How to invoke virtual method 'java.lang.String org.json.JSONObject.getString(java.lang.String)' on a null object reference – Facebook api

I am using Facebook Login for my app that uses firebase. When user logs in, the app is supposed to pull info from Facebook such as name, email, gender, location, bio, ect. This worked fine before I updated to Android Studio 2.2. Now after the update I’m getting the error

Attempt to invoke virtual method ‘java.lang.String org.json.JSONObject.getString(java.lang.String)’ on a null object reference.

The account is saved to firebase but after login the app crashes. I can’t tell if this is anise with the emulator(Nexus 6 API 23), or if something happened to my code.

Logcat

10-27 08:23:07.965 15474-15474/com.rograb.workorderapp D/LOGIN DEBUG:facebook:onSuccess:com.facebook.login.LoginResult@47060b7
10-27 08:23:07.965 15474-15474/com.rograb.workorderapp D/LOGIN DEBUG: handleFacebookAccessToken:{AccessToken token:ACCESS_TOKEN_REMOVED permissions:[public_profile, contact_email, user_friends, user_likes, email, user_location]}
10-27 08:23:07.967 15474-15487/com.rograb.workorderapp W/DynamiteModule: Local module descriptor class for com.google.firebase.auth not found.
10-27 08:23:07.971 15474-16534/com.rograb.workorderapp V/FA: Activity resumed, time: 1301956
10-27 08:23:07.973 15474-15487/com.rograb.workorderapp W/DynamiteModule: Local module descriptor class for com.google.firebase.auth not found.
10-27 08:23:07.986 15474-15533/com.rograb.workorderapp E/Surface: getSlotFromBufferLocked: unknown buffer: 0xb2c3e080
10-27 08:23:08.366 15474-15474/com.rograb.workorderapp D/AndroidRuntime: Shutting down VM
10-27 08:23:08.366 15474-15474/com.rograb.workorderapp E/AndroidRuntime: FATAL EXCEPTION: main
                                                                     Process: com.rograb.workorderapp, PID: 15474
                                                                     java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String org.json.JSONObject.getString(java.lang.String)' on a null object reference
                                                                         at com.rograb.workorderapp.models.UserModel.fromJSON(UserModel.java:117)
                                                                         at com.rograb.workorderapp.activities.LoginActivity$2$1.onCompleted(LoginActivity.java:106)
                                                                         at com.facebook.GraphRequest$1.onCompleted(GraphRequest.java:304)
                                                                         at com.facebook.GraphRequest$5.run(GraphRequest.java:1383)
                                                                         at android.os.Handler.handleCallback(Handler.java:739)
                                                                         at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                         at android.os.Looper.loop(Looper.java:148)
                                                                         at android.app.ActivityThread.main(ActivityThread.java:5417)
                                                                         at java.lang.reflect.Method.invoke(Native Method)
                                                                         at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
                                                                         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
10-27 08:23:11.904 15474-15474/com.rograb.workorderapp I/Process: Sending signal. PID: 15474 SIG: 9

UserModel

public class UserModel {

private String id;
private String name;
private String email;
private String gender;
private String locationId;
private String locationName;
private String bio;
private String languages;
private ArrayList<TripModel> favorites = new ArrayList<>();

private HashMap<String, Object> timestampJoined;

public UserModel() {
}

public UserModel(String name, String email, HashMap<String, Object> timestampJoined) {
    this.name = name;
    this.email = email;
    this.timestampJoined = timestampJoined;
}

public String getId() {
    return id;
}

public void setId(String id) {
    this.id = id;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public String getEmail() {
    return email;
}

public void setEmail(String email) {
    this.email = email;
}

public String getGender() {
    return gender;
}

public void setGender(String gender) {
    this.gender = gender;
}

public String getLocationId() {
    return locationId;
}

public void setLocationId(String locationId) {
    this.locationId = locationId;
}

