RecyclerView用多层级TreeView，如果层级比较少推荐使用Brvah。直接上图
引入：
allprojects {
repositories {
...
maven { url 'https://jitpack.io' }
}
}
dependencies {
compile 'com.github.pye52:TreeView:0.2.3'
}Json例子结构
[
{
"id": 1,
"title": "A1",
"pid": 0
},
{
"id": 2,
"title": "B1",
"pid": 1
},
{
"id": 3,
"title": "C1",
"pid": 2
},
{
"id": 4,
"title": "C2",
"pid": 2
},
{
"id": 5,
"title": "C3",
"pid": 2
},
{
"id": 6,
"title": "B2",
"pid": 1
},
{
"id": 7,
"title": "C4",
"pid": 6
},
{
"id": 8,
"title": "C5",
"pid": 6
},
{
"id": 9,
"title": "D1",
"pid": 5
},
{
"id": 10,
"title": "E1",
"pid": 9
}
]使用：
public class User implements RvTree{
...
}
Type type = new TypeToken<List<User>>(){}.getType();
List<User> list = new Gson().fromJson(testStr, type);
// TreeAdapter<User> adapter = new TreeAdapter<>(this, list);
TreeAdapter<User> adapter = new TreeAdapter<>(this);
// 若不在初始化时指定数据，则需要手动调用notifyDataSetChanged来刷新列表
adapter.setNodes(list);
adapter.notifyDataSetChanged();
recyclerview.setAdapter(adapter);
final List<User> C1Childs = new ArrayList<>();
C1Childs.add(new User(11, 3, "C11"));
C1Childs.add(new User(12, 3, "C12"));
C1Childs.add(new User(13, 3, "C13"));
adapter.setListener(new TreeItemClickListener() {
@Override
public void OnClick(Node node) {
if (node.getId() == 3) {
// 向id为3的节点下面添加数据并展开
adapter.addChildrenById(3, C1Childs);
}
Toast.makeText(MainActivity.this, node.getName(), Toast.LENGTH_SHORT).show();
}
});