Android仿美团分类下拉菜单实例代码

本文实例为大家分享了android仿美团下拉菜单的实现代码，分类进行选择，供大家参考，具体内容如下

效果图

操作平台

as2.0
第三方框架：butterknife
build.gradle

dependencies {
compile filetree(dir: 'libs', include: ['*.jar'])
testcompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.4.0'
compile 'com.jakewharton:butterknife:7.0.1'
}

实现代码

1、实现逻辑：主要利用spinner与baseadapter来实现菜单下拉。具体美观效果要靠各个控件的调整，以及必要的分割线添加。
2、核心代码

适配器的item代码：item_main.xml

<?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:orientation="vertical"
  >

  <textview
    android:id="@+id/item_main_tv"
    android:layout_width="match_parent"
    android:layout_height="40dp"
    android:layout_marginleft="16dp"
    android:background="#fff"
    android:gravity="center_vertical"
    android:singleline="true"
    android:text="测试文字"
    android:textsize="15dp"
    />
  <!--分割线-->
  <textview
    android:id="@+id/main_tv_line"
    android:layout_width="match_parent"
    android:layout_height="1dp"
    android:layout_marginleft="16dp"
    android:layout_marginright="16dp"
    android:background="#edecec"/>
</linearlayout>

主页面布局文件activity_main.xml

<?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:orientation="vertical"
  >

  <linearlayout
    android:layout_width="match_parent"
    android:layout_height="40dp"
    >

    <spinner
      android:id="@+id/main_sp1"
      style="@style/style_spinner">
    </spinner>
    <!--这个是spinner之间的分割线-->
    <imageview
      style="@style/style_mian_verline"/>


    <spinner
      android:id="@+id/main_sp2"
      style="@style/style_spinner"
      ></spinner>

    <imageview
      style="@style/style_mian_verline"/>


    <spinner
      android:id="@+id/main_sp3"
      style="@style/style_spinner"
      ></spinner>

  </linearlayout>


  <!--设置一条分割线-->
  <textview
    android:layout_width="match_parent"
    android:layout_height="1dp"
    android:background="#dcdcdc"
    />

  <linearlayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#ffffff">

    <textview
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:gravity="center"
      android:text="我是分类下面的正文内容"/>
  </linearlayout>
</linearlayout>

style文件

 <!--spinner的样式-->
  <style name="style_spinner">
    <item name="android:layout_width">0dp</item>
    <item name="android:layout_height">40dp</item>
    <item name="android:layout_weight">1</item>
    <item name="android:dropdownverticaloffset">40dp</item>
    <item name="android:dropdownwidth">1000dp</item>
  </style>
  <!--定义spinner之间的线的样式-->
  <style name="style_mian_verline">
    <item name="android:layout_width">1dp</item>
    <item name="android:layout_height">25dp</item>
    <item name="android:background">#dcdcdc</item>
    <item name="android:layout_gravity">center_vertical</item>
  </style>

mainactivity与适配器写在了一起，便于操作

public class mainactivity extends appcompatactivity {
  @bind(r.id.main_sp1)
  spinner mmainsp1;
  @bind(r.id.main_sp2)
  spinner mmainsp2;
  @bind(r.id.main_sp3)
  spinner mmainsp3;
  private list<string> data_list1;
  private list<string> data_list2;
  private list<string> data_list3;


  private baseadapter arr_adapter;//适配器

  @override
  protected void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.activity_main);
    butterknife.bind(this);
    initdata();
    initadapter();
    setlistener();
  }

  //设置监听事件，将来商家列表的排序都在这里面处理
  private void setlistener() {
    mmainsp1.setonitemselectedlistener(new adapterview.onitemselectedlistener() {
      @override
      public void onitemselected(adapterview<?> parent, view view, int position, long id) {
        toast.maketext(mainactivity.this, "点击了"+data_list1.get(position), toast.length_short).show();
      }

      @override
      public void onnothingselected(adapterview<?> parent) {

      }
    });

    mmainsp2.setonitemselectedlistener(new adapterview.onitemselectedlistener() {
      @override
      public void onitemselected(adapterview<?> parent, view view, int position, long id) {
        toast.maketext(mainactivity.this, "点击了"+data_list2.get(position), toast.length_short).show();
      }

      @override
      public void onnothingselected(adapterview<?> parent) {

      }
    });

    mmainsp3.setonitemselectedlistener(new adapterview.onitemselectedlistener() {
      @override
      public void onitemselected(adapterview<?> parent, view view, int position, long id) {
        toast.maketext(mainactivity.this, "点击了"+data_list3.get(position), toast.length_short).show();
      }

      @override
      public void onnothingselected(adapterview<?> parent) {

      }
    });
  }

  private void initadapter() {
    //适配器
    arr_adapter = new myadapter(data_list1);
    mmainsp1.setadapter(arr_adapter);

    //适配器
    arr_adapter = new myadapter(data_list2);
    mmainsp2.setadapter(arr_adapter);

    //适配器
    arr_adapter = new myadapter(data_list3);
    mmainsp3.setadapter(arr_adapter);

  }

  //设置数据来源，这个要在网络获取。由于数据不会太多，不再考虑性能优化问题
  private void initdata() {
    //数据
    data_list1 = new arraylist<>();
    data_list1.add("全部分类");
    data_list1.add("零食");
    data_list1.add("水果");
    data_list1.add("洗衣");
    data_list1.add("洗车");
    data_list1.add("茶饮");

    //数据
    data_list2 = new arraylist<>();
    data_list2.add("商圈");
    data_list2.add("郑州航院");
    data_list2.add("华北水利水电大学");
    data_list2.add("河南中医大学");
    data_list2.add("河南财经大学");

    //数据
    data_list3 = new arraylist<>();
    data_list3.add("智能排序");
    data_list3.add("好评优先");
    data_list3.add("离我最近");
    data_list3.add("价格最低");
  }


  //适配器
  class myadapter extends baseadapter {
    private layoutinflater mlayoutinflater;
    private list<string> mdatalist;

    myadapter(list<string> datalist) {
      this.mdatalist = datalist;
      mlayoutinflater = layoutinflater.from(mainactivity.this);
    }

    @override
    public int getcount() {
      return mdatalist.size();
    }

    @override
    public object getitem(int position) {
      return mdatalist.get(position);
    }

    @override
    public long getitemid(int position) {
      return position;
    }

    //数据不太多，没有使用viewholder进行处理。
    @override
    public view getview(int position, view convertview, viewgroup parent) {
      convertview = view.inflate(mainactivity.this, r.layout.item_main, null);
      textview textview = (textview) convertview.findviewbyid(r.id.item_main_tv);
      textview.settext(mdatalist.get(position));
      return convertview;
    }
  }


}

以上就是本文的全部内容，希望对大家学习android软件编程有所帮助。