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);   }  }