Question

在我的活动中，我有2个TextViews。用户可以点击这些TextView来设置开始和结束日期。我使用的是DatePickerDialog，在点按TextView时会显示该日期。

到目前为止，我的代码：

class DatePickerFragment: DialogFragment() {

    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
        val c = Calendar.getInstance()
        val year = c.get(Calendar.YEAR)
        val month = c.get(Calendar.MONTH)
        val day = c.get(Calendar.DAY_OF_MONTH)
        return DatePickerDialog(activity, activity as DatePickerDialog.OnDateSetListener, year, month, day)
    }
}

class ReportsActivity : AppCompatActivity(), DatePickerDialog.OnDateSetListener {

    override fun onDateSet(view: DatePicker?, year: Int, month: Int, dayOfMonth: Int) {
        val c = Calendar.getInstance()
        c.set(Calendar.YEAR, year)
        c.set(Calendar.MONTH, month)
        c.set(Calendar.DAY_OF_MONTH, dayOfMonth)
        val dateString = DateFormat.getDateInstance(DateFormat.FULL).format(c.time)

        // need someway to detect if this is for startDate or endDate
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_report)

        startDateTextView.setOnClickListener {
            val datePicker = DatePickerFragment()
            datePicker.show(supportFragmentManager, "start")
        }

        endDateTextView.setOnClickListener {
            val datePicker = DatePickerFragment()
            datePicker.show(supportFragmentManager, "end")
        }
    }
}

我需要某种方法来检测用户是否从startDateTextView或endDateTextView中打开DatePickerDialog，以便可以相应地设置相应的TextView的文本。

Answer 1

您可以在textView onClicklistner上设置DateListner。

override fun onDateSet(view: DatePicker?, year: Int, month: Int, dayOfMonth: Int) {
    val c = Calendar.getInstance()
    c.set(Calendar.YEAR, year)
    c.set(Calendar.MONTH, month)
    c.set(Calendar.DAY_OF_MONTH, dayOfMonth)
    val dateString = DateFormat.getDateInstance(DateFormat.FULL).format(c.time)

    // need someway to detect if this is for startDate or endDate
    updateDisplay();
    updateTextView();
}

private void updateDisplay() {
    ((TextView) touchedView).setText(
        new StringBuilder()
                .append(pad(dayOfMonth)).append(".")
                .append(pad(month)).append(".")
                .append(pad(year)));
}

private void updateTextView() {
    ((EditText) touchedView).setText(
        new StringBuilder()
                .append(pad(dayOfMonth)).append(".")
                .append(pad(month)).append(".")
                .append(pad(year)));
}

在您的片段中添加dateListener

     DateListener dateListener = new DateListener(getActivity());

     textView.setOnClickListener(dateListener);

您还可以看到Getting data from a DatePickerDialog to a fragment

如何使用DatePickerDialog设置开始和结束日期？

1 个答案: