Android 如何使用okhttp将验证代码放入imageView？

我使用okhttp3构建一个带有cookie和会话的请求，response.body（）是验证代码。inputStream不为空，但位图为空。我尝试了下面的方法，但是位图也是空的

Request request = new Request.Builder()
                   .url(url)
                   .addHeader("Cookie", "JSESSIONID="+sessionId)
Response response = client.newCall(request).execute();
if (response.isSuccessful()) {
    InputStream inputStream = response.body().byteStream();
    Bitmap bitmap = BitmapFactory.decodeStream(inputStream);
    imageView.setImageBitmap(bitmap);
}

我建议使用直接在ImageView中下载图像

毕加索图书馆主页上的示例：

private Bitmap convertBitmap(final Response response) throws IOException {
    InputStream inputStream = response.body().byteStream();
    ByteArrayOutputStream outStream = new ByteArrayOutputStream();
    byte[] buffer = new byte[1024];
    byte[] bmp_buffer;
    int len = 0;
    while ((len = inputStream.read(buffer)) != -1) {
        outStream.write(buffer, 0, len);
    }
    outStream.close();
    inputStream.close();
    bmp_buffer = outStream.toByteArray();
    return BitmapFactory.decodeByteArray(bmp_buffer, 0, bmp_buffer.length);
}

此外，您还可以在下载图像时放置占位符：

String imgUrl = "http://i.imgur.com/DvpvklR.png";
Picasso.with(context).load(imgUrl).into(imageView);

放置错误图像，如果下载失败：

Picasso.with(context).load(imgUrl).placeholder(R.drawable.placeholder).into(imageView);

包含cookie的完整代码：

Picasso.with(context).load(imgUrl).error(R.drawable.error_image).into(imageView);

---

您确定响应中的byteArray是图像吗？是的。我已经使用Glide尝试了url，它可以在ImageView中显示。如果我想使用cookie，我应该如何设置它？当然可能。您好，我试着给毕加索添加曲奇，但我还是无法得到图像，为什么？client=new-OkHttpClient.Builder（）.addInterceptor（new-Interceptor（）{public Response intercept（Chain-Chain）抛出IOException{Request-Request=Chain.Request（）.newBuilder（）.addHeader（“Cookie”，“JSESSIONID=abc3St68rRb0V7U5UqLLv；Cookie_-test=1”）.build（）；return-Chain.proced（Request）；}.build（）；毕加索-毕加索=新的Picasso.Builder（MainActivity.this）.downloader（新的OkHttp3Downloader（客户端））.build（）；加载（url）.into（imageView）；你有stacktrace吗？

IOException

通常是关于连接问题的。你能检查一下吗？

OkHttpClient client = new OkHttpClient();
client.interceptors().add(new Interceptor {  

    @Override  
    public Response intercept(Chain chain) throws IOException {  
        Request.Builder request = chain.request().newBuilder();  
        request.addHeader("Cookie", "JSESSIONID="+sessionId);  
        return chain.proceed(request.build());  
    }  
});  

CookieManager cookieManager = new CookieManager();
cookieManager.setCookiePolicy(CookiePolicy.ACCEPT_ALL);
client.setCookieHandler(cookieManager);

// Create the downloader for Picasso to use
OkHttpDownloader downloader = new OkHttpDownloader(client);
Picasso picasso = new Picasso.Builder(context).downloader(downloader).build();

picasso.load(imgUrl).placeholder(R.drawable.placeholder).error(R.drawable.error_image).into(imageView);