一起学android之BaseAdapter使用(14)
发表时间:2020-10-19
发布人:葵宇科技
浏览次数:68
扩大BaseAdapter可以对各列表项进行最大年夜限度的定制,具体描述请看以下代码:
baseadapter_list构造文件:
<span style="font-size:18px;"><?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ListView
android:id="@+id/lv_baseadapter"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
</ListView>
</LinearLayout></span>baseadapter构造文件:
<span style="font-size:18px;"><?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" >
<LinearLayout
android:id="@+id/ll_top"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:orientation="horizontal">
<ImageView
android:id="@+id/iv_image"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:scaleType="fitXY"
android:src=http://www.sjsjw.com/100/000275MYM020387/"@drawable/a5i"
android:layout_gravity="center"/>
BaseAdapterTest主文件:
<span style="font-size:18px;">public class BaseAdapterTest extends Activity {
int[] images = new int[] { R.drawable.a5i, R.drawable.a5j, R.drawable.a5k };
String[] titles = new String[] { "德律风", "QQ", "接洽人" };
String[] des = new String[] { "当前无德律风记录", "当前无QQ聊天记录", "比来无接洽人" };
private ListView lv_baseadapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.baseadapter_list);
initView();
setDate();
}
private void initView(){
//注册控件
lv_baseadapter=(ListView)findViewById(R.id.lv_baseadapter);
//注册单击事宜
lv_baseadapter.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Toast.makeText(BaseAdapterTest.this, "点击了第"+position+"项", Toast.LENGTH_SHORT).show();
}
});
}
private void setDate(){
//绑定适配器
lv_baseadapter.setAdapter(baseAdapter);
}
BaseAdapter baseAdapter=new BaseAdapter() {
/*
*返回第postion处的列表项组件
* @see android.widget.Adapter#getView(int, android.view.View, android.view.ViewGroup)
*/
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder=new ViewHolder();
if(null==convertView){
LayoutInflater layoutInflater=LayoutInflater.from(BaseAdapterTest.this);
convertView=layoutInflater.inflate(R.layout.baseadapter, null);
viewHolder.iv_image=(ImageView)convertView.findViewById(R.id.iv_image);
viewHolder.tv_title=(TextView)convertView.findViewById(R.id.tv_title);
viewHolder.tv_desc=(TextView)convertView.findViewById(R.id.tv_des);
/*
* 将当前的View和ViewHolder绑定
*/
convertView.setTag(viewHolder);
}else{
/*
* 为已经取得绑定的View调用getTag()办法,当前的view就不必从新绘制,
* 削减内存资本。
*/
viewHolder=(ViewHolder)convertView.getTag();
}
viewHolder.iv_image.setImageResource(images[position]);
viewHolder.tv_title.setText(titles[position]);
viewHolder.tv_desc.setText(des[position]);
return convertView;
}
/*
* 返回第postion处的列表项的ID
* @see android.widget.Adapter#getItemId(int)
*/
@Override
public long getItemId(int position) {
return position;
}
/*
* 返回第postion处的列表项的内容。该办法在事宜监听时会调用
* @see android.widget.Adapter#getItem(int)
*/
@Override
public Object getItem(int position) {
return position;
}
/*
* 返回该Adapter将会包含若干个列表项
* @see android.widget.Adapter#getCount()
*/
@Override
public int getCount() {
return titles.length;
}
};
private class ViewHolder{
ImageView iv_image;
TextView tv_title;
TextView tv_desc;
}
}</span>[img]http://img.blog.csdn.net/20150104210322832?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvaGFpX3FpbmdfeHVfa29uZw==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
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