数据适配器基类：
**
* 树形ListView的数据适配器类
* @description：
* @author ldm
* @date 2015-10-9 上午9:47:01
*/
public abstract class TreeViewBaseAdapter<T> extends BaseAdapter {
protected Context context;
protected List<T> datas;
protected List<Node> mAllNodes;
protected List<Node> mVisibleNodes;
protected LayoutInflater mInflater;
protected ListView treeLv;
protected TreeViewOnItemClick mTreeListener;
public TreeViewBaseAdapter(ListView treeLv, Context context, List<T> datas, int defaultExpandLevel) throws IllegalAccessException, IllegalArgumentException {
this.context = context;
this.treeLv = treeLv;
mInflater = LayoutInflater.from(context);
mAllNodes = TreeHelperTools.getSortedNodes(datas, defaultExpandLevel);
mVisibleNodes = TreeHelperTools.filterVisibleNodes(mAllNodes);
this.treeLv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {
expandOrCollapse(position);
if(mTreeListener!=null){
mTreeListener.onTreeItemClick(position, mVisibleNodes.get(position));
}
}
});
}
public void setmTreeListener(TreeViewOnItemClick mTreeListener) {
this.mTreeListener = mTreeListener;
}
/**
* 设置ListView点击item节点时，是否应该展开
* @description：
* @author ldm
* @date 2015-10-10 上午9:05:08
*/
protected void expandOrCollapse(int position) {
Node n=mVisibleNodes.get(position);
if(n!=null){
if(n.isLeaf()){
return;
}
n.setExpand(!n.isExpand());
mVisibleNodes=TreeHelperTools.filterVisibleNodes(mAllNodes);
notifyDataSetChanged();
}
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return mVisibleNodes.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return mVisibleNodes.get(position);
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
Node node=mVisibleNodes.get(position);
convertView = getContentView(node,position, convertView, parent);
return convertView;
}
public abstract View getContentView(Node node,int position, View convertView, ViewGroup parent);
public interface TreeViewOnItemClick{
void onTreeItemClick(int position,Node node);
}
}
我们使用的Adapter
public class TreeListViewAdapter<T> extends TreeViewBaseAdapter<T> {
public TreeListViewAdapter(ListView treeLv, Context context, List<T> datas, int defaultExpandLevel) throws IllegalAccessException, IllegalArgumentException {
super(treeLv, context, datas, defaultExpandLevel);
}
@Override
public View getContentView(Node node, int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if (convertView == null) {
holder = new ViewHolder();
convertView = mInflater.inflate(R.layout.tree_listview_item, parent, false);
holder.mItemIv = (ImageView) convertView.findViewById(R.id.mItemIv);
holder.mItemTv = (TextView) convertView.findViewById(R.id.mItemTv);
convertView.setTag(holder);
}
else {
holder = (ViewHolder) convertView.getTag();
}
holder.mItemIv.setPadding(node.getLevel()*30, 3, 3, 3);
if (node.getIcon() == -1) {
holder.mItemIv.setVisibility(View.INVISIBLE);
}
else {
holder.mItemIv.setVisibility(View.VISIBLE);
holder.mItemIv.setImageResource(node.getIcon());
}
holder.mItemTv.setText(node.getName());
return convertView;
}
private static class ViewHolder {
ImageView mItemIv;
TextView mItemTv;
}
/**
* 动态插入数据
* @description：
* @author ldm
* @date 2015-10-10 上午10:08:03
*/
public void insertNodeData(int position,String label) {
Node node=mVisibleNodes.get(position);
int indexOf=mAllNodes.indexOf(node);
Node insertNode=new Node(-1, node.getId(), label);
insertNode.setParent(node);
node.getChildren().add(insertNode);
mAllNodes.add(indexOf+1,insertNode);
mVisibleNodes=TreeHelperTools.filterVisibleNodes(mVisibleNodes);
notifyDataSetChanged();
}
}
