Question

我有这样的清单项目

Unlock image

当我单击此列表项的锁定图像时，该图像将转换为该图像

Locked image

它正在工作，并且按预期方式更改了当前列表项的图像，但是问题在于，这也是由于回收列表视图而更改了其他行的图像。https://stackoverflow.com/a/14108676/5989049 所以我能做些什么，使该项目在图像上单击仅影响被单击的行。

这是我的适配器代码

public class WordAdapter extends ArrayAdapter<Word> {

public WordAdapter(Activity context, ArrayList<Word> words) {
    super(context, 0, words);
}

@Override
public View getView(final int position, @Nullable final View convertView, @NonNull final ViewGroup parent) {
    View listItem = convertView;
    if (listItem == null) {
        listItem = LayoutInflater.from(getContext()).inflate(
                R.layout.list_item, parent, false);
    }
    final Word word = getItem(position);
    String englishWord = null;
    if (word != null) {
        englishWord = word.getEnglishWord();
    }
    String arabicWord = null;
    if (word != null) {
        arabicWord = word.getArabicWord();
    }

    TextView englishText = listItem.findViewById(R.id.english_text_view);
    TextView arabicText = listItem.findViewById(R.id.arabic_text_view);
    ImageView mUnLocked = listItem.findViewById(R.id.unlock);
    mUnLocked.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            if (!word.isLocked()) {
                word.setLocked(true);
                ImageView icon = (ImageView) view;
                icon.setImageResource(R.drawable.ic_lock_outline_black_24dp);
                icon.setVisibility(View.VISIBLE);
            } else {
                ImageView icon = (ImageView) view;
                icon.setImageResource(R.drawable.ic_lock_open_black_24dp);
                icon.setVisibility(View.VISIBLE);
            }

        }
    });
    Typeface enTypeface = Typeface.createFromAsset(getContext().getAssets(), "fonts/fontfamily.ttf");
    Typeface arTypeface = Typeface.createFromAsset(getContext().getAssets(), "fonts/ShahdRegular.ttf");
    englishText.setTypeface(enTypeface);
    arabicText.setTypeface(arTypeface);
    englishText.setText(englishWord);
    arabicText.setText(arabicWord);
    return listItem;
}

}

Answer 1

您将需要在列表适配器模型中保留标志“ isLocked”。例如，在适配器中，您应该有一个数据列表，比方说A类。

在A类中添加一个布尔isLocked。

现在在列表中，在onClick侦听器中切换此标志的值，然后根据该标志选择正确的图像资源。

编辑：基于您的适配器：

    public class WordAdapter extends ArrayAdapter<Word> {

    public WordAdapter(Activity context, ArrayList<Word> words) {
        super(context, 0, words);
    }

    @Override
    public View getView(final int position, @Nullable final View convertView, @NonNull final ViewGroup parent) {
        View listItem = convertView;
        if (listItem == null) {
            listItem = LayoutInflater.from(getContext()).inflate(
                    R.layout.list_item, parent, false);
        }
        final Word word = getItem(position);
        String englishWord = null;
        if (word != null) {
            englishWord = word.getEnglishWord();
        }
        String arabicWord = null;
        if (word != null) {
            arabicWord = word.getArabicWord();
        }

        TextView englishText = listItem.findViewById(R.id.english_text_view);
        TextView arabicText = listItem.findViewById(R.id.arabic_text_view);
        ImageView mUnLocked = listItem.findViewById(R.id.unlock);

if (!word.isLocked()) {
                    word.setLocked(true);
                    ImageView icon = (ImageView) view;
                    icon.setImageResource(R.drawable.ic_lock_outline_black_24dp);
                    icon.setVisibility(View.VISIBLE);
                } else {
                    ImageView icon = (ImageView) view;
                    icon.setImageResource(R.drawable.ic_lock_open_black_24dp);
                    icon.setVisibility(View.VISIBLE);
                }

        mUnLocked.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (!word.isLocked()) {
                    word.setLocked(true);
                    ImageView icon = (ImageView) view;
                    icon.setImageResource(R.drawable.ic_lock_outline_black_24dp);
                    icon.setVisibility(View.VISIBLE);
                } else {
                    ImageView icon = (ImageView) view;
                    icon.setImageResource(R.drawable.ic_lock_open_black_24dp);
                    icon.setVisibility(View.VISIBLE);
                }

            }
        });
        Typeface enTypeface = Typeface.createFromAsset(getContext().getAssets(), "fonts/fontfamily.ttf");
        Typeface arTypeface = Typeface.createFromAsset(getContext().getAssets(), "fonts/ShahdRegular.ttf");
        englishText.setTypeface(enTypeface);
        arabicText.setTypeface(arTypeface);
        englishText.setText(englishWord);
        arabicText.setText(arabicWord);
        return listItem;
    }
    }

android列表项单击会影响列表视图中的其他行

1 个答案: