Question

我正在关注此事 http://velosmobile.com/2013/04/03/enhanced-sectioned-grid-with-varying-columns/ 在我的示例中的教程，但我有每个列表项的复选框。我想检查项目，然后将所有选中的项目发送到另一个活动。

问题是当我滚动listview时，调用自定义适配器的getview（）并更改列表项的位置。用简单的话来说就是

mCheckBox.setOnCheckedChangeListener()

滚动列表视图时会调用

，我不想调用它。以下是我的代码。任何帮助将不胜感激

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    int realPosition = 0;
    int viewsToDraw = 0;
    int rows = 0;
    int totalCount = 0;



    for (int i = 0; i < sectionsCount; ++i)
    {
        int sectionCount = getCountInSection(i);
        totalCount += sectionCount;
        if (sectionCount > 0 && position <= rows + (sectionCount - 1) / colCount)
        {
            realPosition += (position - rows) * colCount;
            viewsToDraw = (int)(totalCount - realPosition);
            break;
        }
        else
        {
            if (sectionCount > 0)
            {
                rows += (int)((sectionCount - 1) / colCount + 1);
            }
            realPosition += sectionCount;
        }
    }
    if (convertView == null)
    {
        convertView = inflater.inflate(rowResID, parent, false);
        if (measuredRow == null && resizeMode == MODE_VARY_COUNT)
        {
            measuredRow = (ViewGroup)convertView;
            // In this mode, we need to learn how wide our row will be, so we can calculate
            // the number of columns to show.
            // This listener will notify us once the layout pass is done and we have our
            // measurements.
            measuredRow.getViewTreeObserver().addOnGlobalLayoutListener(layoutObserver);
        }
    }
    int lastType = -1;
    if (realPosition > 0)
        lastType = getTypeFor(realPosition-1);
    if (getDataCount() > 0)
    {
        TextView header = (TextView)convertView.findViewById(headerID);
        int newType = getTypeFor(realPosition);
        if (newType != lastType)
        {
            header.setVisibility(View.VISIBLE);
            header.setText(getHeaderForSection(newType));

        }
        else
        {
            header.setVisibility(View.GONE);
        }
    }
    customizeRow(position, convertView);

    ViewGroup itemHolder = (ViewGroup)convertView.findViewById(itemHolderID);
    for (int i = 0; i < itemHolder.getChildCount(); ++i)
    {
        View child = itemHolder.getChildAt(i);
        if (i < colCount && i < viewsToDraw && child != null)
        {
            bindView(child, realPosition + i);
            child.setVisibility(View.VISIBLE);
        }
        else if (child != null)
        {
            child.setVisibility(View.INVISIBLE);
        }
    }

    return convertView;
}

bindView（）函数的代码如下

@Override
protected void bindView(View convertView, int position) {
    String title;
    ConfiguredItem myDevice = (ConfiguredItem) getItem(position);

    myDevices.add(myDevice);
    title = myDevice.getTitle();

    TextView label = (TextView) convertView.findViewById(R.id.bookItem_title);
    CheckBox mCheckBox = (CheckBox) convertView.findViewById(R.id.checkBox);

    mCheckBox.setTag(position);
    mCheckBox.setChecked(mSparseBooleanArray.get(position));
    mCheckBox.setOnCheckedChangeListener(mCheckedChangeListener);
    label.setText(title);

    TypedArray imgTitle = myContext.getResources().obtainTypedArray(
            R.array.colors);
    String[] myColors = myContext.getResources().getStringArray(
            R.array.colors);

    int idx = new Random().nextInt(imgTitle.length());
    String random = (myColors[idx]);

    int color = Color.parseColor(random);
    convertView.setBackgroundColor(color);

}

CompoundButton.OnCheckedChangeListener mCheckedChangeListener = new CompoundButton.OnCheckedChangeListener() {
    @Override
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
        mSparseBooleanArray.put((Integer) buttonView.getTag(),
                isChecked);
    }
};

Answer 1

尝试更快的解决方案：删除if (convertView == null) 始终创建新的convertView。这不是一个好习惯，但可以帮助你找到bug。

Answer 2

回收视图很棘手。当您重用视图时，需要重新初始化所有内容。例如，如果您在视图的一个版本中设置复选框的状态，然后在以后重复使用它，则您需要再次设置复选框状态，否则它将具有上次的状态。

我无法从您的代码中了解我是否正在解决您的问题 - 您没有显示成员变量，而且还有很多代码似乎并不存在与单元视图的初始化有关。如果我的解决方案不够充分，请尝试将您提供的代码减少到与问题相关的小部分。

Answer 3

试试这个

mCheckBox.setTag(position);
mCheckBox.setOnCheckedChangeListener(null);
mCheckBox.setChecked(mSparseBooleanArray.get(position));
mCheckBox.setOnCheckedChangeListener(mCheckedChangeListener);

并在你的方法getView中找到复选框并执行相同的操作

mCheckBox.setOnCheckedChangeListener（空）;

带有复选框的分段网格

3 个答案: