1.SharedPreferences類將數據保存在一個xml文件中,文件存放在/data/data/<package name>/shared_prefs目錄下
// //創建異或獲取一個已經存在的sharedPreferences對象
SharedPreferences sharedPreferences = getSharedPreferences("mySP", Context.MODE_PRIVATE);
2. 新增或編輯值
Editor editor = sharedPreferences.edit();
editor.putString("username", "ccc");
editor.putString("password", "ddd");
editor.commit();
3. 讀取值,第二個參數爲默認值,如果取不到,則返回這個默認值
String username = sharedPreferences.getString("username", "");
String password = sharedPreferences.getString("password", "");
4. 刪除值
Editor editor = sharedPreferences.edit();
editor.remove("password");
editor.commit();