移动应用程序共享首选项保存和呼叫用户登录 [英] Mobile Application Shared Preferences Saving and Calling User Login

问题描述

当前，我的应用程序正在设备"表中搜索现有设备以启用登录访问.但是，我想在每次需要登录时注册一个新设备，并让它们在每次应用程序运行时绕过登录页面.目前，该应用程序说，由于用户名和密码未正确保存，因此打开后的凭据无效.我该如何解决?

Currently my application is searching for an existing device in "Device" table to enable login access. However, I want to register a new device every time they're required to log in and have them bypass the login page every time the application runs. Currently, the application says there's invalid credentials upon opening since the username and password aren't being saved properly. How do I solve this?

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

    // declaring variables
    etUsername = (EditText)findViewById(R.id.etUsername);
    etPassword= (EditText)findViewById(R.id.etPassword);
    btnLogin = (Button)findViewById(R.id.btnLogin);
    etIpAddress = (EditText) findViewById(R.id.etIpAddress);
    String username = etUsername.getText().toString();
    String password = etPassword.getText().toString();
    String ipAddress = etIpAddress.getText().toString();

    SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(LoginActivity.this);
    if (sharedPreferences.contains("ip")) {
        performLogin(username, password, sharedPreferences.getString("ip", ipAddress));
    }

    // setting up things for login button
    btnLogin.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            String ipAddress = etIpAddress.getText().toString();

            SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(LoginActivity.this);

            sharedPreferences.edit()
                    .putString("ip", ipAddress)
                    .apply();

            String username = etUsername.getText().toString().trim();
            String password = etPassword.getText().toString().trim();

            performLogin(username, password, ipAddress);
        }
    });
}

private void performLogin(String username, String password, String ipAddress) {
    try {
        Device.login(username, password, ipAddress, this);
    } catch (JSONException e) {
        onLoginFailure(e);
    }
}

推荐答案

为保存登录凭据，我们始终遵循以下代码: 公共静态最终字符串MyPREFERENCES ="MyPrefs";

For saving login credentials we always follow these code:- public static final String MyPREFERENCES = "MyPrefs" ;

   public static final String Name = "nameKey";
   public static final String Phone = "phoneKey";
   public static final String Email = "ip";
   SharedPreferences.Editor editor = sharedpreferences.edit();

            editor.putString(Name, n);
            editor.putString(Phone, ph);
            editor.putString(ip, e);
            editor.commit();

我认为您必须在代码中使用该东西，而不是apply()方法

I think you must use that thing in your code rather then apply() meth

这篇关于移动应用程序共享首选项保存和呼叫用户登录的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！