Question

我有一项活动，我已经覆盖了optionsMenu。它有3个按钮，一个用于获取前一个rota，一个用于获取下一个rota，第三个按钮位于选项菜单上，应该显示一个数据按钮，用户可以在其中选择自己想要看到的旋转日期。如何将DatePicker侦听器附加到选项菜单中的“今天”按钮？

public void setCurrentDateOnView() {

        dpResult = (DatePicker) findViewById(R.id.datepicker1);

        final Calendar c = Calendar.getInstance();
        year = c.get(Calendar.YEAR);
        month = c.get(Calendar.MONTH);
        day = c.get(Calendar.DAY_OF_MONTH);

        // set current date into datepicker
        // dpResult.init(year, month, day, null);

    }


    public boolean onCreateOptionsMenu(Menu menu) {
            MenuInflater inflater = getMenuInflater();
            inflater.inflate(R.menu.menurotadetails, menu);
            return true;
        }

        public boolean onOptionsItemSelected(MenuItem item) {
            switch (item.getItemId()) {
            case R.id.previous:
                DateTime now2 = nfcscannerapplication.getDate();
                Log.e(TAG, "now2 = " + now2);
                DateTime dateTimePlusOne2 = now2.minusDays(1);
                Log.e(TAG, "now2 after -1 = " + dateTimePlusOne2);
                nfcscannerapplication.setDate(dateTimePlusOne2);
                DateTimeFormatter fmt2 = DateTimeFormat.forPattern("d-MMM-Y");
                String nextDay2 = fmt2.print(dateTimePlusOne2);

                Intent i2 = new Intent(this, NfcscannerActivity.class);
                i2.putExtra("nextRota", nextDay2);
                i2.setAction("NEXT_ROTA");
                startActivity(i2);
                return true;

            case R.id.next:

                DateTime now = nfcscannerapplication.getDate();
                Log.e(TAG, "now = " + now);
                DateTime dateTimePlusOne = now.plusDays(1);
                Log.e(TAG, "now after +1 = " + dateTimePlusOne);
                nfcscannerapplication.setDate(dateTimePlusOne);
                DateTimeFormatter fmt = DateTimeFormat.forPattern("d-MMM-Y");
                String nextDay = fmt.print(dateTimePlusOne);

                Intent i = new Intent(this, NfcscannerActivity.class);
                i.putExtra("nextRota", nextDay);
                i.setAction("NEXT_ROTA");
                startActivity(i);
                return true;

            case R.id.today:
                setCurrentDateOnView();
                return true;

            default:

                return super.onOptionsItemSelected(item);
            }
        }


        public void addListenerOnButton() {



            ??????.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {

                    showDialog(DATE_DIALOG_ID);

                }

            });

        }



        @Override
        protected Dialog onCreateDialog(int id) {
            switch (id) {
            case DATE_DIALOG_ID:
                // set date picker as current date
                return new DatePickerDialog(this, datePickerListener, year, month,
                        day);
            }
            return null;
        }

        private DatePickerDialog.OnDateSetListener datePickerListener = new DatePickerDialog.OnDateSetListener() {

            // when dialog box is closed, below method will be called.
            public void onDateSet(DatePicker view, int selectedYear,
                    int selectedMonth, int selectedDay) {
                year = selectedYear;
                month = selectedMonth;
                day = selectedDay;



                // set selected date into datepicker also
                dpResult.init(year, month, day, null);

            }
        };

。 [更新] 抱歉没想到，我刚才做了以下

case R.id.today:
            setCurrentDateOnView();
            showDialog(DATE_DIALOG_ID);
            return true;

Answer 1

试试这个

public void setCurrentDateOnView() {
                // your code
                showDialog(DATE_DIALOG_ID);

        });

希望这对您有用。

Answer 2

case R.id.today:
            setCurrentDateOnView();
            showDialog(DATE_DIALOG_ID);
            return true;

Android将DatePicker侦听器附加到选项菜单按钮

2 个答案: