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;
    }
  }


}

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