android 本地存取复杂数据

@SuppressWarnings("unchecked")

public List<Map<String, Object>> fetch(String name)

{

List<Map<String, Object>> data = null;

SharedPreferences preferences = getSharedPreferences("base64",Context.MODE_PRIVATE);

String dataBase64 = preferences.getString(name, "");

if (dataBase64 != "") {

byte[] base64 = Base64.decode(dataBase64.getBytes(),Base64.DEFAULT);

ByteArrayInputStream bais = new ByteArrayInputStream(base64);

try {

ObjectInputStream bis = new ObjectInputStream(bais);

try {

data = (List<Map<String, Object>>) bis.readObject();

} catch (ClassNotFoundException e) {

}

} catch (StreamCorruptedException e) {

} catch (IOException e) {

}

return data;

}

public void save(List<Map<String, Object>> data,String name)

{

SharedPreferences preferences = getSharedPreferences("base64",Context.MODE_PRIVATE);

ByteArrayOutputStream baos = new ByteArrayOutputStream();

try {

ObjectOutputStream oos = new ObjectOutputStream(baos);

oos.writeObject(data);

String dataBase64 = new String(Base64.encodeToString(baos.toByteArray(),Base64.DEFAULT));

Editor editor = preferences.edit();

editor.putString(name, dataBase64);

editor.commit();

} catch (IOException e) {

}

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