爪哇 - 使用畢加索爲獲得圖像從URL以JSON - androidstudio

Question

我使用JSON請求文本，並把它與自定義適配器列表視圖，這是我到目前爲止的代碼..

private class getMovies extends AsyncTask<Void, Void, Void> { 

    @Override 
    protected void onPreExecute() { 
     super.onPreExecute(); 
     // Showing progress dialog 
     pDialog = new ProgressDialog(alrehabfilms.this); 
     pDialog.setMessage("Please wait..."); 
     pDialog.setCancelable(false); 
     pDialog.show(); 

    } 

    @Override 
    protected Void doInBackground(Void... arg0) { 
     http sh = new http(); 

     // Making a request to url and getting response 
     String jsonStr = sh.makeServiceCall(url); 

     // Log.e(TAG, "Response from url: " + jsonStr); 

     if (jsonStr != null) { 
      try { 
       JSONObject jsonObj = new JSONObject(jsonStr); 

       // Getting JSON Array node 
       JSONArray moviesp90 = jsonObj.getJSONArray("moviesalrehab"); 

       // looping through All Contacts 
       for (int i = 0; i < moviesp90.length(); i++) { 
        JSONObject c = moviesp90.getJSONObject(i); 

        String id = c.getString("id"); 
        String name = c.getString("name"); 
        String actors = c.getString("actors"); 
        String tandp = c.getString("prizeandtime"); 
        String img = c.getString("img"); //here is for the image 



        // Phone node is JSON Object 
        JSONObject pref = c.getJSONObject("pref"); 
        String imrating = pref.getString("imrating"); 
        String genre = pref.getString("genre"); 
        String guide = pref.getString("guide"); 
        String director = pref.getString("director"); 

        // tmp hash map for single contact 
        HashMap<String, String> movie = new HashMap<>(); 

        // adding each child node to HashMap key => value 
        movie.put("id", id); 
        movie.put("name", name); 
        movie.put("actors", actors); 
        movie.put("prizeandtime", tandp); 
        if(img != null && !img.equalsIgnoreCase(""))       Picasso.with(alrehabfilms.this).load(img).into(imggg); //here idk how to put like movie.put("img", Picasso code) 
        movie.put("imrating", imrating); 
        movie.put("genre", genre); 
        movie.put("guide", guide); 
        movie.put("director", director); 

        // adding contact to contact list 
        alrehabmovieList.add(movie); 
       } 
      } catch (final JSONException e) { 
       // Log.e(TAG, "Json parsing error: " + e.getMessage()); 
       runOnUiThread(new Runnable() { 
        @Override 
        public void run() { 
         Toast.makeText(getApplicationContext(), 
           "An error happened, please try again!", 
           Toast.LENGTH_LONG) 
           .show(); 
        } 
       }); 

      } 
     } else { 
      //  Log.e(TAG, "Couldn't get json from server."); 
      runOnUiThread(new Runnable() { 
       @Override 
       public void run() { 
        Toast.makeText(getApplicationContext(), 
          "Failed to retrieve data, please check your internet connection", 
          Toast.LENGTH_LONG) 
          .show(); 

        AlertDialog.Builder adb = new AlertDialog.Builder(alrehabfilms.this); 




        adb.setTitle("No internet connection"); 



        adb.setMessage("Would you like to try to gather data again?"); 
        adb.setPositiveButton("Yes", new DialogInterface.OnClickListener() { 
         public void onClick(DialogInterface dialog, int which) { 
          new getMovies().execute(); 


         } }); 


        adb.setNegativeButton("Cancel", new DialogInterface.OnClickListener() { 
         public void onClick(DialogInterface dialog, int which) { 

          finish(); 
         } }); 
        adb.show(); 
       } 
      }); 

     } 

     return null; 
    } 


    @Override 
    protected void onPostExecute(Void result) { 
     super.onPostExecute(result); 
     // Dismiss the progress dialog 
     if (pDialog.isShowing()) 
      pDialog.dismiss(); 
     /** 
     * Updating parsed JSON data into ListView 
     * */ 
     ListAdapter adapter = new SimpleAdapter(
       alrehabfilms.this, alrehabmovieList, 
       R.layout.imgtest, new String[]{"name", "actors", 
       "prizeandtime", "img", "imrating", "genre","guide", "director"}, new int[]{R.id.movieName, 
       R.id.movieActors, R.id.moviePrizeAndTime, R.id.imggg//imageeview, R.id.movieRating, R.id.movieGenre,R.id.pGuid, R.id.dir}); 

     lv.setAdapter(adapter); 
    } 


} 

}

正如你看到這裏，我把這個線的圖像

String img = c.getString("img"); //here is for the image 

我在這裏的問題是如何把它以這種方式

movie.put("img", THECODEIWANT); 

，而不是這個，

if(img != null && !img.equalsIgnoreCase("")) 
         Picasso.with(alrehabfilms.this).load(img).into(imggg); 

在此先感謝

Answer 1

爲什麼你想直接把圖像數組中？

你可以做到這一點，但它會阻止你的應用程序，而它會從畢加索獲得真實的位圖圖像數據。

這就是爲什麼我們使用畢加索異步加載後臺線程中的圖像。