Question

ExpandableListView的getChildView最初是从arraylist中读取的文本列表中膨胀的。如果选择了某个项目（单选模式），那么我想将子视图更改为自定义视图，例如图像。

@Override
    public View getChildView(int groupPosition, int childPosition,
            boolean isLastChild, View convertView, ViewGroup parent) {

        if (convertView != null) {
            Log.e("EffectsAdapter", "convertView != null");
            if (getClicked(groupPosition, childPosition)) {
                Log.e(TAG, "getClicked true");
                CustomView cv= new CustomView (mInflator.getContext());
                cv.setLayoutParams(new AbsListView.LayoutParams(AbsListView.LayoutParams.MATCH_PARENT, AbsListView.LayoutParams.MATCH_PARENT));

        //      ProgressBar pgbar = (ProgressBar)convertView.findViewById(R.id.progressBar1);
                return cv;//convertView;

            }
            convertView = mInflator.inflate(R.layout.lv_child, null);

        }

如果我在 xml 中使用CustomView，包含在LinearLayout中，那么高度和重量都是WRAP_CONTENT

但是如果像上面的代码一样实例化，视图的onSizeChanged总是会收到高度为零，为什么？

protected void onSizeChanged(int width, int height, int oldwid, int oldhght) {
        Log.e(TAG,"onsizeChanged w = "+String.valueOf(width)+" h= "+String.valueOf(height)
                +"oldw = "+String.valueOf(oldwid)+" oldh = "+String.valueOf(oldhght));
        mWidth = width;
        mHeight = height;
        // initialize();
    }

Answer 1

同样的事发生在我身上。我通过在layout的xml中将视图的layout_height从wrap_content更改为match_parent来修复它

Android可扩展列表视图自定义子视图onSizeChanged始终为零

1 个答案: