java - SharedPreferences 读取相同的值

Question

我有一个应用程序，我试图在用户登录时保存用户名和密码。当用户启动该应用程序时，它应该读取用户名和密码并登录。问题是，它总是读取密码两次——一次读取密码(正确)，一次读取用户名。因此它尝试使用密码作为用户名和密码登录。

阅读:

sharedPref = PreferenceManager.getDefaultSharedPreferences(MainActivity.this);

String userName = sharedPref.getString(getString(
    R.string.de_letorat_TicTacToe_PREF_NAME), null);
if(userName != null) { 
    String password = sharedPref.getString(getString(
        R.string.de_letorat_TicTacToe_PREF_PASSWORD), null);
    Log.d("TicTacToe", "Read. Username: " + userName + "; Password: " + password);
    pw.println("$login" + userName + "/" + password);  
    pw.flush();
    Log.d("TicTacToe", "Sent. Username: " + userName + "; Password: " + password);
}

保存:

Editor edit = sharedPref.edit();

EditText nameField = (EditText) findViewById(R.id.login_fragment_username);
EditText passwordField = (EditText) findViewById(R.id.login_fragment_password);

edit.putString(getString(R.string.de_letorat_TicTacToe_PREF_NAME),
    nameField.getText().toString());
edit.putString(getString(R.string.de_letorat_TicTacToe_PREF_PASSWORD),
    passwordField.getText().toString());
edit.commit();

Log.d("TicTacToe", "Wrote. Username: " + nameField.getText().toString() +
    "; Password: " + passwordField.getText().toString());

结果是:

Wrote. Username: [username]; Password: [password]
Read. Username: [password]; Password: [password]
Sent. Username: [password]; Password: [password]

Answer 1

检查您的 preferences.xml 或 strings.xml 是否有重复键。

您的偏好键似乎都是“密码”。