listview实现的tree树结构

2019-11-09 16:23:05

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转自：http://www.eoeandroid.com/thread-309141-1-1.html 会更新版本代码分享代码名称: myTreeViewDemo 代码描述: 使用listView实现的树状结构代码托管地址: - 代码作者: 阿富

效果图：

这里写图片描述

写在前面：首先说明一下，这个只是最基本的树状组织结构的展现，我自己ps的连接线o(∩_∩)o ，至于实际使用中，可以对+、-号以及节点图标和文本加入点击事件；也可以在节点前加入checkbox等。在做这个之前，网上也找了很久，找到的比较多的就是这个例子：http://www.apkbus.com/android-83520-1-1.html，但是这个不好看，所以基于这个才有了本例子。上代码：

TreeElement.java

package com.ccl.util.tree;import java.util.ArrayList;import java.util.List;import android.view.View.OnClickListener;public class TreeElement { PRivate int img_tree_space_n = R.drawable.tree_space_n; private int img_tree_space_y = R.drawable.tree_space_y; private String id;// 节点id private String caption;// 节点标题 private String value;// 节点的值 private int level;// 层级 private TreeElement parent;// 该节点的父节点 private boolean isHasChild;// 是否有子节点 private boolean isExpanded;// 是否处于展开 private ArrayList<TreeElement> childList;// 子节点数组 private boolean isLastSibling;// 是否是同级节点的最后一个 private ArrayList<Integer> spaceList;// 组织结构线条数组 private int position;// 在listview中所处的位置 private OnClickListener captionOnClickListener;// 节点文本点击事件 public TreeElement() { super(); } public TreeElement(String id, String caption, String value, Boolean isHasChild, OnClickListener captionOnClickListener) { this.id = id; this.caption = caption; this.value = value; this.parent = null; this.level = 0; this.isHasChild = isHasChild; this.isExpanded = false; if (isHasChild) { this.childList = new ArrayList<TreeElement>(); } this.isLastSibling = false; this.setSpaceList(new ArrayList<Integer>()); this.position = 0; this.setCaptionOnClickListener(captionOnClickListener); } // 添加子节点 public void addChild(TreeElement treeElement) { treeElement.parent = this; if (treeElement.getParent() != null && treeElement.getParent().getChildList().size() > 0) {// 将之前的同级节点的置为非最后一个节点 List<TreeElement> siblingList = treeElement.getParent() .getChildList(); treeElement.getParent().getChildList().get(siblingList.size() - 1) .setLastSibling(false); } this.childList.add(treeElement); this.isHasChild = true; treeElement.level = this.level + 1; treeElement.isLastSibling = true; if (this.level > 0) { treeElement.getSpaceList().addAll(this.getSpaceList()); if (this.isLastSibling()) { treeElement.getSpaceList().add(img_tree_space_n); } else { treeElement.getSpaceList().add(img_tree_space_y); } } } public String getId() { return id; } public void setId(String id) { this.id = id; } public String getCaption() { return caption; } public void setCaption(String caption) { this.caption = caption; } public String getValue() { return value; } public void setValue(String value) { this.value = value; } public TreeElement getParent() { return parent; } public void setParent(TreeElement parent) { this.parent = parent; } public boolean isHasChild() { return isHasChild; } public void setHasChild(boolean isHasChild) { this.isHasChild = isHasChild; } public boolean isExpanded() { return isExpanded; } public void setExpanded(boolean isExpanded) { this.isExpanded = isExpanded; } public ArrayList<TreeElement> getChildList() { return childList; } public void setChildList(ArrayList<TreeElement> childList) { this.childList = childList; } public int getLevel() { return level; } public void setLevel(int level) { this.level = level; } public boolean isLastSibling() { return isLastSibling; } public void setLastSibling(boolean isLastSibling) { this.isLastSibling = isLastSibling; } public ArrayList<Integer> getSpaceList() { return spaceList; } public void setSpaceList(ArrayList<Integer> spaceList) { this.spaceList = spaceList; } public int getPosition() { return position; } public void setPosition(int position) { this.position = position; } public OnClickListener getCaptionOnClickListener() { return captionOnClickListener; } public void setCaptionOnClickListener(OnClickListener captionOnClickListener) { this.captionOnClickListener = captionOnClickListener; }}

TreeViewAdapter.java

package com.ccl.util.tree;import java.util.ArrayList;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.View.OnClickListener;import android.view.ViewGroup;import android.widget.ArrayAdapter;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.TextView;import android.widget.Toast;public class TreeViewAdapter extends ArrayAdapter<TreeElement> { private int img_leaf = R.drawable.icon_user;// 没有子节点的节点图标 private int img_expand = R.drawable.outline_list_expand;// 展开的图标 private int img_collapse = R.drawable.outline_list_collapse;// 收缩的图标 private int img_tree_space_1 = R.drawable.tree_space_1;// 连接线 private int img_tree_space_2 = R.drawable.tree_space_2; private Context context; private LayoutInflater mInflater; private ArrayList<TreeElement> treeElementList; private int viewResourceId; public TreeViewAdapter(Context context, int viewResourceId, ArrayList<TreeElement> objects) { super(context, viewResourceId, objects); this.context = context; this.mInflater = LayoutInflater.from(context); this.treeElementList = objects; this.viewResourceId = viewResourceId; } @Override public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder; convertView = mInflater.inflate(viewResourceId, null); holder = new ViewHolder(); holder.caption = (TextView) convertView.findViewById(R.id.caption); holder.icon = (ImageView) convertView.findViewById(R.id.icon); holder.space = (LinearLayout) convertView.findViewById(R.id.space); convertView.setTag(holder); TreeElement treeElement = treeElementList.get(position); int level = treeElement.getLevel(); if (level == 0) {// 根节点 } else { ArrayList<Integer> spaceList = treeElement.getSpaceList(); // 绘制前面的组织架构线条 for (int i = 0; i < spaceList.size(); i++) { ImageView img = new ImageView(context); img.setImageResource(spaceList.get(i)); holder.space.addView(img); } ImageView img = new ImageView(context); // 节点图标 if (treeElement.isLastSibling()) { img.setImageResource(img_tree_space_2); } else { img.setImageResource(img_tree_space_1); } holder.space.addView(img); } if (treeElement.isHasChild()) { if (treeElement.isExpanded()) { holder.icon.setImageResource(img_expand); } else { holder.icon.setImageResource(img_collapse); } holder.icon.setOnClickListener(new TreeElementIconClickListener( context, treeElementList, this, treeElement.getPosition())); } else { holder.icon.setImageResource(img_leaf); } holder.caption.setText(treeElement.getCaption());// 设置标题 if (treeElement.getCaptionOnClickListener() != null) {// 设置文字的点击事件 holder.caption.setTag(treeElement.getValue()); holder.caption.setOnClickListener(treeElement .getCaptionOnClickListener()); } return convertView; } class ViewHolder { LinearLayout space; TextView caption; ImageView icon; } public static class TreeElementIconClickListener implements OnClickListener { private Context context; private ArrayList<TreeElement> treeElementList; private TreeViewAdapter treeViewAdapter; private int position; public TreeElementIconClickListener(Context mContext, ArrayList<TreeElement> mTreeElementList, TreeViewAdapter mTreeViewAdapter, int position) { this.context = mContext; this.treeElementList = mTreeElementList; this.treeViewAdapter = mTreeViewAdapter; this.position = position; } @Override public void onClick(View v) { System.out.println("点击的position:" + position); if (!treeElementList.get(position).isHasChild()) { Toast.makeText(context, treeElementList.get(position).getCaption(), Toast.LENGTH_SHORT).show(); return; } if (treeElementList.get(position).isExpanded()) { treeElementList.get(position).setExpanded(false); TreeElement element = treeElementList.get(position); ArrayList<TreeElement> temp = new ArrayList<TreeElement>(); for (int i = position + 1; i < treeElementList.size(); i++) { if (element.getLevel() >= treeElementList.get(i).getLevel()) { break; } temp.add(treeElementList.get(i)); } treeElementList.removeAll(temp); for (int i = position + 1; i < treeElementList.size(); i++) { System.out.println(treeElementList.get(i).getCaption() + "@@@" + i); treeElementList.get(i).setPosition(i); } treeViewAdapter.notifyDataSetChanged(); } else { TreeElement obj = treeElementList.get(position); obj.setExpanded(true); int level = obj.getLevel(); int nextLevel = level + 1; ArrayList<TreeElement> tempList = obj.getChildList(); for (int i = 0; i < tempList.size(); i++) { TreeElement element = tempList.get(i); element.setLevel(nextLevel); element.setExpanded(false); treeElementList.add(position + i + 1, element); } for (int i = position + 1; i < treeElementList.size(); i++) { System.out.println(treeElementList.get(i).getCaption() + "@@@" + i); treeElementList.get(i).setPosition(i); } treeViewAdapter.notifyDataSetChanged(); } } }}

