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>