将输入流转换为位图

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。

有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（蜂巢）

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

inputStream = conn.getInputStream();

bufferedInputStream = new BufferedInputStream(inputStream);

bmp = BitmapFactory.decodeStream(bufferedInputStream);

Answer 1

谢谢@Amir 指出日志。发现了一行：

decoder->decode returned false

这似乎是一个常见问题。经过搜索，我找到了解决方案。

我以前的代码：

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

inputStream = conn.getInputStream();

bufferedInputStream = new BufferedInputStream(inputStream);

bmp = BitmapFactory.decodeStream(bufferedInputStream);

正在运行的代码：

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);

来源

Answer 2

这是一个单行答案

val bitmap = BitmapFactory.decodeStream(inputStream)

返回一个位图