");
                request.setParameters(parameters);
                request.executeAsync();
            }
            @Override
            public void onCancel() {
                Log.d("FB","CANCEL");
            }
            @Override
            public void onError(FacebookException exception) {
                Log.d("FB","ERROR");
            }
        });
    }
    @Override
    protected void onActivityResult(int requestCode,int resultCode,Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        callbackManager.onActivityResult(requestCode, resultCode, data);
    }
 
}
 

Main.java:26: error: class MainActivity is public, should be declared in a file named MainActivity.java
public class MainActivity extends AppCompatActivity {
       ^
Main.java:3: error: package android.content does not exist
import android.content.Intent;
                      ^
Main.java:4: error: package android.os does not exist
import android.os.Bundle;
                 ^
Main.java:5: error: package android.support.v7.app does not exist
import android.support.v7.app.AppCompatActivity;
                             ^
Main.java:6: error: package android.util does not exist
import android.util.Log;
                   ^
Main.java:7: error: package android.widget does not exist
import android.widget.TextView;
                     ^
Main.java:9: error: package com.facebook does not exist
import com.facebook.AccessToken;
                   ^
Main.java:10: error: package com.facebook does not exist
import com.facebook.CallbackManager;
                   ^
Main.java:11: error: package com.facebook does not exist
import com.facebook.FacebookCallback;
                   ^
Main.java:12: error: package com.facebook does not exist
import com.facebook.FacebookException;
                   ^
Main.java:13: error: package com.facebook does not exist
import com.facebook.FacebookSdk;
                   ^
Main.java:14: error: package com.facebook does not exist
import com.facebook.GraphRequest;
                   ^
Main.java:15: error: package com.facebook does not exist
import com.facebook.GraphResponse;
                   ^
Main.java:16: error: package com.facebook.login does not exist
import com.facebook.login.LoginBehavior;
                         ^
Main.java:17: error: package com.facebook.login does not exist
import com.facebook.login.LoginManager;
                         ^
Main.java:18: error: package com.facebook.login does not exist
import com.facebook.login.LoginResult;
                         ^
Main.java:19: error: package com.facebook.login.widget does not exist
import com.facebook.login.widget.LoginButton;
                                ^
Main.java:21: error: package org.json does not exist
import org.json.JSONObject;
               ^
Main.java:26: error: cannot find symbol
public class MainActivity extends AppCompatActivity {
                                  ^
  symbol: class AppCompatActivity
Main.java:27: error: cannot find symbol
    CallbackManager callbackManager;
    ^
  symbol:   class CallbackManager
  location: class MainActivity
Main.java:28: error: cannot find symbol
    AccessToken accessToken;
    ^
  symbol:   class AccessToken
  location: class MainActivity
Main.java:29: error: cannot find symbol
    TextView mTextView ;
    ^
  symbol:   class TextView
  location: class MainActivity
Main.java:31: error: cannot find symbol
    protected void onCreate(Bundle savedInstanceState) {
                            ^
  symbol:   class Bundle
  location: class MainActivity
Main.java:77: error: cannot find symbol
    protected void onActivityResult(int requestCode,int resultCode,Intent data) {
                                                                   ^
  symbol:   class Intent
  location: class MainActivity
Main.java:30: error: method does not override or implement a method from a supertype
    @Override
    ^
Main.java:32: error: cannot find symbol
        FacebookSdk.sdkInitialize(getApplicationContext());
                                  ^
  symbol:   method getApplicationContext()
  location: class MainActivity
Main.java:32: error: cannot find symbol
        FacebookSdk.sdkInitialize(getApplicationContext());
        ^
  symbol:   variable FacebookSdk
  location: class MainActivity
Main.java:33: error: cannot find symbol
        super.onCreate(savedInstanceState);
        ^
  symbol:   variable super
  location: class MainActivity
Main.java:34: error: package R does not exist
        setContentView(R.layout.activity_main);
                        ^
Main.java:35: error: package CallbackManager does not exist
        callbackManager = CallbackManager.Factory.create();
                                         ^
Main.java:36: error: cannot find symbol
        mTextView = (TextView)findViewById(R.id.text);
                     ^
  symbol:   class TextView
  location: class MainActivity
Main.java:36: error: package R does not exist
        mTextView = (TextView)findViewById(R.id.text);
                                            ^
Main.java:37: error: cannot find symbol
        LoginButton loginButton = (LoginButton) findViewById(R.id.login_button);
        ^
  symbol:   class LoginButton
  location: class MainActivity
Main.java:37: error: cannot find symbol
        LoginButton loginButton = (LoginButton) findViewById(R.id.login_button);
                                   ^
  symbol:   class LoginButton
  location: class MainActivity
Main.java:37: error: package R does not exist
        LoginButton loginButton = (LoginButton) findViewById(R.id.login_button);
                                                              ^
Main.java:39: error: cannot find symbol
        loginButton.setLoginBehavior(LoginBehavior.WEB_VIEW_ONLY);
                                     ^
  symbol:   variable LoginBehavior
  location: class MainActivity
Main.java:40: error: cannot find symbol
        LoginManager.getInstance().logInWithReadPermissions(this,Arrays.asList("email"));
        ^
  symbol:   variable LoginManager
  location: class MainActivity
Main.java:41: error: cannot find symbol
        loginButton.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
                                                          ^
  symbol:   class FacebookCallback
  location: class MainActivity
Main.java:41: error: cannot find symbol
        loginButton.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
                                                                           ^
  symbol:   class LoginResult
  location: class MainActivity
Main.java:76: error: method does not override or implement a method from a supertype
    @Override
    ^
Main.java:78: error: cannot find symbol
        super.onActivityResult(requestCode, resultCode, data);
        ^
  symbol:   variable super
  location: class MainActivity
41 errors

Standard output is empty