Android DatePickerDialog等待解散

Question

今天，imma试图开发一个简单的应用程序，它将要求用户通过按钮使用DatePickerDialog插入两个日期，然后在数据库中执行查询：

        Button.setOnClickListener(new OnClickListener(){

        @Override
        public void onClick(View arg0) {


          Da = new DatePickerDialog(MainActivity.this, DADateSetListener, 2014, 8, 24);
          Da.show();
          Da.setTitle("Date FROM");

          A = new DatePickerDialog(MainActivity.this, ADateSetListener, 2014, 10, 24);

          A.show();
          A.setTitle("Date TO");


          //Erase the List View
          List.setAdapter(null);

          prepareProgressBar();
          query();

        }

    });

我唯一的问题是:我如何等待DatePickerDialog执行，消除或等待用户输入输入，然后执行查询？

Answer 1

每个the docs

我们建议您使用DialogFragment来承载每个时间或日期选择器。

文档包括一个扩展DialogFragment (位于here)的示例类：

public static class TimePickerFragment extends DialogFragment
                            implements TimePickerDialog.OnTimeSetListener {

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        // Use the current time as the default values for the picker
        final Calendar c = Calendar.getInstance();
        int hour = c.get(Calendar.HOUR_OF_DAY);
        int minute = c.get(Calendar.MINUTE);

        // Create a new instance of TimePickerDialog and return it
        return new TimePickerDialog(getActivity(), this, hour, minute,
                DateFormat.is24HourFormat(getActivity()));
    }

    public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
        // Do something with the time chosen by the user
    }
}

您可以像这样显示它(同样，来自the docs的代码)：

public void showTimePickerDialog(View v) {
    DialogFragment newFragment = new TimePickerFragment();
    newFragment.show(getSupportFragmentManager(), "timePicker");
}

而且，作为一个额外的好处，这个对话框确实是的(当你说“等待解除”时，你想要的就是这个)。

Answer 2

这是一个简单的对话框，我不明白你为什么不使用默认的监听器：

DatePickerDialog dpd;
dpd.setOnDismissListener(new DialogInterface.OnDismissListener() {
    @Override
    public void onDismiss(DialogInterface dialog) {
        // Handle dismiss
    }
});
dpd.setOnKeyListener(new DialogInterface.OnKeyListener() {
    @Override
    public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) {
        // Handle clicks
        return false;
    }
});