安卓：问题记得我登录活动的功能 [英] Android:problem in remember me functionality of login Activity

问题描述

我有2的EditText和复选框，并登录按钮来创建登录页面。 如果我设置复选框，启用我想保存数据，以便下一次用户并不需要填写的字段..
我已经使用这个code，但没有运气。

i have create login page with 2 EditText and checkbox and login button. if i set checkbox to Enabled i want to save data so next time user doesn't need to fill that fields..
i have uses this code but no luck..

公共类LoginPage延伸活动{

public class LoginPage extends Activity {

EditText d_ID;
EditText password;
CheckBox cb;
ImageButton ib;

public static final String PREFS_NAME = "MyPrefsFile";
public String PREFS_USER;
public String PREFS__PASS;
String username;
String upass;

共享preferences preF

SharedPreferences pref

@Override
public void onCreate(Bundle savedInstanceState) {

    requestWindowFeature(Window.FEATURE_NO_TITLE);
    super.onCreate(savedInstanceState);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
    setContentView(R.layout.loginpage);

    d_ID = (EditText) findViewById(R.id.dulzuID);
    password = (EditText) findViewById(R.id.dulzuPASS);

    cb = (CheckBox) findViewById(R.id.remember);

    ib = (ImageButton) findViewById(R.id.login);






        pref = getSharedPreferences(PREFS_NAME, MODE_PRIVATE);
        username = pref.getString(PREFS_USER, null);
        upass = pref.getString(PREFS__PASS, null);
        d_ID.setText(username);
        password.setText(upass);




    ib.setOnClickListener(new OnClickListener() {

        public void onClick(View view) {

            startActivity(new Intent(LoginPage.this, Features.class));
        }
    });

    cb.setOnCheckedChangeListener(new OnCheckedChangeListener() {

        public void onCheckedChanged(CompoundButton cb1, boolean bln) {

                PREFS_USER = d_ID.getText().toString();//get user name from EditText
                PREFS__PASS = password.getText().toString();//get user Password from EditText
                getSharedPreferences(PREFS_NAME, MODE_PRIVATE).edit().putString(PREFS_USER, username).putString(PREFS__PASS, upass).commit();

        }
    });

}

}

任何帮助??

谢谢...

推荐答案

我想你混淆了获取用户密码的值的变量，并且确定在preferences的用户名/密码值的变量。我的认为的，你打算这些：

I think you are confusing the variables for retrieving the value of the users password and the variables that identify the username/password values in the preferences. I think that you intend these:

public String PREFS_USER;
public String PREFS__PASS;

是标识符存储的用户名和密码，但是你再设置他们是值的你已经从拉相应的 EditTexts 。我已经改写了一些$ C $下您：

to be the identifiers for your stored username and password, however you then set them to be the values that you have pulled from the corresponding EditTexts. I have rewritten some of the code for you:

public static final String PREFS_NAME = "MyPrefsFile";
public static final String PREFS_USER = "prefsUsername";
public static final String PREFS__PASS = "prefsPassword";
...
pref = getSharedPreferences(PREFS_NAME, MODE_PRIVATE);
username = pref.getString(PREFS_USER, "");
upass = pref.getString(PREFS__PASS, "");
...
public void onCheckedChanged(CompoundButton cb1, boolean bln) {
    username = d_ID.getText().toString();//get user name from EditText
    upass = password.getText().toString();//get user Password from EditText
    getSharedPreferences(PREFS_NAME, MODE_PRIVATE).edit().putString(PREFS_USER, username).putString(PREFS__PASS, upass).commit();
}

就个人而言，我不会做那样的虽然。我会检查复选框的值，当用户提交表单，并且只保存用户名和放大器;密码在这一点上。如果用户取消选中什么，然后重新检查的复选框的之前他们已经进入了自己的密码？您将节省空值和惹恼你的用户。

Personally, I wouldn't do it like that though. I would check the value of the checkbox when the user submits the form, and only save the username & password at that point. What if the user unchecks and then rechecks the tick box before they have entered their password? You will save empty values and annoy your users.

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