从 DialogFragments 中的两个 TimePickers 中检索时间

Question

我在 activity 中有一个输入表单，我想在其中检索事件的开始时间和结束时间。我正在使用显示在对话框片段中的时间选择器来获取开始时间并将其 return 传递给主 activity，但是如何重新使用相同的逻辑来检索事件的结束时间？我的代码：

主要Activity:

public class AddEventActivity extends AppCompatActivity implements TimePickerDialog.OnTimeSetListener{
private int pickerHour = 0;
private int pickerMin = 0;

//code ommitted for length

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

public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
    String amOrPm = "am";
    pickerHour = hourOfDay;
    pickerMin = minute;
    String minutesString = "";
    if (hourOfDay > 12){ //translate to 12 hr clock. Little workaround to get both timepicker and am/pm label to show up correctly.
                amOrPm = "pm";
                pickerHour-=12;
            }
            if (pickerMin < 10) {
                minutesString = "0"; //fix weird bug where only one zero is shown on times ending in :00
            }
    startTimeView.setText(pickerHour + " : " + minutesString + pickerMin + " " +amOrPm );
}

TimePickerFragment:

public class TimePickerFragment extends DialogFragment {
int hour,minute;
private Activity mActivity;
private TimePickerDialog.OnTimeSetListener mListener;

@Override
public void onAttach(Activity activity) {
    super.onAttach(activity);
    mActivity = activity;
    try {
        mListener = (TimePickerDialog.OnTimeSetListener) activity;
    } catch (ClassCastException e) {
        throw new ClassCastException(activity.toString() + " must implement OnTimeSetListener");
    }
}

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    final Calendar c = Calendar.getInstance();
    hour = c.get(Calendar.HOUR_OF_DAY);
    minute = c.get(Calendar.MINUTE);

    return new TimePickerDialog(mActivity, mListener, hour, minute,
            DateFormat.is24HourFormat(mActivity));
}

}

我需要能够区分开始时间和结束时间，但我不确定如何在不重复的情况下区分它们。我对 Java 和 Android 很陌生。非常感谢您的帮助。

Answer 1

这需要您能够从 TimePickerFragment

中检索 TimePicker

您需要在创建两个 TimePickerFragment 时获取 TimePicker 实例并将它们存储在两个字段中，例如 startTimePicker 和 finishTimePicker.

然后当 TimePicker 通过 onTimeSet 传入时，您然后检查哪个 TimePicker 是这样。

if ( timePicker == startTimePicker ) {
      startTimeTextView.setText....
} else {
      finishTimeTextView.setText...
}

Answer 2

可能像布尔值一样简单？

public class AddEventActivity extends AppCompatActivity implements TimePickerDialog.OnTimeSetListener{
    ...
    boolean isSettingStartTime = true;


    //code ommitted for length

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

    public void onTimeSet(TimePicker view, int hourOfDay, int minute) {

        ...

        if (isSettingStartTime) {
            startTimeView.setText(pickerHour + " : " + minutesString + pickerMin + " " +amOrPm );
            isSettingStartTime = false;
        } else {
            endTimeView.setText(pickerHour + " : " + minutesString + pickerMin + " " +amOrPm );
        }
    }
}

从 DialogFragments 中的两个 TimePickers 中检索时间

Retrieving times from two TimePickers in DialogFragments

java

android

android-dialogfragment

android-timepicker