MalformedURLException：？

Question

我們正在使用服務調用異步任務這項服務是由第三方，我需要調用並獲取JSON數據，然後根據我需要移動其他事情，所以我用這個代碼。

private class FetchJsonData extends AsyncTask<Void, Void, String> { 

    @Override 
    protected String doInBackground(Void... params) { 
     // These two need to be declared outside the try/catch 
     // so that they can be closed in the finally block. 
     HttpURLConnection urlConnection = null; 
     BufferedReader reader = null; 

     // Will contain the raw JSON response as a string. 
     String forecastJsonStr = null; 

     try { 
      // Construct the URL for the OpenWeatherMap query 
      // Possible parameters are avaiable at OWM's forecast API page, at 
      // http://openweathermap.org/API#forecast 


      URL url = new URL("android-app://ir.com.irremote.ir.com.irremote.activity/http/" + "api.abc.com/TVlistings/v9/listings/services/postalcode/37215/info?locale=en-US&countrycode=US&format=json&apikey=abc"); 
      urlConnection = (HttpURLConnection) url.openConnection(); 
      // Create the request to OpenWeatherMap, and open the connection 
      urlConnection.setRequestMethod("GET"); 
      urlConnection.connect(); 
      urlConnection.setDoOutput(true); 
      urlConnection.setDoInput(true); 
      // Read the input stream into a String 
      InputStream inputStream = urlConnection.getInputStream(); 
      StringBuffer buffer = new StringBuffer(); 
      if (inputStream == null) { 
       // Nothing to do. 
       return null; 
      } 
      reader = new BufferedReader(new InputStreamReader(inputStream)); 

      String line; 
      while ((line = reader.readLine()) != null) { 
       // Since it's JSON, adding a newline isn't necessary (it won't affect parsing) 
       // But it does make debugging a *lot* easier if you print out the completed 
       // buffer for debugging. 
       buffer.append(line + "\n"); 
      } 

      if (buffer.length() == 0) { 
       // Stream was empty. No point in parsing. 
       return null; 
      } 
      forecastJsonStr = buffer.toString(); 
      return forecastJsonStr; 
     } catch (IOException e) { 
      Log.e("PlaceholderFragment", "Error ", e); 
      // If the code didn't successfully get the weather data, there's no point in attemping 
      // to parse it. 
      return null; 
     } finally { 
      if (urlConnection != null) { 
       urlConnection.disconnect(); 
      } 
      if (reader != null) { 
       try { 
        reader.close(); 
       } catch (final IOException e) { 
        Log.e("PlaceholderFragment", "Error closing stream", e); 
       } 
      } 
     } 
    } 

    @Override 
    protected void onPostExecute(String s) { 
     super.onPostExecute(s); 

