android 三级菜单 BaseExpandableListAdapter-低调大师

android 三级菜单 BaseExpandableListAdapter

2017-11-07 513

在网上搜了非常长时间。没有找到合适的Android三级菜单。所以就自己动手写了一个，主要使用了BaseExpandableList来实现，通过三个布局文件来完毕相应的菜单项，详细实现请參照下图。

通过上面两图能够看出为三级菜单，每个菜单相应一个实体类，能够通过json解析数据载入进来，这里就只是多解释了。直接上源代码！

Activity实现类：

package com.zkq.activity;

import java.util.ArrayList;
import java.util.List;

import com.example.teltest.R;
import com.zkq.model.FirstItem;
import com.zkq.model.SecondItem;
import com.zkq.model.ThirdItem;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.ExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.ExpandableListView.OnChildClickListener;
import android.widget.Toast;

import com.zkq.adapter.*;

public class MainActivity extends Activity {
	private ExpandableListView listView;
	private List<FirstItem> firstList;
	private ExpandableListAdapter eAdpater;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		initView();
		initData();
	}

	private void initView() {
		// TODO Auto-generated method stub
		listView = (ExpandableListView) findViewById(R.id.expandList);
		firstList = new ArrayList<FirstItem>();
	}

	private void initData() {
		// TODO Auto-generated method stub
		for (int i = 0; i < 10; i++) {
			FirstItem firstItem = new FirstItem();
			firstItem.setId(i);
			firstItem.setTitle("这是第" + i + "个");
			List<SecondItem> seList = new ArrayList<SecondItem>();
			for (int j = i; j < 10; j++) {
				SecondItem secondItem = new SecondItem();
				secondItem.setId(i);
				secondItem.setTitle("子的第" + j * 78 + "条");
				seList.add(secondItem);
				List<ThirdItem> thirdList = new ArrayList<ThirdItem>();
				for (int k = 0; k < j + 1; k++) {
					ThirdItem thirdItem = new ThirdItem();
					thirdItem.setId(k);
					thirdItem.setImage("sss");
					thirdItem.setName("张凯强" + k + j);
					thirdItem.setTel("10086" + j + k);
					thirdList.add(thirdItem);
				}
				secondItem.setThirdItems(thirdList);
			}
			firstItem.setSecondItems(seList);
			firstList.add(firstItem);
		}
		eAdpater = new ExpandAdapter(MainActivity.this, firstList,stvClickEvent);
		listView.setAdapter(eAdpater);
		listView.setOnChildClickListener(new OnChildClickListener() {
			@Override
			public boolean onChildClick(ExpandableListView parent, View view,
					int groupPosition, int childPosition, long id) {
				// TODO Auto-generated method stub
				Toast.makeText(MainActivity.this,
						childPosition + "---ccc===" + groupPosition,
						Toast.LENGTH_LONG).show();
				return false;
			}
		});
	}

	OnChildClickListener stvClickEvent = new OnChildClickListener() {

		@Override
		public boolean onChildClick(ExpandableListView parent, View v,
				int groupPosition, int childPosition, long id) {
			// TODO Auto-generated method stub
			String msg = "parent_id = " + groupPosition + " child_id = "
					+ childPosition;
			Toast.makeText(MainActivity.this, msg,
					Toast.LENGTH_SHORT).show();
			return false;
		}
	};

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}

两个Adapter:

package com.zkq.adapter;

import java.util.List;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.BaseExpandableListAdapter;
import android.widget.ExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.ExpandableListView.OnChildClickListener;
import android.widget.Toast;

import com.example.teltest.R;
import com.zkq.model.FirstItem;
import com.zkq.model.SecondItem;
import com.zkq.util.Constants;

public class ExpandAdapter extends BaseExpandableListAdapter {

	private Context context;
	private List<FirstItem> firstList;
	private OnChildClickListener stvClickEvent;//外部回调函数
	// private List<SecondItem> secondList;

	public ExpandAdapter(Context context, List<FirstItem> firstList,OnChildClickListener stvClickEvent) {
		// TODO Auto-generated constructor stub
		this.context = context;
		this.firstList = firstList;
		this.stvClickEvent=stvClickEvent;
		// this.secondList = secondList;
	}

	@Override
	public Object getChild(int groupPosition, int childPosition) {
		return firstList.get(groupPosition).getSecondItems();
	}

	@Override
	public long getChildId(int groupPosition, int childPosition) {
		return childPosition;
	}

