Question

当我尝试永久设置DatePickerDialog标题时，我遇到了问题。

DatePickerFragment.java

public class DatePickerFragment extends DialogFragment implements DatePickerDialog.OnDateSetListener {

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {

    // Use the current date as the default date in the picker
    final Calendar c = Calendar.getInstance();
    int year = c.get(Calendar.YEAR);
    int month = c.get(Calendar.MONTH);
    int day = c.get(Calendar.DAY_OF_MONTH);

    // Create a new instance of DatePickerDialog and return it
    DatePickerDialog dpd = new DatePickerDialog(getActivity(), this, year, month, day);
    dpd.setTitle("set date");
    return dpd;
    }

    public void onDateSet(DatePicker view, int year, int month, int day) {
    // Do something with the date chosen by the user
    }
}

MainActivity.java

public class MainActivity extends FragmentActivity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Button btn = (Button) findViewById(R.id.button1);

        btn.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {
                DialogFragment newFragment = new DatePickerFragment();
                newFragment.show(getSupportFragmentManager(), "datePicker");

            }
        });
    }
}

当我点击按钮DatePickerDialog显示并且对话框标题是“设置日期”但是当我更改日期时，标题包含所选日期而不是“设置日期”。如何永久设置此对话框标题？

在API 8-10上测试。

提前谢谢你，对不起我的英语。帕特里克

Answer 1

如何扩展DatePickerDialog并添加setPermanentTitle方法来存储将在日期更改时强制使用的永久标题？

public class MyDatePickerDialog extends DatePickerDialog {

    private CharSequence title;

    public MyDatePickerDialog(Context context, OnDateSetListener callBack, int year, int monthOfYear, int dayOfMonth) {
        super(context, callBack, year, monthOfYear, dayOfMonth);
    }

    public void setPermanentTitle(CharSequence title) {
        this.title = title;
        setTitle(title);
    }

    @Override
    public void onDateChanged(DatePicker view, int year, int month, int day) {
        super.onDateChanged(view, year, month, day);
        setTitle(title);
    }
}

然后使用新的setPermanentTitle方法：

    MyDatePickerDialog dpd = new MyDatePickerDialog(this, null, 2012, 10, 10);
    dpd.setPermanentTitle("set date");

Answer 2

扩展DatePickerDialog并覆盖setTitle（）方法。

public class MyDatePickerDialog extends DatePickerDialog {

   public MyDatePickerDialog(Context context, OnDateSetListener callBack, int year, int monthOfYear, int dayOfMonth) {
       super(context, callBack, year, monthOfYear, dayOfMonth);
   }

   public void setTitle(CharSequence title) {
       super.setTitle(*<whatever title you want>*);
   }
}

Answer 3

您始终可以使用AlertDialog并致电setView传递DatePicker的实例。

请参阅下面的示例代码：

DatePicker datePicker = new DatePicker(getActivity());
    datePicker.setCalendarViewShown(false);

new AlertDialog.Builder(getActivity())
    .setTitle("Your title")
    .setView(datePicker)
    .create().show();

这将确保标题仅由您设置。

Answer 4

按如下方式创建自定义标题：

TextView title = new TextView(getActivity());
title.setText(getResources().getString(R.string.calendar_start_title));
datePickerDialog.setCustomTitle(title);

Answer 5

考虑到小屏幕上的用户体验，我建议不要将标题永久保留。这是John的代码的修改：

public class MyDatePickerDialog extends DatePickerDialog {

    private CharSequence title;

    public MyDatePickerDialog(Context context, OnDateSetListener callBack, int year, int monthOfYear, int dayOfMonth, CharSequence title) {
        super(context, callBack, year, monthOfYear, dayOfMonth);
        this.title = title;
        setTitle(title);
    }

    @Override
    public void onDateChanged(DatePicker view, int year, int month, int day) {
        super.onDateChanged(view, year, month, day);
        if (getDatePicker().getCalendarViewShown()) {
            setTitle(title);
        }
    }
}

按以下方式拨打DatePickerDialog：

MyDatePickerDialog datePickerDialog = new MyDatePickerDialog(this, null, 2012, 10, 10, "My Title");

永久设置DatePickerDialog标题

5 个答案: