Question

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点击一次该菜单，不再需要。我怎么能做到这一点？这是我到目前为止所做的：

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();
}

这允许我多次选择菜单，如何将其限制为每天只能点击一次？感谢您的任何帮助。

Answer 1

要实现这一点，你应该在某个地方存储上次访问的日期（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());
}

Answer 2

我认为一般来说gezdy的答案有正确的方法，但我想提出一个简化方法。

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，不是用毫秒进行任何数学计算，只需获取该值并存储它，并在后续尝试中进行比较。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

用户可以更改设备上的时钟
如果用户只使用一次应用程序，则可能会出现意外的应用程序使用预防一年后再回到一年后的同一天。（极不可能）。

允许用户每天在Android中点击一次菜单

2 个答案: