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/** * 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 = true; } catch (Exception e) { result = false; e.printStackTrace(); } editor.apply(); return result; }
/** * 获取保存的List * * @param key key * @return 对应的Lis集合 */ public static <T> List<T> getListData(String key, Class<T> cls) { List<T> list = new ArrayList<>(); String json = sp.getString(key, ""); if (!json.equals("") && json.length() > 0) { Gson gson = new Gson(); JsonArray array = new JsonParser().parse(json).getAsJsonArray(); for (JsonElement elem : array) { list.add(gson.fromJson(elem, cls)); } } return list; }
/** * 用于保存集合 * * @param key key * @param map map数据 * @return 保存结果 */ public static <K, V> boolean putHashMapData(String key, Map<K, V> map) { boolean result; SharedPreferences.Editor editor = sp.edit(); try { Gson gson = new Gson(); String json = gson.toJson(map); editor.putString(key, json); result = true; } catch (Exception e) { result = false; e.printStackTrace(); } editor.apply(); return result; }
/** * 用于保存集合 * * @param key key * @return HashMap */ public static <V> HashMap<String, V> getHashMapData(String key, Class<V> clsV) { String json = sp.getString(key, ""); HashMap<String, V> map = new HashMap<>(); Gson gson = new Gson(); JsonObject obj = new JsonParser().parse(json).getAsJsonObject(); Set<Map.Entry<String, JsonElement>> entrySet = obj.entrySet(); for (Map.Entry<String, JsonElement> entry : entrySet) { String entryKey = entry.getKey(); JsonObject value = (JsonObject) entry.getValue(); map.put(entryKey, gson.fromJson(value, clsV)); } Log.e("SharedPreferencesUtil", obj.toString()); return map; } } --------------------- 作者：Black_Hao 来源： 原文：https://blog.csdn.net/a512337862/article/details/73633420 版权声明：本文为博主原创文章，转载请附上博文链接！
