ScrollView 与 LiswView 共存时显示高度计算问题-优快云博客

本文详细介绍了如何在Android中自定义ListView并实现高度基于子项调整的功能，包括使用makeMeasureSpec方法设置expandSpec，以及在页面加载后通过setListViewHeightBasedOnChildren方法计算并设置ListView的实际高度。

2019独角兽企业重金招聘Python工程师标准>>>

首先自定义ListView重写onMeasure方法

protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
		// TODO Auto-generated method stub
		int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,  
	            MeasureSpec.AT_MOST);  
		super.onMeasure(widthMeasureSpec, expandSpec);
	}

在Activity中等页面加载结束后调用下面这个方法 setListViewHeightBasedOnChildren

public static void setListViewHeightBasedOnChildren(ListView listView) {
		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);
	}

页面显示后，可能自动滑动到最下方，如不需要可这样

mHandler.postDelayed(new Runnable() {

			@Override
			public void run() {
				// TODO Auto-generated method stub
				scroll.scrollTo(10, 10);
			}
		}, 100);

转载于:https://my.oschina.net/yuhanxun/blog/165446