Android HorizontalScrollView结合GridView实现类似网易新闻那样的栏目滑动效果

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dip"
android:background="@drawable/category_background" >
<Button
android:id="@+id/right"
android:layout_width="32dip"
android:layout_height="40dip"
android:layout_alignParentRight="true"
android:background="@drawable/category_array_right" />
<HorizontalScrollView
android:id="@+id/category_scrollview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginLeft="6dip"
android:layout_toLeftOf="@id/right"
android:scrollbars="none" >

<LinearLayout
android:id="@+id/category_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical" >
</LinearLayout>
</HorizontalScrollView>

</RelativeLayout>

package com.example.horizontalscrollview;

import java.util.ArrayList;
import java.util.List;

import android.os.Bundle;
import android.annotation.SuppressLint;
import android.app.ActionBar.LayoutParams;
import android.app.Activity;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.util.DisplayMetrics;
import android.view.Gravity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.Button;
import android.widget.GridView;
import android.widget.HorizontalScrollView;
import android.widget.LinearLayout;
import android.widget.SimpleAdapter;
import android.widget.TextView;

@SuppressLint("NewApi")
public class MainActivity extends Activity {
private HorizontalScrollView horizontalScrollView;
private Button right;
private List<String> array;
private TitleAdapter titleAdapter;
private int COLUMNWIDTH = 75;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

// 栏目内容存放的数组
array = new ArrayList<String>();
array.add("tab1");
array.add("tab2");
array.add("tab3");
array.add("tab4");
array.add("tab5");
array.add("tab6");
array.add("tab7");
// 最简单的一个适配器，里面就一个TextView
titleAdapter = new TitleAdapter(getApplicationContext(), array);

// 新建一个GridView
GridView category = new GridView(getApplicationContext());
// 设置内部子栏目的宽度
category.setColumnWidth(COLUMNWIDTH);
// 设置内部子栏目个数为自动适应
category.setNumColumns(GridView.AUTO_FIT);
// 设置Gravity为Center
category.setGravity(Gravity.CENTER);
// 设置Selector为透明
category.setSelector(new ColorDrawable(Color.TRANSPARENT));
int width = COLUMNWIDTH * array.size();
LayoutParams layoutParams = new LayoutParams(width,
LayoutParams.WRAP_CONTENT);
// 设置GridView的LayoutParams为子栏目的宽度乘以栏目个数
category.setLayoutParams(layoutParams);
// 设置适配器
category.setAdapter(titleAdapter);

LinearLayout categoryLayout = (LinearLayout) findViewById(R.id.category_layout);
// 将新建的GridView添加到布局中
categoryLayout.addView(category);

// 设置GridView的点击事件
category.setOnItemClickListener(new OnItemClickListener() {

@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
System.out.println("选中了" + arg2);
TextView categoryTitle;
// 每次都循环的将子栏目的颜色和背景还原
for (int i = 0; i < arg0.getCount(); i++) {
categoryTitle = (TextView) arg0.getChildAt(i);
categoryTitle.setTextColor(0XFFADB2AD);
categoryTitle.setBackgroundDrawable(null);
}
// 设置点击的栏目的文字颜色和背景图片
categoryTitle = (TextView) arg1;
categoryTitle.setTextColor(0XFFFFFFFF);
categoryTitle
.setBackgroundResource(R.drawable.categorybar_item_background);

}
});

horizontalScrollView = (HorizontalScrollView) findViewById(R.id.category_scrollview);
right = (Button) findViewById(R.id.right);
// 点击右边的滑动按钮可以让horizontalScrollView滑动
right.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
horizontalScrollView.fling(550);
}
});
}
}