默认的SharedPreferences不保存值

Question

I have this class:

public class SharedPreferenceUtil {

private SharedPreferences prefs;

private static final String PRODUCTION_MODE_URL_GET_CHECKLIST_JSON = "www.exemplo.com/json";

//configuration keys
private static final String KEY_URL_GET_CHECKLIST_JSON = "KEY_URL_GET_CHECKLIST_JSON";

public SharedPreferenceUtil(Context context){
    prefs = PreferenceManager.getDefaultSharedPreferences(context);
}

private void initializeDefaultAppConfigurationValues(){
    prefs.edit().putString(KEY_URL_GET_CHECKLIST_JSON, PRODUCTION_MODE_URL_GET_CHECKLIST_JSON);
    prefs.edit().commit();
}

public Configuration getConfiguration() {
    Configuration configuration = new Configuration();

    initializeDefaultAppConfigurationValues();

    configuration.setChecklistGetURL(prefs.getString(KEY_URL_GET_CHECKLIST_JSON,""));

    return configuration;
}

}

When I save the values ​​in row: prefs.edit () commit ().. It returned true. When I try to read the value in: prefs.getString (KEY_URL_GET_CHECKLIST_JSON, ""). It returned "" as if the value had not been saved.

Could someone help me with this problem.

Answer 1

It seems that your code is somewhat unclear

Please refer following code:

Set:

  SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(this);
  SharedPreferences.Editor editor = settings.edit(); 
                            editor.putString("language", language);
                            editor.commit();

Read:

SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(this);
String language = settings.getString("language", "");

Answer 2

please see the below link it will useful for you

Sharedpreference store andr retrival

Answer 3

private SharedPreferences prefs;

you forgot about static

 private static SharedPreferences prefs;   

it should be ONE for all exemplars