android平台UniversalImageLoader(异步加载大量图片

来源：互联网发布：swift for windows 编辑：程序博客网时间：2024/05/29 02:43

摘要:第四种ImageGallery效果如图：测试关键代码： public class ImageGalleryActivity extends BaseActivity{private Gallery gallery;private DisplayImageOptions options;public void onCreate(Bundle savedInstanc

第四种ImageGallery效果如图：

测试关键代码：

public class ImageGalleryActivity extends BaseActivity{private Gallery gallery;private DisplayImageOptions options;public void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.ac_image_gallery);Bundle bundle = getIntent().getExtras();String[] imageUrls = bundle.getStringArray(Extra.IMAGES);int galleryPosition = bundle.getInt(Extra.IMAGE_POSITION, 0);options = new DisplayImageOptions.Builder().showImageForEmptyUri(R.drawable.image_for_empty_url).showStubImage(R.drawable.stub_image).cacheInMemory().cacheOnDisc().build();gallery = (Gallery) findViewById(R.id.gallery);gallery.setAdapter(new ImagePagerAdapter(imageUrls));gallery.setSelection(galleryPosition);}@Overrideprotected void onStop(){imageLoader.stop();super.onStop();}private class ImagePagerAdapter extends BaseAdapter{private String[] images;private LayoutInflater inflater;ImagePagerAdapter(String[] images){this.images = images;inflater = getLayoutInflater();}@Overridepublic int getCount(){return images.length;}@Overridepublic Object getItem(int position){return position;}@Overridepublic long getItemId(int position){return position;}@Overridepublic View getView(int position, View convertView, ViewGroup parent){ImageView imageView = (ImageView) convertView;if (imageView == null){imageView = (ImageView) inflater.inflate(R.layout.item_gallery_image, parent, false);}imageLoader.displayImage(images[position], imageView, options);return imageView;}}}

实例中通过imageLoader成员负责图片操作！初始化如下：
protected ImageLoader imageLoader = ImageLoader.getInstance();

此处主要是围绕UniversalImageLoader使用的介绍

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