	@Override
	public View getChildView(int groupPosition, int childPosition,
			boolean isLastChild, View convertView, ViewGroup parent) {
		// TODO Auto-generated method stub
		ExpandableListView treeView = getExpandableListView(firstList.get(groupPosition).getSecondItems().size());
		ExpandAdapter2 expandAdapter2 = new ExpandAdapter2(context, firstList,
				childPosition, groupPosition,treeView,stvClickEvent);
		//treeView.setOnChildClickListener(stvClickEvent);
		treeView.setAdapter(expandAdapter2);
		return treeView;
	}

	public ExpandableListView getExpandableListView(int position) {
		  AbsListView.LayoutParams params = new AbsListView.LayoutParams(  
	                ViewGroup.LayoutParams.FILL_PARENT, Constants.SECOND_ITEM_HEIGHT*position);  
		ExpandableListView superTreeView = new ExpandableListView(context);
		superTreeView.setLayoutParams(params);
		return superTreeView;
	}

	@Override
	public int getChildrenCount(int position) {
		// TODO Auto-generated method stub
		return 1;
	}

	@Override
	public Object getGroup(int position) {
		// TODO Auto-generated method stub
		return firstList.get(position);
	}

	@Override
	public int getGroupCount() {
		// TODO Auto-generated method stub
		return firstList.size();
	}

	@Override
	public long getGroupId(int groupPosition) {
		// TODO Auto-generated method stub
		return groupPosition;
	}

	@Override
	public View getGroupView(int position, boolean flag, View convertView,
			ViewGroup group) {
		// TODO Auto-generated method stub
		FirstHolder holder = null;
		if (convertView == null) {
			holder = new FirstHolder();
			convertView = LayoutInflater.from(context).inflate(
					R.layout.first_lay, null);
			holder.first_arrow = (ImageView) convertView
					.findViewById(R.id.first_arrow);
			holder.first_image = (ImageView) convertView
					.findViewById(R.id.first_image);
			holder.first_title = (TextView) convertView
					.findViewById(R.id.first_title);
			convertView.setTag(holder);
		} else {
			holder = (FirstHolder) convertView.getTag();
		}
		FirstItem firstItem = firstList.get(position);
		holder.first_title.setText(firstItem.getTitle());
		return convertView;
	}

	@Override
	public boolean hasStableIds() {
		// TODO Auto-generated method stub
		return false;
	}

	@Override
	public boolean isChildSelectable(int arg0, int arg1) {
		// TODO Auto-generated method stub
		return true;
	}
}

class FirstHolder {
	TextView first_title;
	ImageView first_image;
	ImageView first_arrow;
}

class SecondHolder {
	TextView second_title;
	ImageView second_arrow;
}

package com.zkq.adapter;

import java.util.List;

import com.example.teltest.R;
import com.zkq.activity.MainActivity;
import com.zkq.model.FirstItem;
import com.zkq.model.SecondItem;
import com.zkq.model.ThirdItem;
import com.zkq.util.Constants;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.AbsListView;
import android.widget.Toast;
import android.widget.ExpandableListView.OnChildClickListener;
import android.widget.ExpandableListView.OnGroupCollapseListener;
import android.widget.ExpandableListView.OnGroupExpandListener;
import android.widget.ImageView;
import android.widget.TextView;

public class ExpandAdapter2 extends BaseExpandableListAdapter {

	private Context context;
	private List<FirstItem> firstList;

	private int cpostion;
	private int gposition;
	private ExpandableListView treeView;
	private OnChildClickListener stvClickEvent;//外部回调函数
	private int secondlength;

	// private List<SecondItem> secondList;

	public ExpandAdapter2(Context context, List<FirstItem> firstList,
			int cposition, int gposition, ExpandableListView treeView,OnChildClickListener stvClickEvent) {
		// TODO Auto-generated constructor stub
		this.context = context;
		this.firstList = firstList;
		this.cpostion = cposition;
		this.gposition = gposition;
		this.treeView = treeView;
		this.stvClickEvent=stvClickEvent;
		// this.secondList = secondList;
	}

	@Override
	public Object getChild(int groupPosition, int childPosition) {
		// TODO Auto-generated method stub
		return firstList.get(gposition).getSecondItems().get(groupPosition)
				.getThirdItems().get(childPosition);
	}

	public long getChildId(int groupPosition, int childPosition) {
		return childPosition;
	}

	@Override
	public View getChildView(int groupPosition, int childPosition,
			boolean isLastChild, View convertView, ViewGroup parent) {
		// TODO Auto-generated method stub
		ThirdViewHolder childViewHolder = null;
		if (convertView == null) {
			childViewHolder = new ThirdViewHolder();
			convertView = LayoutInflater.from(context).inflate(
					R.layout.third_lay, null);
			childViewHolder.third_name = (TextView) convertView
					.findViewById(R.id.third_name);
			childViewHolder.third_image = (ImageView) convertView
					.findViewById(R.id.third_image);
			childViewHolder.third_tel = (TextView) convertView
					.findViewById(R.id.third_tel);
			convertView.setTag(childViewHolder);
		} else {
			childViewHolder = (ThirdViewHolder) convertView.getTag();
		}
		ThirdItem thirdItem = firstList.get(gposition).getSecondItems()
				.get(groupPosition).getThirdItems().get(childPosition);
		childViewHolder.third_name.setText(thirdItem.getName());
		childViewHolder.third_tel.setText(thirdItem.getTel());
		//获取选中的内容
		treeView.setOnChildClickListener(new OnChildClickListener() {
			
