package com.ljp.laucher.util;
import java.io.File;
import java.io.FileInputStream;
import java.lang.ref.SoftReference;
import java.util.HashMap;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.Handler;
import android.os.Message;
public class ImgAsync_List {
private HashMap<String, SoftReference<Drawable>> imageCache;
public ImgAsync_List() {
imageCache = new HashMap<String, SoftReference<Drawable>>();
}
public Drawable loadDrawable(final Context context,final String imageUrl, final ImageCallback_LW imageCallback) {
if(imageUrl==null|| imageUrl.equals("")) return null;
if (imageCache.containsKey(imageUrl)) {
SoftReference<Drawable> softReference = imageCache.get(imageUrl);
Drawable drawable = softReference.get();
if (drawable != null) {
return drawable;
}
}
final Handler handler = new Handler() {
public void handleMessage(Message message) {
imageCallback.imageLoaded((Drawable) message.obj, imageUrl);
}
};
new Thread() {
@Override
public void run() {
Bitmap bitmap = null;
File cacheDir;
if (android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED)){
cacheDir=new File(android.os.Environment.getExternalStorageDirectory(),"night_girls/icons");
}else{
cacheDir=context.getCacheDir();
}
if (!cacheDir.exists()) {
cacheDir.mkdirs();
}
File file = new File(cacheDir+ "/" +imageUrl.hashCode());
boolean isLoad = false;
if (!file.isFile()) {
isLoad = ImageOperation.loadImageFromUrl(context, imageUrl,"night_girls/icons");
} else {
FileInputStream fis;
int size = 0;
try {
fis = new FileInputStream(file);
size = (fis.available() / 1000);
} catch (Exception e) {
// TODO Auto-generated catch block
System.out.println("异常-》图片文件大小判断");
}
if (size <= 0) {
file.delete();
isLoad =ImageOperation.loadImageFromUrl(context, imageUrl,"night_girls/icons");
}
}
if (isLoad)
bitmap = null;
else
bitmap = BitmapFactory.decodeFile(cacheDir+ "/" +imageUrl.hashCode());
Drawable drawable = new BitmapDrawable(bitmap);
imageCache.put(imageUrl, new SoftReference<Drawable>(drawable));
Message message = handler.obtainMessage(0, drawable);
handler.sendMessage(message);
}
}.start();
return null;
}
public interface ImageCallback_LW{
public void imageLoaded(Drawable imageDrawable, String imageUrl);
}
}