树视图类似功能的Android [英] TreeView like Functionality Android
本文介绍了树视图类似功能的Android的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我实施的TreeView
我的应用程序。
我在网上搜索,发现了一个的ListView
实施的TreeView
这是太乱了。是否有可能实现n个电平的TreeView
使用 ExpandableListView
?
I'm implementing TreeView
for my app.
I've searched the web, found one ListView
implementation TreeView
which is too messy. Is it possible to implement n level TreeView
using ExpandableListView
?
请分享您的想法或引用我的一些例子。
Please Share your Ideas or reference me to some examples.
在此先感谢。
推荐答案
我解决我的问题很久以前有的ListView
。共有人谁有同样的问题,问我分享我的解决方案
,所以我在这里。
I solved my problem long time ago with ListView
. There were people who had the same problem and asked me to share my solution
, so here I am.
TreeElementI.java
public interface TreeElementI extends Serializable{
public void addChild(TreeElementI child);
public String getId();
public void setId(String id);
public String getOutlineTitle();
public void setOutlineTitle(String outlineTitle);
public boolean isHasParent();
public void setHasParent(boolean hasParent);
public boolean isHasChild();
public void setHasChild(boolean hasChild);
public int getLevel();
public void setLevel(int level);
public boolean isExpanded();
public void setExpanded(boolean expanded);
public ArrayList<TreeElementI> getChildList();
public TreeElementI getParent();
public void setParent(TreeElementI parent);
}
TreeElement.java
public class TreeElement implements TreeElementI{
private String id;
private String outlineTitle;
private boolean hasParent;
private boolean hasChild;
private TreeElementI parent;
private int level;
private ArrayList<TreeElementI> childList;
private boolean expanded;
public TreeElement(String id, String outlineTitle) {
super();
this.childList = new ArrayList<TreeElementI>();
this.id = id;
this.outlineTitle = outlineTitle;
this.level = 0;
this.hasParent = true;
this.hasChild = false;
this.parent = null;
}
public TreeElement(String id, String outlineTitle, boolean hasParent, boolean hasChild, TreeElement parent, int level, boolean expanded) {
super();
this.childList = new ArrayList<TreeElementI>();
this.id = id;
this.outlineTitle = outlineTitle;
this.hasParent = hasParent;
this.hasChild = hasChild;
this.parent = parent;
if(parent != null) {
this.parent.getChildList().add(this);
}
this.level = level;
this.expanded = expanded;
}
@Override
public void addChild(TreeElementI child) {
this.getChildList().add(child);
this.setHasParent(false);
this.setHasChild(true);
child.setParent(this);
child.setLevel(this.getLevel() + 1);
}
@Override
public String getId() {
return this.id;
}
@Override
public void setId(String id) {
this.id = id;
}
@Override
public String getOutlineTitle() {
return this.outlineTitle;
}
@Override
public void setOutlineTitle(String outlineTitle) {
this.outlineTitle = outlineTitle;
}
@Override
public boolean isHasParent() {
return this.hasParent;
}
@Override
public void setHasParent(boolean hasParent) {
this.hasParent = hasParent;
}
@Override
public boolean isHasChild() {
return this.hasChild;
}
@Override
public void setHasChild(boolean hasChild) {
this.hasChild = hasChild;
}
@Override
public int getLevel() {
return this.level;
}
@Override
public void setLevel(int level) {
this.level = level;
}
@Override
public boolean isExpanded() {
return this.expanded;
}
@Override
public void setExpanded(boolean expanded) {
this.expanded = expanded;
}
@Override
public ArrayList<TreeElementI> getChildList() {
return this.childList;
}
@Override
public TreeElementI getParent() {
return this.parent;
}
@Override
public void setParent(TreeElementI parent) {
this.parent = parent;
}
}
TreeViewClassifAdapter.java
public class TreeViewClassifAdapter extends BaseAdapter {
private static final int TREE_ELEMENT_PADDING_VAL = 25;
private List<TreeElementI> fileList;
private Context context;
private Bitmap iconCollapse;
private Bitmap iconExpand;
private Dialog dialog;
private EditText textLabel;
