您好,我希望我的应用程序在用户登录后记住用户的登录详细信息,直到用户按下“注销”按钮。我正在使用这种风格
private CheckBox mCheckSavePassword;
mCheckSavePassword.setChecked(preferences.getBoolean("prefSavePassword", false));
SharedPreferences.Editor preferencesEditor = preferences.edit();
preferencesEditor.putString("prefUserName", username);
if(mCheckSavePassword.isChecked()) {
preferencesEditor.putString("prefPassword", password);
}
preferencesEditor.putBoolean("prefSavePassword", mCheckSavePassword.isChecked());
preferencesEditor.commit();
但是没用
最佳答案
这是您在用户登录成功时保存用户详细信息的方式。
此外,如果您想在下次用户进入登录屏幕时从共享首选项中输入用户名,此代码将帮助您。
如果方向发生变化,我还包含了在 EditText 中填充共享首选项值的代码。
//Form Variables
EditText userName;
CheckBox chkRememberMe;
//SharedPrefernces Variables to save userName and password of User
SharedPreferences loginPreferences;
private static final String SPF_NAME = "vidslogin";
private static final String USERNAME = "username";
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
//Getting Values from edit text fields
userName = (EditText) findViewById(R.id.login_et_username);
//Check box to remember UN and PSW
chkRememberMe = (CheckBox) findViewById(R.id.cb_rememberMe);
//Read previously saved userName from sharedPreferences and populate in the editText
loginPreferences = getSharedPreferences(SPF_NAME, Context.MODE_PRIVATE);
userName.setText(loginPreferences.getString(USERNAME, ""));
}
//Saving Activity State
@Override
public void onSaveInstanceState(Bundle savedInstanceState) {
super.onSaveInstanceState(savedInstanceState);
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Checks the orientation of the screen
if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
//Read previously saved userName & password from sharedPreferences
loginPreferences = getSharedPreferences(SPF_NAME, Context.MODE_PRIVATE);
userName.setText(loginPreferences.getString(USERNAME, ""));
} else if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT){
//Read previously saved userName & password from sharedPreferences
loginPreferences = getSharedPreferences(SPF_NAME, Context.MODE_PRIVATE);
userName.setText(loginPreferences.getString(USERNAME, ""));
}
}
// login function
public void login(){
//Check if he is authenticated
// if Authenticated and if the user checks "REMEMBER ME"-- Checkbox, save his details
//Saving userName into SharedPreferences to read for next time
String strUserName = userName.getText().toString().trim();
if (chkRememberMe.isChecked()){
loginPreferences = getSharedPreferences(SPF_NAME, Context.MODE_PRIVATE);
loginPreferences.edit().putString(USERNAME, strUserName).commit();
}
}
希望对你有帮助。
关于android - 使用 SharedPreferences 保存用户详细信息,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/26731813/