ListViewの項目をタップしたときに音を鳴らす

Question

ListViewの項目または行が押されたときに音を鳴らそうとしています。私はこのコードを使用しています：

listaMjeseci.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
      @Override 
      public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 
       if (position == 0){ 
        MediaPlayer sijecanj = MediaPlayer.create(Mjeseci.this, R.raw.section1_mjeseci_sijecanj); 
        sijecanj.start(); 
       } 
      } 
     }); 

とNULLポインタ例外を取得しています。 Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.Window$Callback android.view.Window.getCallback()' on a null object reference

私は間違っていますか？

Answer 1

listView.setOnItemClickListener(new OnItemClickListener() { 
       @Override 
       public void onItemClick(AdapterView<?> parent, View view, 
         int position, long id) { 
         if (position == 0) 
         { 
        MediaPlayer sijecanj = MediaPlayer.create(Mjeseci.this, R.raw.section1_mjeseci_sijecanj); 
        sijecanj.start(); 
       } 
       } 
      });