android - setRequestProperty 抛出 java.lang.IllegalStateException : Cannot set request property after connection is made

Question

我收到 java.lang.IllegalStateException:

java.lang.IllegalStateException: Cannot set request property after connection is made error when setRequestProperty 方法被调用后url.openConnection();

这是我正在尝试的:

URL url = new URL("https://49.205.102.182:7070/obsplatform/api/v1/mediadevices/545b801ce37e69cc");
         urlConnection = (HttpsURLConnection) url
        .openConnection();
urlConnection.setRequestProperty("Content-Type","application/json");

有什么建议吗？提前致谢。

Answer 1

如果您在调试观察器调用中通常会发生这种情况，例如 conn.getResponseCode() 或在请求实际发出或完成之前查询请求结果的任何内容。这导致，在调试期间，观察者在正确设置您的请求之前执行请求，然后它变得无效。