如何获取除getView之外的当前数组适配器位置的值

Question

我通过阵列适配器使用cardstack。我正在使用getter setter来显示卡上的数据。但我也用getSongDuration（）恢复了与该卡相关的歌曲的持续时间。问题是当这个加载时，我在getView方法中执行：

songDuration = item.getSongDuration();

并记录该值，对于不同的位置，它被多次调用。

我需要获取当前歌曲的歌曲持续时间的值。通常我会使用更改的通知数据集，但对于这个实例，我看不出它是如何适用的。

这是我的适配器：

  public class SongPreviewCardsDataAdapter extends ArrayAdapter<SongDatabaseMappingAdapter> {

    private Context mContext;

    public SongPreviewCardsDataAdapter(Context context, int resource) {
        super(context, resource);

        mContext = context;

    }

    ImageButton oneStarRating;
    ImageButton twoStarRating;
    ImageButton threeStarRating;
    ImageButton fourStarRating;
    ImageButton fiveStarRating;


    @Override
    public int getCount() {
        return super.getCount();
    }

    @Override
    public View getView(int position, final View contentView, ViewGroup parent) {

       // Initialise Song Views
       final SongDatabaseMappingAdapter item = getItem(position);


        long songDuration = item.getSongDuration();
        Log.d ("Duration", ""+songDuration); 





       TextView songName = (TextView) (contentView.findViewById(R.id.songNameTextView));

       TextView artist_albumName = (TextView) (contentView.findViewById(R.id.artist_albumView));

       com.mikhaellopez.circularimageview.CircularImageView songImage = (CircularImageView) contentView.findViewById(R.id.songImageView);
       String ImageURL = (item.getPictureURL());
       Picasso
                .with(this.getContext())
                .load(ImageURL)
                .into(songImage);

       final CircularProgressBar circularProgressBar = (CircularProgressBar)contentView.findViewById(R.id.songProgresswheel);
       circularProgressBar.setColor(ContextCompat.getColor(getContext(), R.color.darkRed));
       circularProgressBar.setBackgroundColor(ContextCompat.getColor(getContext(), R.color.darkBlueGrey));
       circularProgressBar.setProgressBarWidth(10);
       circularProgressBar.setBackgroundProgressBarWidth(10);

        com.mikhaellopez.circularimageview.CircularImageView imagelocked = (CircularImageView) contentView.findViewById(R.id.lockedImageView);

        // Initialise  Rating Buttons
        oneStarRating = (ImageButton) contentView.findViewById(R.id.ratingButton1);
        twoStarRating = (ImageButton) contentView.findViewById(R.id.ratingButton2);
        threeStarRating = (ImageButton) contentView.findViewById(R.id.ratingButton3);
        fourStarRating = (ImageButton) contentView.findViewById(R.id.ratingButton4);
        fiveStarRating = (ImageButton) contentView.findViewById(R.id.ratingButton5);

        if (item.getOneStarRating()) {
            oneStarRating.setImageResource(R.drawable.starfullnew);
            imagelocked.setVisibility(contentView.GONE);
            artist_albumName.setText(item.getArtist() + " - " + item.getAlbumTitle());
            songName.setText(item.getSongTitle());
            oneStarRating.setClickable(false);
            twoStarRating.setClickable(false);
            threeStarRating.setClickable(false);
            fourStarRating.setClickable(false);
            fiveStarRating.setClickable(false);

        }


        if (item.getTwoStarRating()) {
            oneStarRating.setImageResource(R.drawable.starfullnew);
            twoStarRating.setImageResource(R.drawable.starfullnew);
            imagelocked.setVisibility(contentView.GONE);
            artist_albumName.setText(item.getArtist() + " - " + item.getAlbumTitle());
            songName.setText(item.getSongTitle());
            oneStarRating.setClickable(false);
            twoStarRating.setClickable(false);
            threeStarRating.setClickable(false);
            fourStarRating.setClickable(false);
            fiveStarRating.setClickable(false);

        }

        if (item.getThreeStarRating()) {
            oneStarRating.setImageResource(R.drawable.starfullnew);
            twoStarRating.setImageResource(R.drawable.starfullnew);
            threeStarRating.setImageResource(R.drawable.starfullnew);
            imagelocked.setVisibility(contentView.GONE);
            artist_albumName.setText(item.getArtist() + " - " + item.getAlbumTitle());
            songName.setText(item.getSongTitle());
            oneStarRating.setClickable(false);
            twoStarRating.setClickable(false);
            threeStarRating.setClickable(false);
            fourStarRating.setClickable(false);
            fiveStarRating.setClickable(false);
        }

        if (item.getFourStarRating()) {
            oneStarRating.setImageResource(R.drawable.starfullnew);
            twoStarRating.setImageResource(R.drawable.starfullnew);
            threeStarRating.setImageResource(R.drawable.starfullnew);
            fourStarRating.setImageResource(R.drawable.starfullnew);
            imagelocked.setVisibility(contentView.GONE);
            artist_albumName.setText(item.getArtist() + " - " + item.getAlbumTitle());
            oneStarRating.setClickable(false);
            twoStarRating.setClickable(false);
            threeStarRating.setClickable(false);
            fourStarRating.setClickable(false);
            fiveStarRating.setClickable(false);

        }

        if (item.getFiveStarRating()) {
            oneStarRating.setImageResource(R.drawable.starfullnew);
            twoStarRating.setImageResource(R.drawable.starfullnew);
            threeStarRating.setImageResource(R.drawable.starfullnew);
            fourStarRating.setImageResource(R.drawable.starfullnew);
            fiveStarRating.setImageResource(R.drawable.starfullnew);
            imagelocked.setVisibility(contentView.GONE);
            artist_albumName.setText(item.getArtist() + " - " + item.getAlbumTitle());
            songName.setText(item.getSongTitle());
            oneStarRating.setEnabled(false);
            twoStarRating.setEnabled(false);
            threeStarRating.setEnabled(false);
            fourStarRating.setEnabled(false);
            fiveStarRating.setEnabled(false);

        }

        oneStarRating.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.d("Star", "Star Clicked");
                item.setOneStarRating(true);
                notifyDataSetChanged();
            }
        });


        twoStarRating.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.d("Star", "Star Clicked");
                item.setTwoStarRating(true);
                notifyDataSetChanged();
                DemoPreviewSongFragment.userHasRatedSong = true;
            }
        });

        threeStarRating.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.d("Star", "Star Clicked");
                item.setThreeStarRating(true);
                notifyDataSetChanged();
                DemoPreviewSongFragment.userHasRatedSong = true;

            }
        });

        fourStarRating.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.d("Star", "Star Clicked");
                item.setFourStarRating(true);
                notifyDataSetChanged();
                DemoPreviewSongFragment.userHasRatedSong = true;

            }
        });

        fiveStarRating.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.d("Star", "Star Clicked");
                item.setFiveStarRating(true);
                notifyDataSetChanged();
                DemoPreviewSongFragment.userHasRatedSong = true;
            }
        });

       return contentView;
   }

}