将ListView Row数据添加到另一个ListView并保存? Android

Add ListView Row data to another ListView and save it? Android

我有一个包含歌曲和播放器的 ListView。在我的 ListView 中,我想向 button 添加一个函数以保存 ListView 行并将其添加到不同 Activity(收藏夹 Activity)的不同 ListView 中。我怎样才能做到这一点?

这是我的适配器代码:

public class Adapter extends ArrayAdapter<String> {
    Context context;
    int[] song_icon;
    boolean pausedSamePos = false;
    String[] song_name;
    String[] song_duration;
    String[] song_duration_sb;
    private final int mLcdWidth = 0;
    private final float mDensity = 0;
    public static MediaPlayer mp = new MediaPlayer();
    public static Boolean isPlaying = Boolean.valueOf(false);
    public static int pos = 55;
    Ids holder;
    private final Handler handler = new Handler();
    Runnable updateTimeProgressBar;

    public Adapter(Context c, String[] song_titles, int song_Icons[],
            String[] song_durations) {
        super(c, R.layout.item, R.id.textview_song_duration,
                song_titles);
        this.context = c;
        this.song_icon = song_Icons;
        this.song_name = song_titles;
        this.song_duration = song_durations;
        this.song_duration_sb = song_durations;

    }

    final int[] songPos = { R.raw.song1, R.raw.song2, R.raw.song3,
            R.raw.song4, R.raw.song5, R.raw.song6, R.raw.song7,
            R.raw.song8, R.raw.song9, R.raw.song10,
            R.raw.song11, R.raw.song12, R.raw.song13,
            R.raw.song14, R.raw.song15, R.raw.song16,
            R.raw.song17, R.raw.song18, R.raw.song19,
            R.raw.song20, R.raw.song21, R.raw.song22,
            R.raw.song23, R.raw.song24, R.raw.song25,
            R.raw.song26, R.raw.song27, R.raw.song28,
            R.raw.song29, R.raw.song30, };

    @Override
    public int getViewTypeCount() {

        return getCount();
    }

    @Override
    public int getAdapterViewType(int position) {

        return position;
    }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        View row = convertView;
        holder = null;
        if (row == null) {

            LayoutInflater inflater = (LayoutInflater) context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            row = inflater.inflate(R.layout.item, parent, false);
            holder = new Ids(row);
            row.setTag(holder);
        } else {
            holder = (Ids) row.getTag();

        }

        if (Adapter.isPlaying && Adapter.pos == position) {

            if (pausedSamePos == true) {
                holder.pauseed_play.setVisibility(View.VISIBLE);
                holder.playing_pause.setVisibility(View.GONE);
            } else {
                holder.pauseed_play.setVisibility(View.GONE);
                holder.playing_pause.setVisibility(View.VISIBLE);
            }
            holder.song_currenttime_sb.setVisibility(View.VISIBLE);
            holder.song_duration.setVisibility(View.INVISIBLE);
            holder.song_duration_sb.setVisibility(View.VISIBLE);

            holder.seekbar.setVisibility(View.VISIBLE);
        } else {
            holder.seekbar.setVisibility(View.GONE);
            holder.song_currenttime_sb.setVisibility(View.GONE);
            holder.song_icon.setImageResource(song_icon[position]);
            holder.song_duration_sb.setVisibility(View.INVISIBLE);
            holder.song_duration.setVisibility(View.VISIBLE);
            holder.pauseed_play.setVisibility(View.GONE);
            holder.playing_pause.setVisibility(View.GONE);

        }

        holder.song_name.setText(song_name[position]);
        holder.song_duration.setText(song_duration[position]);

        holder.song_duration_sb.setText(song_duration_sb[position]);
        final Ids finalHolder = holder;


        holder.favorite.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                Toast.makeText(context, "The favorite", Toast.LENGTH_SHORT)
                        .show();

            }

        holder.clickRegister
                .setOnLongClickListener(new View.OnLongClickListener() {

                    @Override
                    public boolean onLongClick(View v) {
                        stopPlaying();
                        return true;
                    }
                });
        finalHolder.song_currenttime_sb.setTag(position);
        holder.seekbar.setFocusable(true);
        holder.seekbar.setTag(position);
        holder.clickRegister.setTag(position);
        holder.song_icon.setTag(position);
        holder.song_name.setTag(position);
        holder.song_duration.setTag(position);
        holder.song_duration_sb.setTag(position);

        int widthSpec = MeasureSpec.makeMeasureSpec(
                (int) (mLcdWidth - 10 * mDensity), MeasureSpec.EXACTLY);
        holder.menu_options.measure(widthSpec, 0);
        LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) holder.menu_options
                .getLayoutParams();
        params.bottomMargin = -holder.menu_options.getMeasuredHeight();
        holder.menu_options.setVisibility(View.GONE);
        return row;
    }

我想要什么 TLDR:要获取 song_name、song_duration、单击行上的 songPos,并保存它,然后使用该数据填充收藏夹中的 ListView Activity。

如果需要更多详细信息,我很乐意提供。

基本上正确的方法是:

1) 创建一个 Song 模型 class 并在此 class

中声明所有必需的属性

2) 扩展 BaseAdapter 并使用 ArrayList<Song> 作为其数据

使用这种方法,您将能够轻松地从单击的行中检索 Song 对象并将其传递到您想要的任何位置。如果您不知道我在说什么,那么您就缺少一些关于 ListView 的基本知识,并且向您抛出代码毫无意义。有很多教程,请查看 this one or that one

有很多方法可以实现这一点,这是我会使用的一种方法 将您的数据(song_name、song_duration、songPos)保存在共享首选项

中的object中

当您转到收藏夹时 activity 阅读您保存的共享首选项

@Override
        public void onClick(View v) {
            Toast.makeText(context, "The favorite", Toast.LENGTH_SHORT)
                    .show();
             //for example get the fav here and save it in object
        YoursongInfoObject yourSongInfoObject=new YoursongInfoObject();
        yourSongInfoObject.name=holder.song_name.getText();
        .
        .
        .
        .
        SharedPreferences prefs = getSharedPreferences(SHARED_PREFS_FILE,  Context.MODE_PRIVATE);
        Editor editor = prefs.edit();
        try {
        editor.putString("YourSongInfoID", ObjectSerializer.serialize(yourSongInfoObject));
        } catch (IOException e) {
        e.printStackTrace();
        }
          editor.commit();
        }

还有你的最爱activity

public void onCreate() {
    super.onCreate();
    if (null == currentFavSong) {
        currentFavSong = new YourSongInfoObject();
    }

    //      load tasks from preference
    SharedPreferences prefs = getSharedPreferences(SHARED_PREFS_FILE, Context.MODE_PRIVATE);

    try {
        currentFavSong = (YourSongInfoObject) ObjectSerializer.deserialize(prefs.getString("YourSongInfoObject", ObjectSerializer.serialize(new YourSongInfoObject())));
    } catch (IOException e) {
        e.printStackTrace();
    } catch (ClassNotFoundException e) {
        e.printStackTrace();
    }
}