LoadingImgUtil.java

package com.hua.goddess.utils;

import java.util.Collections;
import java.util.LinkedList;
import java.util.List;

import android.graphics.Bitmap;
import android.view.View;
import android.widget.ImageView;
import android.widget.ProgressBar;

import com.hua.goddess.R;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.assist.FailReason;
import com.nostra13.universalimageloader.core.assist.ImageLoadingProgressListener;
import com.nostra13.universalimageloader.core.assist.SimpleImageLoadingListener;
import com.nostra13.universalimageloader.core.display.FadeInBitmapDisplayer;

/**
 * 加载图片工具类
 */
public class LoadingImgUtil {

	private static DisplayImageOptions DEFAULT_PIC_OPTIONS = new DisplayImageOptions.Builder()
			.showImageOnLoading(R.drawable.default_image)
			.showImageForEmptyUri(R.drawable.default_image)
			.showImageOnFail(R.drawable.default_image).cacheInMemory(true)
			.cacheOnDisc(true).considerExifParams(true)
			.bitmapConfig(Bitmap.Config.RGB_565).build();

	public static void loadimg(String url, ImageView imgview,
			final ProgressBar progressBar) {

		ImageLoader imageLoader = ImageLoader.getInstance();
		SimpleImageLoadingListener loadListener = null;
		ImageLoadingProgressListener loadProgressListener = null;

		if (progressBar != null) {
			loadListener = new SimpleImageLoadingListener() {
				@Override
				public void onLoadingStarted(String imageUri, View view) {
					progressBar.setProgress(0);
					progressBar.setVisibility(View.VISIBLE);
				}

				@Override
				public void onLoadingFailed(String imageUri, View view,
						FailReason failReason) {
					progressBar.setVisibility(View.GONE);
				}

				@Override
				public void onLoadingComplete(String imageUri, View view,
						Bitmap loadedImage) {
					progressBar.setVisibility(View.GONE);
				}
			};

			loadProgressListener = new ImageLoadingProgressListener() {
				@Override
				public void onProgressUpdate(String imageUri, View view,
						int current, int total) {
					progressBar.setProgress(Math
							.round(100.0f * current / total));
				}
			};
		}
		imageLoader.displayImage(url, imgview, DEFAULT_PIC_OPTIONS,
				loadListener, loadProgressListener);

	}

	public static void loadimgAnimate(String url, ImageView imgview) {
		ImageLoader imageLoader = ImageLoader.getInstance();

		imageLoader.displayImage(url, imgview, DEFAULT_PIC_OPTIONS,
				new AnimateFirstDisplayListener());
	}

	private static class AnimateFirstDisplayListener extends
			SimpleImageLoadingListener {

		static final List<String> displayedImages = Collections
				.synchronizedList(new LinkedList<String>());

		@Override
		public void onLoadingComplete(String imageUri, View view,
				Bitmap loadedImage) {
			if (loadedImage != null) {
				ImageView imageView = (ImageView) view;
				boolean firstDisplay = !displayedImages.contains(imageUri);
				if (firstDisplay) {
					FadeInBitmapDisplayer.animate(imageView, 500);
					displayedImages.add(imageUri);
				}
			}
		}
	}
}