ScrollView嵌套ListView问题解决方案

两种方案

1.根据item计算listView高度

两个方法，第一个是计算竖向listview，第二个计算横向lisTVIEW

public class ListViewMeasureHeight {
  /**
   * 测量竖向ListView的高度
   */
  public static void setListViewHeight(ListView listView,int DividerHeight) {
    Adapter listAdapter = listView.getAdapter();

    if (listAdapter == null) {
      // pre-condition
      return;
    }

    int totalHeight = 0;
    for (int i = 0; i < listAdapter.getCount(); i++) {
      View listItem = listAdapter.getView(i, null, listView);
      listItem.measure(0, 0);
      totalHeight += listItem.getMeasuredHeight();
    }

    ViewGroup.LayoutParams params = listView.getLayoutParams();
    params.height = totalHeight + (DividerHeight * (listAdapter.getCount() - 1));
    listView.setLayoutParams(params);
  }
  /**
   * 测量横向ListView的高度
   * @param listView
   */
  public static void setHorizontalListViewHeight(HorizontalListView listView) {
    Adapter listAdapter = listView.getAdapter();

    if (listAdapter == null) {
      // pre-condition
      return;
    }
    View listItem = listAdapter.getView(0, null, listView);
    listItem.measure(0, 0);
    int totalHeight = listItem.getMeasuredHeight();

    ViewGroup.LayoutParams params = listView.getLayoutParams();
    params.height = totalHeight;
    listView.setLayoutParams(params);
  }
}

子ListView的每个Item必须是LinearLayout，不能是其他的，因为其他的Layout(如RelativeLayout)没有重写onMeasure()，所以会在onMeasure()时抛出异常。

2。重写onMeasure（）方法

public class NewListView extends ListView {

  public SpreadListView(Context context) {
    super(context);
  }

  public SpreadListView(Context context, AttributeSet attrs) {
    super(context, attrs);
  }

  public SpreadListView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
  }

  @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);
    super.onMeasure(widthMeasureSpec, expandSpec);
  }
}