✏️ Add the OnScrollListener example

Author: ShawnLin013

README.md

@@ -100,6 +100,16 @@ numberPicker.setOnValueChangedListener(new NumberPicker.OnValueChangeListener()
         Log.d(TAG, String.format(Locale.US, "oldVal: %d, newVal: %d", oldVal, newVal));
     }
 });
+
+// OnScrollListener
+numberPicker.setOnScrollListener(new NumberPicker.OnScrollListener() {
+    @Override
+    public void onScrollStateChange(NumberPicker picker, int scrollState) {
+        if (scrollState == SCROLL_STATE_IDLE) {
+            Log.d(TAG, String.format(Locale.US, "newVal: %d", picker.getValue()));
+        }
+    }
+});
 ```
 
 #### XML

sample/src/main/java/com/shawnlin/numberpicker/sample/MainActivity.java

@@ -102,6 +102,16 @@ public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
                 Log.d(TAG, String.format(Locale.US, "oldVal: %d, newVal: %d", oldVal, newVal));
             }
         });
+
+        // OnScrollListener
+        numberPicker.setOnScrollListener(new NumberPicker.OnScrollListener() {
+            @Override
+            public void onScrollStateChange(NumberPicker picker, int scrollState) {
+                if (scrollState == SCROLL_STATE_IDLE) {
+                    Log.d(TAG, String.format(Locale.US, "newVal: %d", picker.getValue()));
+                }
+            }
+        });
     }
 
 }