Android中构建treeview控件的建议
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原文地址: http://stackoverflow.com/questions/3159758/
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Suggestions for building a treeview control in Android
提问by nas
Suggestions for building a treeview control in Android
Android中构建treeview控件的建议
采纳答案by Robby Pond
The ExpandableListViewis probably the closest existing thing. Keep in mind though that it might be hard for a user to fat finger a tree view.
该ExpandableListView可能是最接近现有的东西。但请记住，用户可能很难对树视图进行粗指。
回答by 2red13
I built a treeviewof my own which supports n levels. It's easy to use in touch screens, especially on devices with larger screen.
I Used a class which extends ListviewAdapterand created my own listitem. the items know on which level they are and they inherit the expandstateof their parents (by remembering their own state). This Tree is quite fast up to thousand items.
treeview我自己构建了一个支持 n 个级别的工具。它很容易在触摸屏中使用，尤其是在屏幕较大的设备上。我使用了一个扩展ListviewAdapter并创建了我自己的listitem. 这些项目知道它们处于哪个级别，并且它们继承了expandstate它们的父母（通过记住它们自己的状态）。这棵树非常快，最多可容纳数千个项目。
Edit: added the code, but the way I wrote in the comment, It won't be very helpful, because it's very close to my own needs.
编辑：添加了代码，但是我在评论中写的方式，它不会很有帮助，因为它非常接近我自己的需求。
package de.supinfo.FISDroid;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Color;
import android.graphics.drawable.PaintDrawable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
public class EfficientAdapter extends BaseAdapter {
private LayoutInflater mInflater;
private Bitmap mIcon1;
private int active_view;
private int last_path;
public String[][] values = new String[0][];
public EfficientAdapter(Context context, String[][] str_arr_values, int int_active_view) {
// Cache the LayoutInflate to avoid asking for a new one each time.
mInflater = LayoutInflater.from(context);
values = str_arr_values;
active_view = int_active_view;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
int padding = 0;
// int selfstate = Integer.parseInt(values[position][4].trim());
ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.xml.list_item_icon_text, null);
holder = new ViewHolder();
holder.text = (TextView) convertView.findViewById(R.id.text_view);
holder.icon = (ImageView) convertView.findViewById(R.id.img_view);
holder.expanded = (ImageView) convertView.findViewById(R.id.ImageView01);
holder.llout = (LinearLayout) convertView.findViewById(R.id.list_item_icon_text);
holder.docs = (TextView) convertView.findViewById(R.id.doc_count);
holder.prun = (ImageView) convertView.findViewById(R.id.prun);
holder.coord = (ImageView) convertView.findViewById(R.id.coord);
holder.button = (Button) convertView.findViewById(R.id.button);
holder.button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
main.tabHost.setCurrentTab(2);
}
});
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
// Bind the data efficiently with the holder.
String text = values[position][0];
String docs = values[position][11];
if (!docs.equals("0")) {
// TODO
// Anzeige das Dokumente vorhanden sind, eventuell Anzahl
holder.docs.setText(docs);
holder.docs.setVisibility(View.VISIBLE);
} else {
holder.docs.setVisibility(View.INVISIBLE);
}
holder.coord.setVisibility(values[position][12].equals("") || values[position][12].equals("0") || values[position][12].equals("0.0") ? View.INVISIBLE : View.VISIBLE);
holder.prun.setVisibility(values[position][14].equals("") ? View.INVISIBLE : View.VISIBLE);
holder.text.setText(text);
holder.text.setTextSize(GlobalVars.Style.TextSize);
if (position == active_view) {
holder.text.setTextColor(R.color.headline_font);
PaintDrawable pd = new PaintDrawable(Color.RED);
holder.llout.setBackgroundDrawable(pd);
holder.text.setSingleLine(false);
holder.button.setVisibility(values[position][1].equals("-1") ? View.GONE : View.VISIBLE);
} else {
holder.text.setTextColor(R.color.headline_font);
PaintDrawable pd = new PaintDrawable(Color.TRANSPARENT);
holder.llout.setBackgroundDrawable(pd);
holder.text.setSingleLine(true);
holder.button.setVisibility(View.GONE);
}
int i = Integer.parseInt(values[position][5].trim());
mIcon1 = GlobalHelper.GetIcon(i);
holder.icon.setImageBitmap(mIcon1);
if (values[position][8].equals("-1")) {
holder.expanded.setVisibility(View.VISIBLE);
holder.expanded.setImageResource(android.R.drawable.ic_input_add);
} else if (values[position][8].equals("0")) {
holder.expanded.setVisibility(View.INVISIBLE);
