Android使用Scroll+Fragment仿京东分类效果

<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" 
  tools:context="www.jdsort.com.jdsort.MainActivity"  
 
  <ScrollView 
    android:id="@+id/scrollview" 
    android:layout_width="0dp" 
    android:layout_height="wrap_content" 
    android:layout_weight="1" 
    android:scrollbars="none"  
    <LinearLayout 
      android:id="@+id/linearlayout" 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" 
      android:gravity="center_horizontal" 
      android:orientation="vertical" /  
  </ScrollView  
 
  <FrameLayout 
    android:id="@+id/framelayout" 
    android:layout_width="0dp" 
    android:layout_height="match_parent" 
    android:layout_weight="3"/  
</LinearLayout  

public class MainActivity extends FragmentActivity implements View.OnClickListener { 
private String[] titles={"常用分类","潮流女装","品牌男装","内衣配饰","家用电器","手机数码","电脑办公","个护化妆","母婴频道","食物生鲜","酒水饮料","家居家纺","整车车品","鞋靴箱包","运动户外","图书","玩具乐器","钟表","居家生活","珠宝饰品","音像制品","家具建材","计生情趣","营养保健","奢侈礼品","生活服务","旅游出行"}; 
private ScrollView mScrollView; 
private FrameLayout mFrameLayout; 
//装装ScrollView的item的TextView的数组 
private TextView[] textViewArray; 
//装ScrollView的item的数组 
private View[] views; 
Context context; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.activity_main); 
context=this; 
textViewArray=new TextView[titles.length]; 
views=new View[titles.length]; 
initView(); 
getSupportFragmentManager().beginTransaction().replace(R.id.framelayout,new FragmentOne()).commit(); 
} 
private void initView() { 
mScrollView= (ScrollView) findViewById(R.id.scrollview); 
addView(); 
changeTextColor(0); 
mFrameLayout= (FrameLayout) findViewById(R.id.framelayout); 
} 
/** 
* 给ScrollView添加子View 
*/ 
private void addView() { 
LinearLayout mLinearLayout= (LinearLayout) findViewById(R.id.linearlayout); 
View view; 
for(int x=0;x<titles.length;x++){ 
view = View.inflate(this, R.layout.item_scrollview, null); 
view.setId(x); 
view.setOnClickListener(this); 
TextView tv= (TextView) view.findViewById(R.id.textview); 
tv.setText(titles[x]); 
mLinearLayout.addView(view); 
textViewArray[x]=tv; 
views[x]=view; 
} 
} 
@Override 
public void onClick(View v) { 
ToastUtils.showToast(this,titles[(int) v.getId()]); 
changeTextColor((int) v.getId()); 
changeTextLocation((int) v.getId()); 
Fragment fragment=null; 
switch (v.getId()){ 
case 0: 
fragment=new FragmentOne(); 
break; 
case 1: 
fragment=new Fragment1(); 
break; 
case 2: 
fragment=new Fragment2(); 
break; 
case 3: 
fragment=new Fragment3(); 
break; 
case 4: 
fragment=new Fragment4(); 
break; 
case 5: 
fragment=new Fragment5(); 
break; 
case 6: 
fragment=new Fragment6(); 
break; 
case 7: 
fragment=new Fragment7(); 
break; 
} 
if(fragment!=null){ 
getSupportFragmentManager().beginTransaction().replace(R.id.framelayout,fragment).commit(); 
} 
} 
/** 
* 改变textView的颜色 
* @param id 
*/ 
private void changeTextColor(int id) { 
for (int i = 0; i < textViewArray.length; i++) { 
if(i!=id){ 
textViewArray[i].setBackgroundResource(android.R.color.transparent); 
textViewArray[i].setTextColor(0xff000000); 
}else { 
textViewArray[id].setBackgroundResource(android.R.color.white); 
textViewArray[id].setTextColor(0xffff5d5e); 
} 
} 
} 
/** 
* 改变栏目位置 
*/ 
private void changeTextLocation(int index) { 
//views[clickPosition].getTop()针对其父视图的顶部相对位置 
int x = (views[index].getTop() - mScrollView.getHeight() / 2); 
mScrollView.smoothScrollTo(0, x); 
} 
}