MFC实现子控件focus焦点上下移动父控件ListView和Gridview也跟着向上下移动

项目中要实现mfc功能，然后子控件焦点下移，LIstView和Gridview父控件不会下移，所以就有这个文章。废话不多说直接上代码。

MFCGridView.java

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewParent;
import android.view.ViewTreeObserver;
import android.widget.GridView;

import com.baidu.navisdk.ui.util.MFCUtil;

public class MFCGridView extends GridView {
    protected int lastPosition = -1;

    protected boolean mHasRegister = false;
    private final ViewTreeObserver.OnGlobalFocusChangeListener mFocusChangeListener =
            new ViewTreeObserver.OnGlobalFocusChangeListener() {
                @Override
                public void onGlobalFocusChanged(View oldFocus, View newFocus) {
                    if (!isInTouchMode()) {
                        refreshListViewScroll(oldFocus, newFocus);
                    }
                }
            };

    protected void refreshListViewScroll(View oldFocus, View newFocus) {
        if (getVisibility() != VISIBLE) {
            return;
        }
        if (newFocus == null) {
            return;
        }
        ViewParent convertView = getConvertView(newFocus);
        if (convertView == null) {
            return;
        }
        if (!(convertView instanceof View)) {
            return;
        }
        Object tagView = ((View) convertView).getTag();
        if (!(tagView instanceof IMFCHolder)) {
            if (lastPosition
                    != getAdapter().getCount() - 1) {
                smoothScrollToPositionFromTop(0, 0);
                lastPosition = -1;
            }
            return;
        }
        int focusedPosition = -1;
        View focusedChild =  getFocusedChild();
        if (focusedChild != null) {
            focusedPosition =  getPositionForView(focusedChild);
        }
        if (focusedPosition != lastPosition) {
            smoothScrollToPositionFromTop(focusedPosition, 50);
            lastPosition = focusedPosition;
        }
    }

    protected ViewParent getConvertView(View newFocus) {
        ViewParent lastView = null;
        ViewParent parent = newFocus.getParent();
        if (parent == this){
            return (ViewParent) newFocus;
        }
        while (parent !&