我正在制作一个名为“ BrandShopping”的应用。该应用程序旨在用于在线交付和购物。这就是为什么我需要不同的登录方法，以便用户可以选择自己认为最舒适的方式。
我遇到的问题是我的Facebook登录名。我不太了解自己在做什么错。我主要在使用RegisterCallback()函数时遇到问题。
问题是使用登录按钮（在本例中为RegisterCallback()）将应用指定为RegisterWithFacebookBtn。在OnSuccess()方法中，我指定了应用程序以调用名为FetchUserData()的方法，该方法应该从Facebook数据库中读取用户的信息。在该方法的稍后部分，我使应用程序检查了用户是否登录。如果这是true：goto AccountinfoActivity（另一项活动），但从未执行。
我已经尝试调试应用程序，但是我不明白程序有什么问题。我确实有一个祝酒词，如果registerCallback()成功了，该祝酒词会显示，但它不会显示祝酒词。
我的代码如下：
package com.brandshopping.brandshopping;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.nfc.Tag;
import android.os.Bundle;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import com.facebook.AccessToken;
import com.facebook.AccessTokenTracker;
import com.facebook.CallbackManager;
import com.facebook.FacebookCallback;
import com.facebook.FacebookException;
import com.facebook.GraphRequest;
import com.facebook.GraphResponse;
import com.facebook.login.LoginManager;
import com.facebook.login.LoginResult;
import com.facebook.login.widget.LoginButton;
import com.google.android.gms.auth.api.Auth;
import com.google.android.gms.auth.api.signin.GoogleSignIn;
import com.google.android.gms.auth.api.signin.GoogleSignInAccount;
import com.google.android.gms.auth.api.signin.GoogleSignInClient;
import com.google.android.gms.auth.api.signin.GoogleSignInOptions;
import com.google.android.gms.auth.api.Auth;
import com.google.android.gms.common.api.ApiException;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.AuthCredential;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.auth.GoogleAuthProvider;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.Arrays;
import java.util.HashMap;
public class LoginOrSignupActivity extends AppCompatActivity {
private Button LoginBtn, RegisterWithEmailBtn, RegisterWithGoogleBtn;
private String Tag;
private ProgressDialog LoadingBar;
private LoginButton RegisterWithFacebookBtn;
private FirebaseDatabase firebasedatabase = FirebaseDatabase.getInstance();
private DatabaseReference database = firebasedatabase.getReference();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login_or_signup);
LoadinGUI(); //LOAD IN THE GRAPHICAL USER INTERFACE
GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
.requestIdToken(getString(R.string.default_web_client_id))
.requestEmail()
.build();
LoginBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
startActivity(new Intent(LoginOrSignupActivity.this, LogInActivity.class));
}
});
RegisterWithEmailBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
startActivity(new Intent(LoginOrSignupActivity.this, RegisterActivity.class));
}
});
RegisterWithGoogleBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
signIn(); //SIGN IN WITH GOOGLE
}
});
RegisterWithFacebookBtn.setOnClickListener(new View.OnClickListener() { //REGISTRATION WITH FACEBOOK
@Override
public void onClick(View view) {
SignInWithFacebook();
}
});
}
private void SignInWithFacebook(){ //FOR FACEBOOK LOGIN
CallbackManager callbackManager = CallbackManager.Factory.create();
IfLoggedIn();
Log.d("SignInWithFacebook: ", "Initiating");
RegisterWithFacebookBtn.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
Toast.makeText(LoginOrSignupActivity.this, "Part one succeded", Toast.LENGTH_SHORT).show();
AccessToken accessToken = loginResult.getAccessToken();
FetchUserData(accessToken);
Log.d("SignInWithFacebook: ", "Succeded");
}
@Override
public void onCancel() {
Log.d("SignInWithFacebook: ", "Cancled");
}
@Override
public void onError(FacebookException error) {
Log.d("mTAG",error.getMessage());
Log.d("SignInWithFacebook: ", "Failed");
}
});
}
private void IfLoggedIn(){
AccessToken accessToken = AccessToken.getCurrentAccessToken();
if (accessToken != null){
FetchUserData(accessToken);
}
}
