BaseAdapter实现不存储列表选项的 ListView

package com.crazyit.ui.adapterview;

import android.graphics.Color;
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.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;

/**
 * 扩展BaseAdapter实现不存储列表选项的 ListView
 */
public class BaseAdapterActivity extends AppCompatActivity {
ListView myList;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_base_adapter);

        //初始化控件
        myList = (ListView) findViewById(R.id.mylist);

        BaseAdapter mAdapter = new BaseAdapter() {
            @Override
            public int getCount() {
                //获取 Item 的总数
                return 30; //返回 指定包含30个列表选项
            }

            @Override
            //得到 Item条目代表的对象
            public Object getItem(int position) {
                return null;  //返回ListView Item条目代表的对象
            }

            @Override
            //得到 Item的 id
            public long getItemId(int position) {
                return position;
            }

            @Override
            //得到 Item的视图
            public View getView(int position, View convertView, ViewGroup parent) {
                //创建一个线性布局 并添加两个组件
                LinearLayout layout = new LinearLayout(getApplication());
                layout.setOrientation(LinearLayout.HORIZONTAL);  //设置方向

                //设置一个 ImageView
                ImageView image = new ImageView(getApplication());
                image.setImageResource(R.drawable.qingzhao);

                //设置一个 textView
                TextView textView = new TextView(getApplication());
                textView.setText("第 "+(position+1)+" 个列表项");
                textView.setTextSize(20);
                textView.setTextColor(Color.RED);
                //添加到 LinearLayout布局中
                layout.addView(image);
                layout.addView(textView);

                //返回 LinearLayout对象
                return layout;
            }
        };


        myList.setAdapter(mAdapter);
    }
}

布局文件

<?xml version="1.0" encoding="utf-8"?>
<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"
    tools:context="com.crazyit.ui.adapterview.BaseAdapterActivity">
<ListView
    android:id="@+id/mylist"
    android:layout_width="match_parent"
    android:layout_height="match_parent"></ListView>
</LinearLayout>