小编给大家分享一下Android如何实现美团下拉功能，相信大部分人都还不怎么了解，因此分享这篇文章给大家参考一下，希望大家阅读完这篇文章后大有收获，下面让我们一起去了解一下吧！
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具体内容如下
效果图
实现
布局文件:
Activity代码:
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 < len; ++i) {
map1 = new HashMap();
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 < len; ++i) {
map2 = new HashMap();
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 < len; ++i) {
map3 = new HashMap();
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 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();
}
}
});
}
}以上是“Android如何实现美团下拉功能”这篇文章的所有内容，感谢各位的阅读！相信大家都有了一定的了解，希望分享的内容对大家有所帮助，如果还想学习更多知识，欢迎关注创新互联行业资讯频道！
本文标题：Android如何实现美团下拉功能-创新互联
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