MainActivity.java

package com.ccl.util.tree;import java.util.ArrayList;import com.ccl.util.tree.TreeViewAdapter.TreeElementIconClickListener;import android.os.Bundle;import android.app.Activity;import android.view.View;import android.view.View.OnClickListener;import android.widget.ListView;import android.widget.Toast;public class MainActivity extends Activity { private ListView lv_tree; private TreeViewAdapter treeViewAdapter; private ArrayList<TreeElement> mRootList; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); lv_tree = (ListView) findViewById(R.id.lv_tree); mRootList = new ArrayList<TreeElement>(); treeViewAdapter = new TreeViewAdapter(this, R.layout.atom_tree, mRootList); lv_tree.setAdapter(treeViewAdapter); OnClickListener myOnClickListener = new OnClickListener() { @Override public void onClick(View v) { Toast.makeText(MainActivity.this, "--" + v.getTag(), Toast.LENGTH_LONG).show(); } }; TreeElement rootElement = new TreeElement("root", "root", "1", true, null); TreeElement treeElement1 = new TreeElement("node1", "节点1", "1", true, null); TreeElement treeElement2 = new TreeElement("node2", "节点2", "2", false, myOnClickListener); TreeElement treeElement3 = new TreeElement("node3", "节点3", "1", false, myOnClickListener); TreeElement treeElement4 = new TreeElement("node3", "节点4", "1", true, myOnClickListener); TreeElement treeElement1_1 = new TreeElement("node14", "节点1_1", "1", true, myOnClickListener); TreeElement treeElement1_2 = new TreeElement("node14", "节点1_2", "1", false, myOnClickListener); TreeElement treeElement1_3 = new TreeElement("node14", "节点1_3", "1", true, myOnClickListener); TreeElement treeElement1_1_1 = new TreeElement("node14", "节点1_1_1", "1", false, myOnClickListener); TreeElement treeElement1_3_1 = new TreeElement("node14", "节点1_3_1", "1", true, myOnClickListener); TreeElement treeElement1_3_2 = new TreeElement("node14", "节点1_3_2", "1", false, myOnClickListener); TreeElement treeElement1_3_1_1 = new TreeElement("node14", "节点1_3_1_1", "1", false, myOnClickListener); TreeElement treeElement4_1 = new TreeElement("node14", "节点4_1", "1", true, myOnClickListener); TreeElement treeElement4_2 = new TreeElement("node14", "节点4_2", "1", false, myOnClickListener); TreeElement treeElement4_3 = new TreeElement("node14", "节点4_3", "1", true, myOnClickListener); TreeElement treeElement4_1_1 = new TreeElement("node14", "节点4_1_1", "1", false, myOnClickListener); TreeElement treeElement4_3_1 = new TreeElement("node14", "节点4_3_1", "1", false, myOnClickListener); mRootList.add(rootElement); rootElement.addChild(treeElement1); rootElement.addChild(treeElement2); rootElement.addChild(treeElement3); rootElement.addChild(treeElement4); treeElement1.addChild(treeElement1_1); treeElement1.addChild(treeElement1_2); treeElement1.addChild(treeElement1_3); treeElement1_1.addChild(treeElement1_1_1); treeElement1_3.addChild(treeElement1_3_1); treeElement1_3.addChild(treeElement1_3_2); treeElement1_3_1.addChild(treeElement1_3_1_1); treeElement4.addChild(treeElement4_1); treeElement4.addChild(treeElement4_2); treeElement4.addChild(treeElement4_3); treeElement4_1.addChild(treeElement4_1_1); treeElement4_3.addChild(treeElement4_3_1); treeViewAdapter.notifyDataSetChanged(); System.out.println(1111); // 展开根目录 TreeElementIconClickListener mtest = new TreeElementIconClickListener( MainActivity.this, mRootList, treeViewAdapter, 0); mtest.onClick(null); }}

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