ScrollView 嵌套listview 正常显示

//自定义listview

package com.ce.scrollview_listview;

import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.ListView;

public class MyListView extends ListView {
   int mLastMotionY;
   boolean bottomFlag;

   public MyListView(Context context) {
       super(context);
       // TODO Auto-generated constructor stub
   }

   public MyListView(Context context, AttributeSet attrs) {
       super(context, attrs);
       // TODO Auto-generated constructor stub
   }

   public MyListView(Context context, AttributeSet attrs, int defStyle) {
       super(context, attrs, defStyle);
       // TODO Auto-generated constructor stub
   }

   @Override
   public boolean onInterceptTouchEvent(MotionEvent ev) {
       // TODO Auto-generated method stub
       // 闂冪粯顒涢悥鍓佽�閹凤附鍩呮禍瀣╂�
       if (bottomFlag) {
           getParent().requestDisallowInterceptTouchEvent(true);
       }
       return super.onInterceptTouchEvent(ev);
   }

   @Override
   public boolean onTouchEvent(MotionEvent ev) {
       // TODO Auto-generated method stub
       int y = (int) ev.getRawY();
       switch (ev.getAction()) {
       case MotionEvent.ACTION_DOWN:
           // 妫ｆ牕鍘涢幏锔藉焻down娴滃�娆?,鐠佹澘缍峺閸ф劖鐖?
           mLastMotionY = y;
           break;
       case MotionEvent.ACTION_MOVE:
           // deltaY > 0 閺勵垰鎮滄稉瀣�箥閸旓拷,< 0閺勵垰鎮滄稉濠呯箥閸旓拷
           int deltaY = y - mLastMotionY;
           if (deltaY < 0) {
               bottomFlag = true;
               getParent().requestDisallowInterceptTouchEvent(true);
           }
           break;
       case MotionEvent.ACTION_UP:
       case MotionEvent.ACTION_CANCEL:
           break;
       }
       return super.onTouchEvent(ev);
   }

}

//MainActivity

package com.ce.scrollview_listview;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;

public class MainActivity extends Activity {
   // 制造数据
   String[] strs = { "item 1", "item 2", "item 3", "item 4", "item 5",
           "item 6", "item 7", "item 8", "item 9", "item 10", "item 11",
           "item 12", "item 13", "item 14", "item 15" };
   private ListView listview;

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

       listview = (ListView) findViewById(R.id.listView1);
       listview.setAdapter(new ArrayAdapter<String>(MainActivity.this,
               android.R.layout.simple_list_item_1, strs));
       setListViewHeightBasedOnChildren(listview);
   }

   @Override
   public void onWindowFocusChanged(boolean hasFocus) {
       // TODO Auto-generated method stub
       super.onWindowFocusChanged(hasFocus);

   }

   private void setListViewHeightBasedOnChildren(ListView listView) {
       ListAdapter listAdapter = listView.getAdapter();
       if (listAdapter == null) {
           return;
       }

       int totalHeight = 0;
       for (int i = 0, len = listAdapter.getCount(); i < len; i++) {
           // listAdapter.getCount()返回数据项的数目
           View listItem = listAdapter.getView(i, null, listView);
           // 计算子项View 的宽高
           listItem.measure(0, 0);
           // 统计所有子项的总高度
           totalHeight += listItem.getMeasuredHeight();
       }

       ViewGroup.LayoutParams params = listView.getLayoutParams();
       // params.height = totalHeight
       // + (listView.getDividerHeight() * (listAdapter.getCount() - 1));

       params.height = 400;
       // listView.getDividerHeight()获取子项间分隔符占用的高度
       // params.height最后得到整个ListView完整显示需要的高度
       listView.setLayoutParams(params);
   }
}

//mian.xml