Android实现美团下拉功能

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package com.example.hfs.popwindowmeituan;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;


import android.app.Activity;
import android.content.Intent;
import android.graphics.Color;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.PopupWindow;
import android.widget.ProgressBar;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.PopupWindow.OnDismissListener;

public class MainActivity extends Activity implements
    OnClickListener {
  private ListView listView, popListView;
  private ProgressBar progressBar;
  private List> menuData1, menuData2, menuData3;
  private PopupWindow popMenu;
  private SimpleAdapter menuAdapter1, menuAdapter2, menuAdapter3;

  private LinearLayout product, sort, activity;
  private ImageView cartIv;
  private TextView productTv, sortTv, activityTv, titleTv;
  private int green, grey;

  private String currentProduct, currentSort, currentActivity;
  private int menuIndex = 0;

  private Intent intent;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_supplier_list);
    findView();
    initMenuData();
    initPopMenu();

  }
  private void initMenuData() {
    menuData1 = new ArrayList>();
    String[] menuStr1 = new String[] { "全部", "粮油", "衣服", "图书", "电子产品",
        "酒水饮料", "水果" };
    Map map1;
    for (int i = 0, len = menuStr1.length; i ();
      map1.put("name", menuStr1[i]);
      menuData1.add(map1);
    }

    menuData2 = new ArrayList>();
    String[] menuStr2 = new String[] { "综合排序", "配送费最低" };
    Map map2;
    for (int i = 0, len = menuStr2.length; i ();
      map2.put("name", menuStr2[i]);
      menuData2.add(map2);
    }

    menuData3 = new ArrayList>();
    String[] menuStr3 = new String[] { "优惠活动", "特价活动", "免配送费",
        "可在线支付" };
    Map map3;
    for (int i = 0, len = menuStr3.length; i ();
      map3.put("name", menuStr3[i]);
      menuData3.add(map3);
    }
  }
  @Override
  public void onClick(View v) {
    // TODO Auto-generated method stub
    switch (v.getId()) {
      case R.id.supplier_list_product:
        productTv.setTextColor(Color.parseColor("#39ac69"));
        popListView.setAdapter(menuAdapter1);
        popMenu.showAsDropDown(product, 0, 2);
        menuIndex = 0;
        break;
      case R.id.supplier_list_sort:
        sortTv.setTextColor(Color.parseColor("#39ac69"));
        popListView.setAdapter(menuAdapter2);
        popMenu.showAsDropDown(product, 0, 2);
        menuIndex = 1;
        break;
      case R.id.supplier_list_activity:
        activityTv.setTextColor(Color.parseColor("#39ac69"));
        popListView.setAdapter(menuAdapter3);
        popMenu.showAsDropDown(product, 0, 2);
        menuIndex = 2;
        break;

    }
  }
  protected void findView() {
    listView = (ListView) findViewById(R.id.supplier_list_lv);
    product = (LinearLayout) findViewById(R.id.supplier_list_product);
    sort = (LinearLayout) findViewById(R.id.supplier_list_sort);
    activity = (LinearLayout) findViewById(R.id.supplier_list_activity);
    productTv = (TextView) findViewById(R.id.supplier_list_product_tv);
    sortTv = (TextView) findViewById(R.id.supplier_list_sort_tv);
    activityTv = (TextView) findViewById(R.id.supplier_list_activity_tv);
    titleTv = (TextView) findViewById(R.id.supplier_list_title_tv);
    cartIv = (ImageView) findViewById(R.id.supplier_list_cart_iv);
    progressBar = (ProgressBar) findViewById(R.id.progress);

    product.setOnClickListener(this);
    sort.setOnClickListener(this);
    activity.setOnClickListener(this);
    cartIv.setOnClickListener(this);
  }
  private void initPopMenu() {
    initMenuData();
    View cOntentView= View.inflate(this, R.layout.popwin_supplier_list,
        null);
    popMenu = new PopupWindow(contentView,
        LinearLayout.LayoutParams.MATCH_PARENT,
        LinearLayout.LayoutParams.MATCH_PARENT);
    popMenu.setOutsideTouchable(true);
    popMenu.setBackgroundDrawable(new BitmapDrawable());
    popMenu.setFocusable(true);
    popMenu.setAnimationStyle(R.style.popwin_anim_style);
    popMenu.setOnDismissListener(new OnDismissListener() {
      public void onDismiss() {
        productTv.setTextColor(Color.parseColor("#5a5959"));
        sortTv.setTextColor(Color.parseColor("#5a5959"));
        activityTv.setTextColor(Color.parseColor("#5a5959"));
      }
    });

    popListView = (ListView) contentView
        .findViewById(R.id.popwin_supplier_list_lv);
    contentView.findViewById(R.id.popwin_supplier_list_bottom)
        .setOnClickListener(new OnClickListener() {
          public void onClick(View arg0) {
            popMenu.dismiss();
          }
        });
    menuAdapter1 = new SimpleAdapter(this, menuData1,
        R.layout.item_listview_popwin, new String[] { "name" },
        new int[] { R.id.listview_popwind_tv });
    menuAdapter2 = new SimpleAdapter(this, menuData2,
        R.layout.item_listview_popwin, new String[] { "name" },
        new int[] { R.id.listview_popwind_tv });
    menuAdapter3 = new SimpleAdapter(this, menuData3,
        R.layout.item_listview_popwin, new String[] { "name" },
        new int[] { R.id.listview_popwind_tv });

    popListView.setOnItemClickListener(new OnItemClickListener() {
      public void onItemClick(AdapterView<&＃63;> arg0, View arg1, int pos,
                  long arg3) {
        popMenu.dismiss();
        if (menuIndex == 0) {
          currentProduct = menuData1.get(pos).get("name");
          titleTv.setText(currentProduct);
          productTv.setText(currentProduct);
          Toast.makeText(MainActivity.this, currentProduct, Toast.LENGTH_SHORT).show();
        } else if (menuIndex == 1) {
          currentSort = menuData2.get(pos).get("name");
          titleTv.setText(currentSort);
          sortTv.setText(currentSort);
          Toast.makeText(MainActivity.this, currentSort, Toast.LENGTH_SHORT).show();
        } else {
          currentActivity = menuData3.get(pos).get("name");
          titleTv.setText(currentActivity);
          activityTv.setText(currentActivity);
          Toast.makeText(MainActivity.this, currentActivity, Toast.LENGTH_SHORT).show();
        }
      }
    });
  }
}