自定義NumberPicker，更改字體顏色、分割線樣式

---------------重寫NumberPicker已達到修改顯示字體顏色大小------------------

public class TextColorNumberPicker extends NumberPicker {
    public TextColorNumberPicker(Context context) {
        super(context);
    }

    public TextColorNumberPicker(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public TextColorNumberPicker(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    public void addView(View child) {
        super.addView(child);
        updateView(child);
    }

    @Override
    public void addView(View child, int index,
                        android.view.ViewGroup.LayoutParams params) {
        super.addView(child, index, params);
        updateView(child);
    }

    @Override
    public void addView(View child, android.view.ViewGroup.LayoutParams params) {
        super.addView(child, params);
        updateView(child);
    }

    public void updateView(View view) {
        if (view instanceof EditText) {
            //這裏修改顯示字體的屬性，主要修改顏色
//            ((EditText) view).setTextColor(Color.parseColor("#BAA785"));
            ((EditText) view).setTextSize(12);
        }
    }

-----修改分割線顏色和線寬，需要在初始化控件後，通過反射進行動態設置顏色。---

**********注意：在NumberPicker 的 setDisplayedValues調用後調用如下方法：

    public void setNumberPickerDividerColor(NumberPicker numberPicker) {
        NumberPicker picker = numberPicker;
        Field[] pickerFields = NumberPicker.class.getDeclaredFields();
        for (Field pf : pickerFields) {
            if (pf.getName().equals("mSelectionDivider")) {
                pf.setAccessible(true);
                try {
                    //設置分割線的顏色值 透明
                    pf.set(picker, new ColorDrawable(this.getResources().getColor(R.color.diver_gray)));
                } catch (IllegalArgumentException e) {
                    e.printStackTrace();
                } catch (Resources.NotFoundException e) {
                    e.printStackTrace();
                } catch (IllegalAccessException e) {
                    e.printStackTrace();
                }
                break;
            }
        }
        // 分割線高度
        for (Field pf2 : pickerFields) {
            if (pf2.getName().equals("mSelectionDividerHeight")) {
                pf2.setAccessible(true);
                try {
                    int result = 3;
                    pf2.set(picker, result);
                } catch (Exception e) {
                    e.printStackTrace();
                }
                break;
            }
        }

    }

*************************使用方法******************************

TextColorNumberPicker num_picker =(TextColorNumberPicker) dateTimeLayout.findViewById(R.id.num_picker);
num_picker.setNumberPickerDividerColor(num_picker);