在ListView中点击物品时播放声音

Question

所以我试图在按下一个项目或一行ListView时播放声音。我正在使用此代码：

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(); 
       } 
      } 
     }); 

并获得空指针异常。 Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.Window$Callback android.view.Window.getCallback()' on a null object reference

我在做什么错？

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(); 
       } 
       } 
      });