仿百度糯米/美团二级菜单

好久没有打开我的CSDN博客了，也是因为年龄一年年大了，生活压力大了，思考的事情已经不在项目上了，最近看见有人给我csdn上留言，说我好久没有更新CSDN了，我刚好最近在开发一个商城项目，实现了一个简单的控件，就和大家一起分享一下。
控件的效果就是类似百度糯米或者美团的二级菜单，我开发iOS的客户端菜单功能，直接参考了git一个项目，对应的UI效果：

其实效果看起来还不错。iOS开发完成以后，又要准备开发Android，发现对应网上的案例还是很少的，或者不是想要的效果。我想参考了别人的项目代码，也为开源项目做点贡献，准备自己开发一个Android的menu项目；
折腾了大概三个小时，终于搞定了，效果如下：

从图片不难看出，这是一个多级菜单，控制者填充数据源，所以实现的时候，尽量封装的使用，使用者最好是能两三行代码搞定。

具体实现思路：
1、MenuView，实现了第一级菜单的封装

①、view初始化和数据源定义；

②、绘制一级菜单；

③、控制子菜单的PopupWindow弹出框
代码具体如下：

package com.spring.sky.menuproject.view;import android.content.Context;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.TextView;import com.spring.sky.menuproject.AppInfoUtils;
import com.spring.sky.menuproject.R;import java.util.List;/*** Created by springsky on 16/10/24.*/public class MenuView extends LinearLayout implements View.OnClickListener, MenuPopupWindow.OnMenuListener {private String[] hintTexts;public List[] dataSource;public TextView[] textViews;private int textColor = R.color.gray_80;private int textColorSelected = R.color.orange;private int textSize;private int lineHeight ;private MenuPopupWindow menuPopupWindow;private OnMenuListener onMenuListener;View lineView;TextView lastTv;private IndexPath[] indexPaths;public MenuView(Context context) {super(context);init(context);}public MenuView(Context context, AttributeSet attrs) {super(context, attrs);init(context);}public MenuView(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);init(context);}public void setHintTexts(String[] hintTexts) {this.hintTexts = hintTexts;}public void setDataSource(List[] dataSource) {this.dataSource = dataSource;reloadData();}/**** 设置当前选中的数据* @param indexPath*/public void setIndexPath(IndexPath indexPath) {setIndexPath(indexPath, false);}/**** 设置当前选中的内容* @param indexPath* @param actionMenu 是否通知监听器*/public void setIndexPath(IndexPath indexPath, boolean actionMenu) {indexPaths[indexPath.column] = indexPath;if (actionMenu) {TextView lastTv = textViews[indexPath.column];List<MenuModel> list = dataSource[indexPath.column];if(list == null || indexPath.row >= list.size()){return;}MenuModel left = list.get(indexPath.row);MenuModel menuModel = null;if (indexPath.item < 0) {menuModel = left;} else {MenuModel right = left.chindMenu.get(indexPath.item);menuModel = right;}lastTv.setText(menuModel.value);if (onMenuListener != null) {onMenuListener.onMenu(indexPath, menuModel);}}}public List[] getDataSource() {return dataSource;}/**** 初始化* @param context*/private void init(Context context) {menuPopupWindow = new MenuPopupWindow(context);menuPopupWindow.setOnMenuListener(this);AppInfoUtils.getViewHeight(this);textSize = AppInfoUtils.spToPx(6);lineHeight = AppInfoUtils.dipToPx(1);}/**** 绘制一级菜单分类*/private void reloadData() {removeAllViews();if (dataSource == null || dataSource.length < 1) {return;}int count = dataSource.length;int height = getMeasuredHeight() - lineHeight;setOrientation(LinearLayout.VERTICAL);LinearLayout menuBaseView = new LinearLayout(getContext());menuBaseView.