@Override
public Response<Bitmap> parseNetworkResponse(NetworkResponse response) {
synchronized (sDecodeLock) {
try {
return doParse(response);
} catch (OutOfMemoryError e) {
KJLoger.debug("Caught OOM for %d byte image, url=%s", response.data.length, getUrl());
return Response.error(new KJHttpException(e));
}
}
}
/**
* 关于本函数的详细解释，可以看我的博客： http://blog.kymjs.com/kjframeforandroid/2014/12/05/02/
*
* @param response
* @return
*/
private Response<Bitmap> doParse(NetworkResponse response) {
byte[] data = response.data;
BitmapFactory.Options option = new BitmapFactory.Options();
Bitmap bitmap = null;
if (mMaxWidth <= 0 && mMaxHeight <= 0) {
bitmap = BitmapFactory.decodeByteArray(data, 0, data.length, option);
} else {
option.inJustDecodeBounds = true;
BitmapFactory.decodeByteArray(data, 0, data.length, option);
int actualWidth = option.outWidth;
int actualHeight = option.outHeight;
// 计算出图片应该显示的宽高
int desiredWidth = getResizedDimension(mMaxWidth, mMaxHeight, actualWidth, actualHeight);
int desiredHeight = getResizedDimension(mMaxHeight, mMaxWidth, actualHeight, actualWidth);
option.inJustDecodeBounds = false;
option.inSampleSize =
findBestSampleSize(actualWidth, actualHeight, desiredWidth, desiredHeight);
Bitmap tempBitmap = BitmapFactory.decodeByteArray(data, 0, data.length, option);
// 做缩放
if (tempBitmap != null
&& (tempBitmap.getWidth() > desiredWidth || tempBitmap.getHeight() > desiredHeight)) {
bitmap = Bitmap.createScaledBitmap(tempBitmap, desiredWidth, desiredHeight, true);
tempBitmap.recycle();
} else {
bitmap = tempBitmap;
}
}
if (bitmap == null) {
return Response.error(new KJHttpException(response));
} else {
Response<Bitmap> b =
Response.success(
bitmap, response.headers, HttpHeaderParser.parseCacheHeaders(mConfig, response));
return b;
}
}