Android ScrollView 和ListView 一起使用的问题汇总

1.ScrollView 嵌套 ListView  ，touch事件的截获问题。

参考 http://www.cnblogs.com/lqminn/archive/2013/03/02/2940194.html
http://blog.csdn.net/chaihuasong/article/details/17499799

_scrollView.requestDisallowInterceptTouchEvent(true);

这句话的意思是告诉scrollView,滚动的事件交给我处理。用完以后记得还回去

_scrollView.requestDisallowInterceptTouchEvent(false);

如果不设置回去，ScrollView将无法滚动了。

 

2.ScrollView 滚动时，ListView的第一个条目是否处于显示状态？

参考 http://stackoverflow.com/questions/4628800/android-how-to-check-if-a-view-inside-of-scrollview-is-visible

boolean checkNeedRefresh() {
        Rect scrollBounds = new Rect();
        View firstChild = listView.getChildAt(0);
        _scrollView.getHitRect(scrollBounds);
        if (firstChild.getLocalVisibleRect(scrollBounds)) {
            // Any portion of the firstChild, even a single pixel, is within the
            // visible window
            return true;
        } else {
            // NONE of the firstChild is within the visible window
            return false;
        }
    }

 

3. listView不能显示完整

参考 http://blog.csdn.net/hahashui123/article/details/39177057
http://blog.csdn.net/solomonxiang/article/details/26507145

public static void setListViewHeight(ListView listView) {
        try {
            int totalHeight = 0;
            ListAdapter adapter = listView.getAdapter();
            for (int i = 0, len = adapter.getCount(); i < len; i++) { // listAdapter.getCount()
                View listItem = adapter.getView(i, null, listView);
                listItem.setLayoutParams(new LayoutParams(
                        LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));

                listItem.measure(0, 0); 
                totalHeight += listItem.getMeasuredHeight(); 
            }

            ViewGroup.LayoutParams params = listView.getLayoutParams();
            params.height = totalHeight
                    + (listView.getDividerHeight() * (listView.getCount() - 1));
            listView.setLayoutParams(params);
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

顺带GridView

public static void setGridViewHeight(GridView gridView, int numColumns) {
        try {
            ListAdapter adapter = gridView.getAdapter();
            int row = 3;
            View listItem = adapter.getView(0, null, gridView);
            if (listItem == null)
                return;
            listItem.setLayoutParams(new LayoutParams(
                    LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
            listItem.measure(0, 0); 
            int totalHeight = listItem.getMeasuredHeight() * row
                    + (gridView.getVerticalSpacing() * (row - 1));
            ViewGroup.LayoutParams params = gridView.getLayoutParams();
            params.height = totalHeight;
            gridView.setLayoutParams(params);
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

 如果ListView 带有BottomView

public static void setListViewHeight(ListView listView) {
        try {
            int totalHeight = 0;
            int bottomHeight = 0;
            ListAdapter dataAdapter = null;
            int totalItems = 0;
            ListAdapter adapter = listView.getAdapter();
            if (adapter instanceof HeaderViewListAdapter) {
                HeaderViewListAdapter headerViewListAdapter = ((HeaderViewListAdapter) adapter);
                dataAdapter = headerViewListAdapter.getWrappedAdapter();
                totalItems = dataAdapter.getCount();
                int allItems = headerViewListAdapter.getCount();
                View bottomItem = headerViewListAdapter.getView(allItems - 1,
                        null, listView);
                bottomItem.measure(0, 0);
                bottomHeight = bottomItem.getMeasuredHeight();

            } else {
                dataAdapter = adapter;
            }

            for (int i = 0, len = totalItems; i < len; i++) {
                View listItem = dataAdapter.getView(i, null, listView);
                listItem.setLayoutParams(new LayoutParams(
                        LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));

                listItem.measure(0, 0);
                totalHeight += listItem.getMeasuredHeight();
            }

            int listviewCount = listView.getCount();
            int height = totalHeight
                    + (listView.getDividerHeight() * listviewCount + 1)
                    + bottomHeight;

            ViewGroup.LayoutParams params = listView.getLayoutParams();
            params.height = height;
            listView.setLayoutParams(params);
            listView.requestLayout();
             
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

 

4. 其他，自定义控件实现ListView

http://www.cnblogs.com/lesliefang/p/3587154.html 

 5. 发现 每次加载完成后，listview总是滚到 屏幕最上方，实际上listview上面还有东西被盖住了，解决办法如下

  <ScrollView
        android:id="@+id/scrollView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:descendantFocusability="blocksDescendants"
            android:orientation="vertical" >

最关键的一句， 找到srcollview的 内容控件，一般是 LinearLayout，加上属性  android:descendantFocusability="blocksDescendants"
就可以了。