Question

今天imma尝试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2个日期，然后执行查询到数据库：

        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解除或等待用户输入输入然后执行查询？

Answer 1

每the docs：

我们建议您使用DialogFragment托管每个时间或日期选择器。

文档包含一个扩展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
    }
}

你会像这样展示它（再次来自the docs的代码）：

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

而且，作为一个额外的奖励，这个对话框确实是 modal （当你说＆＃34;等待解雇＆＃34时你想要的是什么）。

Answer 2

这是一个简单的对话框，我不明白为什么你不使用默认的听众：

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;
    }
});

Android DatePickerDialog等待解雇

2 个答案: