android - 使用 Aquery 的带有复选框的歌曲列表视图在列表向下滚动时无法保存复选框的状态？

Question

嗨，我有使用 Aquery 的复选框的歌曲列表视图，我无法在列表滚动时保存复选框的状态。我有两个arraylist，一个用于单击歌曲图像，另一个用于复选框，如果用户选择它应该根据复选框arraylist播放歌曲的复选框。我也用过这个 check.setChecked(SelectedBox.get(clickedposition).getisCheck()); . 但没有帮助

到目前为止我所做的是在这里

private void createList() {
        listAq = new AQuery(this);
        adapter = new ArrayAdapter<Audio>(SongList.this, R.layout.list_row,details) {
            @Override
            public  View getView(final int position, View convertView,final ViewGroup parent) {
                if (convertView == null) {
                    convertView = getLayoutInflater().inflate(R.layout.list_row, parent, false);
                }
                final int clickedposition = position;
                final AQuery aq = listAq.recycle(convertView);
                Audio item = getItem(position);
                aq.id(R.id.MovieName).text(item.getAlbumName());
                aq.id(R.id.SongName).text(item.getTitle());
                aq.id(R.id.checkBox1).getCheckBox().setSelected(item.getisCheck());
                aq.id(R.id.nameLayout).clicked(new OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        DialogBuilder(position);
                    }
                });
                 check = (CheckBox) convertView.findViewById(R.id.checkBox1);

                check.setOnCheckedChangeListener(new OnCheckedChangeListener() {
                    @Override
                    public void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {
                        try {
                            if (isChecked) {
                                checkbox = true;
                                if (details.get(clickedposition).getisCheck() == false) {
                                SelectedBox.add(details.get(clickedposition));
                                System.out.println(SelectedBox.size());
                                details.get(clickedposition).setisCheck(true);
                                }
                            } else {
                                final String name = details.get(clickedposition).getFilename();
                    for (int i = 0; i <= SelectedBox.size(); i++) {
                    if (name.equals(SelectedBox.get(i).getFilename())) {
                                    SelectedBox.remove(i);
                                    details.get(clickedposition).setisCheck(false);

                                    }
                                }
                            }

                            notifyDataSetChanged();
                        }

                        catch (Exception e) {

                            e.getMessage();
                        }
                    }

                });
            try{

            }
            catch (Exception e) {
                // TODO: handle exception
            }
                url = "drawable/" + item.getThumbnail();
                imageResource = getResources().getIdentifier(url, null,getPackageName());
                aq.id(R.id.song_image).image(imageResource);
                if (position != playingValue) {
                    aq.id(R.id.imageplay).invisible();
                    aq.id(R.id.imageplay).getImageView().bringToFront();
                } else {
                    aq.id(R.id.imageplay).visible();
                }
                ImageView img = (ImageView)convertView.findViewById(R.id.song_image);
                img.setOnClickListener(new OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        checkbox = false;
                        SelectedBox.clear();
                        currentSongIndex = position;
                        try {
                            if (ChannelService.playerFlag == 0) {
                                playSong(currentSongIndex);
                            } else if ((ChannelService.playerFlag == 1)
                                    || ((ChannelService.playerFlag == 2))) {
                                if (currentSongIndex != playingValue) {
                                    try {
                                        final Intent serviceIntent = new Intent(
                                                getApplicationContext(),
                                                ChannelService.class);
                                        stopService(serviceIntent);
                                        mPlay.setBackgroundResource(R.drawable.play_btn);
                                        playSong(currentSongIndex);
                                    } catch (final IllegalStateException e) {
                                        e.printStackTrace();
                                    }
                                }
                                mPlay.setBackgroundResource(R.drawable.pause_btn);
                                final Intent in = new Intent("updateNotification");
                                sendBroadcast(in);
                            }
                        } catch (final IllegalStateException e) {
                            e.getMessage();
                        }
                        notifyDataSetChanged();
                    }
                });

                return convertView;

            }

        };

        aq.id(R.id.listView1).adapter(adapter);

    }

Answer 1

当您在 Android 中向下滚动列表时，它会破坏不适合屏幕的行。我总是使用一个对象数组来保存每一行的状态，所以当 android 调用 getView 时，你可以询问它们的状态：

 public class AudioRow{
        public int  id;
        public boolean checked;
        ...
    }

然后在 getView 你可以做这样的事情：

public  View getView(final int position, View convertView,final ViewGroup parent) {
                if (convertView == null) {
                    convertView = getLayoutInflater().inflate(R.layout.list_row, parent, false);
                }
                final int clickedposition = position;
                AudioRow ar = audioRows.get(position);
                if(ar.checked) {
                     //do something;
                }
                 ...                    

                    @Override
                    public void onClick(View v) {
                        if(ar.checked) ar.checked = false;
                        else ar.checked = true;
                        DialogBuilder(position);
                    }
                });

我希望它对你有帮助。