			@Override
			public boolean onChildClick(ExpandableListView arg0, View arg1, int groupPosition,
					int childPosition, long arg4) {
				// TODO Auto-generated method stub
				String msg = "-ppp--"+gposition+"parent_id = " + groupPosition + " child_id = "
						+ childPosition;
				Toast.makeText(context, msg,
						Toast.LENGTH_SHORT).show();
				return false;
			}
		});
		return convertView;
	}

	@Override
	public int getChildrenCount(int position) {
		// TODO Auto-generated method stub
		return firstList.get(gposition).getSecondItems().get(position)
				.getThirdItems().size();
	}

	@Override
	public Object getGroup(int groupPosition) {
		return firstList.get(gposition).getSecondItems().get(groupPosition);
	}

	@Override
	public int getGroupCount() {
		// TODO Auto-generated method stub
		return firstList.get(gposition).getSecondItems().size();
	}

	@Override
	public long getGroupId(int position) {
		// TODO Auto-generated method stub
		return position;
	}

	@Override
	public View getGroupView(int position, boolean arg1, View convertView,
			ViewGroup arg3) {
		SecondHolder childViewHolder = null;
		if (convertView == null) {
			childViewHolder = new SecondHolder();
			convertView = LayoutInflater.from(context).inflate(
					R.layout.second_lay, null);
			childViewHolder.second_title = (TextView) convertView
					.findViewById(R.id.second_title);
			convertView.setTag(childViewHolder);
		} else {
			childViewHolder = (SecondHolder) convertView.getTag();
		}
		SecondItem secondItem = firstList.get(gposition).getSecondItems()
				.get(position);
		childViewHolder.second_title.setText(secondItem.getTitle());
		/***
		 * 展开监听
		 */
		treeView.setOnGroupExpandListener(new OnGroupExpandListener() {
			@Override
			public void onGroupExpand(int position) {
				// TODO Auto-generated method stub

				if (treeView.getChildCount() == firstList.get(gposition)
						.getSecondItems().size()) {
					if (secondlength > 0) {
						secondlength += firstList.get(gposition)
								.getSecondItems().get(position).getThirdItems()
								.size()
								* Constants.THIRD_ITEM_HEIGHT;
					} else {
						secondlength += firstList.get(gposition)
								.getSecondItems().size()
								* Constants.SECOND_ITEM_HEIGHT
								+ firstList.get(gposition).getSecondItems()
										.get(position).getThirdItems().size()
								* Constants.THIRD_ITEM_HEIGHT;
					}
				} else {
					secondlength += firstList.get(gposition).getSecondItems()
							.get(position).getThirdItems().size()
							* Constants.THIRD_ITEM_HEIGHT;
				}
				AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
						ViewGroup.LayoutParams.FILL_PARENT, secondlength);
				treeView.setLayoutParams(lp);
			}
		});
		// treeView.setOnGroupClickListener(new OnGroupClickListener() {
		// @Override
		// public boolean onGroupClick(ExpandableListView arg0, View arg1,
		// int position, long arg3) {
		// // TODO Auto-generated method stub
		// return false;
		// }
		// });
		/***
		 * 缩放监听
		 */
		treeView.setOnGroupCollapseListener(new OnGroupCollapseListener() {

			@Override
			public void onGroupCollapse(int position) {
				// TODO Auto-generated method stub

				secondlength -= firstList.get(gposition).getSecondItems()
						.get(position).getThirdItems().size()
						* Constants.THIRD_ITEM_HEIGHT;
				AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
						ViewGroup.LayoutParams.FILL_PARENT, secondlength);
				treeView.setLayoutParams(lp);
			}
		});
		return convertView;
	}

	@Override
	public boolean hasStableIds() {
		// TODO Auto-generated method stub
		return false;
	}

	@Override
	public boolean isChildSelectable(int arg0, int arg1) {
		// TODO Auto-generated method stub
		return true;
	}

	class ThirdViewHolder {
		ImageView third_image;
		TextView third_name;
		TextView third_tel;
	}

	class SecondViewHolder {
		TextView second_title;
		ImageView second_arrow;
	}

}

以下时三个实体类：

package com.zkq.model;

import java.util.List;

public class FirstItem {
	private int id;
	private String title;
	private String image;
	private List<SecondItem> secondItems;

