下拉列表

Posted 2020-07-06 zhongyinghe

1、视图

 1 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     xmlns:tools="http://schemas.android.com/tools"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     tools:context=".MainActivity" >
 6 
 7     <Spinner
 8         android:id="@+id/spinner"
 9         android:layout_width="wrap_content"
10         android:layout_height="wrap_content"
11          />
12 
13 </RelativeLayout>

2、java代码

 1 package com.example.myspinner;
 2 
 3 import android.os.Bundle;
 4 import android.app.Activity;
 5 import android.view.Menu;
 6 import android.widget.ArrayAdapter;
 7 import android.widget.Spinner;
 8 
 9 public class MainActivity extends Activity {
10 
11     @Override
12     protected void onCreate(Bundle savedInstanceState) {
13         super.onCreate(savedInstanceState);
14         setContentView(R.layout.activity_main);
15         
16         Spinner spinner = (Spinner) findViewById(R.id.spinner);
17         ArrayAdapter<String> adapter = new ArrayAdapter(this, android.R.layout.simple_spinner_item);
18         adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
19         adapter.add("java");
20         adapter.add("php");
21         adapter.add("ruby");
22         spinner.setAdapter(adapter);
23     }
24 
25 }