我遇到了 OutOfMemoryException:
E/AndroidRuntime( 3013): java.lang.OutOfMemoryError: bitmap size exceeds VM budget
E/AndroidRuntime( 3013): at android.graphics.BitmapFactory.nativeDecodeStream(Native Method)
E/AndroidRuntime( 3013): at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:375)
E/AndroidRuntime( 3013): at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:394)
在下面的函数中:
static Bitmap downloadBitmap(String url)
{
final HttpClient client = new DefaultHttpClient();
final HttpGet getRequest = new HttpGet(url);
try
{
HttpResponse response = client.execute(getRequest);
final int statusCode = response.getStatusLine().getStatusCode();
// Check HTTP Status code
if (statusCode != HttpStatus.SC_OK)
{
debugPrint("ImageDownloader StatusCode Error " + statusCode + " while retrieving bitmap from " + url);
return null;
}
else;
final HttpEntity entity = response.getEntity();
if (entity != null)
{
InputStream inputStream = null;
try
{
inputStream = entity.getContent();
if( inputStream == null)
{
debugPrint("ImageDownloader::downloadBitmap() - INPUTSTREAM = NULL!!!!!!");
}
else;
// THIS LINE IS GIVING THE ERROR
final Bitmap bitmap = BitmapFactory.decodeStream( new FlushedInputStream(inputStream));
if( bitmap == null)
{
debugPrint("LocrPhoto::downloadBitmap() - about to return BITMAP =NULL!!!!!!");
}
else;
return bitmap;
}
catch (Exception e)
{
// Could provide a more explicit error message for IOException or IllegalStateException
getRequest.abort();
debugPrint("LocrPhoto::downloadBitmap() Error while decoding bitmap from " + url + "\n"+ e.toString());
}
finally
{
if (inputStream != null)
{
inputStream.close();
}
entity.consumeContent();
}
}
else
{
debugPrint("LocrPhoto::downloadBitmap("+url+") - entity = NULL!!!!!");
}
}
catch (Exception e)
{
// Could provide a more explicit error message for IOException or IllegalStateException
//getRequest.abort();
debugPrint("LocrPhoto::downloadBitmap() Error while retrieving bitmap from " + url + "\n"+ e.toString());
}
finally
{
if (client != null)
{
// CLOSE CONNECTION
}
}
debugPrint("LocrPhoto::downloadBitmap("+url+") - returning NULL at end of function");
return null;
}
FlushedInputStream(虽然我在添加这段代码之前得到了错误):
// A Class to hopefully avoid the BitmapFactory.decodeStream() returning null bug
// http://code.google.com/p/android/issues/detail?id=6066
static class FlushedInputStream extends FilterInputStream {
public FlushedInputStream(InputStream inputStream) {
super(inputStream);
}
@Override
public long skip(long n) throws IOException {
long totalBytesSkipped = 0L;
while (totalBytesSkipped < n) {
long bytesSkipped = in.skip(n - totalBytesSkipped);
if (bytesSkipped == 0L) {
int byt = read();
if (byt < 0) {
break; // we reached EOF
} else {
bytesSkipped = 1; // we read one byte
}
}
totalBytesSkipped += bytesSkipped;
}
return totalBytesSkipped;
}
}
基本上,我有一个下载图像的 Activity ,将它们放置在框架布局中,然后淡入淡出帧以进行幻灯片放映。 framelayout 有两个 imageview child 。
我看到有人说 SoftReference 被用来防止 OOMExceptions,但我不明白如何将其应用于我的代码以(希望)防止此错误。
谁能解释一下这是如何实现的?
最佳答案
我正在处理与您相同的问题,我发现问题是 BitmapFactory.decodeStream 的内存消耗(如日志所述)。您需要做的是在调用 BitmapFactory.decodeStream 之前缩放您的位图,您可以找到一篇非常好的文章来解决您的问题!
http://developer.android.com/training/displaying-bitmaps/load-bitmap.html
希望对您有所帮助!
关于Android:BitmapFactory.decodeStream OutOfMemoryException - SoftReference 是解决方案吗?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/4834516/