Android自定义上下文菜单

今天自定义了一个简单的Android菜单控件。实现方式是：PopupWindow和ListView。
现在来给大家分享一下源码：

SHContextMenu.java

核心代码部分：主要是对PopupWindow和ListView的初始化，为ListView设置数据源，以及封装了菜单的显示和隐藏的方法。还有提供了菜单的点击回调。

import android.app.Activity;
import android.content.Context;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.PopupWindow;
import android.widget.TextView;

import com.eroad.ehr.R;
import com.eroad.product.bean.ContextMenuItem;

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

/**
 * 自定义上下文菜单
 * Created by MaJian on 16/4/28.
 */
public class SHContextMenu {
   
   

    private Context mContext;
    private List<ContextMenuItem> itemList;
    private PopupWindow popupWindow;
    private View contentView;
    private ListView mLvMenuList;
    private MenuAdapter menuAdapter;
    private OnItemSelectListener onItemSelectListener;

    public interface OnItemSelectListener{
   
   
        void onItemSelect(int position);
    }

    public void setOnItemSelectListener(OnItemSelectListener onItemSelectListener){
        this.onItemSelectListener = onItemSelectListener;
    }

    public SHContextMenu(Context mContext){
        this.mContext = mContext;
        itemList = new ArrayList<>();
        initPopWindow();
    }

    /**
     * 初始化popwindow菜单
     */
    private void initPopWindow(){
        contentView = LayoutInflater.from(mContext).inflate(R.layout.popwindow_menu, null);
        popupWindow = new PopupWindow(contentView, ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        popupWindow.setFocusable(true);
        popupWindow.setOutsideTouchable(true);
        // 这个是为了点击“返回Back”也能使其消失，并且并不会影响你的背景
        popupWindow.setBackgroundDrawable(new BitmapDrawable());
        popupWindow.setAnimationStyle(R.style.PopupAnimation);
        mLvMenuList = (ListView) contentView.findViewById(R.id.lv_menu);
        menuAdapter = new MenuAdapter();
        mLvMenuList.setAdapter(menuAdapter);
        mLvMenuList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                if (onItemSelectListener != null){
                    onItemSelectListener.onItemSelect(position);
                }
                popupWindow.dismiss();
            }
        });
    }

    /**
     * 设置菜单列表数据源
     * @param itemList
     */