optimization code

Author: zengsong

pickerview/src/main/java/com/bigkoo/pickerview/view/OptionsPickerView.java

@@ -20,7 +20,7 @@
  */
 public class OptionsPickerView<T> extends BasePickerView implements View.OnClickListener {
 
-    private WheelOptions wheelOptions;
+    private WheelOptions<T> wheelOptions;
 
     private static final String TAG_SUBMIT = "submit";
     private static final String TAG_CANCEL = "cancel";
@@ -76,7 +76,7 @@ private void initView(Context context) {
         final LinearLayout optionsPicker = (LinearLayout) findViewById(R.id.optionspicker);
         optionsPicker.setBackgroundColor(mPickerOptions.bgColorWheel);
 
-        wheelOptions = new WheelOptions(optionsPicker, mPickerOptions.isRestoreItem);
+        wheelOptions = new WheelOptions<>(optionsPicker, mPickerOptions.isRestoreItem);
         if (mPickerOptions.optionsSelectChangeListener != null) {
             wheelOptions.setOptionsSelectChangeListener(mPickerOptions.optionsSelectChangeListener);
         }