近期在做项目的时候碰到了这样一个布局

 

 

 

在android中有种实现折叠list方式是ExpandableListView  但是官方没有ExpandableGridView 

那么怎么样用ExpandableListView来实现一个ExpandableGridView呢

 

大概的原理是：在每个ExpandableListView 中显示一行，用这行来加载一个GridView

口说无凭，贴上代码

1.加载一个ExpandableListView

private SimpleDataAdapter simpleDataAdapter; private ExpandableListView mexpandableListview;        mexpandableListview = (ExpandableListView) findViewById(R.id.expandablelist);        mSuperAdapter = new SuperveseDataExpandableAdapter(this,mSuperveseData);        mexpandableListview.setAdapter(mSuperAdapter);        mexpandableListview.expandGroup(0);　　

　　2.重写BaseExpandableListAdapter

重写BaseExpandableListAdapter，主要是重写getChildView方法 加载一个GridView 动态的计算GridView 高度

@Override    public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {        if (convertView == null) {            convertView = layoutInflater.inflate(R.layout.view, null);        }        CustomGridView gridView = (CustomGridView) convertView .findViewById(R.id.GridView_toolbar);        gridView.setNumColumns(2);        gridView.setHorizontalSpacing(10);        gridView.setGravity(Gravity.CENTER);        GridAdapter adapter = new GridAdapter(context, superveseDatas.get(groupPosition).controlDatas);        gridView.setAdapter(adapter);// Adapter        int totalHeight = 0;       for (int size = 0; size < adapter.getCount(); size++) {            RelativeLayout relativeLayout = (RelativeLayout) adapter.getView(size, null, gridView);            TextView textView = (TextView) relativeLayout.getChildAt(0);            textView.measure(0, 0);            totalHeight += textView.getMeasuredHeight()*2;            if(size == adapter.getCount() -1){                if (size%2 == 0 ){                    totalHeight += textView.getMeasuredHeight()*2;                }            }        }        gridView.SetHeight(totalHeight);        return convertView;    }

　　另外一个地方也需要注意下：

getChildrenCount返回1 因为用一个Item 来加载GridView

@Override    public int getChildrenCount(int groupPosition) {        return  1;    }

　　

 

最后实现的效果如下