本文实例为大家分享了Android实现美团下拉功能的具体代码，供大家参考，具体内容如下

效果图

实现

布局文件:

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#f0f0f0" android:orientation="vertical" > <FrameLayout android:id="@+id/titlebar_layout" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="#5555" > <RelativeLayout android:layout_width="match_parent" android:layout_height="50dp" android:background="#ffffff" android:gravity="center_vertical" android:orientation="horizontal" > <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_centerVertical="true" android:layout_marginLeft="5dp" android:gravity="center_vertical" > <ImageView android:layout_width="25dp" android:layout_height="25dp" android:onClick="back" android:src="@mipmap/icon_arrow_green" /> <TextView android:id="@+id/supplier_list_title_tv" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="5dp" android:text="全部" android:textColor="#39ac69" android:textSize="18dp" /> </LinearLayout> <ImageView android:id="@+id/supplier_list_cart_iv" android:layout_width="25dp" android:layout_height="25dp" android:layout_alignParentRight="true" android:layout_centerVertical="true" android:layout_marginRight="15dp" android:src="@mipmap/icon_car" /> </RelativeLayout> </FrameLayout> <View android:layout_width="match_parent" android:layout_height="1dp" android:background="#E2E2E2" /> <LinearLayout android:layout_width="match_parent" android:layout_height="40dp" android:background="#ffffff" android:orientation="horizontal" > <LinearLayout android:id="@+id/supplier_list_product" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:gravity="center" android:orientation="horizontal" > <TextView android:id="@+id/supplier_list_product_tv" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center" android:text="全部" android:textSize="14dp" /> <ImageView android:layout_width="25dp" android:layout_height="25dp" android:src="@mipmap/icon_arrow_down" /> </LinearLayout> <LinearLayout android:id="@+id/supplier_list_sort" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:gravity="center" android:orientation="horizontal" > <TextView android:id="@+id/supplier_list_sort_tv" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center" android:text="综合排序" android:textSize="14dp" /> <ImageView android:layout_width="25dp" android:layout_height="25dp" android:src="@mipmap/icon_arrow_down" /> </LinearLayout> <LinearLayout android:id="@+id/supplier_list_activity" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:gravity="center" android:orientation="horizontal" > <TextView android:id="@+id/supplier_list_activity_tv" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center" android:text="优惠活动" android:textSize="14dp" /> <ImageView android:layout_width="25dp" android:layout_height="25dp" android:src="@mipmap/icon_arrow_down" /> </LinearLayout> </LinearLayout> <View android:layout_width="match_parent" android:layout_height="0.5dp" android:background="#E2E2E2" /> <RelativeLayout android:layout_width="match_parent" android:layout_height="match_parent" > <ListView android:id="@+id/supplier_list_lv" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_marginTop="10dp" android:cacheColorHint="@android:color/transparent" android:divider="#f0f0f0" android:dividerHeight="10dp" android:fadingEdge="none" android:listSelector="#00000000" android:scrollbarStyle="outsideOverlay" android:scrollingCache="false" /> <ProgressBar android:id="@+id/progress" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:indeterminateDrawable="@drawable/shape_progress" android:indeterminateDuration="1000" /> </RelativeLayout></LinearLayout><?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="#ffffff" android:orientation="vertical" > <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center_vertical" android:orientation="horizontal" > <TextView android:id="@+id/listview_popwind_tv" android:layout_width="match_parent" android:layout_height="45dp" android:layout_marginLeft="15dp" android:layout_marginRight="15dp" android:gravity="center_vertical" android:text="地点" android:textColor="#5a5959" android:textSize="18dp" /> </LinearLayout> <View android:layout_width="match_parent" android:layout_height="1dp" android:layout_marginLeft="15dp" android:layout_marginRight="15dp" android:background="#E2E2E2" /></LinearLayout><?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#5000" android:orientation="vertical" > <ListView android:id="@+id/popwin_supplier_list_lv" android:layout_width="match_parent" android:layout_height="wrap_content" android:cacheColorHint="@android:color/transparent" android:divider="#0000" android:dividerHeight="0dp" android:fadingEdge="none" android:listSelector="#00000000" android:scrollbarStyle="outsideOverlay" android:scrollbars="none" android:scrollingCache="false" /> <LinearLayout android:id="@+id/popwin_supplier_list_bottom" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" android:orientation="vertical" /></LinearLayout>

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<Map<String, String>> 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<Map<String, String>>(); String[] menuStr1 = new String[] { "全部", "粮油", "衣服", "图书", "电子产品", "酒水饮料", "水果" }; Map<String, String> map1; for (int i = 0, len = menuStr1.length; i < len; ++i) { map1 = new HashMap<String, String>(); map1.put("name", menuStr1[i]); menuData1.add(map1); } menuData2 = new ArrayList<Map<String, String>>(); String[] menuStr2 = new String[] { "综合排序", "配送费最低" }; Map<String, String> map2; for (int i = 0, len = menuStr2.length; i < len; ++i) { map2 = new HashMap<String, String>(); map2.put("name", menuStr2[i]); menuData2.add(map2); } menuData3 = new ArrayList<Map<String, String>>(); String[] menuStr3 = new String[] { "优惠活动", "特价活动", "免配送费", "可在线支付" }; Map<String, String> map3; for (int i = 0, len = menuStr3.length; i < len; ++i) { map3 = new HashMap<String, String>(); 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(); } } }); }}

其实和我博客里面有一篇自定义Spinner很像

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。