     Log.i("json", "" + s); 
    } 
} 

之後，我EXCUTE上的onCreate（），但它給了我一些例外，我不知道爲什麼它的到來。我把這裏登錄，請看到這一點：

致命異常：主要 過程：ir.dumadu.com.irremote，PID：20759 java.lang.RuntimeException：無法停止活動{ir.dumadu.com.irremote/ir.dumadu.com.irremote.ir.dumadu.com.irremote.activity。 ChoseTransmitter}：java.lang.IllegalArgumentException：AppIndex：URI主機必須匹配包名，並遵循格式（android-app：//// [host_path]）。提供的URI：android-app://ir.dumadu.com.irremote.ir.dumadu.com.irremote.activity/http/host/path at android.app.ActivityThread.handleSleeping（ActivityThread.java:4679） at android.app.ActivityThread.access $ 3400（ActivityThread.java:211） at android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1934） at android.os.Handler.dispatchMessage（Handler.java:102） 在android.os.Looper.loop（Looper.java:145） at android.app.ActivityThread.main（ActivityThread.java:6946） at java.lang.reflect.Method.invoke（Native Method） at java。 lang.reflect.Method.invoke（Method.java:372） at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:1404） at com.android.internal.os.ZygoteInit.main（ZygoteInit.java:1199） 引起來自：java.lang。 IllegalArgumentException：AppIndex：URI主機必須匹配包名稱並遵循格式（android-app：//// [host_path]）。提供的URI：android-app://ir.dumadu.com.irremote.ir.dumadu.com.irremote.activity/http/host/path at com.google.android.gms.internal.zzju.zzb（Unknown Source ） at com.google.android.gms.internal.zzju.zza（Unknown Source） at com.google.android.gms.internal.zzjt.zza（Unknown Source） at com.google.android.gms.internal .zzju.zza（Unknown Source） at com.google.android.gms.internal.zzju.end（Unknown Source） at ir.dumadu.com.irremote.ir.dumadu.com.irremote.activity.ChoseTransmitter.onStop （ChoseTransmitter.java:169） at android.app.Instrumentation.callActivityOnStop（Instrumentation.java:1305） at andro android.app.ActivityThread.access中的id.app.Activity.performStop（Activity.java:6777） at android.app.ActivityThread.handleSleeping（ActivityThread.java:4676） at android.app.ActivityThread.access $ 3400（ActivityThread.java:211） at android .app.ActivityThread $ H.handleMessage（ActivityThread.java:1934） at android.os.Handler.dispatchMessage（Handler.java:102） at android.os.Looper.loop（Looper.java:145） at android .app.ActivityThread.main（ActivityThread.java:6946） at java.lang.reflect.Method.invoke（Native Method）

這裏有什麼我使用這個網址ie m y後端網址。這個網址給了我們一些服務提供商。當我在網頁瀏覽器中打開這個網址時，它給了我json格式化的數據。但是當我通過我們的移動應用程序調用它的時候給出了上面的log.if你發現任何錯誤，或者我需要做一些其他的方式，你肯定回覆我。 在此先感謝。

Answer 1

private class FetchJsonData extends AsyncTask<Void, Void, String> { 

    @Override 
    protected String doInBackground(Void... params) { 
     // These two need to be declared outside the try/catch 
     // so that they can be closed in the finally block. 
     HttpURLConnection urlConnection = null; 
     BufferedReader reader = null; 

     // Will contain the raw JSON response as a string. 
     String forecastJsonStr = null; 

     try { 
      // Construct the URL for the OpenWeatherMap query 
      // Possible parameters are avaiable at OWM's forecast API page, at 


      String urls="http://" + "api.abc.com/TVlistings/v9/listings/services/postalcode/37215/info?locale=en-US&countrycode=US&format=json&apikey=abc"; 
      URL url = new URL(urls); 
      urlConnection = (HttpURLConnection) url.openConnection(); 
      // Create the request to OpenWeatherMap, and open the connection 
      urlConnection.setRequestMethod("GET"); 
      urlConnection.connect(); 
      //urlConnection.setDoOutput(true); 
      //urlConnection.setDoInput(true); 
      // Read the input stream into a String 
      InputStream inputStream = urlConnection.getInputStream(); 
      StringBuffer buffer = new StringBuffer(); 
      if (inputStream == null) { 
       // Nothing to do. 
       return null; 
      } 
      reader = new BufferedReader(new InputStreamReader(inputStream)); 

      String line; 
      while ((line = reader.readLine()) != null) { 
       // Since it's JSON, adding a newline isn't necessary (it won't affect parsing) 
       // But it does make debugging a *lot* easier if you print out the completed 
       // buffer for debugging. 
       buffer.append(line + "\n"); 
      } 

      if (buffer.length() == 0) { 
       // Stream was empty. No point in parsing. 
       return null; 
      } 
      forecastJsonStr = buffer.toString(); 
      return forecastJsonStr; 
     } catch (IOException e) { 
      Log.e("PlaceholderFragment", "Error ", e); 
      // If the code didn't successfully get the weather data, there's no point in attemping 
      // to parse it. 
      return null; 
     } finally { 
      if (urlConnection != null) { 
       urlConnection.disconnect(); 
      } 
      if (reader != null) { 
       try { 
        reader.close(); 
       } catch (final IOException e) { 
        Log.e("PlaceholderFragment", "Error closing stream", e); 
       } 
      } 
     } 
    } 

    @Override 
    protected void onPostExecute(String s) { 
     super.onPostExecute(s); 

     Log.i("json", "" + s); 
    } 
} 

現在，它的工作。