ScrollView嵌套ListView

<ScrollView 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" >

<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<com.example.test_scrollview.MyListView
android:id="@+id/lv_list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>

<TextView
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="#fbfbfb"
android:gravity="center_vertical"
android:text="我是占位的"
/>
<TextView
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="#fbfbfb"
android:gravity="center_vertical"
android:text="我是占位的"
/>
</LinearLayout>

</ScrollView>

package com.example.test_scrollview;

import java.util.ArrayList;

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

public class MainActivity extends Activity {

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

ListView lv_list=(ListView) findViewById(R.id.lv_list);

ArrayList<String> list=new ArrayList<String>();
for (int i = 0; i < 50; i++) {
list.add("张三"+i);
}

//设置适配器
lv_list.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, list));

//计算listview的高度
setListViewHeightBasedOnChildren(lv_list);

//当条目滑到到最后一条的时候，scrollview自动滑动
lv_list.setOnScrollListener(new OnScrollListener() {

@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {

}

@Override
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {
if(list.size()-1==view.getLastVisiblePosition()){
lv_list.getParent().requestDisallowInterceptTouchEvent(false);
}else{
lv_list.getParent().requestDisallowInterceptTouchEvent(true);
}

}
});
}

/**
* 计算listview的高度
*/
@SuppressWarnings("deprecation")
private void setListViewHeightBasedOnChildren(ListView lv_list) {

int totalHeight=0;
//得到适配器
@SuppressWarnings("rawtypes")
ArrayAdapter listAdapter = (ArrayAdapter) lv_list.getAdapter();
if (listAdapter == null) {
return;
}
//遍历listAdapter 计算出条目的总高度
for (int i = 0; i < listAdapter.getCount(); i++) {

//得到每个条目

View listItem = listAdapter.getView(i, null, lv_list);
if(listItem!=null)
{
listItem.setLayoutParams(new LayoutParams(
LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
listItem.measure(MeasureSpec.UNSPECIFIED,
MeasureSpec.UNSPECIFIED); //无束缚测量
//累加每个条目的高度
totalHeight+=listItem.getMeasuredHeight();
}
}

ViewGroup.LayoutParams params = lv_list.getLayoutParams();

//listview的总高度=条目高度+分割线高度+上下边距高度
params.height=totalHeight+(lv_list.getDividerHeight()*(listAdapter.getCount()-1))+lv_list.getPaddingTop()+lv_list.getPaddingBottom();

//得到屏幕的总高度
int height = getWindowManager().getDefaultDisplay().getHeight();

//判断如果listview的高度大于屏幕的一半，就显示屏幕的一半
if(params.height>height/2)
{
params.height=height/2+200;
}

lv_list.setLayoutParams(params);
}

}

package com.example.test_scrollview;

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

public class MyListView extends ListView {

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

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

public MyListView(Context context) {
super(context);

}
/**
*分发
*/
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {

//请求父Scrollview不截断touch事件，因为Scrollview也有滚动效果）
getParent().requestDisallowInterceptTouchEvent(true);

System.out.println(getParent()+"---------------");
return super.dispatchTouchEvent(ev);
}
/**
*处理事件
*/
@Override
public boolean onTouchEvent(MotionEvent ev) {
// TODO Auto-generated method stub
return super.onTouchEvent(ev);
}
/**
*拦截事件
*/
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
// TODO Auto-generated method stub
return super.onInterceptTouchEvent(ev);
}

}