following facebook login: setReadPermissions and registerCallback giving me error - facebook

Question

trying to use FB login, followed their steps, but Android Studio gives me error: Cannot resolve methods .setReadPermissions and .registerCallback...
am new to this development and tech world... please, help! What am I doing wrong? Looked through many Q&A here, but none is giving me answers. Help much appreciated. Thanks!
I am trying to build a simple OCR app, with FB, Google logins and one independent register button. Code for registration class as follows:
public class Registration extends AppCompatActivity {
DatabaseHelper databaseHelper;
CallbackManager callbackManager;
GoogleSignInClient mGoogleSignInClient;
private static final String TAG = "AndroidClarified";
EditText et_username, et_password, et_cpassword, et_email;
RadioGroup radioSexGroup;
RadioButton radioSexButton;
Button btn_register, btnFBLogin, google_button;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_registration);
try {
FacebookSdk.sdkInitialize(getApplicationContext());
AppEventsLogger.activateApp(this);
} catch (Exception ex) {
Log.e(TAG, ex.getMessage());
}
AccessToken accessToken = AccessToken.getCurrentAccessToken();
Profile profile = Profile.getCurrentProfile();
boolean isLoggedIn = accessToken != null && !accessToken.isExpired();
google_button = findViewById(R.id.google_button);
GoogleSignInOptions gso = new
GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
.requestIdToken(getResources().getString(R.string.web_client_id))
.requestEmail()
.build();
mGoogleSignInClient = GoogleSignIn.getClient(this, gso);
et_username = findViewById(R.id.et_username);
et_password = findViewById(R.id.et_password);
et_cpassword = findViewById(R.id.et_cpassword);
et_email = findViewById(R.id.et_email);
radioSexGroup = findViewById(R.id.radioGroup);
final int selectedId = radioSexGroup.getCheckedRadioButtonId();
radioSexButton = findViewById(selectedId);
btn_register.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String username = et_username.getText().toString();
String password = et_password.getText().toString();
String confirm_password = et_cpassword.getText().toString();
String email = et_email.getText().toString();
if (username.equals("") || password.equals("") ||
confirm_password.equals("") || email.isEmpty()) {
Toast.makeText(getApplicationContext(), "Fields Required",
Toast.LENGTH_SHORT).show();
} else {
if (password.equals(confirm_password)) {
boolean checkUsername =
databaseHelper.CheckUsername(username);
if (checkUsername) {
boolean insert = databaseHelper.Insert(username,
password, email);
if (insert) {
Toast.makeText(getApplicationContext(),
"Registered", Toast.LENGTH_SHORT).show();
et_username.setText("");
et_password.setText("");
et_cpassword.setText("");
et_email.setText("");
}
if (!isValidEmail(et_email.getText().toString())) { Toast.makeText(getApplicationContext(), "Email is not valid", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(getApplicationContext(), "Username already taken", Toast.LENGTH_SHORT).show();
}
} else {
Toast.makeText(getApplicationContext(), "Password does not match", Toast.LENGTH_SHORT).show();
}
}
}
}
private boolean isValidEmail(String email) {
return Patterns.EMAIL_ADDRESS.matcher(email).matches();
}
});
callbackManager = CallbackManager.Factory.create();
btnFBLogin = findViewById(R.id.btnFBLogin);
List permissionNeeds = Arrays.asList("email", "user_birthday", "gender");
btnFBLogin.performClick();
btnFBLogin.setReadPermissions(permissionNeeds);
btnFBLogin.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
#Override
public void onSuccess(LoginResult loginResult) {
// App code
if (AccessToken.getCurrentAccessToken() != null) {
GraphRequest request = GraphRequest.newMeRequest(AccessToken.getCurrentAccessToken(), new GraphRequest.GraphJSONObjectCallback() {
#Override
public void onCompleted(JSONObject object, GraphResponse response) {
JSONObject json = response.getJSONObject();
try {
if (json != null) {
String text = "<b>Name :</b> " + json.getString("name") + "<br><br><b>Email :</b> " + json.getString("email") + "<br><br><b>Profile link :</b> " + json.getString("link");
}
} catch (JSONException e) {
e.printStackTrace();
}
}
});
}
}
#Override
public void onCancel() {
Log.d("fb_login_sdk", "callback cancel");
}
#Override
public void onError(FacebookException exception) {
Log.d("fb_login_sdk", "callback onError");
}
});
google_button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent signInIntent = mGoogleSignInClient.getSignInIntent();
startActivityForResult(signInIntent, 101);
}
});
}
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
callbackManager.onActivityResult(requestCode, resultCode, data);
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == Activity.RESULT_OK)
switch (requestCode) {
case 101:
try {
// The Task returned from this call is always completed, no need to attach
// a listener.
Task<GoogleSignInAccount> task = GoogleSignIn.getSignedInAccountFromIntent(data);
GoogleSignInAccount account = task.getResult(ApiException.class);
String idToken = account.getIdToken();
onLoggedIn(account);
} catch (ApiException e) {
// The ApiException status code indicates the detailed failure reason.
Log.w(TAG, "signInResult:failed code=" + e.getStatusCode());
}
break;
}
}
private void onLoggedIn(GoogleSignInAccount mGoogleSignInAccount) {
Intent intent = new Intent(this, ProfileActivity.class);
intent.putExtra(ProfileActivity.GOOGLE_ACCOUNT, mGoogleSignInAccount);
startActivity(intent);
finish();
}
public void onStart() {
super.onStart();
GoogleSignInAccount account = GoogleSignIn.getLastSignedInAccount(this);
if (GoogleSignIn.getLastSignedInAccount(this) != null) {
Toast.makeText(this, "Already Logged In", Toast.LENGTH_SHORT).show();
onLoggedIn(account);
} else {
Log.d(TAG, "Not logged in");
}
}
}