Question

我正在尝试在片段内的自定义列表视图中填充mp3文件，而片段又是viewpager的一部分。以下是我想要放置列表视图的片段代码：

public class FragmentSongs extends  Fragment {

    private static final String Sd_Path=new String("/sdcard/");
    private MediaPlayer mp =new MediaPlayer();




    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {


        View view = inflater.inflate(R.layout.fragment_a, container, false);
        ListView SngList = (ListView) view.findViewById(R.id.SongList);

         SongDetails Detail = null ;
         Context _c = null ;



         ArrayList<SongDetails> Songinfo;

         // AdapterView.AdapterContextMenuInfo info;
         Songinfo = new ArrayList<SongDetails>();

         File f=new File("/system/");
         File[] files = f.listFiles(new Mp3Filter());
         if( files.length>0)
         {
              for(int i=0; i<files.length; i++) 
              {Detail.setIcon(R.drawable.ic_launcher);
              Detail.setSong(files[i].getName());
              Detail.setArtist(files[i].getName());
              Detail.setAlbum(files[i].getName());
              Songinfo.add(Detail);

              SngList.setAdapter(new CustomAdapter(Songinfo ));


              }
         }
         else  if (files.length == 0)
             return null;

         return view;


    } 
}

class Mp3Filter implements FilenameFilter{
    public boolean accept(File dir,String name)
    {

        return (name.endsWith(".rc"))|| (name.endsWith(".Mp3")) ||
                      (name.endsWith(".MP3"));//searching for the files
    }
}

Answer 1

if( files.length>0) {
      for(int i=0; i<files.length; i++)  {
          SongDetails detail = new SongDetails();
          detail.setIcon(R.drawable.ic_launcher);
          detail.setSong(files[i].getName());
          detail.setArtist(files[i].getName());
          detail.setAlbum(files[i].getName());
          Songinfo.add(detail);
       }
     SngList.setAdapter(new CustomAdapter(Songinfo ));
 }

在for循环中，有两件事是错误的。您在每次迭代时创建的第一个新CustomAdapter。当循环用完时，Yoph应该创建并设置它。第二个错误是你在每次迭代时都会覆盖Detail的值。您应该在每次迭代时创建一个新的Detail对象

customlistview没有填充我想要的文件列表？

1 个答案: