创建和保存Preference

   

为了创建和修改一个Shared Preference,在程序上下文中调用getSharedPreferences方法,传入你要变更的Shared Preference的名字。Shared Preference可以在程序的组件间共享,但对其它应用程序来说不可获得的。

 

修改一个Shared Preference,使用SharedPreferences.Editor类。通过对你想要改变的SharedPreference对象调用edit方法获得Editor对象。保存修改的结果时,调用Editorcommit方法。如下面的代码片段所示:

 

public static final String MYPREFS = “mySharedPreferences”;

protected void savePreferences()

{

// Create or retrieve the shared preference object.

int mode = Activity.MODE_PRIVATE;

SharedPreferences mySharedPreferences = getSharedPreferences(MYPREFS, mode);

 

// Retrieve an editor to modify the shared preferences.

SharedPreferences.Editor editor = mySharedPreferences.edit();

 

// Store new primitive types in the shared preferences object.

editor.putBoolean(“isTrue”, true);

editor.putFloat(“lastFloat”, 1f);

editor.putInt(“wholeNumber”, 2);

editor.putLong(“aNumber”, 3l);

editor.putString(“textEntryValue”, “Not Empty”);

 

// Commit the changes.

editor.commit();

}

posted on 2009-08-05 10:44  xirihanlin  阅读(999)  评论(0编辑  收藏  举报