1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout
 3     xmlns:android="http://schemas.android.com/apk/res/android"
 4     xmlns:tools="http://schemas.android.com/tools"
 5     android:layout_width="match_parent"
 6     android:layout_height="match_parent"
 7     android:orientation="vertical"
 8     tools:context="com.hs.example.exampleapplication.SpinnerActivity">
 9 
10     <Spinner
11         android:id="@+id/drink"
12         android:layout_width="match_parent"
13         android:layout_height="wrap_content">
14 
15     </Spinner>
16 
17     <Spinner
18         android:id="@+id/temp"
19         android:layout_width="match_parent"
20         android:layout_height="wrap_content">
21 
22 
23     </Spinner>
24 
25     <Button
26         android:gravity="center"
27         android:layout_width="match_parent"
28         android:layout_height="wrap_content"
29         android:onClick="ShowOrder"
30         android:text="下订单"/>
31 
32     <TextView
33         android:id="@+id/Text_order"
34         android:layout_width="match_parent"
35         android:layout_height="match_parent"
36         android:text=""/>
37 
38 </LinearLayout>

 1 public class SpinnerActivity extends AppCompatActivity implements AdapterView.OnItemSelectedListener{
 2 
 3     Spinner drink , temp;
 4     TextView order;
 5     String [] drinks = {"珍珠奶茶","波霸奶茶","丝袜奶茶","金桔柠檬"};
 6     String [] tempSele1 = {"加冰","去冰","常温"};
 7     String [] tempSele2 = {"加冰","去冰"};
 8 
 9     @Override
10     protected void onCreate(Bundle savedInstanceState) {
11         super.onCreate(savedInstanceState);
12         setContentView(R.layout.activity_spinner);
13 
14         drink = this.findViewById(R.id.drink);
15         //创建array adapter对象      选单未打开时的样式          饮品选项
16         ArrayAdapter<String> drinkAd = new ArrayAdapter<>(this,android.R.layout.simple_spinner_item,drinks);
17         drinkAd.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);//设置下拉选单的样式
18         drink.setAdapter(drinkAd);                          //设置adapter对象
19         drink.setOnItemSelectedListener(this);
20 
21         temp = this.findViewById(R.id.temp);
22         order = this.findViewById(R.id.Text_order);
23 
24 
25     }
26 
27     @Override
28     public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
29         String [] tempSet;
30         if(i == 3){　　　　　　　　　　//购买金桔柠檬时，没有常温选项
31             tempSet = tempSele2;
32         }else{
33             tempSet = tempSele1;
34         }
35         ArrayAdapter<String> tempAd = new ArrayAdapter<>(this,android.R.layout.simple_spinner_item,tempSet);
36         tempAd.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
37         temp.setAdapter(tempAd);
38     }
39 
40     @Override
41     public void onNothingSelected(AdapterView<?> adapterView) {
42 
43     }
44 
45     public void ShowOrder(View view){
46         String msg = drink.getSelectedItem() + "|" + temp.getSelectedItem();
47         order.setText(msg);
48     }
49 }