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

xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical"

>

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"

/>

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"/>

主页面布局文件activity_main.xml

xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical"

>

android:layout_width="match_parent"

android:layout_height="40dp"

>

android:id="@+id/main_sp1"

style="@style/style_spinner">

style="@style/style_mian_verline"/>

android:id="@+id/main_sp2"

style="@style/style_spinner"

>

style="@style/style_mian_verline"/>

android:id="@+id/main_sp3"

style="@style/style_spinner"

>

android:layout_width="match_parent"

android:layout_height="1dp"

android:background="#dcdcdc"

/>

android:layout_width="match_parent"

android:layout_height="match_parent"

android:background="#ffffff">

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"/>

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。