android 三级菜单 BaseExpandableListAdapter

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。

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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;

}

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