如何为 Android 片段内的文本视图显示或设置日期选择器对话框？

Question

我绝对是 Android 的初学者。我正在尝试使用日期选择器对话框为片段内的文本字段设置文本。

这是 activity

中的文本字段片段

public class CreateTaskFragment extends Fragment{
    private Button saveBtn;
    private EditText tfDescription,tfDate;
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.create_task,container,false);

        tfDescription = (EditText)view.findViewById(R.id.tf_task_description);
        tfDate = (EditText)view.findViewById(R.id.tf_task_date);
        tfDate.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                DialogFragment pickerFragment = new SelectDateFragment();
                pickerFragment.show(getFragmentManager(),"DatePicker");
            }
        });

        saveBtn = (Button)view.findViewById(R.id.btn_save_task);
        saveBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                saveTask();
            }
        });

        return view;
    }

    public void saveTask()
    {
        String description = tfDescription.getText().toString();
        String date = tfDate.getText().toString();
    }
}

这是选择器的对话框片段

public class SelectDateFragment extends DialogFragment implements DatePickerDialog.OnDateSetListener {

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        final Calendar calendar = Calendar.getInstance();
        int yy = calendar.get(Calendar.YEAR);
        int mm = calendar.get(Calendar.MONTH);
        int dd = calendar.get(Calendar.DAY_OF_MONTH);
        return new DatePickerDialog(getActivity(), this, yy, mm, dd);
    }

    public void onDateSet(DatePicker view, int yy, int mm, int dd) {
        populateSetDate(yy, mm+1, dd);
    }
    public void populateSetDate(int year, int month, int day) {
        //set the date here

    }

}

我的问题是如何为上一个片段的文本字段设置选定日期。 Datepicker 正在工作，我不知道如何为编辑文本设置选定日期。

Answer 1

您可以将日期设置到描述的EditText。如：

 @Override
 public void onDateSet(DatePicker dialog, int year, int monthOfYear, int dayOfMonth) {
    //set the text of description
    tfDescription.setText("Year:" + year + " Month: " + monthOfYear + "Day: " + dayOfMonth);
    //get the data of date by using Calendar
    Calendar calendar = Calendar.getInstance();
    calendar.set(year,monthOfYear,dayOfMonth);
    mCurrentDate = calendar.getTimeInMillis();
}

表示可以访问@Override public void onDateSet

中Date的数据

Answer 2

为将获取 EditText 引用的 SelectDateFragment 创建构造函数，并在 onDate() 中将日期设置为该引用。就这么简单。

Answer 3

给你一个简单的解决方案，把OnClick里面的代码换成这个

public void onClick(View v) {

            final Calendar calendar = Calendar.getInstance();
            int yy = calendar.get(Calendar.YEAR);
            int mm = calendar.get(Calendar.MONTH);
            int dd = calendar.get(Calendar.DAY_OF_MONTH);
            DatePickerDialog datePicker = new DatePickerDialog(getActivity(), new DatePickerDialog.OnDateSetListener() {
                @Override
                public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
                    String date = "Date"+String.valueOf(year) +"-"+String.valueOf(monthOfYear)
                            +"-"+String.valueOf(dayOfMonth);
                    tfDescription.setText(date);
                    tfDate.setText(date);
                }
            }, yy, mm, dd);
            datePicker.show();

您会看到 tfDescription/tfDate 的 EditText 在您选择日期后发生了变化

如何为 Android 片段内的文本视图显示或设置日期选择器对话框？

How to show or set datepicker dialog for a textview that is inside a fragment in Android?

android

android-datepicker

android-fragments