Question

这是一个简单的项目，我正在使用Volley从https://jsonplaceholder.typicode.com/todos/1获取json数据（作为字符串）

我将Activity，Logic（使用Presenter）和Service（将与其余服务进行对话，使用POST，GET方法等）分开。
现在，在活动中，有一个登录按钮及其单击侦听器（其实现在WelcomePresenter中）
当用户输入电子邮件和密码时（不要将自己与电子邮件混淆，这只是将来的功能），我在服务类中合并了字符串“ https://jsonplaceholder.typicode.com/todos/”和用户密码，并执行GET方法
如果响应http状态码为200，则我正在打开新的活动，该活动将打印公正的响应，否则保持相同的活动并使吐司消息“填充区域”
在这里发生了什么事
- 单击“登录”按钮（我输入的密码为100，因此我正在执行GET方法https://jsonplaceholder.typicode.com/todos/100）
- 但是，在第一次单击时会显示Toast消息，单击多次后，新活动将打开）

这是WelcomeView

public class WelcomeActivity extends AppCompatActivity implements WelcomeView {
    private WelcomePresenter welcomeBasePresenter;
    private EditText usermail, userpassword;
    private Button loginButton;
    private RequestQueue requestQueue;
    private Service restService;
    protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_welcome);

         this.usermail = findViewById(R.id.welcome_activity_edittext_username);
         this.userpassword = findViewById(R.id.welcome_activity_edittext_userpassword);
         this.loginButton = findViewById(R.id.welcome_activity_button_login);
         this.requestQueue = VolleySingleton.getInstance(this).getRequestQueue();
         this.restService = new ServiceImpl(this.requestQueue);

         this.welcomeBasePresenter = new WelcomePresenterImpl(this, this.restService);

         this.loginButton.setOnClickListener((v) -> {
         String usermail = this.usermail.getText().toString();
         String password = this.userpassword.getText().toString();
         this.welcomeBasePresenter.loginButtonListener(usermail, password);
         });
    }
    public void loadErrorMessage(String... errorMessage) {
      //make toast message
    }
    public void loadUserPageActivity() {
       // load new activity
    }
}

这是WelcomePresenter

public class WelcomePresenterImpl implements WelcomePresenter {
    private WelcomeView welcomeView;
    private Service service;

    public WelcomePresenterImpl(WelcomeView responsibleView, Service restServis){
        this.welcomeView = responsibleView;

        this.service = restServis;
    }

    public void loginButtonListener(String usermail, String userpassword) {
        service.validateUser(usermail, userpassword);
        if (service.getUserRegisterHttpCode() == 200){
        this.welcomeView.loadUserPageActivity(service.getJsonData());
        }else{
            this.welcomeView.loadErrorMessage();
        }
    }
}

这是与后端对话的Service类

public class ServiceImpl implements Service{
    private String jsonData;
    private RequestQueue requestQueue;
    private int userRegisterHttpCode;

    public ServiceImpl(RequestQueue requestQueue){
        this.requestQueue = requestQueue;
    }

    public void validateUser(String usermail, String userpassword){
        String url = EndPoint.URL.getUrl() + userpassword;
        StringRequest stringRequest = new StringRequest(
               Request.Method.GET, 
               url, 
               response -> userToken = response, 
               error -> setUserRegisterHttpCode(error.networkResponse.statusCode)){
        @Override
        protected Response<String> parseNetworkResponse(NetworkResponse response) {
            setUserRegisterHttpCode(response.statusCode);

            return super.parseNetworkResponse(response);

        };
        this.requestQueue.add(stringRequest);
    }
}

第一次单击时未显示Android Studio，Volley，api响应

0 个答案: