我遇到了同样的问题（用户不想逐月回溯 40 年以找到他们的出生年份，而且大多数人不知道您可以在 android 日期选择器中单击年份来滚动多年来）。和你一样，我无法让微调器通用，所以我想出了（在 SO 和 Google 的帮助下）如何让它在年份选择模式下启动。
我的DatePickerDialogFragment 的代码粘贴在下面。
public class DatePickerDialogFragment extends DialogFragment {
private DatePickerDialog.OnDateSetListener listener = null;
void setListener(DatePickerDialog.OnDateSetListener listener) {
this.listener = listener;
}
private static final String START_IN_YEARS = "com.myapp.picker.START_IN_YEARS";
private static final String YEAR = "com.myapp.picker.YEAR";
private static final String MONTH = "com.myapp.picker.MONTH";
private static final String DAY_OF_MONTH = "com.myapp.picker.DAY_OF_MONTH";
public static DatePickerDialogFragment newInstance(boolean startInYears, Calendar c) {
DatePickerDialogFragment f = new DatePickerDialogFragment();
int year = c.get(Calendar.YEAR);
int month = c.get(Calendar.MONTH);
int day = c.get(Calendar.DAY_OF_MONTH);
Bundle args = new Bundle();
args.putBoolean(START_IN_YEARS, startInYears);
args.putInt(YEAR, year);
args.putInt(MONTH, month);
args.putInt(DAY_OF_MONTH, day);
f.setArguments(args);
return f;
}
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
Bundle args = getArguments();
DatePickerDialog dpd = null;
if( listener != null && args != null) {
boolean startInYears = args.getBoolean(START_IN_YEARS);
Context context = getActivity();
boolean requireSpinnerMode = isBrokenSamsungDevice();
if (requireSpinnerMode) {
context = new ContextThemeWrapper(context, android.R.style.Theme_Holo_Light_Dialog);
}
int year = args.getInt(YEAR);
int month = args.getInt(MONTH);
int day = args.getInt(DAY_OF_MONTH);
dpd = new DatePickerDialog(context, listener, year, month, day);
if (startInYears && !requireSpinnerMode) {
boolean canOpenYearView = openYearView(dpd.getDatePicker());
if (!canOpenYearView) {
context = new ContextThemeWrapper(getActivity(), android.R.style.Theme_Holo_Light_Dialog);
dpd = new DatePickerDialog(context, listener, year, month, day);
}
}
}
else {
setShowsDialog(false);
dismissAllowingStateLoss();
}
return dpd;
}
private static boolean isBrokenSamsungDevice() {
return Build.MANUFACTURER.equalsIgnoreCase("samsung") &&
isBetweenAndroidVersions(
Build.VERSION_CODES.LOLLIPOP,
Build.VERSION_CODES.LOLLIPOP_MR1);
}
private static boolean isBetweenAndroidVersions(int min, int max) {
return Build.VERSION.SDK_INT >= min && Build.VERSION.SDK_INT <= max;
}
private static boolean openYearView(DatePicker datePicker) {
if( isBrokenSamsungDevice() ) {
return false;
}
View v = datePicker.findViewById(Resources.getSystem().getIdentifier("date_picker_header_year", "id", "android"));
if( v != null ) {
v.performClick();
}
else {
try {
Field mDelegateField = datePicker.getClass().getDeclaredField("mDelegate");
mDelegateField.setAccessible(true);
Object delegate = mDelegateField.get(datePicker);
Method setCurrentViewMethod = delegate.getClass().getDeclaredMethod("setCurrentView", int.class);
setCurrentViewMethod.setAccessible(true);
setCurrentViewMethod.invoke(delegate, 1);
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
return true;
}
}
Activity 中的代码（onCreate 中的成员变量和内容）启动它（并在旋转时保留它）如下所示：
// Class member variables
private Calendar myCalendar = Calendar.getInstance();
private boolean birthday_is_set = false;
// this next part is in onCreate
// set the calendar date to a saved date if applicable
// and change birthday_is_set if they had saved a birthday
final DatePickerDialog.OnDateSetListener birthdayListener = new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
// I save the date in a calendar, replace this
// with whatever you want to do with the selected date
myCalendar.set(Calendar.YEAR, year);
myCalendar.set(Calendar.MONTH, monthOfYear);
myCalendar.set(Calendar.DAY_OF_MONTH, dayOfMonth);
birthday_is_set = true;
updateBirthdayLabel();
}
};
if (savedInstanceState != null) {
DatePickerDialogFragment dpf;
dpf = (DatePickerDialogFragment) getFragmentManager().findFragmentByTag("birthdayDatePicker");
if (dpf != null) {
// on rotation the listener will be referring to the old Activity,
// so we have to reset it here to act on the current Activity
dpf.setListener(birthdayListener);
}
}
birthdayDatePicker.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// Your logic may vary here. I chose not to start it in year
// mode if they've already selected a date.
boolean startInYears = !birthday_is_set;
DatePickerDialogFragment dpf = DatePickerDialogFragment.newInstance(startInYears, myCalendar);
dpf.setListener(birthdayListener);
dpf.show(getFragmentManager(), "birthdayDatePicker");
}
});
这包括让它在年份模式下启动的 hack，以及针对特定年份三星设备上的一些随机日期选择器故障的修复。此版本已经运行了几个月，没有出现针对 API 15+ 的崩溃或用户投诉。
编辑：更新 openYearView 以在 Android 10 上运行