1

我正在创建一个在 actionbarsherlock 中有一个菜单项的程序。现在我希望用户每天单击该菜单一次,不再单击。我怎样才能做到这一点?这是我到目前为止所拥有的:

int hour = today.get(Calendar.HOUR_OF_DAY);

if (hour < 24) {

    try {
        if (gotGenders.contentEquals("Male")) {
            AlertDialog.Builder alertDialog = new AlertDialog.Builder(
                    Monitor.this);
            alertDialog.setTitle(gotNames);
            alertDialog.setMessage("You are currently burning "
                    + caloriesForMen() + " calories per hour");
            alertDialog.setPositiveButton("Save",
                    new DialogInterface.OnClickListener() {

                        @Override
                        public void onClick(DialogInterface dialog,
                                int which) {
                            // TODO Auto-generated method stub

                        }
                    });

            alertDialog.setNegativeButton("Discard",
                    new DialogInterface.OnClickListener() {

                        @Override
                        public void onClick(DialogInterface dialog,
                                int which) {
                            // TODO Auto-generated method stub
                            dialog.dismiss();
                        }
                    });

            alertDialog.setCancelable(false);
            showAlertDialog = alertDialog.create();
            showAlertDialog.show();
        }
        else if (gotGenders.contentEquals("Female")) {
            AlertDialog.Builder alertDialog = new AlertDialog.Builder(
                    Monitor.this);
            alertDialog.setTitle(gotNames);
            alertDialog.setMessage("You are currently burning "
                    + caloriesForWomen() + " calories per hour");
            alertDialog.setPositiveButton("Save",
                    new DialogInterface.OnClickListener() {

                        @Override
                        public void onClick(DialogInterface dialog,
                                int which) {
                            // TODO Auto-generated method stub
                            // dialog.dismiss();
                        }
                    });

            alertDialog.setNegativeButton("Discard",
                    new DialogInterface.OnClickListener() {

                        @Override
                        public void onClick(DialogInterface dialog,
                                int which) {
                            // TODO Auto-generated method stub
                            dialog.dismiss();
                        }
                    });

            alertDialog.setCancelable(false);
            showAlertDialog = alertDialog.create();
            showAlertDialog.show();

            count = 1;
        }
    } catch (Exception ex) {
        ex.printStackTrace();

        AlertDialog.Builder errorDialog = new AlertDialog.Builder(
                Monitor.this);
        errorDialog.setTitle("No User Selected!");
        // errorDialog.setMessage("You are currently burning " +
        // caloriesForWomen() + " per hour");
        errorDialog.setPositiveButton("OK",
                new DialogInterface.OnClickListener() {

                    @Override
                    public void onClick(DialogInterface dialog,
                            int which) {
                        // TODO Auto-generated method stub
                        dialog.dismiss();
                    }
                });

        errorDialog.setCancelable(false);
        errorAlertDialog = errorDialog.create();
        errorAlertDialog.show();
    }
} else {
    count = 0;

    AlertDialog.Builder waitDialog = new AlertDialog.Builder(
            Monitor.this);
    waitDialog.setTitle("Wait after the day is over");
    waitDialog.setPositiveButton("OK",
            new DialogInterface.OnClickListener() {

                @Override
                public void onClick(DialogInterface dialog, int which) {
                    // TODO Auto-generated method stub
                    dialog.dismiss();
                }
            });

    waitDialog.setCancelable(false);
    waitAlertDialog = waitDialog.create();
    waitAlertDialog.show();
}

这使我可以多次选择菜单,如何将其限制为每天仅单击一次?感谢您提供任何帮助。

4

2 回答 2

2

要实现这一点,您应该将上次访问的日期存储在某处(db、sharedpreferences、在文件中),然后:

long lastVistedDateTime = getLastVistedDateTime();
int lastDay = new Date(lastVistedDateTime).getDay();
int today = Calendar.get(Calendar.DATE);
if (today != lastDay){
    //an other day
    setLastVistedDateTime(Calendar.getInstance().getTimeInMillis());
}

要将日期与当前区域设置进行比较,请使用:

String lastDate = DateFormat.getDateInstance(DateFormat.MEDIUM).format(new Date(lastVistedDateTime));
String nowDate = DateFormat.getDateInstance(DateFormat.MEDIUM).format(new Date());
if (!nowDate.equals(lastDate)){
    //an other day
    setLastVistedDateTime(Calendar.getInstance().getTimeInMillis());
}
于 2012-12-30T09:41:53.793 回答
2

我认为总的来说 gezdy 的回答有正确的方法,但我想提出一个简化。

Calendar.DAY_OF_YEAR http://docs.oracle.com/javase/6/docs/api/java/util/Calendar.html#DAY_OF_YEAR

为您提供一年中的当前日期 (1-365)。因此,与其以毫秒为单位进行任何数学运算,不如抓住该值并将其存储,并在随后的尝试中进行比较。应该将 gezdy 的答案中的代码减少到大约 3 行(同时做同样的事情)。

唯一可能的缺点是

  1. 用户可以更改其设备上的时钟
  2. 如果用户一年只使用一次应用程序,然后在一年后的同一天再次使用,则用户可能会遇到应用程序使用被意外阻止的情况。(不大可能)。
于 2012-12-30T09:56:37.947 回答