Question

我想在后台线程中发送一个get请求，并拥有以下代码：

public HttpResponse sendRequestInBackground(String clickUrl){
    StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
    StrictMode.setThreadPolicy(policy); 

    HttpResponse response = null;
    try {        
            HttpClient client = new DefaultHttpClient();
            HttpGet request = new HttpGet(clickUrl);
            HttpContext context = new BasicHttpContext();
            response = client.execute(request, context);
            Log.d("SEND_GET_REQUEST", "GET REQUEST SENT WITH URL: " + clickUrl);
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }  catch (Exception e){
          e.printStackTrace();
        }
        return response;
    }

但是继续java.lang.IllegalStateException: Scheme 'market' not registered.任何想法，我做错了什么？

Answer 1

您不是以这种方式创建后台线程，只是通过强制允许主线程上的网络操作来阻止您的应用程序崩溃。执行此类操作的有效方法是使用AsyncTask类。顺便说一句下面的代码，每次都能为我提供http获取请求。

HttpGet httpRequest = new HttpGet(url);
                HttpClient httpclient = new DefaultHttpClient();
                HttpResponse response = null;
                try {
                    response = (HttpResponse) httpclient.execute(httpRequest);
                } catch (ClientProtocolException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

Answer 2

这些链接可能会对您有所帮助：

Get the final URL of a redirected request with unconventional scheme

https://groups.google.com/forum/#!topic/android-developers/jh9HAbIUn48

Android, how can i encapsulate an AsyncTask class with network connections

Query in AsyncTask giving illegalStateException

Get the final URL of a redirected request with unconventional scheme

Answer 3

看起来您发送的网址格式不正确。我猜你的网址是这样的：market://details?id=com.example.bacon这不是有效的网址。如果您尝试将Play商店打开到想要使用Intent的应用程序。

像这样（其中com.example.bacon是你的应用程序的包名）：

Intent intent = new Intent(Intent.ACTION_VIEW); 
intent.setData(Uri.parse("market://details?id=com.example.bacon")); 
startActivity(intent);

没有更多的代码发布，这是我能做的最好的。

Answer 4

我使用http://loopj.com/android-async-http/，它对我来说很有效。

Android - 在后台发送get请求时出现IllegalStateException

4 个答案: