Question

    HttpClient client = new DefaultHttpClient();
    String url = "http://maps.google.co.in/maps?q=restaurants&radius=5000&sll=23,72&output=json";       
    HttpGet request = new HttpGet(url);
    HttpResponse response = client.execute(request);
    if(response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {

    InputStream inputStream = response.getEntity().getContent();
    }
    else
    {
        Toast.makeText(getBaseContext(), "error....", Toast.LENGTH_LONG);
    }

这是我的简单代码，

但它崩溃了我的应用程序。向我展示了NPE和未被捕获的异常。任何人都可以帮我排除故障并解决这个问题。

Answer 1

请尝试运行以下代码。

        HttpGet getMethod = new HttpGet("http://maps.google.co.in/maps?q=restaurants&radius=5000&sll=23,72&output=json");

        DefaultHttpClient hc = new DefaultHttpClient();

        HttpResponse response = hc.execute(getMethod);
        HttpEntity entity = response.getEntity();

        // If the response does not enclose an entity, there is no need
        // to worry about connection release

        if (entity != null) 
        {
            InputStream inStream = entity.getContent();
            result= convertStreamToString(inStream);
            Log.i("------------------ Reulst",result);
        }

public static String convertStreamToString(InputStream is)
{
   BufferedReader reader = new BufferedReader(new InputStreamReader(is));
   StringBuilder sb = new StringBuilder();

   String line = null;
   try 
   {
       while ((line = reader.readLine()) != null) 
       {
           sb.append(line + "\n");
       }
   } 
   catch (IOException e) 
   {
       e.printStackTrace();
   } 
   finally 
   {
       try 
       {
           is.close();
       } 
       catch (IOException e) 
       {
           e.printStackTrace();
       }
   }
   return sb.toString();

}

在json响应中的NPE

1 个答案: