You should first of all download that image and store it in a file instead
of directly decoding a 2MB stream (which depending of the compression
degree will of course explode to a much larger size in memory). From that
file you can load a smaller version of that image which fits into the view
that is going to display the bitmap. That's the clean way to avoid your out
of memory problems.
By the way, what you're trying to do in your second method called
getBitmapFromInputStream most likely cannot work. You are trying to read
from the same stream twice, first of all for determining the bitmap size,
the second time for decoding the actual bitmap. In between these two read
accesses the stream should be reset to its beginning. However, this is not
guaranteed to work. Some stream implementations are "one way only". Once it
is read there is no way back.
On Monday, December 10, 2012 9:42:37 AM UTC-6, snowdream wrote:
>
> Hi,everyone.
> if i want to get a large image (eg.a image which size is 2M or
> larger.)from url, i use the folllowing code ,and get the exception ."Out of
> Memory".
> Any good idea?
> Thank you.
>
>
> private Bitmap getBitmapFromUrl(String url) {
> Bitmap bitmap = null;
>
> try {
> URL imagePath = new URL(url);
> HttpURLConnection conn =
> (HttpURLConnection)imagePath.openConnection();
> conn.setConnectTimeout(CONNECT_TIMEOUT);
> conn.setReadTimeout(READ_TIMEOUT);
> conn.connect();
> InputStream is = (InputStream) conn.getContent();
> if (is != null) {
> // bitmap = getBitmapFromInputStream(is, width, height);
> bitmap = BitmapFactory.decodeStream((InputStream)
> conn.getContent());
> }
> } catch(Exception e) {
> e.printStackTrace();
> }
>
> return bitmap;
> }
>
>
> public static Bitmap getBitmapFromInputStream(InputStream is, int
> width, int height){
> Bitmap bitmap = null;
> if (null != is ) {
> BufferedInputStream bis = new BufferedInputStream(is);
>
> BitmapFactory.Options opts = null;
> if (width > 0 && height > 0) {
> opts = new BitmapFactory.Options();
> opts.inJustDecodeBounds = true;
> BitmapFactory.decodeStream(is, null, opts);
>
> // 计算图片缩放比例
> final int minSideLength = Math.min(width, height);
> opts.inSampleSize =
> BitmapUtils.computeSampleSize(opts.outWidth, opts.outHeight, minSideLength,
> width * height);
> opts.inJustDecodeBounds = false;
> opts.inInputShareable = true;
> opts.inPurgeable = true;
> }
>
> try {
> bitmap = BitmapFactory.decodeStream(bis, null, opts);
> } catch (OutOfMemoryError e) {
> e.printStackTrace();
> }
> }
> return bitmap;
> }
>
>
>
>
> --
> 杨辉
> Impossible is nothing!
>
>
>
>
> ------------------------------------------------------------------------------------
> HDExplorer APK (A Nice File Manager,Simplicity but not simple.）
>
> Google Market：
> https://market.android.com/details?id=com.hd.explorer
>
> Google Code：
> http://code.google.com/p/hdexplorer/
>
>
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