android學習十三 喜好設定

標籤：

1，喜好設定可用用來持久儲存使用者佈建，遊戲最高分等

2，喜好設定有，列表喜好設定，複選框喜好設定，對話方塊喜好設定..3，通過xml檔案和代碼建立喜好設定     addPreferencesFromResource(R.xml.main)4.從喜好設定中擷取值   Resources resources = this.getResources();              SharedPreferences spf= PreferenceManager.getDefaultSharedPreferences( this);              String option = spf.getString(resources.getString(R.string.FLIGHT_SORT_KEY),                            resources.getString(R.string.FLIGHT_SORT_DEFAULT_VALUE ));                            String[] optionArray = resources.getStringArray(R.array.filght_sort_option );5.判斷是否存在某個喜好設定的值 boolean hasPreferences = myPrefs.getBoolean(INITIALIZED, false);
if(hasPreferences) {
Log.v("Preferences", "We‘ve been called before");
// Read other values as desired from preferences file...
someString = myPrefs.getString("someString", "");
}
else {
Log.v("Preferences", "First time ever being called");
// Set up initial values for what will end up
// in the preferences file
someString = "some default value";
}
// Later when ready to write out values 6.在代碼中設定喜好設定的值Editor editor = myPrefs.edit();
CHAPTER 13: Working with Preferences and Saving State  359
editor.putBoolean(INITIALIZED, true);
editor.putString("someString", someString);
// Write other values as desired
editor.commit();  7.喜好設定可用嵌套，可以存在父子關係。    8一般步驟   a.在xml檔案中布局喜好設定  b.建立活動繼承自PreferenceActivity,然後通過   addPreferencesFromResource() 建立視圖  c.通過相應的方法擷取和設定值   

android學習十三 喜好設定