尝试使用AWS Amplify从Android应用程序注册时遇到注册错误

Question

我正在处理一些注册过程的Android应用程序（原生Android），使用AWS放大和Cognito用户池从这个链接https://aws-amplify.github.io/docs/android/authentication#signup。

我已经做了，直到放大添加验证和放大推送。我的原始文件夹中有配置文件。在实现注册功能后，我在尝试从我的应用程序注册时遇到以下错误：

2019-10-23 19:40:05.317 10740-11563/com。实例myapplication E/登录：注册错误java。lang.NullPointerException:尝试调用虚拟方法“void com”。亚马逊。移动连接器。认知识别提供程序。CognitoUserPool。注册（java.lang.String、java.lang.String、com.amazonaws.mobileconnectors.cognitoidentityprovider.CognitoUserAttributes、java.util.Map、com.amazonaws.mobileconnectors.cognitoidentityprovider.handlers.SignUpHandler）’到com上的空对象引用。亚马逊。可移动的客户AWSMobileClient 11美元。在com上运行（AWSMobileClient.java:1710）。亚马逊。可移动的客户内部的1美元。在java上运行（InternalCallback.java:101）。朗。丝线。运行（Thread.java:764）

是否有人可以查看我的代码并建议可能的问题？

package com.example.myapplication;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import com.amazonaws.mobile.client.AWSMobileClient;
import com.amazonaws.mobile.client.Callback;
import com.amazonaws.mobile.client.UserStateDetails;
import com.amazonaws.mobile.client.results.SignInResult;
import com.amazonaws.mobile.client.results.SignUpResult;
import com.amazonaws.mobile.client.results.UserCodeDeliveryDetails;

import java.util.HashMap;
import java.util.Map;
public class MainActivity extends AppCompatActivity {
    private static final String TAG = login.class.getSimpleName();

    public String username = "";
    public String password ="";
    public String ename = "";
    private EditText usernameInput;
    private EditText passwordInput;
    private EditText emailInput;
    private EditText givenName;
    private EditText familyName;

    private EditText phone;

    private Button signUp;

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

        usernameInput = (EditText) findViewById(R.id.editTextRegUserId);
        passwordInput = (EditText) findViewById(R.id.editTextRegUserPassword);
        emailInput = (EditText) findViewById(R.id.editTextRegEmail);
        signUp = (Button) findViewById(R.id.signUp);

        signUp.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {

                        final String password = passwordInput.getText().toString();
                        final String username = usernameInput.getText().toString();
                        System.out.println("password: " + password);

                        System.out.println("username: " + username);



                final Map<String, String> attributes = new HashMap<>();
                         attributes.put("username", username);

                        System.out.println("default user: " + AWSMobileClient.getInstance());
                        AWSMobileClient.getInstance().signUp(username, password, attributes, null, new Callback<SignUpResult>() {

                              @Override
                              public void onResult(final SignUpResult signUpResult) {
                                  runOnUiThread(new Runnable() {
                                      @Override
                                      public void run() {
                                          Log.d(TAG, "Sign-up callback state: " + signUpResult.getConfirmationState());
                                          if (!signUpResult.getConfirmationState()) {
                                              final UserCodeDeliveryDetails details = signUpResult.getUserCodeDeliveryDetails();
                                              //makeToast("Confirm sign-up with: " + details.getDestination());
                                              Toast toast = Toast.makeText(getApplicationContext(), "Confirm sign-up with: " + details.getDestination(), Toast.LENGTH_LONG);
                                              toast.show();
                                          } else {
                                              //makeToast("Sign-up done.");
                                              Toast toast1 = Toast.makeText(getApplicationContext(), "Sign-up done. ", Toast.LENGTH_LONG);
                                              toast1.show();
                                          }
                                      }
                                  });
                              }

                              @Override
                              public void onError(Exception e) {
                                  Log.e(TAG, "Sign-up error", e);
                                  System.out.println("error: "+ e.getLocalizedMessage());

                              }
                          });
            }

        });
    }
}

Answer 1

需要先调用初始化。

 awsMobileClient.initialize(this, new Callback<UserStateDetails>() {
        @Override
        public void onResult(UserStateDetails result) {
            Log.d("JOE","Start  sign up");
            startSignUp();
        }

        @Override
        public void onError(Exception e) {
            Log.d("JOE","onError  sign up"+ e.toString());
        }
    });