来自：http://www.oschina.net/question/54100_33274
下拉列表 Spinner。
Spinner的使用，可以极大提高用户的体验性。当需要用户选择的时候，可以提供一个下拉列表将所有可选的项列出来。供用户选择。
Demo如下，可以留作参考
一、使用数组作为数据源
1.新建一个android的工程
2.工程的layout.xml文件如下：声明一个TextView控件和一个Spinner控件
01 |
<?xml
version="1.0"
encoding="utf-8"?> |
03 |
xmlns:android="http://schemas.android.com/apk/res/android" |
04 |
android:layout_width="fill_parent" |
05 |
android:layout_height="fill_parent" |
06 |
android:orientation="vertical" |
08 |
<TextView
android:id="@+id/spinnerText" |
09 |
android:layout_width="fill_parent" |
10 |
android:layout_height="wrap_content"></TextView> |
11 |
<Spinner
android:id="@+id/Spinner01" |
12 |
android:layout_width="fill_parent" |
13 |
android:layout_height="wrap_content"></Spinner> |
3.java代码
01 |
import android.app.Activity; |
02 |
import android.os.Bundle; |
03 |
import android.view.View; |
04 |
import android.widget.AdapterView; |
05 |
import android.widget.AdapterView.OnItemSelectedListener; |
06 |
import android.widget.ArrayAdapter; |
07 |
import android.widget.Spinner; |
08 |
import android.widget.TextView; |
10 |
public class
SpinnerActivity extends
Activity { |
12 |
private
static final
String[] m={"A型","B型","O型","AB型","其他"}; |
13 |
private
TextView view ; |
14 |
private
Spinner spinner; |
15 |
private
ArrayAdapter<String> adapter; |
17 |
protected
void onCreate(Bundle savedInstanceState) { |
19 |
super.onCreate(savedInstanceState); |
20 |
setContentView(R.layout.spinner); |
22 |
view = (TextView) findViewById(R.id.spinnerText); |
23 |
spinner = (Spinner) findViewById(R.id.Spinner01); |
25 |
adapter =
new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,m); |
28 |
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); |
31 |
spinner.setAdapter(adapter); |
34 |
spinner.setOnItemSelectedListener(new
SpinnerSelectedListener()); |
37 |
spinner.setVisibility(View.VISIBLE); |
42 |
class
SpinnerSelectedListener implements
OnItemSelectedListener{ |
44 |
public
void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, |
46 |
view.setText("你的血型是："+m[arg2]); |
49 |
public
void onNothingSelected(AdapterView<?> arg0) { |
4、运行效果如下：
二、使用XML作为数据源
1.新建一个android的工程
2.在values文件夹下新建一个arryas.xml文件：声明一个TextView控件和一个Spinner控件，代码如下：
01 |
<?xml
version="1.0"
encoding="utf-8"?> |
03 |
<string-array
name="plantes"> |
3.java代码
01 |
import android.app.Activity; |
02 |
import android.os.Bundle; |
03 |
import android.view.View; |
04 |
import android.widget.AdapterView; |
05 |
import android.widget.AdapterView.OnItemSelectedListener; |
06 |
import android.widget.ArrayAdapter; |
07 |
import android.widget.Spinner; |
08 |
import android.widget.TextView; |
10 |
public class
SpinnerActivity extends
Activity { |
12 |
private
TextView view2; |
13 |
private
Spinner spinner2; |
14 |
private
ArrayAdapter adapter2; |
17 |
protected
void onCreate(Bundle savedInstanceState) { |
19 |
super.onCreate(savedInstanceState); |
20 |
setContentView(R.layout.spinner); |
22 |
spinner2 = (Spinner) findViewById(R.id.spinner02); |
23 |
view2 = (TextView) findViewById(R.id.spinnerText02); |
26 |
adapter2 = ArrayAdapter.createFromResource(this, R.array.plantes, android.R.layout.simple_spinner_item); |
29 |
adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); |
32 |
spinner2.setAdapter(adapter2); |
35 |
spinner2.setOnItemSelectedListener(new
SpinnerXMLSelectedListener()); |
38 |
spinner2.setVisibility(View.VISIBLE); |
43 |
class
SpinnerXMLSelectedListener implements
OnItemSelectedListener{ |
44 |
public
void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, |
46 |
view2.setText("你使用什么样的手机："+adapter2.getItem(arg2)); |
49 |
public
void onNothingSelected(AdapterView<?> arg0) { |
4、运行效果如下：