private void FetchUserData(final AccessToken accessToken){ //FOR FACEBOOK LOGIN, ALSO SAVES TO THE FIREBASE DATABSE
GraphRequest request = GraphRequest.newMeRequest(accessToken, new GraphRequest.GraphJSONObjectCallback() {
@Override
public void onCompleted(JSONObject object, GraphResponse response) {
try {
final String first_name = object.getString("first_name");
final String last_name = object.getString("last_name");
final String email = object.getString("email");
final String emailwithAtheraRemoved = email.replace(".", " ");
//ADD MORE HERE
database.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
if (!(dataSnapshot.child("Users").child(emailwithAtheraRemoved).exists())){
LoadingBar.setMessage("Please wait while we load the credentialls in");
LoadingBar.setTitle("Register");
LoadingBar.setCanceledOnTouchOutside(false);
LoadingBar.show();
HashMap<String, Object> Userdatamap = new HashMap<>();
Userdatamap
.put("Created with: ", "Integrated Facebook login");
Userdatamap
.put("Email", email);
Userdatamap
.put("Name", first_name + " " + last_name);
Userdatamap
.put("Phone number", "Facebook intigrated sign in does not allow phone number requesting... This will be fixed in later patches");
database
.child("Users")
.child(emailwithAtheraRemoved)
.updateChildren(Userdatamap)
.addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
LoadingBar.dismiss();
Toast.makeText(LoginOrSignupActivity.this, "Database save successful", Toast.LENGTH_SHORT).show();
startActivity(new Intent(LoginOrSignupActivity.this, AccountInfoActivity.class));
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Toast.makeText(LoginOrSignupActivity.this, "Registration failed", Toast.LENGTH_SHORT).show();
Log.e(Tag, "error: ");
}
});
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
//WHEN EVERYTHING IS DONE AND EVERYTHING SUCCEDES, GO TO ACCOUNTINFOACTIVITY ACTIVITY, MAY NEED TO BE MODIFIED LATER ON
} catch (JSONException e) {
e.printStackTrace();
}
}
});
Bundle parameters = new Bundle();
parameters.putString("fileds", "id, first_name, last_name, email");
request.setParameters(parameters);
request.executeAsync();
}
private void signIn() { //Google sign in
GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN) //google object
.requestIdToken(getString(R.string.default_web_client_id))
.requestEmail()
.build();
GoogleSignInClient mGoogleSignInClient = GoogleSignIn.getClient(LoginOrSignupActivity.this, gso); //Create Google sign in object
//GOOGLE OBJECT
Intent signInIntent = mGoogleSignInClient.getSignInIntent();
startActivityForResult(signInIntent, 1);
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) { //STARTACTIVITYFORRESULT, 1 = GOOGLE, 2 = FACEBOOK INTEGRATED LOGIN
super.onActivityResult(requestCode, resultCode, data);
// Result returned from launching the Intent from GoogleSignInClient.getSignInIntent(...);
if (requestCode == 1) {
// The Task returned from this call is always completed, no need to attach
// a listener.
Task<GoogleSignInAccount> task = GoogleSignIn.getSignedInAccountFromIntent(data);
handleSignInResult(task);
}else{
CallbackManager callbackManager = CallbackManager.Factory.create(); //Create a callbackmaneger (register for facebook) object
callbackManager.onActivityResult(requestCode, resultCode, data);
super.onActivityResult(requestCode, resultCode, data);
}
}
private void handleSignInResult(Task<GoogleSignInAccount> completedTask) { //HANDLE SIGN IN RESULTS / VALIDATE ACCOUNT INFO
try {
GoogleSignInAccount account = completedTask.getResult(ApiException.class);
Toast.makeText(this, "Register/signin successful", Toast.LENGTH_SHORT).show();
startActivity(new Intent(LoginOrSignupActivity.this, AccountInfoActivity.class));
firebaseAuthWithGoogle(account);
SaveToDataBase();
} catch (ApiException e) {
// The ApiException status code indicates the detailed failure reason.
