android - ListView 问题 - 如何将图像从 drawable 放入 listView

Question

我正在使用网络服务获取我需要的地方的数据。在 listView 中，我需要显示图像、地点名称、地点类型的图像和地址。我正在使用简单适配器。我知道如何填充文本，但不知道如何从可绘制文件夹中放置图像。第一张图片将按某种顺序排列(例如图片 A，第二张图片 B，第三张图片 C)，第二张图片将取决于地点的类型(如果该地点是面包店，那么图片将是面包)等等。我转发到 HashMaps 的 SimpleAdapter ArrayList...任何人都可以给我一些想法或一些代码吗？？？

Answer 1

我想这个例子会对你有所帮助。

//主类

import android.app.Activity;
import android.os.Bundle;

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.ListView;
import android.widget.TextView;

public class Alertslistview extends Activity 
{

private static class EfficientAdapter extends BaseAdapter 
{
    private LayoutInflater mInflater;

    public EfficientAdapter(Context context) 
    {
    mInflater = LayoutInflater.from(context);
    }

    public int getCount() 
    {
    return alerts.length;
    }

    public Object getItem(int position)
    {
    return position;
    }

    public long getItemId(int position) 
    {
    return position;
    }

    public View getView(int position, View convertView, ViewGroup parent) 
    {
    ViewHolder holder;
    if (convertView == null) 
    {
        convertView = mInflater.inflate(R.layout.alertslist, null);
        holder = new ViewHolder();
        holder.img =(ImageView) convertView.findViewById(R.id.img);
        holder.text2 = (TextView) convertView.findViewById(R.id.TextView02);

        convertView.setTag(holder);
    } 
    else 
    {
        holder = (ViewHolder) convertView.getTag();
    }

        holder.img.setImageResource(imgid[position]);
        holder.text2.setText(alerts[position]);

        return convertView;
    }

    static class ViewHolder
    {
        ImageView img;
        TextView text2;
    }}
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    ListView l1 = (ListView) findViewById(R.id.ListView01);
    l1.setAdapter(new EfficientAdapter(this));      }

private static final String[] alerts= {"Service Request EBH123H has been reassigned to Mohammed","Appointment Request for May 29th declined","New Survey - Metro Rail Survey available on your device"};

static final Integer[] imgid = {R.drawable.alert,R.drawable.alert,R.drawable.alert};
}