Android Spinner 使用初步

Spinner中的选项数据通过ArrayAdapter设置,其中的数据来源可以来自程序中数组,也可以来自xml中自定义数据。


Android Spinner 使用初步
 

1,通过ArrayList获得选项数据如下:


Android Spinner 使用初步
 

Spinner spinner=null;
	Spinner spinner2=null;
	private static final String[] countries={"China","Russia","Germany","America","Belarus","Japan"};
	List allcountries=null;
	ArrayAdapter<String> adapter;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        textView=(TextView) findViewById(R.id.text);
        spinner=(Spinner) findViewById(R.id.spinner);
        allcountries=new ArrayList<String>();
        for(int i=0;i<countries.length;i++){
        	allcountries.add(countries[i]);
        }
        adapter=new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,allcountries);
        adapter.setDropDownViewResource(R.layout.myspinner_dropdown);
        spinner.setAdapter(adapter); 

其中使用了自定义选项样式, R.layout.myspinner_dropdown:

myspinner_dropdown.xml:

<?xml version="1.0" encoding="utf-8"?>
<TextView
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@+id/text1"
  android:layout_width="wrap_content"
  android:layout_height="24sp"
  android:singleLine="true"
  style="?android:attr/spinnerDropDownItemStyle">
</TextView>

 

2,通过xml中定义获得数据如下:


Android Spinner 使用初步
 

spinner2=(Spinner) findViewById(R.id.spinner2);
        ArrayAdapter<CharSequence> adapter2=ArrayAdapter.createFromResource(this, R.array.countries, android.R.layout.simple_spinner_item);
        adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner2.setAdapter(adapter2);

 在res/values中增加array.xml:

<?xml version="1.0" encoding="utf-8"?>
<resources>
<string-array name="countries">
	<item>China2</item>
	<item>USA2</item>
	<item>Japan2</item>
	<item>Germany2</item>
	<item>Belarus2</item>
	<item>Russia2</item>
</string-array>
</resources>

 选择和点击Spinner选项触发事件,其中选择事件如下:

spinner2.setOnItemClickListener(new Spinner.OnItemClickListener() {

			@Override
			public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
					long arg3) {
				// TODO Auto-generated method stub
				textView.setText("选的是:"+countries[arg2]);
			}
		});

 

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