android缓存SharedPreferences封装

public class SP {//存储的sharedpreferences文件名private static final String FILE_NAME = \"1212121\";/*** 保存数据到文件*/public static void saveData( String key, Object data){String type = data.getClass().getSimpleName();SharedPreferences sharedPreferences =   MyApplication.getInstance().getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);SharedPreferences.Editor editor = sharedPreferences.edit();if (\"Integer\".equals(type)){editor.putInt(key, (Integer)data);}else if (\"Boolean\".equals(type)){editor.putBoolean(key, (Boolean)data);}else if (\"String\".equals(type)){editor.putString(key, (String)data);}else if (\"Float\".equals(type)){editor.putFloat(key, (Float)data);}else if (\"Long\".equals(type)){editor.putLong(key, (Long)data);}editor.commit();}/*** 从文件中读取数据*/public static Object getData( String key, Object defValue){String type = defValue.getClass().getSimpleName();SharedPreferences sharedPreferences =   MyApplication.getInstance().getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);//defValue为为默认值，如果当前获取不到数据就返回它if (\"Integer\".equals(type)){return sharedPreferences.getInt(key, (Integer)defValue);}else if (\"Boolean\".equals(type)){return sharedPreferences.getBoolean(key, (Boolean)defValue);}else if (\"String\".equals(type)){return sharedPreferences.getString(key, (String)defValue);}else if (\"Float\".equals(type)){return sharedPreferences.getFloat(key, (Float)defValue);}else if (\"Long\".equals(type)){return sharedPreferences.getLong(key, (Long)defValue);}return null;}/*** 是否包含某个*/public  static boolean isContainKey(Context context, String key){SharedPreferences sharedPreferences = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);return sharedPreferences.contains(key);}}