viewpager为listview的header

今天在项目，需要将viewpager作为header加入到listview里，但是一直显示不出来，或者报异常，其实，关键点有3点：

1.需要在代码中设置控件的高与宽

2.设置viewpager的时候，绝对不能用WRAP_CONTENT，需要直接指定大小

3.设置长宽是，需要指定他的subclass，如setLayoutParams(new ListView.LayoutParams(ListView.LayoutParams.FILL_PARENT, 100));

总之关键代码就是viewPager.setLayoutParams(new ListView.LayoutParams(ListView.LayoutParams.FILL_PARENT, 100)); 设置长宽，不用WRAP_CONTENT，LayoutParams之前要指明父类是Listview

 public class MainActivity extends Activity {
     private ListView list;
     private static final int[] pics = { R.drawable.img0,
         R.drawable.img1, R.drawable.img2};
     final String[] mStrings = {"0","1","2","3","4","5","6"};
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
         list = (ListView)findViewById(R.id.lstview);
         Button b = new Button(this);
         b.setText("aaa");
         list.addHeaderView(getListHeaderView(),null,false);
         list.addFooterView(b);
         list.setAdapter(new ArrayAdapter<String>(this,
                 android.R.layout.simple_list_item_1, mStrings));

     }

     private View getListHeaderView(){
          LinearLayout.LayoutParams mParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
                     LinearLayout.LayoutParams.WRAP_CONTENT);
         ViewPager viewPager = null;
         View view = getLayoutInflater().inflate(R.layout.news_lstview_header, null);
         viewPager = (ViewPager)view.findViewById(R.id.news_layout_viewPager);
         viewPager.setLayoutParams(new ListView.LayoutParams(ListView.LayoutParams.FILL_PARENT, 100)); //这里的高绝对不能是WRAP_CONTENT
         List<View> list = new ArrayList<View>();
         for(int i=0;i<3;i++){
             ImageView imgView = new ImageView(this);
             imgView.setLayoutParams(mParams);
             imgView.setImageResource(pics[i]);
             list.add(imgView);
         }
         viewPager.setAdapter(new MyPagerAdapter(list));
         viewPager.setCurrentItem(0);
         return viewPager;
     }

 }