Fix date picker bug

src/main/java/org/tasks/activities/DateAndTimePickerActivity.java

@@ -67,7 +67,9 @@ public class DateAndTimePickerActivity extends InjectingAppCompatActivity implem
     @Override
     public void onDateSet(DatePickerDialog datePickerDialog, int year, int month, int day) {
         dateSelected = true;
-        final long timestamp = initial.withYear(year).withMonthOfYear(month + 1).withDayOfMonth(day).getMillis();
+        final long timestamp = new DateTime(year, month + 1, day)
+                .withMillisOfDay(initial.getMillisOfDay())
+                .getMillis();
         datePickerDialog.dismiss();
         startActivity(new Intent(this, TimePickerActivity.class) {{
             addFlags(Intent.FLAG_ACTIVITY_FORWARD_RESULT);

src/main/java/org/tasks/activities/DatePickerActivity.java

@@ -26,8 +26,6 @@ public class DatePickerActivity extends InjectingAppCompatActivity
 
     @Inject ActivityPreferences preferences;
 
-    private DateTime initial;
-
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -35,7 +33,7 @@ public class DatePickerActivity extends InjectingAppCompatActivity
         preferences.applyTheme();
 
         long timestamp = getIntent().getLongExtra(EXTRA_TIMESTAMP, currentTimeMillis());
-        initial = timestamp > 0 ? new DateTime(timestamp) : new DateTime().startOfDay();
+        DateTime initial = (timestamp > 0 ? new DateTime(timestamp) : new DateTime()).startOfDay();
 
         FragmentManager fragmentManager = getFragmentManager();
         MyDatePickerDialog dialog = (MyDatePickerDialog) fragmentManager.findFragmentByTag(FRAG_TAG_DATE_PICKER);
@@ -51,15 +49,10 @@ public class DatePickerActivity extends InjectingAppCompatActivity
         dialog.setOnDateSetListener(this);
     }
 
-
     @Override
     public void onDateSet(DatePickerDialog view, final int year, final int monthOfYear, final int dayOfMonth) {
         setResult(RESULT_OK, new Intent() {{
-            putExtra(EXTRA_TIMESTAMP, initial
-                    .withYear(year)
-                    .withMonthOfYear(monthOfYear + 1)
-                    .withDayOfMonth(dayOfMonth)
-                    .getMillis());
+            putExtra(EXTRA_TIMESTAMP, new DateTime(year, monthOfYear + 1, dayOfMonth).getMillis());
         }});
     }
 

src/main/java/org/tasks/time/DateTime.java

@@ -17,6 +17,10 @@ public class DateTime {
     private final TimeZone timeZone;
     private final long timestamp;
 
+    public DateTime(int year, int month, int day) {
+        this(year, month, day, 0, 0, 0, 0);
+    }
+
     public DateTime(int year, int month, int day, int hour, int minute) {
         this(year, month, day, hour, minute, 0, 0);
     }

src/main/java/org/tasks/ui/DeadlineControlSet.java

@@ -206,7 +206,7 @@ public class DeadlineControlSet extends TaskEditControlFragment {
                 break;
             case 4:
                 startActivityForResult(new Intent(context, DatePickerActivity.class) {{
-                    putExtra(DatePickerActivity.EXTRA_TIMESTAMP, getDueDate());
+                    putExtra(DatePickerActivity.EXTRA_TIMESTAMP, date);
                 }}, REQUEST_DATE);
                 break;
         }
@@ -234,7 +234,7 @@ public class DeadlineControlSet extends TaskEditControlFragment {
                 break;
             case 6:
                 startActivityForResult(new Intent(context, TimePickerActivity.class) {{
-                    putExtra(TimePickerActivity.EXTRA_TIMESTAMP, getDueDate());
+                    putExtra(TimePickerActivity.EXTRA_TIMESTAMP, getDueDateTime());
                 }}, REQUEST_TIME);
                 break;
         }
@@ -257,7 +257,7 @@ public class DeadlineControlSet extends TaskEditControlFragment {
 
     @Override
     public boolean hasChanges(Task original) {
-        return original.getDueDate() != getDueDate();
+        return original.getDueDate() != getDueDateTime();
     }
 
     @Override
@@ -274,7 +274,7 @@ public class DeadlineControlSet extends TaskEditControlFragment {
 
     @Override
     public void apply(Task task) {
-        long dueDate = getDueDate();
+        long dueDate = getDueDateTime();
         if (dueDate != task.getDueDate()) {
             task.setReminderSnooze(0L);
         }
@@ -304,7 +304,7 @@ public class DeadlineControlSet extends TaskEditControlFragment {
         }
     }
 
-    private long getDueDate() {
+    private long getDueDateTime() {
         return time >= 0
                 ? Task.createDueDate(Task.URGENCY_SPECIFIC_DAY_TIME, newDateTime(date).withMillisOfDay(time).getMillis())
                 : Task.createDueDate(Task.URGENCY_SPECIFIC_DAY, date);