了java.lang.RuntimeException：發生錯誤而執行doInBackground（

過程：com.example.dell.api，PID：22968 了java.lang.RuntimeException：執行doInBackground（）在機器人發生錯誤。（FutureTask.java：222）在java.util.concurrent.FutureTask.run（FutureTask.java:242） at android.os.AsyncTask $ SerialExecutor $ 1.run（AsyncTask.java:231） at java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor。 java的：1 112） at java.util.concurrent.ThreadPoolExecutor $ Worker.run（ThreadPoolExecutor.java:587） at java.lang.Thread.run（Thread.java:818）引起：java.lang.SecurityException：權限被拒絕（缺少INTERNET權限？） at java.net.InetAddress.lookupHostByName（InetAddress.java:451） at java.net.InetAddress.getAllByNameImpl（InetAddress.java:252） at java.net.InetAddress.getAllByName（InetAddress。 java：215） at com.android.okhttp.HostResolver $ 1.getAllByName（HostResolver.java:29） at com.android.okhttp.internal.http.RouteSelector.resetNextInetSocketAddress（RouteSelector.java:232） at com.android .okhttp.internal.http.RouteSelector.next（RouteSelector.java:124）在com.android.okhttp.internal.http.HttpEngine.connect（HttpEngine.java:370）在com.android.okhttp.internal.http.HttpEngine.sendRequest（HttpEngine.java:298）在com.android。 okhttp.internal.http.HttpURLConnectionImpl.execute（HttpURLConnectionImpl.java:399）在com.android.okhttp.internal.http.HttpURLConnectionImpl.connect（HttpURLConnectionImpl.java:110）在com.android.okhttp.internal.http。 DelegatingHttpsURLConnection.connect（DelegatingHttpsURLConnection.java:89） at com.android.okhttp.internal.http.HttpsURLConnectionImpl.connect（HttpsURLConnectionImpl.java:25） at com.example.dell.api.MainActivity $ JSONTask.doInBackground（MainActivity。 java：147） at com.example.dell.api.MainActivity $ JSONTask.doInBack android.os.AsyncTask $ 2.call（AsyncTask.java:292） at java.util.concurrent.FutureTask.run（FutureTask.java:237） at android.os.AsyncTask（MainActivity.java:131） at android.os.AsyncTask $ SerialExecutor $ 1.run（AsyncTask.java:231）在java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1112）在java.util.concurrent.ThreadPoolExecutor中的$ Worker.run（ThreadPoolExecutor.java:587）在java.lang.Thread.run（Thread.java:818）了java.lang.RuntimeException：發生錯誤而執行doInBackground（

這是我的代碼：

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

來源

2017-07-25 Sajjad Ali

'產生的原因：java.lang.SecurityException異常：（？缺少INTERNET許可）許可被拒絕' – fluffyBatman

你忘了INTERNET權限添加到您的清單，在這個

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

來源

2017-07-25 13:41:25

了java.lang.RuntimeException：發生錯誤而執行doInBackground（

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