java.lang.RuntimeException: Fehler beim Ausführen doInBackground (

Question

Prozess: com.example.dell.api, PID: 22968 java.lang.RuntimeException: Fehler beim Ausführen doInBackground() bei android. os.AsyncTask $ 3.done (AsyncTask.java304) bei java.util.concurrent.FutureTask.finishCompletion (FutureTask.java:355) bei java.util.concurrent.FutureTask.setException (FutureTask.java:222) bei java.util.concurrent.FutureTask.run (FutureTask.java:242) bei android.os.AsyncTask $ SerialExecutor $ 1.run (AsyncTask.java:231) bei java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor. Java: 1 112) bei java.util.concurrent.ThreadPoolExecutor $ Worker.run (ThreadPoolExecutor.java:587) bei java.lang.Thread.run (Thread.java:818) verursacht durch: java.lang.SecurityException: Berechtigung verweigert (fehlende INTERNET Erlaubnis?) bei java.net.InetAddress.lookupHostByName (InetAddress.java:451) bei java.net.InetAddress.getAllByNameImpl (InetAddress.java:252) bei java.net.InetAddress.getAllByName (InetAddress. java: 215) bei com.android.okhttp.HostResolver $ 1.getAllByName (HostResolver.java:29) bei com.android.okhttp.internal.http.RouteSelector.resetNextInetSocketAddress (RouteSelector.java:232) bei com.android .okhttp.internal.http.RouteSelector.next (RouteSelector.java:124) bei com.android.okhttp.internal.http.HttpEngine.connect (HttpEngine.java:370) bei com.android.okhttp.internal.http.HttpEngine.sendRequest (HttpEngine.java:298) bei com.android. okhttp.internal.http.HttpURLConnectionImpl.execute (HttpURLConnectionImpl.java:399) bei com.android.okhttp.internal.http.HttpURLConnectionImpl.connect (HttpURLConnectionImpl.java:110) bei com.android.okhttp.internal.http. DelegatingHttpsURLConnection.connect (DelegatingHttpsURLConnection.java:89) unter com.android.okhttp.internal.http.HttpsURLConnectionImpl.connect (HttpsURLConnectionImpl.java:25) unter com.example.dell.api.MainActivity $ JSONTask.doInBackground (MainActivity. Java: 147) bei com.example.dell.api.MainActivity $ JSONTask.doInBack Boden (MainActivity.java:131) bei android.os.AsyncTask $ 2.call (AsyncTask.java:292) bei java.util.concurrent.FutureTask.run (FutureTask.java:237) bei android.os.AsyncTask $ SerialExecutor $ 1.run (AsyncTask.java:231) bei java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1112) bei java.util.concurrent.ThreadPoolExecutor $ Worker.run (ThreadPoolExecutor.java:587) bei java.lang.Thread.run (Thread.java:818)

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Dies ist mein Code:

protected List<MovieModel> doInBackground(String... params) { 
     HttpURLConnection connection = null; 
     BufferedReader reader = null; 

     try { 
      URL url = new URL(params[0]); 
      connection = (HttpURLConnection) url.openConnection(); 
      connection.connect(); 
      InputStream stream = connection.getInputStream(); 
      reader = new BufferedReader(new InputStreamReader(stream)); 
      StringBuffer buffer = new StringBuffer(); 
      String line = ""; 
      while ((line = reader.readLine()) != null) { 
       buffer.append(line); 
      } 

      String finalJson = buffer.toString(); 

      JSONObject parentObject = new JSONObject(finalJson); 
      JSONArray parentArray = parentObject.getJSONArray("movies"); 

      List<MovieModel> movieModelList = new ArrayList<>(); 

      Gson gson = new Gson(); 
      for (int i = 0; i < parentArray.length(); i++) { 
       JSONObject finalObject = parentArray.getJSONObject(i); 
       /** 
       * below single line of code from Gson saves you from writing the json parsing yourself 
       * which is commented below 
       */ 
       MovieModel movieModel = gson.fromJson(finalObject.toString(), MovieModel.class); // a single line json parsing using Gson 
       movieModel.setMovie(finalObject.getString("movie")); 
       movieModel.setYear(finalObject.getInt("year")); 
       movieModel.setRating((float) finalObject.getDouble("rating")); 
       movieModel.setDirector(finalObject.getString("director")); 

       movieModel.setDuration(finalObject.getString("duration")); 
       movieModel.setTagline(finalObject.getString("tagline")); 
       movieModel.setImage(finalObject.getString("image")); 
       movieModel.setStory(finalObject.getString("story")); 

       List<MovieModel.Cast> castList = new ArrayList<>(); 
       for (int j = 0; j < finalObject.getJSONArray("cast").length(); j++) { 
        MovieModel.Cast cast = new MovieModel.Cast(); 
        cast.setName(finalObject.getJSONArray("cast").getJSONObject(j).getString("name")); 
        castList.add(cast); 
       } 
       movieModel.setCastList(castList); 
       // adding the final object in the list 
       movieModelList.add(movieModel); 
      } 
      return movieModelList; 

     } catch (MalformedURLException e) { 
      e.printStackTrace(); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } catch (JSONException e) { 
      e.printStackTrace(); 
     } finally { 
      if (connection != null) { 
       connection.disconnect(); 
      } 
      try { 
       if (reader != null) { 
        reader.close(); 
       } 
      } catch (IOException e) { 
       e.printStackTrace(); 
      } 
     } 
     return null; 
    } 
enter code here 

Answer 1

vergessen haben, INTERNET Erlaubnis zu Ihrem Manifest, in diesem

<uses-permission android:name="android.permission.INTERNET" />