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, height));menuBaseView.setWeightSum(count);menuBaseView.setGravity(Gravity.CENTER);menuBaseView.setOrientation(LinearLayout.HORIZONTAL);indexPaths = new IndexPath[count];textViews = new TextView[count];for (int i = 0; i < count; i++) {indexPaths[i] = new IndexPath(i, 0, -1);LinearLayout tempBaseView = new LinearLayout(getContext());tempBaseView.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, height, 1));tempBaseView.setGravity(Gravity.CENTER);TextView tv = new TextView(getContext());tv.setTextColor(getResources().getColor(textColor));tv.setTextSize(textSize);LinearLayout.LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT);tv.setGravity(Gravity.CENTER);tv.setLayoutParams(params);tv.setMaxLines(1);tv.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.mipmap.triangle_down, 0);tv.setCompoundDrawablePadding(AppInfoUtils.dipToPx(2));tv.setId(i);tv.setOnClickListener(this);textViews[i] = tv;tempBaseView.addView(tv);menuBaseView.addView(tempBaseView);if (hintTexts != null && i < hintTexts.length) {tv.setText(hintTexts[i]);}View lineView = new View(getContext());lineView.setBackgroundColor(getResources().getColor(R.color.main_bg_in));menuBaseView.addView(lineView, new LayoutParams(AppInfoUtils.dipToPx(1), height - AppInfoUtils.dipToPx(8)));}addView(menuBaseView);lineView = new View(getContext());lineView.setBackgroundColor(getResources().getColor(R.color.main_bg_in));addView(lineView, new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, lineHeight));}/**** 一级菜单点击事件触发* @param v*/@Overridepublic void onClick(View v) {lastTv = (TextView) v;int column = v.getId();List<MenuModel> list = dataSource[column];lastTv.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.mipmap.triangle_up, 0);lastTv.setTextColor(getResources().getColor(textColorSelected));menuPopupWindow.setLeftList(column, list);IndexPath indexPath = indexPaths[column];menuPopupWindow.setSelect(indexPath.row, indexPath.item);
//        int[] location = new int[2];
//        lineView.getLocationOnScreen(location);menuPopupWindow.showAsDropDown(lineView);
//        menuPopupWindow.showAtLocation(this,Gravity.BOTTOM,0,0);}/**** 弹出框点击事件处理* @param column* @param row* @param item* @param menuModel*/@Overridepublic void onMenu(int column, int row, int item, MenuModel menuModel) {TextView lastTv = textViews[column];lastTv.setText(menuModel.value);IndexPath indexPath = indexPaths[column];indexPath.row = row;indexPath.item = item;onMenuDismiss();if (onMenuListener != null) {onMenuListener.onMenu(indexPath, menuModel);}}/**** 弹出框关闭*/@Overridepublic void onMenuDismiss() {lastTv.setTextColor(getResources().getColor(R.color.gray_80));lastTv.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.mipmap.triangle_down, 0);}/**** 设置监听器* @param onMenuListener*/public void setOnMenuListener(OnMenuListener onMenuListener) {this.onMenuListener = onMenuListener;}public static interface OnMenuListener {void onMenu(IndexPath indexPath, MenuModel menuModel);}/***** 菜单列、行、二级子行*/public static class IndexPath {public int column; //一级菜单public int row; //left rowpublic int item; //right rowpublic IndexPath(int column, int row, int item) {this.column = column;this.row = row;this.item = item;}}
}

