当前位置: 代码迷 >> Android >> Android Spinner 运用初步
  详细解决方案

Android Spinner 运用初步

热度:58   发布时间:2016-05-01 16:19:55.0
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。



?

1,通过ArrayList获得选项数据如下:



?

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:



?

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]);			}		});

?

  相关解决方案