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BaseExpandableListAdapter

发布日期：2022-03-15 04:11:21 浏览次数：58 分类：技术文章

本文共 4337 字，大约阅读时间需要 14 分钟。

先看效果~

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2011-5-8 08:45 上传

也就是BaseExpandableListAdapter、AbsListView类的使用，就不多说了..大牛留情...

就两个类。

ExpandLabel:

package com.yfz;

import java.util.ArrayList;

import java.util.List;

import android.app.Activity;

import android.os.Bundle;

import android.view.ViewGroup.LayoutParams;

import android.widget.ExpandableListView;

import android.widget.ViewFlipper;

public class ExpandLabel extends Activity {

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

// 数据源

//标题

List<String> groupArray = new ArrayList<String>();

//子标题

List<List<String>> childArray = new ArrayList<List<String>>();

groupArray.add("第一章");

groupArray.add("第二章");

List<String> tempArray01 = new ArrayList<String>();

tempArray01.add("第1.1节");

tempArray01.add("第1.2节");

tempArray01.add("第1.3节");

List<String> tempArray02 = new ArrayList<String>();

tempArray02.add("第2.1节");

tempArray02.add("第2.2节");

tempArray02.add("第2.3节");

childArray.add(tempArray01);

childArray.add(tempArray02);

ExpandableListView expandableListView = new ExpandableListView(this);

ExpandableAdapter adapter = new ExpandableAdapter(this,groupArray,childArray);

expandableListView.setAdapter(adapter);

addContentView(expandableListView, new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));

}

}

复制代码

树形菜单类，只要传两个List过来就可以直接使用了。groupArray：表示一级菜单childArray：表示二级菜单二级菜单相当于一个二维List，该List中存储的每个元素都是一个List。第一个元素对应一级菜单中第一个菜单的子项List，第二个元素对应一级菜单中第二个菜单的子项List，依次类推。ExpandableAdapter：

package com.yfz;

import java.util.ArrayList;

import java.util.List;

import android.app.Activity;

import android.view.Gravity;

import android.view.View;

import android.view.ViewGroup;

import android.widget.AbsListView;

import android.widget.BaseExpandableListAdapter;

import android.widget.TextView;

public class ExpandableAdapter extends BaseExpandableListAdapter {

private List<String> groupArray;

private List<List<String>> childArray;

private Activity activity;

public ExpandableAdapter(Activity a,List<String> groupArray,List<List<String>> childArray) {

activity = a;

this.groupArray = groupArray;

this.childArray = childArray;

}

@Override

public Object getChild(int groupPosition, int childPosition) {

// TODO Auto-generated method stub

return childArray.get(groupPosition).get(childPosition);

}

@Override

public long getChildId(int groupPosition, int childPosition) {

// TODO Auto-generated method stub

return childPosition;

}

@Override

public View getChildView(int groupPosition, int childPosition,

boolean isLastChild, View convertView, ViewGroup parent) {

// TODO Auto-generated method stub

String string = childArray.get(groupPosition).get(childPosition);

return getGenericView(string);

}

@Override

public int getChildrenCount(int groupPosition) {

// TODO Auto-generated method stub

return childArray.get(groupPosition).size();

}

@Override

public Object getGroup(int groupPosition) {

// TODO Auto-generated method stub

return groupArray.get(groupPosition);

}

@Override

public int getGroupCount() {

// TODO Auto-generated method stub

return groupArray.size();

}

@Override

public long getGroupId(int groupPosition) {

// TODO Auto-generated method stub

return groupPosition;

}

@Override

public View getGroupView(int groupPosition, boolean isExpanded,

View convertView, ViewGroup parent) {

// TODO Auto-generated method stub

String string = groupArray.get(groupPosition);

return getGenericView(string);

}

@Override

public boolean hasStableIds() {

// TODO Auto-generated method stub

return false;

}

@Override

public boolean isChildSelectable(int groupPosition, int childPosition) {

// TODO Auto-generated method stub

return false;

}

/****************************************以下为自定义方法*********************************************/

* Children 's View

* @param string

* @return

public TextView getGenericView(String string) {

AbsListView.LayoutParams layoutParams = new AbsListView.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, 64);

TextView text = new TextView(activity);

text.setLayoutParams(layoutParams);

// Center the text vertically

text.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);

// Set the text starting position

text.setPadding(36, 0, 0, 0);

text.setText(string);

return text;

}

}

转载于:https://www.cnblogs.com/ada-zheng/archive/2012/12/28/2836744.html

转载地址：https://blog.csdn.net/weixin_30536513/article/details/99810305 如侵犯您的版权，请留言回复原文章的地址，我们会给您删除此文章，给您带来不便请您谅解！

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