public String getLocationName() {
    return locationName;
}

public void setLocationName(String locationName) {
    this.locationName = locationName;
}

public String getBio() {
    return bio;
}

public void setBio(String bio) {
    this.bio = bio;
}

public String getLanguages() {
    return languages;
}

public void setLanguages(String languages) {
    this.languages = languages;
}

public HashMap<String, Object> getTimestampJoined() {
    return timestampJoined;
}

public void setTimestampJoined(HashMap<String, Object> timestampJoined) {
    this.timestampJoined = timestampJoined;
}

public ArrayList<TripModel> getFavorites() {
    return favorites;
}

public void setFavorites(ArrayList<TripModel> favorites) {
    this.favorites = favorites;
}

public static UserModel fromJSON(JSONObject jsonObject){
    UserModel user = new UserModel();

    try {
        user.id = jsonObject.getString("id");
        user.name = jsonObject.getString("name");
        user.email = jsonObject.getString("email");
        user.gender = jsonObject.getString("gender");
        user.locationId = jsonObject.getJSONObject("location").getString("id");
        user.locationName = jsonObject.getJSONObject("location").getString("name");
        user.languages = "";

    } catch (JSONException e) {
        e.printStackTrace();
    }

    return user;
}
}

LoginActivity

public class LoginActivity extends AppCompatActivity {

private static final String TAG = "LOGIN DEBUG";
@BindView(R.id.btnFacebookLogin)
LoginButton btnFacebookLogin;

CallbackManager callbackManager;
private FirebaseAuth mAuth;
private FirebaseAuth.AuthStateListener mAuthListener;
UserModel userModel = new UserModel();

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_login);
    ButterKnife.bind(this);

    final WorkOrderApplication app = (WorkOrderApplication) getApplicationContext();

    // Initialize Firebase Auth
    mAuth = FirebaseAuth.getInstance();
    mAuthListener = new FirebaseAuth.AuthStateListener() {
        @Override
        public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
            FirebaseUser user = firebaseAuth.getCurrentUser();
            if (user != null) {
                // User is signed in
                Log.d(TAG, "onAuthStateChanged:signed_in:" + user.getUid());

                if (user.getEmail() == null || user.getEmail().equals(""))
                    user.updateEmail(userModel.getEmail());

                if (user.getUid() != null) {
                    setAuthenticatedUserFacebook(firebaseAuth);
                    onLoginSuccess();
                }

            } else {
                // User is signed out
                Log.d(TAG, "onAuthStateChanged:signed_out");
            }
        }
    };


    // Initialize Facebook Login button
    callbackManager = CallbackManager.Factory.create();

    btnFacebookLogin.setReadPermissions(Arrays.asList("public_profile", "email", "user_location", "user_friends", "user_likes"));
    btnFacebookLogin.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
        @Override
        public void onSuccess(LoginResult loginResult) {
            Log.d(TAG, "facebook:onSuccess:" + loginResult);

            handleFacebookAccessToken(loginResult.getAccessToken());

            // App code
            GraphRequest request = GraphRequest.newMeRequest(
                    loginResult.getAccessToken(),
                    new GraphRequest.GraphJSONObjectCallback() {
                        @Override
                        public void onCompleted(JSONObject object, GraphResponse response) {

                            userModel = UserModel.fromJSON(object);
                            app.setUserInfo(userModel);

                        }
                    });

            Bundle parameters = new Bundle();
            parameters.putString("fields", "id,name,email,gender,location,bio,languages");
            request.setParameters(parameters);
            request.executeAsync();

        }

        @Override
        public void onCancel() {
            Log.d(TAG, "facebook:onCancel");

        }

        @Override
        public void onError(FacebookException error) {
            Log.d(TAG, "facebook:onError", error);
        }
    });

}

private void setAuthenticatedUserFacebook(FirebaseAuth firebaseAuth) {

    final String userEncondedEmail = Utilities.encodeEmail(firebaseAuth.getCurrentUser().getEmail());
    String userName = firebaseAuth.getCurrentUser().getDisplayName();

