android - 如何检查用户是否使用谷歌登录，以及是否直接定向到 Activity

Question

我正在做一个你用谷歌登录的 Activity ，我拥有的一切都很好，但我需要检查用户是否已经登录，然后将我定向到“MainActivity”

相关代码:

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


    mGoogleApi = new GoogleApiClient.Builder(this).enableAutoManage(this, new GoogleApiClient.OnConnectionFailedListener() {
        @Override
        public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {

        }
    }).addApi(Auth.GOOGLE_SIGN_IN_API, gso).build();



}

private void sigInGoogle(){
Intent intent = Auth.GoogleSignInApi.getSignInIntent(mGoogleApi);
    startActivityForResult(intent, RC_SIGN_IN);

}

private void handleResult(GoogleSignInResult result){

    if(result.isSuccess()){
        Intent intent1 = new Intent(RegisterActivity.this, UserActivity.class);
        intent1.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
        startActivity(intent1);

    }
}


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

    if(requestCode == RC_SIGN_IN){
        GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data);
        handleResult(result);

    }
}

Answer 1

您可以使用 user.getProviders().get(0) 检查身份验证提供程序；这将返回登录提供程序。如果 user!=null，请在 AuthStateListener 中使用它。