动态设置ListView的高度

“`

package com.android.customlistviewheight;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.LayoutInflater;

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 listView;
List<String> list = new ArrayList<>();

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = ((ListView) findViewById(R.id.listview));
getList();
MyAdapter myAdapter = new MyAdapter();
listView.setAdapter(myAdapter);
setListViewHeight(listView);

}

private void getList() {
list.clear();
for (int i = 0; i < 20; i++) {
list.add("数据；；" + i);
}
}

public void setListViewHeight(ListView listView) {
ListAdapter adapter = listView.getAdapter();
if (adapter == null) {
return;
}
int totalHeight = 0;
for (int i = 0; i < 8; i++) {
View listViewItem = adapter.getView(i, null, listView);
listViewItem.measure(0, 0);
totalHeight += listViewItem.getMeasuredHeight();
}
ViewGroup.LayoutParams layoutParams = listView.getLayoutParams();
layoutParams.height = totalHeight + (listView.getDividerHeight()) * (adapter.getCount() - 1);
listView.setLayoutParams(layoutParams);//设置listView高度
}

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 = null;
if (convertView == null) {
holder = new ViewHolder();
convertView = LayoutInflater.from(MainActivity.this).inflate(R.layout.item, parent, false);
holder.tv = (TextView) convertView.findViewById(R.id.tv);

convertView.setTag(holder);
}

holder = (ViewHolder) convertView.getTag();
holder.tv.setText(list.get(position));
return convertView;
}
}

static class ViewHolder {
TextView tv;
}

}

主要功能代码在 setListViewHeight()方法中 注意：在setAdapter之后调用方法