} else if (values[position][8].equals("1")) {
holder.expanded.setVisibility(View.VISIBLE);
if (values[position][9].equals("1")) {
holder.expanded.setImageResource(android.R.drawable.ic_menu_revert);
} else {
holder.expanded.setImageResource(android.R.drawable.ic_input_add);
}
}
padding = Integer.parseInt(values[position][7].trim()) * 24;
convertView.setPadding(padding, 5, 5, 5);
return convertView;
}
static class ViewHolder {
LinearLayout llout;
TextView text;
ImageView icon;
ImageView expanded;
ImageView coord;
ImageView prun;
TextView docs;
Button button;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return values.length;
}
public String[] getValues(int position) {
return values[position];
}
public String getValue(int position) {
return values[position][0];
}
public String getDatid(int position) {
return values[position][1];
}
public String getPath(int position) {
return values[position][2];
}
public String getParent(int position) {
return values[position][3];
}
public void set_active_view() {
active_view = GlobalVars.cn.index;
}
public int get_active_view() {
return active_view;
}
public void set_last_path(int position) {
last_path = position;
}
public int get_last_path() {
return last_path;
}
}
Edit: added the xml
编辑：添加了xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
android:id="@+id/list_item_icon_text"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:background="@color/tree_normal_back"
android:padding="1dip"
android:orientation="horizontal"
android:layout_width="fill_parent">
<LinearLayout
android:id="@+id/plusminus"
android:layout_height="48dip"
android:layout_width="24dip"
android:gravity="right|center_vertical">
<ImageView
android:id="@+id/ImageView01"
android:layout_height="24dip"
android:layout_width="24dip"/>
</LinearLayout>
<LinearLayout
android:id="@+id/LinearLayout01"
android:layout_height="48dip"
android:layout_width="48dip"
android:orientation="horizontal"
android:paddingLeft="4dip">
<LinearLayout
android:id="@+id/LinearLayout02"
android:layout_height="48dip" android:orientation="vertical" android:layout_width="16dip">
<TextView
android:text="0"
android:id="@+id/doc_count"
android:textColorHighlight="@color/headline_font"
android:layout_gravity="center_vertical"
android:textColor="@color/black"
android:textSize="12dip"
android:layout_margin="0dip"
android:padding="0dip"
android:paddingTop="0dip"
android:gravity="center_vertical|center_horizontal"
android:background="@drawable/ico_24_paperclip"
android:textStyle="normal" android:layout_height="16dip" android:layout_width="16dip">
</TextView>
<ImageView
android:id="@+id/prun"
android:layout_gravity="center_vertical"
android:layout_height="16dip"
android:layout_width="16dip" android:background="@drawable/ico_24_prun"/>
<ImageView
android:id="@+id/coord"
android:layout_gravity="center_vertical"
android:layout_height="16dip"
android:layout_width="16dip" android:background="@drawable/ico_24_coord"/>
</LinearLayout>
<ImageView
android:id="@+id/img_view"
android:layout_gravity="center_vertical"
android:layout_height="24dip"
android:layout_width="24dip" />
</LinearLayout>
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/tabs_edit"
android:focusable="false"
android:visibility="gone">
</Button>
<TextView
android:layout_gravity="center_vertical"
android:padding="2dip"
android:marqueeRepeatLimit="2"
android:layout_width="wrap_content"
android:textSize="22dip"
android:textColor="@color/tree_normal_font"
android:id="@+id/text_view"
android:layout_height="wrap_content">
</TextView>
</LinearLayout>
回答by Jarek Potiuk
Here is a solution that our company open-sourced as a library (so very easy to re-use):
这是我们公司作为库开源的解决方案（因此非常易于重用）：
http://code.google.com/p/tree-view-list-android/
http://code.google.com/p/tree-view-list-android/
回答by Khairul Alam Licon
You can use this library: https://github.com/bmelnychuk/AndroidTreeViewto get your required tree-view. It's a N-level tree where you can control every single node in tree.
您可以使用此库：https: //github.com/bmelnychuk/AndroidTreeView来获取所需的树视图。它是一个 N 级树，您可以在其中控制树中的每个节点。
Usage
用法
1) install: compile 'com.github.bmelnychuk:atv:1.2.+'
1）安装： compile 'com.github.bmelnychuk:atv:1.2.+'
2) build tree-view:
2）构建树视图：
TreeNode root = TreeNode.root();
TreeNode parent = new TreeNode("node-name");
TreeNode child0 = new TreeNode("child-node-name-1");
TreeNode child1 = new TreeNode("child_node-name-2");
parent.addChildren(child0, child1);
root.addChild(parent);
