1. MainActivity.java

public class MainActivity extends Activity {

//声明UI组件和资源变量等

private ListView lv2;

private MyListViewAdapter listViewAdapter;;

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

//基于BaseAdapter

//setContentView(R.layout.gallery);

//setGalleryView();

//基于ListView、GridView及Spinner和BaseAdapter实现

setContentView(R.layout.main);

setLGSView();

}

private void setLGSView() {

lv2 = (ListView)findViewById(R.id.listview2);

listViewAdapter = new MyListViewAdapter(this);

lv2.setAdapter(listViewAdapter);

}

2. MyListViewAdapter.java

package home.lee.listviewadapterdemo;

import android.content.Context;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.ImageView;

import android.widget.TextView;

public class MyListViewAdapter extends BaseAdapter {

private Context context;//为myInflater而采用context

private LayoutInflater myInflater;

public MyListViewAdapter(Context context) {

super();

this.context = context;

}

@Override

public int getCount() {//用来说明需要绘制的条目数

return 8;//数组的长度，即个数，可以根据实际调整

}

@Override

public Object getItem(int position) {

return position;

}

@Override

public long getItemId(int position) {

return position;

}

@Override

public View getView(int position, View convertView, ViewGroup parent) {//用来说明需要绘制的条目数个条目就调用一次这个方法

ViewHolder holder = new ViewHolder();

if (convertView == null)

{

/**

* 这个方法getView()，是用来逐一绘制每一条item

*

* setTag()会把View与ViewHolder绑定，形成一一对应的关系，拖动listview的时候会重新绘制每一条item

* 但是那些已经取得绑定的View，会调用getTag()方法，就不会重新绘制，而是拿到内存中已经取得的资源，提高了效率

*

* @param position position就是位置从0开始

* @param convertView convertView是Spinner,ListView中每一项要显示的view

* @param parent parent就是父窗体了，也就是Spinner,ListView,GridView了

* @return 通常return 的view也就是convertView

*

* 在程序中动态加载以上布局:

* LayoutInflater flater = LayoutInflater.from(this);

* View view = flater.inflate(R.layout.example, null);

*/

myInflater = LayoutInflater.from(context);

convertView = myInflater.inflate(R.layout.item_list, null);

holder.icon = (ImageView)convertView.findViewById(R.id.itemimageview2);

holder.text = (TextView)convertView.findViewById(R.id.itemtextview2);

convertView.setTag(holder);

}

else

{

holder = (ViewHolder) convertView.getTag();

}

if (position <= 1)

{

holder.icon.setImageResource(android.R.drawable.btn_dropdown);

holder.text.setText("你好");

}

else if (position <= 3 && position >= 2)

{

holder.icon.setImageResource(android.R.drawable.edit_text);

holder.text.setText("Hello");

}

else

{

holder.icon.setImageResource(android.R.drawable.spinner_dropdown_background);

holder.text.setText("안녕하세요");

}

return convertView;

}

private class ViewHolder

{

TextView text;

ImageView icon;

}

}

 

3. main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:id="@+id/linearlayout2"

android:orientation="vertical" >

<TextView

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="ListView" />

<ListView

android:id="@+id/listview2"

android:layout_width="fill_parent"

android:layout_height="wrap_content">

</ListView>

</LinearLayout>

4. item_list.xml

 

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:orientation="horizontal" >

<TextView

android:id="@+id/itemtextview2"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text=""

android:layout_weight="1"/>

<ImageView

android:id="@+id/itemimageview2"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:contentDescription="@string/app_name"

android:src="@drawable/ic_launcher"

android:layout_weight="10"/>

</LinearLayout>

运行结果：

其改进应用可参考：