i have used SharedPreferences to save the login data likes remember me,
and i had set three button it has save, clear, read function inside,
but after i save one login data, i cant update the save information anymore,
By the way i already set one checkbox to save data
but it looks doesnt work as well ..
Could some one help me to solve this problem ?
here is my code :
package com.example.escanui;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.MultiAutoCompleteTextView;
public class UserInfoActivity extends ActionBarActivity {
public MultiAutoCompleteTextView userName;
public MultiAutoCompleteTextView ipAddress;
public Button loginConfirmBtw;
public EditText passWord;
public CheckBox memUserInfoCb;
public Button save, read, clear;
private SharedPreferences settings;
private static final String data = "DATA";
public static final String nameField ="NAME";
public static final String passwordField = "PASSWORD";
public static final String ipField = "IP";
public static final String filePathFile ="FILEPATH";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_user_info);
ipAddress = (MultiAutoCompleteTextView) findViewById(R.id.multiAutoCompleteTextView1);
userName = (MultiAutoCompleteTextView) findViewById(R.id.multiAutoCompleteTextView2);
passWord = (EditText) findViewById(R.id.editPassword1);
loginConfirmBtw = (Button) findViewById(R.id.loginButton);
memUserInfoCb = (CheckBox) findViewById(R.id.checkBox1);
save = (Button) findViewById(R.id.saveBtw);
read = (Button) findViewById(R.id.readBtw);
clear = (Button) findViewById(R.id.clearBtw);
setEventListener();
if (memUserInfoCb.isChecked())
{
saveUserInfo();
readData();
}else{
ipAddress.setText("");
userName.setText("");
passWord.setText("");
}
}
public void readData()
{
settings = getSharedPreferences(data,0);
userName.setText(settings.getString(nameField, ""));
ipAddress.setText(settings.getString(ipField, ""));
passWord.setText(settings.getString(passwordField, ""));
}
public void saveUserInfo()
{
settings = getSharedPreferences(data, 0);
settings.edit().putString(ipField, ipAddress.getText().toString());
settings.edit().putString(nameField, userName.getText().toString());
settings.edit().putString(passwordField, passWord.getText().toString());
settings.edit().commit();
}
public void setEventListener(){
save.setOnClickListener(new OnClickListener(){
public void onClick(View arg0) {
saveUserInfo();
}
});
read.setOnClickListener(new OnClickListener(){
public void onClick(View arg0) {
readData();
}
});
clear.setOnClickListener(new OnClickListener(){
public void onClick(View arg0) {
ipAddress.setText("");
userName.setText("");
passWord.setText("");
}
});
}
}
Your problem is when you are saving your data
Everytime you are calling settings.edit()
, you are creating a new Editor
object.
When you call editor.commit()
or editor.apply()
you write all of the changes you've made to the editor object.
So, in your code, you are creating 4 Editor
objects each time you call settings.edit()
settings.edit().putString(ipField, ipAddress.getText().toString());
settings.edit().putString(nameField, userName.getText().toString());
settings.edit().putString(passwordField, passWord.getText().toString());
settings.edit().commit();
Only the last settings.edit()
is being committed, but you've made no changes to that Editor
object, and thus, you commit nothing.
Consider this
public void saveUserInfo()
{
settings = getSharedPreferences(data, Context.MODE_PRIVATE);
SharedPreferences.Editor editor = settings.edit();
editor.putString(ipField, ipAddress.getText().toString());
editor.putString(nameField, userName.getText().toString());
editor.putString(passwordField, passWord.getText().toString());
editor.commit();
}