Android ExpandableGridView的实现

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