失败firebase身份验证facebook

问题描述：

我试图做一个身份验证与facebook上的firebase。我已经设置了Facebook SDK，我可以完美地登录Facebook。失败firebase身份验证facebook

但我无法获取Firebase身份验证工作。该应用程序在方法onComplete(Task <AuthResult> task)上有TOAST，如果在该过程中出现问题，它将显示出来。我收到了这个TOAST错误，但找不到问题出在哪里。我已经在Firebase文档中设置了所有内容。

public class LoginActivity extends AppCompatActivity { 
    private LoginButton loginButton; 
    private CallbackManager callbackManager; 

    private FirebaseAuth firebaseAuth; 
    private FirebaseAuth.AuthStateListener firebaseAuthListener; 

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

     firebaseAuth = FirebaseAuth.getInstance(); 

     callbackManager = CallbackManager.Factory.create(); 
     loginButton = (LoginButton) findViewById(R.id.loginButton); 
     loginButton.setReadPermissions("email","public_profile"); 
     loginButton.registerCallback(callbackManager, new FacebookCallback<LoginResult>() { 
      @Override 
      public void onSuccess(LoginResult loginResult) { 
       handleFacebookAccessToken(loginResult.getAccessToken()); 
      } 

      @Override 
      public void onCancel() { 
       Toast.makeText(getApplicationContext(),"Error al iniciar sesión",Toast.LENGTH_LONG).show(); 

      } 

      @Override 
      public void onError(FacebookException error) { 
       Toast.makeText(getApplicationContext(),"Error al iniciar sesión",Toast.LENGTH_LONG).show(); 
      } 
     }); 

     firebaseAuthListener = new FirebaseAuth.AuthStateListener(){ 

      @Override 
      public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) { 
       FirebaseUser user = firebaseAuth.getCurrentUser(); 
       if (user != null) { 
        goMainScreen(); 
       } 
      } 
     }; 
    } 

    private void handleFacebookAccessToken(AccessToken accessToken) { 
     Log.d("","handle"+accessToken.getCurrentAccessToken().getToken()); 
     AuthCredential credential = FacebookAuthProvider.getCredential(accessToken.getCurrentAccessToken().getToken()); 
     firebaseAuth.signInWithCredential(credential).addOnCompleteListener(this, new OnCompleteListener<AuthResult>() { 
      @Override 
      public void onComplete(@NonNull Task<AuthResult> task) { 
       FirebaseUser user = firebaseAuth.getCurrentUser(); 
       if (user != null) { 
        Toast.makeText(getApplicationContext(), "hi", Toast.LENGTH_LONG).show(); 
       }else { 
        Toast.makeText(getApplicationContext(), "error", Toast.LENGTH_LONG).show(); // here is the ERROR. 

       } 
      } 
     }); 

    } 


    private void goMainScreen() { 
     Intent intent = new Intent(this, MainActivity.class); 
     intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK); 
     startActivity(intent); 
    } 

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

    @Override 
    protected void onStart() { 
     super.onStart(); 
     firebaseAuth.addAuthStateListener(firebaseAuthListener); 
    } 

    @Override 
    protected void onStop() { 
     super.onStop(); 
     firebaseAuth.removeAuthStateListener(firebaseAuthListener); 
    } 

}

我已经在firebase上启用了Facebook身份验证，并且已经复制了ID和密码。此外，我已经在Facebook开发者中复制了Firebase网址。

该任务包含可帮助您排除故障的错误信息。不要在烤面包中显示“错误”，而要显示“任务”。 getException（）。toString（）'或更好：用'throw task.getException（）'抛出异常。 –

@FrankvanPuffelen谢谢!!!这工作！错误esa，我有另一个现有的帐户与Facebook相同的电子邮件...非常感谢坦率 –

答

该任务包含可帮助您排除故障的错误信息。而不是在烤面包片中显示"error"，显示task.getException().toString()或更好：与throw task.getException()抛出异常。

失败firebase身份验证facebook

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