how to use shared preference concept in loginpage in android

Question

when I give username and password on clicking login button means login will get successfully. when I give username and password on clicking check box and after if I login successfully and I close the application now if I again open the application username and password has to be their in textboxes. now I directly click on login button and it has to be login success fully.

I try this code

public class Login extends Activity {
    CheckBox check;

    private static final String UPDATE_URL = "http://202.62.91.45/NewCozyDine/login1.php3";
    public ProgressDialog progressDialog;
    private EditText UserEditText;
    private EditText PassEditText;

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        progressDialog = new ProgressDialog(this);
        progressDialog.setMessage("Please wait...");
        progressDialog.setIndeterminate(true);
        progressDialog.setCancelable(false);
        UserEditText = (EditText) findViewById(R.id.username);
        PassEditText = (EditText) findViewById(R.id.password);
        check=(CheckBox) findViewById(R.id.checkbox);
        Button button = (Button) findViewById(R.id.okbutton);
        button.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                int usersize = UserEditText.getText().length();
                int passsize = PassEditText.getText().length();
                if(usersize > 0 && passsize > 0) {
                    progressDialog.show();
                    String user = UserEditText.getText().toString();
                    String pass = PassEditText.getText().toString();
                    doLogin(user, pass);
                } else createDialog("Error","Please enter Username and Password");
            }
        });

I wrote for login button for xml parser(Validating from server database). how can wrote for check box for remember

Take a look at http://developer.android.com/reference/android/content/SharedPreferences.html. Use SharedPreferences to store your credentials and checkbox state and retrieve on next invocation. — Rajesh, Apr 19 '12 at 12:43

score 1 · Answer 1 · answered Apr 19 '12 at 12:43

Try like this,

 public SharedPreferences prefs;
 public String prefName = "MyPref";
 private static final String REMEMBER = "remember_me";
 public static final String Password = "volume_range";
 public static final String User_Name = "my_alarmstate";
 prefs = getSharedPreferences(prefName, MODE_PRIVATE);      
 remember_state  = prefs.getBoolean(REMEMBER, false);   
 remember_chebox.setChecked(remember_state);
 if(remember_state == true) {

            uname_et.setText(prefs.getString(User_Name, null));
            password_et.setText(prefs.getString(Password, null));
        }

SharedPreferences.Editor editor = prefs.edit();


                editor.putString(User_Name, entered_name);
                editor.putString(Password, entered_password);   
                editor.putBoolean(REMEMBER, remember_state);
                editor.commit();

score 1 · Answer 2 · answered Apr 19 '12 at 12:48

Just identify that on Checkbox Selected. on its Listner you will have to use SharedPreference, this will saves your data in the Application.

CheckBox savepass;
public static final String PREFS_NAME = "MyPrefsFile";
private static final String PREF_USERNAME = "username";
private static final String PREF_PASSWORD = "password";
private static final String PREF_STATUS = "status";

savepass = (CheckBox) findViewById(R.id.remeber);
savepass.setChecked(false);

//On Sign in Button write this code. This code is used for Saving in SharedPreference

if (savepass.isChecked()) {
                getSharedPreferences(PREFS_NAME, MODE_PRIVATE).edit()
                        .putString(PREF_USERNAME, uid.getText().toString())
                        .putString(PREF_PASSWORD, pwd.getText().toString())
                        .putString(PREF_STATUS, "true").commit();
                /*
                 * Toast.makeText(getApplicationContext(),
                 * "Saved Successfully", Toast.LENGTH_LONG).show();
                 */
            }else {
                getSharedPreferences(PREFS_NAME, MODE_PRIVATE).edit()
                        .putString(PREF_USERNAME, "").putString(
                                PREF_PASSWORD, "").putString(PREF_STATUS,
                                "").commit();
//this else part is if user has already been checked and saved in application, then name of the user will be displayed on username and password edittextbox.
            }

score 1 · Answer 3 · answered Apr 19 '12 at 12:50

if (successful login and remember-me checkbox is marked...) {
    SharedPreferences SP = PreferenceManager.getDefaultSharedPreferences(getBaseContext());
    SharedPreferences.Editor spEditor = SP.edit();
    spEditor.putString("username"),userName);
    spEditor.putString("password",password);
    spEditor.commit();

then on onCreate you just check if it already exist and present it if it does.

SharedPreferences SP = PreferenceManager.getDefaultSharedPreferences(getBaseContext());
    userName = SP.getString("username", "none");
if (!userName.equal("none"))
    editText.setText(userName);
....

score 0 · Answer 4 · edited May 23 '17 at 12:29

0

As you are About to Use SharedPreferences in your Application .I like you to look in this one SO link for SharedPreferences.

Go here for Saving Data in SharedPreferences.I would like you to use encrypting for Password.

For a guide to using AES encryption in Android Refer this

http://developer.motorola.com

edited May 23 '17 at 12:29

Community

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answered Apr 19 '12 at 13:03

Herry

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how to use shared preference concept in loginpage in android

4 Answers4