android - GoogleSignInAccount getIdToken() 为空

Question

嘿，我正在使用 Firebase 身份验证并启用了 Google 登录 功能。Google 登录运行良好，我获得了所有信息。但是当我想将用户保存在 Firebase 用户列表中时，getIdToken() 为空:

private void firebaseAuthWithGoogle(GoogleSignInAccount acct) {       

    //here the acct.getIdToken() is null

    AuthCredential credential = GoogleAuthProvider.getCredential(acct.getIdToken(), null);
    firebaseAuth.signInWithCredential(credential)
      .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
          @Override
          public void onComplete(@NonNull Task<AuthResult> task) {
              if (!task.isSuccessful()) {
                  Toast.makeText(SignIn.this, "Authentication failed.", Toast.LENGTH_SHORT).show();
              }

              // [START_EXCLUDE]
              progressDialog.hide();
              // [END_EXCLUDE]
          }
      });

}

Answer 1

也许您忘记了在您的 GoogleSignInOptions 对象上使用 requestIdToken()

尝试一下:

GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
                .requestIdToken(getString(R.string.default_web_client_id))
                .requestEmail()
                .build();