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:
代码语言：javascript复制<?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:
代码语言：javascript复制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。