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getTitle() {
		return title;
	}

	public void setTitle(String title) {
		this.title = title;
	}

	public String getImage() {
		return image;
	}

	public void setImage(String image) {
		this.image = image;
	}

	public List<SecondItem> getSecondItems() {
		return secondItems;
	}

	public void setSecondItems(List<SecondItem> secondItems) {
		this.secondItems = secondItems;
	}

}

package com.zkq.model;

import java.util.List;

public class SecondItem {
	private int id;
	private String title;
	private List<ThirdItem> thirdItems;

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getTitle() {
		return title;
	}

	public void setTitle(String title) {
		this.title = title;
	}

	public List<ThirdItem> getThirdItems() {
		return thirdItems;
	}

	public void setThirdItems(List<ThirdItem> thirdItems) {
		this.thirdItems = thirdItems;
	}
	

}

package com.zkq.model;

public class ThirdItem {
	private int id;
	private String name;
	private String tel;
	private String image;
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getTel() {
		return tel;
	}
	public void setTel(String tel) {
		this.tel = tel;
	}
	public String getImage() {
		return image;
	}
	public void setImage(String image) {
		this.image = image;
	}
	
}

常量

package com.zkq.util;

public class Constants {
	/**
	 * 第二级和第三级菜单的高度
	 */
	public static final int SECOND_ITEM_HEIGHT=115;
	public static final int THIRD_ITEM_HEIGHT=120;
}

本文转自mfrbuaa博客园博客，原文链接：http://www.cnblogs.com/mfrbuaa/p/5203812.html，如需转载请自行联系原作者

微信关注我们

原文链接：https://yq.aliyun.com/articles/357705

转载内容版权归作者及来源网站所有！

低调大师中文资讯倾力打造互联网数据资讯、行业资源、电子商务、移动互联网、网络营销平台。持续更新报道IT业界、互联网、市场资讯、驱动更新,是最及时权威的产业资讯及硬件资讯报道平台。

Android之自定义Dialog屏幕旋转时自动关闭解决方法

在android开发中很多使用会使用自定义的dialog，但是由于有的手机屏幕会选择，导致dialog自动消失掉，这里提供的解决方案是在AndroidManifest.xml中Activity标签添加如下代码 1 android:configChanges="orientation|keyboardHidden|screenSize" 原先2.3及以下的版本只需要 1 orientation|keyboardHidden 但是为了兼容4.0以上的版本需要配置"screenSize",就是如此简单。本文转自xuzw13 51CTO博客，原文链接：http://blog.51cto.com/xuzhiwei/1369198，如需转载请自行联系原作者

2017-11-08

579

1 2 做手机端的前端开发，少不了对手机平台的判断。如，对于app下载，就要判断在Android平台下就显示Android下载提示；在iOS平台下就显示iOS下载提示。 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 <scripttype= "text/javascript" > //手机端判断各个平台浏览器及操作系统平台 function checkPlatform(){ if (/android/i.test(navigator.userAgent)){ document.write( "ThisisAndroid'browser." ); //这是Android平台下浏览器 } if (/(iPhone|iPad|iPod|iOS)/i.test(navigator.userAgent)){ document.write( "ThisisiOS'browser." ); //这是iOS平台下浏览器 } if (/Linux/i.test(navigator.userAgent)){ do...

2017-11-08

616

资源下载

更多资源

优质分享App

近一个月的开发和优化，本站点的第一个app全新上线。该app采用极致压缩，本体才4.36MB。系统里面做了大量数据访问、缓存优化。方便用户在手机上查看文章。后续会推出HarmonyOS的适配版本。

Mario

马里奥是站在游戏界顶峰的超人气多面角色。马里奥靠吃蘑菇成长，特征是大鼻子、头戴帽子、身穿背带裤，还留着胡子。与他的双胞胎兄弟路易基一起，长年担任任天堂的招牌角色。

Spring

Spring框架（Spring Framework）是由Rod Johnson于2002年提出的开源Java企业级应用框架，旨在通过使用JavaBean替代传统EJB实现方式降低企业级编程开发的复杂性。该框架基于简单性、可测试性和松耦合性设计理念，提供核心容器、应用上下文、数据访问集成等模块，支持整合Hibernate、Struts等第三方框架，其适用范围不仅限于服务器端开发，绝大多数Java应用均可从中受益。

Rocky Linux

Rocky Linux（中文名：洛基）是由Gregory Kurtzer于2020年12月发起的企业级Linux发行版，作为CentOS稳定版停止维护后与RHEL（Red Hat Enterprise Linux）完全兼容的开源替代方案，由社区拥有并管理，支持x86_64、aarch64等架构。其通过重新编译RHEL源代码提供长期稳定性，采用模块化包装和SELinux安全架构，默认包含GNOME桌面环境及XFS文件系统，支持十年生命周期更新。