    HashMap<String, Object> timestampJoined = new HashMap<>();
    timestampJoined.put(Constants.FIREBASE_PROPERTY_TIMESTAMP, ServerValue.TIMESTAMP);

    final WorkOrderApplication app = (WorkOrderApplication) getApplicationContext();

    //Save user in firebase
    final UserModel user = new UserModel(userName, userEncondedEmail, timestampJoined);

    app.getUsersReference().child(userEncondedEmail).addListenerForSingleValueEvent(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            if (dataSnapshot.getValue() == null) {
                app.getUsersReference().child(userEncondedEmail).setValue(user);
            }
        }

        @Override
        public void onCancelled(DatabaseError databaseError) {
        }
    });
}

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

@Override
public void onStart() {
    super.onStart();
    mAuth.addAuthStateListener(mAuthListener);
}

@Override
public void onStop() {
    super.onStop();
    if (mAuthListener != null) {
        mAuth.removeAuthStateListener(mAuthListener);
    }
}

public void onLoginSuccess() {


    Intent i = new Intent(this, JobListActivity.class);
    i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP
            | Intent.FLAG_ACTIVITY_NEW_TASK
            | Intent.FLAG_ACTIVITY_CLEAR_TASK);
    startActivity(i);
    finish();

}

private void handleFacebookAccessToken(AccessToken token) {
    Log.d(TAG, "handleFacebookAccessToken:" + token);

    AuthCredential credential = FacebookAuthProvider.getCredential(token.getToken());
    mAuth.signInWithCredential(credential)
            .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
                @Override
                public void onComplete(@NonNull Task<AuthResult> task) {
                    Log.d(TAG, "signInWithCredential:onComplete:" + task.isSuccessful());

                    // If sign in fails, display a message to the user. If sign in succeeds
                    // the auth state listener will be notified and logic to handle the
                    // signed in user can be handled in the listener.
                    if (!task.isSuccessful()) {
                        Log.w(TAG, "signInWithCredential", task.getException());
                        Toast.makeText(LoginActivity.this, "Authentication failed.",
                                Toast.LENGTH_SHORT).show();
                    } else {
                        onLoginSuccess();
                    }


                }
            });
}

}

build.gradle

android {
compileSdkVersion 24
buildToolsVersion "24.0.0"
defaultConfig {
    applicationId "com.rograb.workorderapp"
    minSdkVersion 16
    targetSdkVersion 24
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    externalNativeBuild {
        cmake {
            cppFlags ""
        }
    }
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}
externalNativeBuild {
    cmake {
        path "CMakeLists.txt"
    }
}
}
repositories {
mavenCentral()
}

dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
    exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.android.support:appcompat-v7:24.0.0'
testCompile 'junit:junit:4.12'
apt 'com.jakewharton:butterknife-compiler:8.2.1'

apt 'org.parceler:parceler:1.1.1'
compile 'com.android.support:appcompat-v7:24.2.0'
compile 'com.android.support:design:24.2.0'
compile 'com.android.support:cardview-v7:24.2.0'
compile 'com.android.support:recyclerview-v7:24.2.0'
compile 'com.squareup.picasso:picasso:2.5.2'
compile 'com.google.firebase:firebase-auth:9.4.0'
compile 'com.facebook.android:facebook-android-sdk:[4,5)'
compile 'com.jakewharton:butterknife:8.2.1'
compile 'org.parceler:parceler-api:1.1.1'
compile 'com.google.firebase:firebase-database:9.4.0'
compile 'com.firebaseui:firebase-ui-database:0.5.1'
compile 'com.google.android.gms:play-services-location:9.4.0'
compile 'com.google.android.gms:play-services-maps:9.4.0'
compile 'com.google.android.gms:play-services-places:9.4.0'
compile 'com.firebase:geofire-android:2.1.0'
compile 'com.github.qiugang:EditTag:v1.2.3'
compile 'com.astuetz:pagerslidingtabstrip:1.0.1'
compile 'com.android.support:support-v4:24.2.0'
}
apply plugin: 'com.google.gms.google-services'

