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

主页面布局文件activity_main.xml

style文件

 
  
    0dp
    40dp
    1
    40dp
    1000dp
  
  
  
    1dp
    25dp
    #dcdcdc
    center_vertical
  

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 data_list1;
  private List data_list2;
  private List 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 mDataList;

    MyAdapter(List 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。