android 三级菜单 BaseExpandableListAdapter-低调大师

android 三级菜单 BaseExpandableListAdapter

2017-11-07 499

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

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

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