ListView控件 数据加载

这个太常用了 做下记录。

　　ListView可以简单的呈现大数据的浏览，加载图片，文字。。等等

　　网络也有很多Demo，我就不多说了

首先给个ListView控件：listview_widget.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/listview_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <!-- 列表控件 -->
    <ListView
        android:id="@+id/MainListView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</LinearLayout>

给每个Item添加”样式“  listview_item_layout.xml

<?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="horizontal" >

    <!-- 列表Item -->
    <ImageView
        android:id="@+id/list_image"
          android:layout_width="80dp"
        android:layout_height="80dp"
        android:contentDescription="@string/app_name"
        android:paddingLeft="10dp"
        android:paddingRight="10dp"
        android:tag="@string/goodsinfo_img_name"
        android:src="@drawable/ic_launcher" />
    
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical" >

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">

            <TextView
                android:id="@+id/list_text_1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/goodsinfo_name" />

            <TextView
                android:id="@+id/list_text_2"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:gravity="right"
                android:text="@string/goodsinfo_price" />

       </LinearLayout>

        <TextView
            android:id="@+id/list_text_3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/goodsinfo_info" />
       
    </LinearLayout>

</LinearLayout>

布局界面就这样。

代码实现:

首先给listView一个适配器，加载数据用：

/**
 * @author admin
 * ListView 适配器
 */
public class MyListAdapter extends BaseAdapter {
    private static String TAG = "MyListAdapter";
    private Activity mActivity;
    private List<GoodsInfo> goodsList;
    private ViewHolder holder = null;
    private GoodsInfo _info = null;
    private View itemView = null;
    public MyListAdapter(Activity context, List<GoodsInfo> list) {
        // TODO Auto-generated constructor stub
        this.mActivity = context;
        this.goodsList = list;
    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return goodsList.size();

    }

    @Override
    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return goodsList.get(position);

    }

    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub

            holder = new ViewHolder();
            LayoutInflater inflater = mActivity.getLayoutInflater();
            itemView = inflater.inflate(R.layout.listview_item_layout, null);
            _info = goodsList.get(position);
            holder.goodsName  = (TextView) itemView.findViewById(R.id.list_text_1);
            holder.goodsPrice = (TextView) itemView.findViewById(R.id.list_text_2);
            holder.goodsInfo  = (TextView) itemView.findViewById(R.id.list_text_3);
            holder.goodsImg   = (ImageView) itemView.findViewById(R.id.list_image);
            itemView.setTag(holder);

        holder.goodsName.setText(_info.getGoodsName());
        String _price=Float.toString(_info.getGoodsPrice());
        holder.goodsPrice.setText(_price);
        holder.goodsInfo .setText(_info.getGoodsInfos());
        //imageView.setImageDrawable();
        holder.goodsImg.setImageResource(_info.getGoodsImage());
        
        return itemView;

    }
    
    public final class ViewHolder{
        public ImageView goodsImg = null;
        public TextView  goodsName = null;
        public TextView  goodsInfo = null;
        public TextView  goodsPrice = null;
    }

}

 

然后找到View（这里用的是动态布局），设置适配器，添加Item点击事件结束。

（GoodsInfo 类就不给出）

此代码参考网络各个文章，自己做记录，如有雷同，说明看过你的牛文，再次感谢！