android签到设置每天只能签到一次

废话不多说，直接上代码

//初始化时间控件Time time = new Time();time.setToNow();currentDay = time.monthDay 

签到完之后记录时间 

SharedPreferences存储

Shared.writeString(getActivity(), "Today", currentDay);

设置签到按钮不显示

imgSign.setVisibility(View.GONE);

在onCreate中取保存的值进行判断，不一致的话直接设置签到按钮显示，

if (TextUtils.isEmpty(Today) || !Today.equals(currentDay)) {    imgSign.setVisibility(View.VISIBLE);