<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
>
<ListView
android:id="@+id/lv_menu"
android:layout_weight="1"
android:layout_height="match_parent"
android:layout_width="wrap_content" />
<ListView
android:id="@+id/lv_item"
android:layout_height="match_parent"
android:layout_weight="2"
android:layout_width="wrap_content" />
</LinearLayout>

mListMenu.setOnItemClickListener(new ListView.OnItemClickListener(){
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
//設(shè)置當(dāng)前點(diǎn)擊項(xiàng)為i項(xiàng)
mMenuAdapter.setSelectItem(i);
mMenuAdapter.notifyDataSetInvalidated();//
//設(shè)置ItemListView的點(diǎn)擊項(xiàng)為i項(xiàng)的第一個(gè)item
mListItem.setSelection(mTitleList.get(i));
}
});

mTitleList = new ArrayList<Integer>();
//遍歷所有item.size(),然后將第一個(gè)title不同的項(xiàng)對(duì)應(yīng)的值保存起來(lái)，則關(guān)聯(lián)到每一個(gè)item對(duì)應(yīng)到size中的值
for (int i=0;i<mfoodDatas.size();i++){
　　if (i==0){
　　mTitleList.add(i);
}else if(!TextUtils.equals(mfoodDatas.get(i).getTitle(),mfoodDatas.get(i-1).getTitle())){
mTitleList.add(i);
}
}

mListItem.setOnScrollListener(new AbsListView.OnScrollListener() {
private int scrollState;
@Override
public void onScrollStateChanged(AbsListView absListView, int i) {
this.scrollState = i;
}
@Override
public void onScroll(AbsListView absListView,
int firstVisibleItem,
int visibleItemCount,
int totalItemCount) {
if(scrollState== AbsListView.OnScrollListener.SCROLL_STATE_IDLE){
return;
}
//判斷當(dāng)前的item是否是view中第一個(gè)可見(jiàn)的item
int current = mTitleList.indexOf(firstVisibleItem);
if(current!=currentItem && current>0){
currentItem=current;
//若不是的話，將menuListView的item設(shè)置currentItem，來(lái)與itemListView關(guān)聯(lián)
mMenuAdapter.setSelectItem(currentItem);
mMenuAdapter.notifyDataSetInvalidated();
}
}
});