// Please refer to the GoogleSignInStatusCodes class reference for more information.
Toast.makeText(this, "Log in failed", Toast.LENGTH_SHORT).show();
Log.e(Tag, "error: ");
startActivity(new Intent(LoginOrSignupActivity.this, AccountInfoActivity.class));
}
}
void SaveToDataBase() { //SAVE TO THE FIREBASE REALTIME DATABASE
database.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
GoogleSignInAccount Guser = GoogleSignIn.getLastSignedInAccount(LoginOrSignupActivity.this);
String EmailWithEtheraRemoved = Guser.getEmail().replace(".", " ");
if (!(dataSnapshot.child("Users").child(EmailWithEtheraRemoved).exists())) {
LoadingBar.setMessage("Please wait while we load the credentialls in");
LoadingBar.setTitle("Register");
LoadingBar.setCanceledOnTouchOutside(false);
LoadingBar.show();
HashMap<String, Object> Userdatamap = new HashMap<>();
Userdatamap
.put("Email", Guser.getEmail());
Userdatamap
.put("Phone number", "Google intigrated sign in does not allow phone number requesting... This will be fixed in later patches");
Userdatamap
.put("Name", Guser.getGivenName() + Guser.getFamilyName());
if (Guser != null) {
Userdatamap
.put("Created with", "Intigrated Google sign in");
}
database
.child("Users")
.child(EmailWithEtheraRemoved)
.updateChildren(Userdatamap)
.addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
LoadingBar.dismiss();
Toast.makeText(LoginOrSignupActivity.this, "Database save successful", Toast.LENGTH_SHORT).show();
startActivity(new Intent(LoginOrSignupActivity.this, AccountInfoActivity.class));
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Toast.makeText(LoginOrSignupActivity.this, "Registration failed", Toast.LENGTH_SHORT).show();
Log.e(Tag, "error: ");
}
});
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
private void firebaseAuthWithGoogle(GoogleSignInAccount acct) { //SAVE GOOGLE ACCOUNT INFO TO THE FIREBASE AUTHENTICATION DATABASE
Log.d("authenticate", "firebaseAuthWithGoogle:" + acct.getId());
final FirebaseAuth mAuth = FirebaseAuth.getInstance();
final GoogleSignInAccount Guser = GoogleSignIn.getLastSignedInAccount(LoginOrSignupActivity.this);
AuthCredential credential =
GoogleAuthProvider.getCredential(acct.getIdToken(), null);
mAuth.signInWithCredential(credential)
.addOnCompleteListener(this, new OnCompleteListener<AuthResult>()
{
@Override
public void onComplete(@NonNull Task<AuthResult> task)
{
if (task.isSuccessful()) {
// Sign in success, update UI with the signed-in user's information
Log.d("message","signInWithCredential:success");
Log.d("user id", Guser.getId());
} else {
// If sign in fails, display a message to the user.
Log.w("message","signInWithCredential:failure", task.getException());
}
}
});
}
private void LoadinGUI() { //CREATE ALL OBJECTS FOR THE GRAPHICAL USER INTERFACE (GUI)
CallbackManager callbackManager = CallbackManager.Factory.create(); //NEEDED FOR FACEBOOK LOGIN
final String EMAIL = "email";
LoadingBar = new ProgressDialog(LoginOrSignupActivity.this);
LoginBtn = (Button) findViewById(R.id.Login_btn);
RegisterWithEmailBtn = (Button) findViewById(R.id.Register_WithEmail_btn);
RegisterWithGoogleBtn = (Button) findViewById(R.id.Register_WithGoogle_btn);
RegisterWithFacebookBtn = (LoginButton) findViewById(R.id.Register_WithFacebook_btn);
RegisterWithFacebookBtn.setReadPermissions(Arrays.asList("email")); //ADD PERMISSIONS, HAVE TO ADD TO BE ABLE TO READ THINGS
}
}
任何帮助都将不胜感激