2、PopupWIndow主要是实现了弹出框显示子列的一级和二级菜单的数据。

我使用了两个ListView来动态实现数据的加载。

具体代码如下：

package com.spring.sky.menuproject.view;import android.content.Context;
import android.graphics.drawable.PaintDrawable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.AdapterView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.PopupWindow;import com.spring.sky.menuproject.R;import java.util.List;/*** Created by springsky on 16/10/20.*/public class MenuPopupWindow extends PopupWindow implements AdapterView.OnItemClickListener {Context mContext;private ListView leftLv,rightLv;private OnMenuListener onMenuListener;private List<MenuModel> leftList,rightList;private MenuAdapter menuLeftAdapter,menuRightAdapter;private int column;boolean hasSecond;/**** 初始化* @param context*/public MenuPopupWindow(Context context){this.mContext = context;View view = LayoutInflater.from(mContext).inflate(R.layout.menu_popup_window, null);leftLv = (ListView) view.findViewById(R.id.leftLv);leftLv.setChoiceMode(ListView.CHOICE_MODE_SINGLE);rightLv = (ListView) view.findViewById(R.id.rightLv);rightLv.setChoiceMode(ListView.CHOICE_MODE_SINGLE);setContentView(view);setBackgroundDrawable(new PaintDrawable());setFocusable(true);setWidth(ViewGroup.LayoutParams.MATCH_PARENT);setHeight(LinearLayout.LayoutParams.WRAP_CONTENT);setOnDismissListener(new PopupWindow.OnDismissListener() {@Overridepublic void onDismiss() { leftLv.setSelection(0);rightLv.setSelection(0);if( onMenuListener != null ){onMenuListener.onMenuDismiss();}}});menuLeftAdapter = new MenuAdapter(mContext);menuLeftAdapter.setColumn(0);menuLeftAdapter.setList(leftList);leftLv.setAdapter(menuLeftAdapter);leftLv.setOnItemClickListener(this);menuRightAdapter = new MenuAdapter(mContext);menuRightAdapter.setColumn(1);menuRightAdapter.setList(rightList);rightLv.setAdapter(menuRightAdapter);rightLv.setOnItemClickListener(this);}@Overridepublic void showAsDropDown(View anchor) {super.showAsDropDown(anchor);}/**** 加载数据* @param column* @param leftList*/public void setLeftList(int column,List<MenuModel> leftList) {this.column = column;this.leftList = leftList;hasSecond = false;for (MenuModel childModel : leftList){if(childModel.hasChind()){hasSecond = true;break;}}menuLeftAdapter.setList(leftList);if(!hasSecond){rightLv.setVisibility(View.GONE);setRightList(null);}else {rightLv.setVisibility(View.VISIBLE);}}/**** 默认选中的一级和二级行* @param row* @param item*/public void setSelect(int row,int item){if(row < 0 || leftList == null || row >= leftList.size()){return;}MenuModel leftModel = leftList.get(row);leftLv.setSelection(row);menuLeftAdapter.setSelectPosition(row);setRightList(leftModel.chindMenu);if(item < 0 || rightList ==null || item >= rightList.size()){return;}rightLv.setSelection(item);menuRightAdapter.setSelectPosition(item);}private void setRightList(List<MenuModel> rightList) {this.rightList = rightList;menuRightAdapter.setList(rightList);}@Overridepublic void onItemClick(AdapterView<?> parent, View view, int position, long id) {if(parent.getId() == leftLv.getId()){MenuModel model = leftList.get(position);if(leftLv.getSelectedItemPosition() == position){return;}if(model.hasChind()){menuLeftAdapter.setSelectPosition(position);setRightList(model.chindMenu);}else {dismiss();}onMenuClick(position,0,model);}else {menuRightAdapter.setSelectPosition(position);MenuModel model = rightList.get(position);onMenuClick(menuLeftAdapter.getSelectPosition(),position,model);dismiss();}}void onMenuClick(int row,int item,MenuModel model){if(onMenuListener != null){onMenuListener.onMenu(column,row,item,model);}}public void setOnMenuListener(OnMenuListener onMenuListener) {this.onMenuListener = onMenuListener;}public static interface OnMenuListener{void onMenu(int column, int row, int item, MenuModel menuModel);void onMenuDismiss();}}

3、其他的就是MenuModel，考虑是多级层次关系，所以建议使用链结构。

package com.spring.sky.menuproject.view;import java.util.List;/*** Created by springsky on 16/10/20.*/public class MenuModel {public Object key; //keypublic String value; //显示的内容public List<MenuModel> chindMenu; //子列表数据public MenuModel(){super();}public MenuModel(Object key, String value, List<MenuModel> chindMenu){super();this.key = key;this.value = value;this.chindMenu = chindMenu;}/**** 是否有子列表数据* @return*/public boolean hasChind(){return (chindMenu != null && chindMenu.size() > 0);}
}

诶，生活压力大了，也不会写博客了，就简单描述一下，希望大家不要见怪。
项目的源码，我已经提交到git上了。
下载地址：https://github.com/skyfouk/AndroidMenuProject.git

希望大家继续完善

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