/** * 保存产品项目名称 */ public void setProctNameList(List<String> projectNames){ String listStr; try { listStr = SceneList2String(projectNames); editor.putString("productNameList", listStr); editor.commit(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } public List<String> getProjectNameList(){ List<String> productNames = new ArrayList<String>(); String productName = mSharedPreferences.getString("productNameList", ""); try { productNames = String2SceneList(productName); } catch (StreamCorruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (ClassNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } return productNames; }
主要实现方法：
//将List转化为String public static String SceneList2String(List SceneList) throws IOException { // 实例化一个ByteArrayOutputStream对象，用来装载压缩后的字节文件。 ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(); // 然后将得到的字符数据装载到ObjectOutputStream ObjectOutputStream objectOutputStream = new ObjectOutputStream( byteArrayOutputStream); // writeObject 方法负责写入特定类的对象的状态，以便相应的 readObject 方法可以还原它 objectOutputStream.writeObject(SceneList); // 最后，用Base64.encode将字节文件转换成Base64编码保存在String中 String SceneListString = new String(Base64.encode( byteArrayOutputStream.toByteArray(), Base64.DEFAULT)); // 关闭objectOutputStream objectOutputStream.close(); return SceneListString; } //将String转化成List @SuppressWarnings("unchecked") public static List String2SceneList(String SceneListString) throws StreamCorruptedException, IOException, ClassNotFoundException { byte[] mobileBytes = Base64.decode(SceneListString.getBytes(), Base64.DEFAULT); ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream( mobileBytes); ObjectInputStream objectInputStream = new ObjectInputStream( byteArrayInputStream); List SceneList = (List) objectInputStream .readObject(); objectInputStream.close(); return SceneList; }
