Android下拉列表(Spinner)例子

<Spinner
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_y="132dip"
android:layout_x="97dip"
android:id="@+id/Spinner01"></Spinner>

/*
ArrayAdapter.createFromResource参数解析：
第一个是Context，
第二个(R.array.colors)是数据来源，在values.xml，内容为
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string-array name="colors">
<item>red</item>
<item>blue</item>
<item>green</item>
<item>yellow</item>
<item>black</item>
</string-array>
</resources>
第三个（android.R.layout.simple_spinner_item）为显示的样式
*/
Spinner spinner = (Spinner) findViewById(R.id.Spinner01);
//建立方法有两种
//方法一,从xml读取
//ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.colors, android.R.layout.simple_spinner_item);

//方法二,使用数组
CharSequence[] seq = {"test11","test12","test13","test14","test15"};
ArrayAdapter<CharSequence> adapter = new ArrayAdapter<CharSequence>(this, android.R.layout.simple_spinner_item, seq);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);

spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
//showToast("Spinner1: position=" + position + " id=" + id);
//选择后
}
public void onNothingSelected(AdapterView<?> arg0) {
//showToast("没有选择");
//没有选择
}
});