Android Bitmap出现 decoder->decode returned false 错误

在开发Android中广告条，实现多张广告图片切换，遇到广告图片下载失败，抓取LOG

出现的问题为 decoder->decode returned false。

上网搜索发现解决办法 ，

参考文章 Android decoder->decode returned false for Bitmap download  

文章地址 http://blog.163.com/dangzhengtao@yeah/blog/static/77800874201121814455655/

一种方法是

1.创建静态类FlushedInputStream

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 b = read();                    if (b < 0) {                        break;  // we reached EOF                    } else {                        bytesSkipped = 1; // we read one byte                    }                }                totalBytesSkipped += bytesSkipped;            }            return totalBytesSkipped;        }    }

2. 修改图片下载代码

public void setDrawable() {        URL url = null;        URLConnection conn = null;        try {            url = new URL(“图片地址”);            conn = url.openConnection();            Bitmap b = BitmapFactory.decodeStream(new FlushedInputStream(conn.getInputStream()));            this.drawable = new BitmapDrawable(b);        } catch (Exception ex) {            ex.printStackTrace();        } finally {            url = null;            conn = null;        }    }

另一种方法是

这里直接帖代码了，没有验证，有兴趣的朋友可以研究。

public static Bitmap loadImageFromUrl(String url) {        URL m;        InputStream i = null;        BufferedInputStream bis = null;        ByteArrayOutputStream out =null;        try {            m = new URL(url);            i = (InputStream) m.getContent();            bis = new BufferedInputStream(i,1024 * 8);            out = new ByteArrayOutputStream();            int len=0;            byte[] buffer = new byte[1024];            while((len = bis.read(buffer)) != -1){                out.write(buffer, 0, len);            }            out.close();            bis.close();        } catch (MalformedURLException e1) {            e1.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }        byte[] data = out.toByteArray();        Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);        //Drawable d = Drawable.createFromStream(i, "src");        return bitmap;    }

 

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