ProfileActivity

public class ProfileActivity extends AppCompatActivity implements OnMapReadyCallback {

WorkOrderApplication app;
private GoogleMap mMap;

@BindView(R.id.ivProfile)
ProfilePictureView ivProfile;
@BindView(R.id.tvBio)
TextView tvBio;
@BindView(R.id.tvEmail)
TextView tvEmail;
@BindView(R.id.app_bar)
AppBarLayout appBar;
@BindView(R.id.toolbar)
Toolbar toolbar;
@BindView(R.id.tvUserName)
TextView tvUserName;
@BindView(R.id.tvLocationName)
TextView tvLocationName;
@BindView(R.id.toolbar_layout)
CollapsingToolbarLayout collapsingToolbarLayout;
@BindView(R.id.tvLanguages)
TextView tvLanguages;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_profile);
    ButterKnife.bind(this);

    setSupportActionBar(toolbar);

    SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
    mapFragment.getMapAsync(this);

    app = (WorkOrderApplication) getApplicationContext();

}

@Override
public void onBackPressed() {
    finish();
    overridePendingTransition(R.anim.left_in, R.anim.right_out);
}

@Override
public void onMapReady(GoogleMap googleMap) {
    mMap = googleMap;
    setUserInformation();

}

private void setUserInformation() {

    UserModel user = app.getUserInfo();

    ivProfile.setProfileId(user.getId());
    tvUserName.setText(user.getName());
    tvLocationName.setText(user.getLocationName());

    tvBio.setText(user.getBio());
    if (user.getBio().equals(Constants.EMPTY_STRING)) {
        tvBio.setVisibility(View.GONE);
    }
    tvEmail.setText(user.getEmail());
    //tvLanguages.setText(user.getLanguages());

    //Set marker in User location
    LatLng userLatLong = getUserLatLong(user.getLocationName());
    mMap.addMarker(new MarkerOptions()
            .position(userLatLong)
            .icon(BitmapDescriptorFactory.fromBitmap(Utilities.writeTextOnDrawable(this, R.drawable.user_marker, "")))
            .title(user.getLocationName()));

    mMap.moveCamera(CameraUpdateFactory.newLatLng(userLatLong));
    mMap.animateCamera(CameraUpdateFactory.zoomTo(5.0f));

    //Collapsing Toolbar options
    collapsingToolbarLayout.setExpandedTitleColor(Color.TRANSPARENT);
    //collapsingToolbarLayout.setTitle(user.getName());
    collapsingToolbarLayout.setTitle(" ");
    CoordinatorLayout.LayoutParams params = (CoordinatorLayout.LayoutParams) appBar.getLayoutParams();
    AppBarLayout.Behavior behavior = new AppBarLayout.Behavior();
    behavior.setDragCallback(new AppBarLayout.Behavior.DragCallback() {
        @Override
        public boolean canDrag(@NonNull AppBarLayout appBarLayout) {
            return false;
        }
    });
    params.setBehavior(behavior);

}

private LatLng getUserLatLong(String locationName) {

    LatLng userLatLong = null;
    if (Geocoder.isPresent()) {
        try {
            Geocoder gc = new Geocoder(this);
            List<Address> addresses = gc.getFromLocationName(locationName, 1); // get the found Address Objects

            for (Address a : addresses) {
                if (a.hasLatitude() && a.hasLongitude()) {
                    userLatLong = new LatLng(a.getLatitude(), a.getLongitude());
                }
            }
        } catch (IOException e) {
            Log.e("Geocoder Error", e.toString());
        }
    }

    return userLatLong;
}

}