Android自定义adapter的listview

在开发中，我们经常使用到ListView这个控件，但ListView自带适配SimpleAdapter，SimpleCursorAdapter等扩展性比较差（如Button，imageView等），严重制约我们的开发。不过Android也提供自定义的适配器adapter给我扩展这些控件，下面做个简单例子（listview里面含有textview，imageview，button）

1.定义一个数据类，不用数据集，也是为扩展

public class Data {<span style="white-space:pre"></span>private int img_id;//图片id<span style="white-space:pre"></span>private String name;//名字<span style="white-space:pre"></span><span style="white-space:pre"></span>public Data(int img_id, String name) {<span style="white-space:pre"></span>super();<span style="white-space:pre"></span>this.img_id = img_id;<span style="white-space:pre"></span>this.name = name;<span style="white-space:pre"></span>}<span style="white-space:pre"></span>public int getImg_id() {<span style="white-space:pre"></span>return img_id;<span style="white-space:pre"></span>}<span style="white-space:pre"></span>public void setImg_id(int img_id) {<span style="white-space:pre"></span>this.img_id = img_id;<span style="white-space:pre"></span>}<span style="white-space:pre"></span>public String getName() {<span style="white-space:pre"></span>return name;<span style="white-space:pre"></span>}<span style="white-space:pre"></span>public void setName(String name) {<span style="white-space:pre"></span>this.name = name;<span style="white-space:pre"></span>}<span style="white-space:pre"></span><span style="white-space:pre"></span>}

2.每个列需显示的内容

<?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"    android:background="#000000" >    <LinearLayout         android:gravity="center"<span style="white-space:pre"></span>android:layout_width="wrap_content"    android:layout_height="wrap_content" >      <ImageView android:layout_width="50dp"    android:layout_height="50dp"    android:id="@+id/img"    android:src="@drawable/ic_launcher"        />          <TextView            android:id="@+id/name"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:textColor="#ffffff" />        </LinearLayout><Button     android:layout_alignParentRight="true"android:layout_width="wrap_content"android:layout_height="wrap_content"android:id="@+id/bt"android:text="@string/comfirm"    /></RelativeLayout>

3.自定义适配器adapter

public class Adapter extends BaseAdapter{private Context context;private int itemLayoutID;private int[] itemIds;    <span style="white-space:pre"></span>private List<Data> dataList;    <span style="white-space:pre"></span>public Adapter(Context context, int itemLayoutID,int[] itemIds, List<Data> dataList ) {        <span style="white-space:pre"></span>this.context = context;this.itemLayoutID = itemLayoutID;this.itemIds = itemIds;this.dataList = dataList;   <span style="white-space:pre"></span> }    @Overridepublic int getCount() {// TODO Auto-generated method stubreturn dataList.size();}@Overridepublic Object getItem(int arg0) {// TODO Auto-generated method stubreturn dataList.get(arg0);}@Overridepublic long getItemId(int arg0) {// TODO Auto-generated method stubreturn 0;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {// TODO Auto-generated method stubViewHolder holder;if (convertView == null) {//定义每行的布局LayoutInflater layoutInflater = LayoutInflater.from(context);convertView = layoutInflater.inflate(itemLayoutID, null);holder = new ViewHolder();holder.name = (TextView) convertView.findViewById(itemIds[1]);holder.image = (ImageView) convertView.findViewById(itemIds[0]);holder.bt = (Button) convertView.findViewById(itemIds[2]);convertView.setTag(holder);} else {holder = (ViewHolder) convertView.getTag();}//根据listview的位置获取数据final String name = dataList.get(position).getName();holder.name.setText(name);holder.image.setImageResource(dataList.get(position).getImg_id());holder.bt.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubnew AlertDialog.Builder(context).setTitle("系统提示")//设置对话框标题         .setMessage(name)//设置显示的内容         .setPositiveButton("确定",new DialogInterface.OnClickListener() {//添加确定按钮                         @Override             public void onClick(DialogInterface dialog, int which) {//确定按钮的响应事件                 // TODO Auto-generated method stub               }         }).show();//在按键响应事件中显示此对话框  }});return convertView;}static class ViewHolder {public TextView name;public ImageView image;public Button bt;}

4.在activity上给listview加载数据

<RelativeLayout 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:background="#000000"     ><ListView     android:id="@+id/lv"android:layout_width="match_parent"    android:layout_height="match_parent">    </ListView></RelativeLayout>

public class MainActivity extends Activity {private List<Data> dataList;private int[] img_id = {R.drawable.coffee1,R.drawable.coffee2,R.drawable.coffee3,R.drawable.coffee4,R.drawable.coffee5};@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);//初始化数据dataList = new ArrayList<Data>();for(int i=0;i<img_id.length;i++){int img = img_id[i];String name = this.getResources().getString(R.string.coffee) + i;Data data = new Data(img, name);dataList.add(data);}        // 创建一个自定义Adapter        Adapter adapter = new Adapter(MainActivity.this,R.layout.list_item,          new int[]{R.id.img, R.id.name, R.id.bt}, dataList);        ListView list = (ListView) findViewById(R.id.lv);        // 为ListView设置Adapter        list.setAdapter(adapter);}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}}

5.最后实现的效果和点击button的效果

自定义adapter已经完成，这也是adapter的一个模板，具体代码http://download.csdn.net/detail/qq_29955091/9553940