Adding title for the date picker dialog if the calendar is not shown.

1. The date picker dialog shows spinners and a mini calendar on
   tablet but on on phone the calendar is not show and the user
   does not know the day of the week otherwise show on the mini
   calendar.

bug:5264972

Change-Id: I06aeb7ba1ad34d4e99628d9586ff2777e981c963

Author: sganov

core/java/android/app/DatePickerDialog.java

@@ -16,17 +16,20 @@
 
 package android.app;
 
-import com.android.internal.R;
-
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.DialogInterface.OnClickListener;
 import android.os.Bundle;
+import android.text.format.DateUtils;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.widget.DatePicker;
 import android.widget.DatePicker.OnDateChangedListener;
 
+import com.android.internal.R;
+
+import java.util.Calendar;
+
 /**
  * A simple dialog containing an {@link android.widget.DatePicker}.
  *
@@ -42,6 +45,9 @@ public class DatePickerDialog extends AlertDialog implements OnClickListener,
 
     private final DatePicker mDatePicker;
     private final OnDateSetListener mCallBack;
+    private final Calendar mCalendar;
+
+    private boolean mTitleNeedsUpdate = true;
 
     /**
      * The callback used to indicate the user is done filling in the date.
@@ -91,17 +97,19 @@ public DatePickerDialog(Context context,
 
         mCallBack = callBack;
 
+        mCalendar = Calendar.getInstance();
+
         Context themeContext = getContext();
         setButton(BUTTON_POSITIVE, themeContext.getText(R.string.date_time_done), this);
         setIcon(0);
-        setTitle(R.string.date_picker_dialog_title);
 
         LayoutInflater inflater =
                 (LayoutInflater) themeContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
         View view = inflater.inflate(R.layout.date_picker_dialog, null);
         setView(view);
         mDatePicker = (DatePicker) view.findViewById(R.id.datePicker);
         mDatePicker.init(year, monthOfYear, dayOfMonth, this);
+        updateTitle(year, monthOfYear, dayOfMonth);
     }
 
     public void onClick(DialogInterface dialog, int which) {
@@ -110,7 +118,8 @@ public void onClick(DialogInterface dialog, int which) {
 
     public void onDateChanged(DatePicker view, int year,
             int month, int day) {
-        mDatePicker.init(year, month, day, null);
+        mDatePicker.init(year, month, day, this);
+        updateTitle(year, month, day);
     }
 
     /**
@@ -147,6 +156,28 @@ protected void onStop() {
         super.onStop();
     }
 
+    private void updateTitle(int year, int month, int day) {
+        if (!mDatePicker.getCalendarViewShown()) {
+            mCalendar.set(Calendar.YEAR, year);
+            mCalendar.set(Calendar.MONTH, month);
+            mCalendar.set(Calendar.DAY_OF_MONTH, day);
+            String title = DateUtils.formatDateTime(mContext,
+                    mCalendar.getTimeInMillis(),
+                    DateUtils.FORMAT_SHOW_DATE
+                    | DateUtils.FORMAT_SHOW_WEEKDAY
+                    | DateUtils.FORMAT_SHOW_YEAR
+                    | DateUtils.FORMAT_ABBREV_MONTH
+                    | DateUtils.FORMAT_ABBREV_WEEKDAY);
+            setTitle(title);
+            mTitleNeedsUpdate = true;
+        } else {
+            if (mTitleNeedsUpdate) {
+                mTitleNeedsUpdate = false;
+                setTitle(R.string.date_picker_dialog_title);
+            }
+        }
+    }
+
     @Override
     public Bundle onSaveInstanceState() {
         Bundle state = super.onSaveInstanceState();