how can I write the new value in shared preference

Question

I shared the preference value A after I run a calculation with B you can write directly the result of AB in the shared preference by replacing A with the new value

public class Stats extends Activity {
private final static String MY_PREFERENCES = "MyPref";
private final static String GIORNISPETT = "giornispett";    
public void indietro (View view){
}
@Override
public void onCreate(Bundle savedInstanceState) {
    SharedPreferences prefs = getSharedPreferences(MY_PREFERENCES, Context.MODE_PRIVATE);
    int giornispett = Integer.parseInt(prefs.getString(GIORNISPETT, "24"));

    super.onCreate(savedInstanceState);
    setContentView(R.layout.stats);

    Intent intent=getIntent();
    String trn=getPackageName();
    int Giorni=intent.getIntExtra(trn+".Intgiorni", 0);
    int Giorniresidui=giornispett-Giorni;


    TextView tvgiorni=(TextView)findViewById(R.id.txtgiorni);        
    tvgiorni.append(+Giorni+"");


    TextView tvGiorni_rest=(TextView)findViewById(R.id.txtGiorni_rest);        
    tvGiorni_rest.setText(""+Giorniresidue);



}

}

There are multiple questions asking this already and a simple Google would have returned many basic examples and tutorials. Please do some research before posting new questions. — indivisible, Apr 28 '14 at 14:22

score 1 · Answer 1 · answered Apr 28 '14 at 14:18

1

SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
Editor editor = prefs.edit();
editor.put("key", value);
editor.commit();

answered Apr 28 '14 at 14:18

Boban S.

1,662
13
16

score 0 · Answer 2 · answered Apr 28 '14 at 14:22

0

Adding values to shared preferences works in key - value mode. If you use the same key twice the first value will be overwritten.

answered Apr 28 '14 at 14:22

Dawid C

413
3
10

Ok, solved, thanks to all. – user3564888 Apr 28 '14 at 16:43

score 0 · Accepted Answer · answered Apr 28 '14 at 14:27

0

The most easiest way it is to use SharedPreferences.Editor API with set of put API:

//update application settings based on check box state
SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(activityContext);
Editor editor = sharedPrefs.edit();
editor.putBoolean("optionName", !checkBox.isChecked());
editor.commit();

answered Apr 28 '14 at 14:27

N0dGrand87

727
1
9
16

I tried but I can not figure out how to put – user3564888 Apr 28 '14 at 14:44
To put some value into application sharedPreferences you have to use Editor, and to activate editor just use edit() API. And than store your changes (for ex. refer to http://developer.android.com/reference/android/content/SharedPreferences.Editor.html#putBoolean(java.lang.String, boolean) ) with Editor.commit() API. – N0dGrand87 Apr 28 '14 at 15:10

how can I write the new value in shared preference

3 Answers3