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我正在尝试对 url 进行 http 请求。我认为它会在响应正文中使用位图进行响应，但出现以下错误：

03-13 22:54:36.106: W/System.err(26547): org.springframework.web.client.RestClientException: Could not extract response: no suitable HttpMessageConverter found for response type [android.graphics.Bitmap] and content type [image/jpg;charset=utf-8]
03-13 22:54:36.106: W/System.err(26547):    at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:79)
03-13 22:54:36.116: W/System.err(26547):    at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:655)
03-13 22:54:36.116: W/System.err(26547):    at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:641)
03-13 22:54:36.116: W/System.err(26547):    at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:484)
03-13 22:54:36.116: W/System.err(26547):    at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:439)
03-13 22:54:36.116: W/System.err(26547):    at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:415)
03-13 22:54:36.116: W/System.err(26547):    at com.hera.ooshopping.AsyncPicLoading.getFileFromServer(AsyncPicLoading.java:174)
03-13 22:54:36.116: W/System.err(26547):    at com.hera.ooshopping.AsyncPicLoading.doInBackground(AsyncPicLoading.java:65)
03-13 22:54:36.116: W/System.err(26547):    at com.hera.ooshopping.AsyncPicLoading.doInBackground(AsyncPicLoading.java:1)

从错误看来，响应是 JPG（第一行），但我不太确定。我可以解析对字符串的响应，这会创建一个带有奇怪字符的巨大字符串，而不是 base64。

我如何将我的响应体解析为位图或图像什么是可用的？我真的不明白。我的请求代码如下：

HttpBasicAuthentication authHeader = new HttpBasicAuthentication(user.getUsername(), user.getPassword());
HttpHeaders requestHeaders = new HttpHeaders();
requestHeaders.setAuthorization(authHeader);

HttpEntity<?> requestEntity = new HttpEntity<Object>(requestHeaders);
System.out.println("entity:" + requestEntity.toString());

RestTemplate restTemplate = new RestTemplate();
restTemplate.getMessageConverters().add(new StringHttpMessageConverter());
restTemplate.getMessageConverters().add(new ByteArrayHttpMessageConverter());
restTemplate.getMessageConverters().add(new ResourceHttpMessageConverter());

try {
    // GET Request
    ResponseEntity<Bitmap> response = restTemplate.exchange(url, HttpMethod.GET, requestEntity, Bitmap.class);

    return response.getBody();
} catch (Exception e) {
    e.printStackTrace();
    return null;
}
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1 回答 1

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我只是偶然发现了同样的问题。

ResourceHttpMessageconverter不能直接转换Resource为位图。相反，您可以使用它来创建您的位图：

ResponseEntity<Resource> response = restTemplate.exchange(url, HttpMethod.GET, requestEntity, Resource.class);
Bitmap bitmap = BitmapFactory.decodeStream(response.getBody().getInputStream());

这段代码对我有用。让我知道这是否能解决您的问题。

于 2013-05-09T19:36:26.480 回答