private Bitmap getBitmapFromUrl(String imgUrl, int minSide, int maxPixels) {
URL url;
Bitmap bitmap = null;
try {
url = new URL(imgUrl);
InputStream is = url.openConnection().getInputStream();
BufferedInputStream bis = new BufferedInputStream(is);
bitmap = BitmapLoader.getThumbnail(bis, minSide, maxPixels);
bis.close();
is.close();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return bitmap;
}
public void run() {
if (desc == null) {
return;
}
Bitmap bitmap = null;
// 如果用户自定义了下载图片的方式，则调用用户的
if (hasLoader(desc)) {
bitmap = invokeLoader(desc);
if (null != bitmap) {
desc.bitmap = bitmap;
if (desc.imageLoader.isCacherToFile()) {
File file = desc.imageLoader.cacheFile();
if (null != file && saveToPath(file, bitmap)) {}
}
notifyLoadResult(desc, true, desc.imageLoader.isCacheToMemery());
} else {
notifyLoadResult(desc, false, false);
}
return;
}
if (desc.filePath != null) {
try {
bitmap = BitmapLoader.getThumbnail(desc.filePath, desc.minSide, desc.maxPixels);
} catch (Exception e) {
e.printStackTrace();
}
if (bitmap != null) {
desc.bitmap = bitmap;
notifyLoadResult(desc, true, true);
} else {
notifyLoadResult(desc, false, false);
}
} else {
// 先从文件中读.
if (null != desc.key) {
String path = desc.path == null ? cachePath : desc.path;
File cacheFile = new File(path, desc.key);
if (cacheFile.exists()) {
// BitmapFactory.Options opt = new BitmapFactory.Options();
// opt.inPreferredConfig = Bitmap.Config.RGB_565;
// opt.inPurgeable =true;
// opt.inInputShareable = true;
bitmap = BitmapLoader.getThumbnail(cacheFile.getPath(), desc.minSide, desc.maxPixels);
}
if (null != bitmap) {
desc.bitmap = bitmap;
notifyLoadResult(desc, true, true);
return;
}
}
// 如果文件读取失败则从网络下载
if (bitmap == null && null != desc.url) {
try {
bitmap = getBitmapFromUrl(desc.url, desc.minSide, desc.maxPixels);
if (null == bitmap) throw new Exception("bitmap is null ,http request failed");
// 存入本地再缓存在内存
String path = desc.path == null ? cachePath : desc.path;
String key =
desc.key == null ? desc.url.substring(desc.url.lastIndexOf("/") + 1) : desc.key;
File dir = new File(path);
dir.mkdirs();
// 清空缓存的策越，目前是大于100M就将缓存全部清空
if (dir.length() > MAX_CACHE_FILE_SIZE) clearFileCache(path);
File file = new File(path, key);
if (saveToPath(file, bitmap)) {
desc.bitmap = bitmap;
notifyLoadResult(desc, true, true);
} else {
desc.description = "保存图片失败(可能原因图片无效)";
notifyLoadResult(desc, false, false);
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
desc.description = e.getMessage();
notifyLoadResult(desc, false, false);
}
}
}
}