如何在Android中的ListView中显示图像列表？
如何使用ListView显示图像列表？ 我在运行时下载图像。 图像总数不固定。
我会从这样的事情开始（如果我的代码有问题，我当然会很欣赏任何评论）：
public class ItemsList extends ListActivity {
private ItemsAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.items_list);
this.adapter = new ItemsAdapter(this, R.layout.items_list_item, ItemManager.getLoadedItems());
setListAdapter(this.adapter);
}
private class ItemsAdapter extends ArrayAdapter<Item> {
private Item[] items;
public ItemsAdapter(Context context, int textViewResourceId, Item[] items) {
super(context, textViewResourceId, items);
this.items = items;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (v == null) {
LayoutInflater vi = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.items_list_item, null);
}
Item it = items[position];
if (it != null) {
ImageView iv = (ImageView) v.findViewById(R.id.list_item_image);
if (iv != null) {
iv.setImageDrawable(it.getImage());
}
}
return v;
}
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
this.adapter.getItem(position).click(this.getApplicationContext());
}
}
例如使用自己类型的Items扩展ArrayAdapter（保存关于图片的信息）并覆盖getView()方法，该方法为列表中的项目准备视图。 ArrayAdapter上还有add()方法add()项添加到列表的末尾。
R.layout.items_list是使用ListView简单布局
R.layout.items_list_item是代表列表中的一个项目的布局
package studRecords.one;
import java.util.List;
import java.util.Vector;
import android.app.Activity;
import android.app.ListActivity;
import android.content.Context;
import android.content.Intent;
import android.net.ParseException;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
public class studRecords extends ListActivity
{
static String listName = "";
static String listUsn = "";
static Integer images;
private LayoutInflater layoutx;
private Vector<RowData> listValue;
RowData rd;
static final String[] names = new String[]
{
"Name (Stud1)", "Name (Stud2)",
"Name (Stud3)","Name (Stud4)"
};
static final String[] usn = new String[]
{
"1PI08CS016","1PI08CS007","1PI08CS017","1PI08CS047"
};
private Integer[] imgid =
{
R.drawable.stud1,R.drawable.stud2,R.drawable.stud3,
R.drawable.stud4
};
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.mainlist);
layoutx = (LayoutInflater) getSystemService(
Activity.LAYOUT_INFLATER_SERVICE);
listValue = new Vector<RowData>();
for(int i=0;i<names.length;i++)
{
try
{
rd = new RowData(names[i],usn[i],i);
}
catch (ParseException e)
{
e.printStackTrace();
}
listValue.add(rd);
}
CustomAdapter adapter = new CustomAdapter(this, R.layout.list,
R.id.detail, listValue);
setListAdapter(adapter);
getListView().setTextFilterEnabled(true);
}
public void onListItemClick(ListView parent, View v, int position,long id)
{
listName = names[position];
listUsn = usn[position];
images = imgid[position];
Intent myIntent = new Intent();
Intent setClassName = myIntent.setClassName("studRecords.one","studRecords.one.nextList");
startActivity(myIntent);
}
private class RowData
{
protected String mNames;
protected String mUsn;
protected int mId;
RowData(String title,String detail,int id){
mId=id;
mNames = title;
mUsn = detail;
}
@Override
public String toString()
{
return mNames+" "+mUsn+" "+mId;
}
}
private class CustomAdapter extends ArrayAdapter<RowData>
{
public CustomAdapter(Context context, int resource,
int textViewResourceId, List<RowData> objects)
{
super(context, resource, textViewResourceId, objects);
}
@Override
public View getView(int position, View convertView, ViewGroup parent)
{
ViewHolder holder = null;
TextView title = null;
TextView detail = null;
ImageView i11=null;
RowData rowData= getItem(position);
if(null == convertView)
{
convertView = layoutx.inflate(R.layout.list, null);
holder = new ViewHolder(convertView);
convertView.setTag(holder);
}
holder = (ViewHolder) convertView.getTag();
i11=holder.getImage();
i11.setImageResource(imgid[rowData.mId]);
title = holder.gettitle();
title.setText(rowData.mNames);
detail = holder.getdetail();
detail.setText(rowData.mUsn);
return convertView;
}
private class ViewHolder
{
private View mRow;
private TextView title = null;
private TextView detail = null;
private ImageView i11=null;
public ViewHolder(View row)
{
mRow = row;
}
public TextView gettitle()
{
if(null == title)
{
title = (TextView) mRow.findViewById(R.id.title);
}
return title;
}
public TextView getdetail()
{
if(null == detail)
{
detail = (TextView) mRow.findViewById(R.id.detail);
}
return detail;
}
public ImageView getImage()
{
if(null == i11)
{
i11 = (ImageView) mRow.findViewById(R.id.img);
}
return i11;
}
}
}
}
//mainlist.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<ListView
android:id="@android:id/list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
六年来，这仍然是一些搜索的顶端。 从那以后，事情发生了很大变化。 现在，事实上的标准或多或少地使用Volley和NetworkImageView来为您处理繁重的工作。
假设您已经正确设置了Apaters，Loaders和ListFragments，本谷歌官方教程将介绍如何使用NetworkImageView加载图像。 图像自动加载到后台线程中，并在UI线程上更新视图。 它甚至支持缓存。
链接地址: http://www.djcxy.com/p/93113.html上一篇: How to display a list of images in a ListView in Android?