将不会从preferences更新 [英] won't update from Preferences

问题描述

它更新的时候我编辑或只需单击preferences屏幕任意输入和比我首先要躲前面的活动确定前的活动。它给了我零按钮和preferences XML我给右键，还设置defaultValue。

所以..场景：我去preferences屏幕上，单击编辑按钮上的文字，只要点击确定，回去后，其0按钮，隐藏前的活动，回到前面的活动，是孤单的正确的价值。

我希望我列入所有必需的部件。

 私人共享preferences preFS;
    私人字符串移动电话号码;
    私有静态最终诠释MENU_ preFERENCES = Menu.FIRST;
    私有静态最终诠释SHOW_ preFERENCES = 1;    私人无效updateFrom preferences（）{
       移动电话号码= prefs.getString（移动电话号码，0）;
    }    私人无效refreshAplication（）{
       button.setText（移动电话号码）;
    }    @覆盖
       公共无效的onCreate（捆绑savedInstanceState）{
       super.onCreate（savedInstanceState）;
       的setContentView（R.layout.main）;
       preFS = preferenceManager.getDefaultShared preferences（本）;
       updateFrom preferences（）;
       refreshAplication（）;
    }    @覆盖
    公共布尔onOptionsItemSelected（菜单项项）{
      开关（item.getItemId（））{
        案例（MENU_ preFERENCES）：{
            意图I =新意图（这一点，preferences.class）;
            startActivityForResult（I，SHOW_ preFERENCES）;
            返回true;
        }
       }
       返回false;
    }    @覆盖
    公共无效的onActivityResult（INT申请code，INT结果code，意图数据）{
      super.onActivityResult（要求code，结果code，数据）;      如果（要求code == SHOW_ preFERENCES）
      如果（结果code == Activity.RESULT_OK）{
        updateFrom preferences（）;
        refreshAplication（）;
      }
    }    公共类preferences扩展$ P $ {pferenceActivity
    @覆盖
    公共无效的onCreate（捆绑savedInstanceState）{
      super.onCreate（savedInstanceState）;
      加preferencesFromResource（R.xml.user preferences）;
      }
    }
 

解决方案

呼叫 refreshAplication（）; 在 onResume（）。

It updates front activity when I edit or just click ok on any input in preferences screen and than i must first hide front activity. It gives me zero on button and in preferences xml i gave right key and also defaultValue.

So .. scenario: i go to preferences screen, click to edit button text, just click ok, go back, its "0" on button, hide front activity, go back to front activity and theres is the right value.

I hope i included all necessary parts.

    private SharedPreferences prefs;
    private String mobileNumber;
    private static final int MENU_PREFERENCES = Menu.FIRST;
    private static final int SHOW_PREFERENCES = 1;

    private void updateFromPreferences() {
       mobileNumber = prefs.getString("mobileNumber", "0");
    }

    private void refreshAplication(){
       button.setText(mobileNumber);
    }

    @Override
       public void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.main);
       prefs = PreferenceManager.getDefaultSharedPreferences(this);
       updateFromPreferences();
       refreshAplication();
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
      switch (item.getItemId()) {
        case (MENU_PREFERENCES): {
            Intent i = new Intent(this, Preferences.class);
            startActivityForResult(i, SHOW_PREFERENCES);
            return true;
        }
       }
       return false;
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
      super.onActivityResult(requestCode, resultCode, data);

      if (requestCode == SHOW_PREFERENCES)
      if (resultCode == Activity.RESULT_OK) {
        updateFromPreferences();
        refreshAplication();
      } 
    }

    public class Preferences extends PreferenceActivity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      addPreferencesFromResource(R.xml.userpreferences);
      }   
    }

解决方案

Call refreshAplication(); in onResume().

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