Android SharedPreferences工具类 ，实现List/Map的保存读取

最近因为需要将List集合和Map集合的数据保存到SharedPreferences中，所以对以前自己封装的SharedPreferencesUtil进行了修改，在原有的保存读Integer，String，Float，Long，Boolean，Object的基础上增加了保存读取List<Object>以及Map<String,Object>的功能。话不多说，下面直接贴代码和简单的Demo，仅供参考：

SharedPreferencesUtil

代码

/**
 * Created by ZhangHao on 2016/6/21.
 * SharedPreferences 工具类
 */

public class SharedPreferencesUtil {
   

    private static SharedPreferencesUtil util;
    private static SharedPreferences sp;

    private SharedPreferencesUtil(Context context, String name) {
        sp = context.getSharedPreferences(name, Context.MODE_PRIVATE);
    }

    /**
     * 初始化SharedPreferencesUtil,只需要初始化一次，建议在Application中初始化
     *
     * @param context 上下文对象
     * @param name    SharedPreferences Name
     */
    public static void getInstance(Context context, String name) {
        if (util == null) {
            util = new SharedPreferencesUtil(context, name);
        }
    }

    /**
     * 保存数据到SharedPreferences
     *
     * @param key   键
     * @param value 需要保存的数据
     * @return 保存结果
     */
    public static boolean putData(String key, Object value) {
        boolean result;
        SharedPreferences.Editor editor = sp.edit();
        String type = value.getClass().getSimpleName();
        try {
            switch (type) {
                case "Boolean":
                    editor.putBoolean(key, (Boolean) value);
                    break;
                case "Long":
                    editor.putLong(key, (Long) value);
                    break;
                case "Float":
                    editor.putFloat(key, (Float) value);
                    break;
                case "String":
                    editor.putString(key, (String) value);
                    break;
                case "Integer":
                    editor.putInt(key, (Integer) value);
                    break;
                default:
                    Gson gson = new Gson();
                    String json = gson.toJson(value);
                    editor.putString(key, json);
                    break;
            }
            result = true;
        } catch (Exception e) {
            result = false;
            e.printStackTrace();
        }
        editor.apply();
        return result;
    }

    /**
     * 获取SharedPreferences中保存的数据
     *
     * @param key          键
     * @param defaultValue 获取失败默认值
     * @return 从SharedPreferences读取的数据
     */
    public static Object getData(String key, Object defaultValue) {
        Object result;
        String type = defaultValue.getClass().getSimpleName();
        try {
            switch (type) {
                case "Boolean":
                    result = sp.getBoolean(key, (Boolean) defaultValue);
                    break;
                case "Long":
                    result = sp.getLong(key, (Long) defaultValue);
                    break;
                case "Float":
                    result = sp.getFloat(key, (Float) defaultValue);
                    break;
                case "String":
                    result = sp.getString(key, (String) defaultValue);
                    break;
                case "Integer":
                    result = sp.getInt(key, (Integer) defaultValue);
                    break;
                default:
                    Gson gson = new Gson();
                    String json = sp.getString(key, "");
                    if (!json.equals("") && json.length() > 0) {
                        result = gson.fromJson(json, defaultValue.getClass());
                    } else {
                        result = defaultValue;
                    }
                    break;
            }
        } catch (Exception e) {
            result = null;
            e.printStackTrace();
        }
        return result;
    }

    /**
     * 用于保存集合
     *
     * @param key  key
     * @param list 集合数据
     * @return 保存结果
     */
    public static <T> boolean putListData(String key, List<T> list) {
        boolean result;
        String type = list.get(0).getClass().getSimpleName();
        SharedPreferences.Editor editor = sp.edit();
        JsonArray array = new JsonArray();
        try {
            switch (type) {
                case "Boolean":
                    for (int i = 0; i < list.size(); i++) {
                        array.add((Boolean) list.get(i));
                    }
                    break;
                case "Long":
                    for (int i = 0; i < list.size(); i++) {
                        array.add((Long) list.get(i));
                    }
                    break;
                case "Float":
                    for (int i = 0; i < list.size(); i++) {
                        array.add((Float) list.get(i));
                    }
                    break;
                case "String":
                    for (int i = 0; i < list.size(); i++) {
                        array.add((String) list.get(i));
                    }
                    break;
                case "Integer":
                    for (int i = 0; i < list.size(); i++) {
                        array.add((Integer) list.get(i));
                    }
                    break;
                default:
                    Gson gson = new Gson();
                    for (int i = 0; i < list.size(); i++) {
                        JsonElement obj = gson.toJsonTree(list.get(i));
                        array.add(obj);
                    }
                    break;
            }
            editor.putString(key, array.toString());
            result =