读写更方便

    public class PersistenceUtil {            private Context context;                    public Context getContext() {                return context;            }                    public void setContext(Context context) {                this.context = context;            }                    public PersistenceUtil(Context context) {                this.context = context;            }                    public void savePersistence(String name, String key, Integer value) {                SharedPreferences sharedPreferences = context.getSharedPreferences(                        name, Context.MODE_PRIVATE);                Editor editor = sharedPreferences.edit();                editor.putInt(key, value);                editor.commit();            }                    public void savePersistence(String name, String key, String value) {                SharedPreferences sharedPreferences = context.getSharedPreferences(                        name, Context.MODE_PRIVATE);                Editor editor = sharedPreferences.edit();                editor.putString(key, value);                editor.commit();            }                    public void savePersistence(String name, String key, Boolean value) {                SharedPreferences sharedPreferences = context.getSharedPreferences(                        name, Context.MODE_PRIVATE);                Editor editor = sharedPreferences.edit();                editor.putBoolean(key, value);                editor.commit();            }                    public String getPersistenceString(String name, String key) {                SharedPreferences sharedPreferences = context.getSharedPreferences(                        name, Context.MODE_PRIVATE);                String value = sharedPreferences.getString(key, "null");                return value;            }                    public Boolean getPersistenceBoolean(String name, String key) {                SharedPreferences sharedPreferences = context.getSharedPreferences(                        name, Context.MODE_PRIVATE);                Boolean value = sharedPreferences.getBoolean(key, false);                return value;            }                    public Integer getPersistenceInteger(String name, String key) {                SharedPreferences sharedPreferences = context.getSharedPreferences(                        name, Context.MODE_PRIVATE);                Integer value = sharedPreferences.getInt(key, -1);                return value;            }        }