复选框状态不变后滚动，它将成为相同的Android

Question

创建一个带有复选框的列表视图。我在列表中遇到了一个问题，当我选择任何复选框时，当我向下滚动列表时，该复选框本身就没有被选中。

下面是我的代码片段:

public class HomeListAdapter extends ArrayAdapter<HashMap<String, Object> > {

    boolean[] itemChecked;
    //
    private ImageLoadingListener animateFirstListener = new AnimateFirstDisplayListener();

    private DisplayImageOptions options;
    private CheckBox check;
    public HomeListAdapter(Context context, ArrayList<HashMap<String, Object>> dataMap) {
            super(context, 0, dataMap);
            itemChecked = new boolean[dataMap.size()];
            options = new DisplayImageOptions.Builder()
                    .showImageOnLoading(R.drawable.com_facebook_profile_picture_blank_square)
                    .showImageForEmptyUri(R.drawable.com_facebook_profile_picture_blank_square)
                    .showImageOnFail(R.drawable.com_facebook_profile_picture_blank_square)
                    .cacheInMemory(true)
                    .cacheOnDisk(true)
                    .considerExifParams(true)
                    .displayer(new RoundedBitmapDisplayer(20)).build();
           this.notifyDataSetChanged();
        }
        @Override
        public View getView(final int position, View convertView, ViewGroup parent) {
            ViewHolder holder = null;
            HashMap<String, Object> dataMap = getItem(position);
            if (convertView == null) {
                convertView = LayoutInflater.from(getContext()).inflate(R.layout.list_item1, parent, false);
            }

            TextView description = (TextView) convertView.findViewById(R.id.description);
            description.setText(dataMap.get(Home1.TAG_CNAME).toString());
            TextView email = (TextView) convertView.findViewById(R.id.company);
            email.setText(dataMap.get(Home1.TAG_EMAIL).toString());
          check= (CheckBox) convertView.findViewById(R.id.ck);

            check.setTag(getPosition(dataMap));
            check.setChecked(true);

           check.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
    @Override
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
        int getPosition = (Integer) buttonView.getTag();

    }
});
            if (dataMap.get(Home1.TAG_LIKE).toString().equals("true")) {
                check.setChecked(true);
            }else{
                check.setChecked(false);
            }

            ImageView logo = (ImageView) convertView.findViewById(R.id.logo);
            ImageLoader.getInstance().displayImage(dataMap.get(Home1.TAG_IMAGE).toString(),logo, options, animateFirstListener);
            return convertView;
        }

Answer 1

您需要在getView()方法中设置视图的状态。您似乎已经设置了一个数组来存储选中的项目，因此您只需要在onCheckedChanged()方法中int getPosition = (Integer) buttonView.getTag();行之后填充它:

itemChecked[getPosition] = isChecked;

然后，在您的getView()方法中，而不是做:

if (dataMap.get(Home1.TAG_LIKE).toString().equals("true")) {
    check.setChecked(true);
}else{
    check.setChecked(false);
}

你需要使用数组中的值来设置检查状态:

check.setChecked(itemChecked[position]);

如果您需要代码根据dataMap.get(Home1.TAG_LIKE)的值设置被检查项的初始状态，它可能应该在初始化itemChecked之后立即进入构造函数，应该是这样的:

for (int i =0; i < itemChecked.length; ++i) {
    itemChecked[i] = dataMap.get(Home1.TAG_LIKE).toString().equals("true")
}