如何从列表视图中删除不必要的值？

Question

我无法删除这两个前两个值，我正在从res文件夹中读取mp3文件并在此处显示。最后三个文件是歌曲的名称，但不需要前两个。帮助我如何删除它们。这是我的代码，因为我正在从res读取值并向ListView显示然后播放该音频：

public class MainActivity extends AppCompatActivity {

    ArrayList<String> songNames;
    MediaPlayer mediaPlayer;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ListView listView = (ListView) findViewById(R.id.Mylistview);
        songNames = new ArrayList<String>();

        final ArrayList<String> list = new ArrayList<String>();

        Field[] fields = R.raw.class.getFields();
        list.clear();
        for(Field f : fields)
            try {

                list.add(f.getName());
            } catch (IllegalArgumentException e) {
                e.printStackTrace();
            }

                //     songNames.add(getResources().getClass(R.raw.song1));
                //  songNames.add(getResources().getResourceEntryName(R.raw.song2));
                // songNames.add(getResources().getResourceEntryName(R.raw.song3));


                final ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, list);

                listView.setAdapter(arrayAdapter);

                listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                    @Override
                    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                        Uri mp3 = Uri.parse("android.resource://"
                                + getApplicationContext().getPackageName() + "/raw/"
                                + list.get(position));
                        mediaPlayer = new MediaPlayer();
                        mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
                        try {
                            mediaPlayer.setDataSource(getApplicationContext(),mp3);
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                        try {
                            mediaPlayer.prepare(); // might take long! (for buffering, etc)
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                        mediaPlayer.start();
                        mediaPlayer.setOnCompletionListener(onCompletionListener);

                    }
                });

            }

    private MediaPlayer.OnCompletionListener onCompletionListener = new MediaPlayer.OnCompletionListener() {

        @Override
        public void onCompletion(MediaPlayer mp) {
            // TODO Auto-generated method stub
            mediaPlayer.release();
            mediaPlayer = null;
        }
    };

}

Answer 1

而不是for (Field f : fields)，只需写下：

for (int i = 2; i < fields.length; i++) {
    Field f = fields[i]; 

在try-catch块之后添加一个结束的大括号}。