Fix couple of issues in DatePicker

The NumberPicker's listener needs to be invoked only if
the current value changes when validating input.
This removes the some unwanted duplicate calls to onChanged.
Adjust day for month and leap years. note that updateDaySpinner
directly sets the value on day picker and doesn't invoke the
listener twice

1 files changed, 15 insertions, 0 deletions

diff --git a/core/java/android/widget/DatePicker.java b/core/java/android/widget/DatePicker.java
index 54f2707..3b9f1de 100644
--- a/core/java/android/widget/DatePicker.java
+++ b/core/java/android/widget/DatePicker.java
@@ -110,6 +110,8 @@ public class DatePicker extends FrameLayout {
                  * subtract by one to ensure our internal state is always 0-11
                  */
                 mMonth = newVal - 1;
+                // Adjust max day of the month
+                adjustMaxDay();
                 if (mOnDateChangedListener != null) {
                     mOnDateChangedListener.onDateChanged(DatePicker.this, mYear, mMonth, mDay);
                 }
@@ -121,9 +123,12 @@ public class DatePicker extends FrameLayout {
         mYearPicker.setOnChangeListener(new OnChangedListener() {
             public void onChanged(NumberPicker picker, int oldVal, int newVal) {
                 mYear = newVal;
+                // Adjust max day for leap years if needed
+                adjustMaxDay();
                 if (mOnDateChangedListener != null) {
                     mOnDateChangedListener.onDateChanged(DatePicker.this, mYear, mMonth, mDay);
                 }
+                updateDaySpinner();
             }
         });
         
@@ -318,4 +323,14 @@ public class DatePicker extends FrameLayout {
     public int getDayOfMonth() {
         return mDay;
     }
+
+    private void adjustMaxDay(){
+        Calendar cal = Calendar.getInstance();
+        cal.set(Calendar.YEAR, mYear);
+        cal.set(Calendar.MONTH, mMonth);
+        int max = cal.getActualMaximum(Calendar.DAY_OF_MONTH);
+        if (mDay > max) {
+            mDay = max;
+        }
+    }
 }