andorid ListView和GirdView 与ScrollView 冲突

1.listview解决方法

public static void setListViewHeightBasedOnChildren(ListView listView) {
    if(listView == null) return;
    ListAdapter 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 + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
    listView.setLayoutParams(params);
}

2.gridview解决方法

 public static void setGridViewHeightBasedOnChildren(GridView gridView){
        // 获取listview的adapter
        ListAdapter listAdapter = gridView.getAdapter();
        if (listAdapter == null) {
            return;
        }
        // 固定列宽，有多少列
        int col = 3; //gridView.getNumColumns();
        int totalHeight = 0;
        // i每次加4，相当于listAdapter.getCount()小于等于4时 循环一次，计算一次item的高度，
        // listAdapter.getCount()小于等于8时计算两次高度相加
        for (int i = 0; i < listAdapter.getCount(); i += col) {
            // 获取listview的每一个item
            View listItem = listAdapter.getView(i, null, gridView);
            listItem.measure(0, 0);
            // 获取item的高度和
            totalHeight += listItem.getMeasuredHeight();
        }

        // 获取listview的布局参数
        ViewGroup.LayoutParams params = gridView.getLayoutParams();
        // 设置高度
        params.height = totalHeight+20;
        // 设置margin
        ((ViewGroup.MarginLayoutParams) params).setMargins(10, 10, 10, 10);
        // 设置参数
        gridView.setLayoutParams(params);
    }

3.自定义ListView

public class CustomListView extends ListView {
    public CustomListView(Context context) {
        super(context);
    }

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

    public CustomListView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }
    @Override
    public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
                 int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,
                                 MeasureSpec.AT_MOST);
                 super.onMeasure(widthMeasureSpec, expandSpec);
             }

}