ScrollView中嵌套ListView

第一种方法：

在计算listview总高度并设置

使用该方法需要注意：子ListView的每个Item必须是LinearLayout，不能是其他的，因为其他的Layout(如RelativeLayout)没有重写onMeasure()，所以会在onMeasure()时抛出异常。

ScrollView下只能有一个字布局

<LinearLayout 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"
    android:orientation="vertical" >

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent" >

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content" >

            <ListView
                android:id="@+id/listview"
                android:layout_width="match_parent"
                android:layout_height="wrap_content" >
            </ListView>
        </LinearLayout>
    </ScrollView>

</LinearLayout>

item布局

子ListView的每个Item必须是LinearLayout，不能是其他的，因为其他的Layout(如RelativeLayout)没有重写onMeasure()，所以会在onMeasure()时抛出异常。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    
<TextView
    android:id="@+id/text"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    ></TextView>
</LinearLayout>

MainActivity.java（红色为方法）

package com.bawei.day06_scrollview;

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

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.BaseAdapter;
import android.widget.ListView;

public class MainActivity extends Activity {

    private ListView listView;
    private List<String> list;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    listView = (ListView) findViewById(R.id.listview);
    list = new ArrayList<String>();    
    for (int i = 0; i < 200; i++) {
        list.add(i+"");
    }    
    BaseAdapter adapter=new Adper(MainActivity.this,list);
    
    listView.setAdapter(adapter);
    
    
    
    }
    //界面加载完
  @Override
public void onWindowFocusChanged(boolean hasFocus) {
    // TODO Auto-generated method stub
    super.onWindowFocusChanged(hasFocus);
    setListViewHeightBasedOnChildren(listView);
}
  public void setListViewHeightBasedOnChildren(ListView listView) {
      //BaseAdapter为listview布局
      BaseAdapter listAdapter = (BaseAdapter) listView.getAdapter(); 
      if (listAdapter == null) {
          return;
      }       
      int totalHeight = 0;
      for (int i = 0; i < listAdapter.getCount(); i++) {
          View listItem = listAdapter.getView(i, null, listView);
          if(listItem != null){
              listItem.setLayoutParams(new LayoutParams(
                      LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
              listItem.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);
              totalHeight += listItem.getMeasuredHeight();
          }
      }
      ViewGroup.LayoutParams params = listView.getLayoutParams();
      params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1)) 
              + listView.getPaddingTop() + listView.getPaddingBottom();
      listView.setLayoutParams(params);
  }    

}

适配器

package com.bawei.day06_scrollview;

import java.util.List;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

public class Adper extends BaseAdapter {
    Context context;
    List<String> list;
    public Adper(Context context, List<String> list) {
        // TODO Auto-generated constructor stub
    this.context=context;
    this.list=list;
    }

    public int getCount() {
        // TODO Auto-generated method stub
        return list.size();
    }

    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return null;
    }

    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return 0;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
        ViewHolder viewHolder;
        if(convertView==null){
        convertView=View.inflate(context, R.layout.listview, null);
        viewHolder=new ViewHolder();
        viewHolder.textView=(TextView) convertView.findViewById(R.id.text);
        convertView.setTag(viewHolder);
        }else{
            viewHolder=(ViewHolder) convertView.getTag();
        }
        viewHolder.textView.setText(list.get(position));
        return convertView;
    }
class ViewHolder{
    TextView textView;
}
}

第二种方法

 自定义ListView，重载onMeasure()方法，设置全部显示

<LinearLayout 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"
    android:orientation="vertical" >

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent" >

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content" >

            <com.bawei.day06.ListViewForScrollView
                android:id="@+id/listview"
                android:layout_width="match_parent"
                android:layout_height="wrap_content" >
            </com.bawei.day06.ListViewForScrollView>
        </LinearLayout>
    </ScrollView>

</LinearLayout>

MainActivity.java

package com.bawei.day06;

import java.util.ArrayList;
import java.util.List;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.ListView;

public class MainActivity extends Activity {
    private ListView listView;
    private List<String> list;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        listView = (ListView) findViewById(R.id.listview);
        list = new ArrayList<String>();    
        for (int i = 0; i < 200; i++) {
            list.add(i+"");
        }    
        ArrayAdapter<String> adapter=new ArrayAdapter<String>(this, android.R.layout.simple_expandable_list_item_1,list);
        
        listView.setAdapter(adapter);
    }

    
}

重写listview

ListViewForScrollView.java

package com.bawei.day06;

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

public class ListViewForScrollView extends ListView {

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

    @Override
    /**
     * 重写该方法，达到使ListView适应ScrollView的效果
     */
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,
                MeasureSpec.AT_MOST);
        super.onMeasure(widthMeasureSpec, expandSpec);
    }
}