Question

我在将输入流从网络转换为位图时遇到问题。仅当输入图像类型为.BMP（位图）时才会出现问题。在这种情况下： bitmapFactory.decodeStream返回null 。

任何提示如何解决此问题或我应该在哪里继续调试？

平台：Android（Honeycomb）

URLConnection conn = url.openConnection();
conn.connect();

inputStream = conn.getInputStream();

bufferedInputStream = new BufferedInputStream(inputStream);

bmp = BitmapFactory.decodeStream(bufferedInputStream);

Answer 1

感谢@Amir指出日志。发现了一条线：

decoder->decode returned false

这似乎是一个常见问题。进行搜索我找到了解决方案。

我之前的代码：

URLConnection conn = url.openConnection();
conn.connect();

inputStream = conn.getInputStream();

bufferedInputStream = new BufferedInputStream(inputStream);

bmp = BitmapFactory.decodeStream(bufferedInputStream);

有效的代码：

HttpGet httpRequest = null;

try {
    httpRequest = new HttpGet(url.toURI());
} catch (URISyntaxException e) {
    e.printStackTrace();
}

HttpClient httpclient = new DefaultHttpClient();

HttpResponse response = (HttpResponse) httpclient.execute(httpRequest);

HttpEntity entity = response.getEntity();

BufferedHttpEntity bufHttpEntity = new BufferedHttpEntity(entity);

InputStream instream = bufHttpEntity.getContent();

bmp = BitmapFactory.decodeStream(instream);

Source

Answer 2

这里是单行答案

val bitmap = BitmapFactory.decodeStream(inputStream)

返回Bitmap

将输入流转换为位图

2 个答案: