实现ScrollView中包含ListView，动态设置ListView的高度（listview不能显示全，不能正确计算item的高度）

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主要方法(此方法是用来计算item高度) 在listview 设置完适配器后调用此方法参数就是listview

/*** * 动态设置listview的高度 * @param listView */public void setListViewHeightBasedOnChildren(ListView listView) {    ListAdapter listAdapter = listView.getAdapter();    if (listAdapter == null) {        return;    }    int totalHeight = 0;    for (int i = 0; i < listAdapter.getCount(); i++) {        View listItem = listAdapter.getView(i, null, listView);        listItem.measure(0, 0);  //在还没有构建View 之前无法取得View的度宽。在此之前我们必须选                 measure 一下.        totalHeight += listItem.getMeasuredHeight();        //Log.i("xxxxxxxx listItem xxxxxxxxx", i + "  height : " + totalHeight);    }    ViewGroup.LayoutParams params = listView.getLayoutParams();    params.height = totalHeight            + (listView.getDividerHeight() * (listAdapter.getCount() - 1));    // listView.getDividerHeight()获取子项间分隔符占用的高度    listView.setLayoutParams(params);}

示例代码

布局文件

<?xml version="1.0" encoding="utf-8"?><ScrollView    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="com.example.rk_six.MainActivity">   <LinearLayout       android:layout_width="match_parent"       android:layout_height="wrap_content"       android:orientation="vertical">       <ListView           android:id="@+id/listview"           android:layout_width="match_parent"           android:layout_height="wrap_content"></ListView>   </LinearLayout></ScrollView>

item布局

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"              android:layout_width="match_parent"              android:layout_height="match_parent"   >    <TextView        android:id="@+id/textView"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentLeft="true"        android:layout_alignParentStart="true"        android:layout_alignParentTop="true"        android:layout_marginLeft="15dp"        android:layout_marginStart="15dp"        android:layout_marginTop="23dp"        android:text="TextView"/>    <TextView        android:id="@+id/textView2"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignBottom="@+id/textView"        android:layout_marginLeft="52dp"        android:layout_marginStart="52dp"        android:layout_toEndOf="@+id/textView"        android:layout_toRightOf="@+id/textView"        android:text="TextView"/></RelativeLayout>

Main方法

package com.example.rk_six;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ListAdapter;import android.widget.ListView;import android.widget.TextView;import java.util.ArrayList;import java.util.List;public class MainActivity extends AppCompatActivity {    private ListView mListView;    private List<Bean>list  = new ArrayList<>();    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mListView = (ListView) findViewById(R.id.listview);        for (int i = 0;i<100;i++){            Bean bean = new Bean();            bean.setAge("年龄"+i);            bean.setName("路人甲"+i+"号");            list.add(bean);        }      mListView.setAdapter(new MyAdapter());        setListViewHeightBasedOnChildren(mListView);    }    /***     * 动态设置listview的高度     * @param listView     */    public void setListViewHeightBasedOnChildren(ListView listView) {        ListAdapter listAdapter = listView.getAdapter();        if (listAdapter == null) {            return;        }        int totalHeight = 0;        for (int i = 0; i < listAdapter.getCount(); i++) {            View listItem = listAdapter.getView(i, null, listView);            listItem.measure(0, 0);  //在还没有构建View 之前无法取得View的度宽。在此之前我们必须选                 measure 一下.            totalHeight += listItem.getMeasuredHeight();            //Log.i("xxxxxxxx listItem xxxxxxxxx", i + "  height : " + totalHeight);        }        ViewGroup.LayoutParams params = listView.getLayoutParams();        params.height = totalHeight                + (listView.getDividerHeight() * (listAdapter.getCount() - 1));        // listView.getDividerHeight()获取子项间分隔符占用的高度        listView.setLayoutParams(params);    }    private class  MyAdapter extends BaseAdapter {        @Override        public int getCount() {            return list.size();        }        @Override        public Object getItem(int position) {            return list.get(position);        }        @Override        public long getItemId(int position) {            return position;        }        @Override        public View getView(int position, View convertView, ViewGroup parent) {            ViewHolder holder;            if (convertView==null){                convertView =View.inflate(MainActivity.this,R.layout.item,null);                holder = new ViewHolder();                holder.t1 = (TextView) convertView.findViewById(R.id.textView);                holder.t2 = (TextView) convertView.findViewById(R.id.textView2);                convertView.setTag(holder);            }else {                holder = (ViewHolder) convertView.getTag();            }            holder.t1.setText(list.get(position).getName());            holder.t2.setText(list.get(position).getAge());            return convertView;        }    }    class ViewHolder{    TextView t1,t2;    }}

Bean 类

package com.example.rk_six;/** * Created by 1 on 2017/6/13. */public class Bean {    private String name;    private String age;    public Bean() {    }    public Bean(String name, String age) {        this.name = name;        this.age = age;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public String getAge() {        return age;    }    public void setAge(String age) {        this.age = age;    }}

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