android 使用HorizontalScrollView 实现标题带动内容左右切屏

<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="match_parent" 
    tools:context=".MainActivity" >

    <HorizontalScrollView
        android:id="@+id/horizontalScrollView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"   >
 
    </HorizontalScrollView>
 
</RelativeLayout>

public class MainActivity extends Activity {
    private HorizontalScrollView hsv ;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        hsv = (HorizontalScrollView) findViewById(R.id.horizontalScrollView1);
        initView();
    }
 
    public void initView() {
        String[] mtexts = {
                "焦点", "国内", "国外", "军事", 
                "焦点", "国内", "国外", "军事", "更多"
        }; 
        final LinearLayout layout = new LinearLayout(this);
      
　　　//添加子View
　　　　　　　for (int i = 0; i < mtexts.length; i++) {
            Button btn = new Button(this);
            btn.setId(i);
            btn.setText(mtexts[i]);
            layout.addView(btn);
        }
        hsv.addView(layout);
    }
}