Merge variables.

#1004 (comment)

Author: TatsunoriMorita

android/src/main/java/com/reactcommunity/rndatetimepicker/Common.java

@@ -96,9 +96,9 @@ public static DialogInterface.OnShowListener setButtonTextColor(@NonNull final C
 	}
 
   @NonNull
-  public static DialogInterface.OnShowListener openYearDialog(final AlertDialog dialog, final boolean canOpenYearDialog, final boolean showYearPickerFirst) {
+  public static DialogInterface.OnShowListener openYearDialog(final AlertDialog dialog, final boolean canOpenYearDialog) {
     return dialogInterface -> {
-      if (canOpenYearDialog && showYearPickerFirst && dialog instanceof DatePickerDialog datePickerDialog) {
+      if (canOpenYearDialog && dialog instanceof DatePickerDialog datePickerDialog) {
         DatePicker datePicker = datePickerDialog.getDatePicker();
 
         int yearId = Resources.getSystem().getIdentifier("date_picker_header_year", "id", "android");

android/src/main/java/com/reactcommunity/rndatetimepicker/RNDatePickerDialogFragment.java

@@ -103,11 +103,10 @@ private DatePickerDialog createDialog(Bundle args) {
       if (activityContext != null) {
         RNDatePickerDisplay display = getDisplayDate(args);
         boolean needsColorOverride = display == RNDatePickerDisplay.SPINNER;
-        boolean canOpenYearDialog = display == RNDatePickerDisplay.DEFAULT;
-        boolean showYearPickerFirst = args.getBoolean(RNConstants.ARG_SHOW_YEAR_PICKER_FIRST);
+        boolean canOpenYearDialog = display == RNDatePickerDisplay.DEFAULT && args.getBoolean(RNConstants.ARG_SHOW_YEAR_PICKER_FIRST);
         dialog.setOnShowListener(
           combine(
-            openYearDialog(dialog, canOpenYearDialog, showYearPickerFirst),
+            openYearDialog(dialog, canOpenYearDialog),
             setButtonTextColor(activityContext, dialog, args, needsColorOverride)
           )
         );