private XTreeViewClassif treeView;
public TreeViewClassifAdapter(Context context, List<TreeElementI> fileList, Dialog dialog, EditText textLabel, XTreeViewClassif treeView) {
this.context = context;
this.fileList = fileList;
this.dialog = dialog;
this.textLabel = textLabel;
this.treeView = treeView;
iconCollapse = BitmapFactory.decodeResource(context.getResources(), R.drawable.x_treeview_outline_list_collapse);
iconExpand = BitmapFactory.decodeResource(context.getResources(), R.drawable.x_treeview_outline_list_expand);
}
public List<TreeElementI> getListData() {
return this.fileList;
}
@Override
public int getCount() {
return this.fileList.size();
}
@Override
public Object getItem(int position) {
return this.fileList.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
convertView = View.inflate(context, R.layout.x_treeview_classif_list_item, null);
holder = new ViewHolder();
holder.setTextView((TextView) convertView.findViewById(R.id.text));
holder.setImageView((ImageView) convertView.findViewById(R.id.icon));
convertView.setTag(holder);
final TreeElementI elem = (TreeElementI) getItem(position);
int level = elem.getLevel();
holder.getIcon().setPadding(TREE_ELEMENT_PADDING_VAL * (level + 1), holder.icon.getPaddingTop(), 0, holder.icon.getPaddingBottom());
holder.getText().setText(elem.getOutlineTitle());
if (elem.isHasChild() && (elem.isExpanded() == false)) {
holder.getIcon().setImageBitmap(iconCollapse);
} else if (elem.isHasChild() && (elem.isExpanded() == true)) {
holder.getIcon().setImageBitmap(iconExpand);
} else if (!elem.isHasChild()) {
holder.getIcon().setImageBitmap(iconCollapse);
holder.getIcon().setVisibility(View.INVISIBLE);
}
IconClickListener iconListener = new IconClickListener(this, position);
TextClickListener txtListener = new TextClickListener((ArrayList<TreeElementI>) this.getListData(), position);
holder.getIcon().setOnClickListener(iconListener);
holder.getText().setOnClickListener(txtListener);
return convertView;
}
private class ViewHolder {
ImageView icon;
TextView text;
public TextView getText() {
return this.text;
}
public void setTextView(TextView text) {
this.text = text;
}
public ImageView getIcon() {
return this.icon;
}
public void setImageView(ImageView icon) {
this.icon = icon;
}
}
/**
* Listener For TreeElement Text Click
*/
private class TextClickListener implements View.OnClickListener {
private ArrayList<TreeElementI> list;
private int position;
public TextClickListener(ArrayList<TreeElementI> list, int position) {
this.list = list;
this.position = position;
}
@Override
public void onClick(View v) {
treeView.setXValue(String.valueOf(list.get(position).getId()));
dialog.dismiss();
}
}
/**
* Listener for TreeElement "Expand" button Click
*/
private class IconClickListener implements View.OnClickListener {
private ArrayList<TreeElementI> list;
private TreeViewClassifAdapter adapter;
private int position;
public IconClickListener(TreeViewClassifAdapter adapter, int position) {
this.list = (ArrayList<TreeElementI>) adapter.getListData();
this.adapter = adapter;
this.position = position;
}
@Override
public void onClick(View v) {
if (!list.get(position).isHasChild()) {
return;
}
if (list.get(position).isExpanded()) {
list.get(position).setExpanded(false);
TreeElementI element = list.get(position);
ArrayList<TreeElementI> temp = new ArrayList<TreeElementI>();
for (int i = position + 1; i < list.size(); i++) {
if (element.getLevel() >= list.get(i).getLevel()) {
break;
}
temp.add(list.get(i));
}
list.removeAll(temp);
adapter.notifyDataSetChanged();
} else {
TreeElementI obj = list.get(position);
obj.setExpanded(true);
int level = obj.getLevel();
int nextLevel = level + 1;
for (TreeElementI element : obj.getChildList()) {
element.setLevel(nextLevel);
element.setExpanded(false);
list.add(position + 1, element);
}
adapter.notifyDataSetChanged();
}
}
}
}
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