Android实现美团下拉功能

<?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>

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();        }      }    });  }}