实现下拉列表效果

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<TextView
android:id="@+id/show"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/show"
/>

<Spinner
android:id="@+id/list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>

</LinearLayout>

通过适配器想spinner中添加选项：

public class MainActivity extends Activity {

private Spinner listView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
initView();
}

private void initView(){

listView = (Spinner)findViewById(R.id.list);
String [] items = {"篮球","足球","羽毛球","网球"};
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,items);
listView.setAdapter(adapter);

listView.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view,
int position, long ID) {
String show = parent.getItemAtPosition(position).toString();
Toast.makeText(getApplicationContext(), "选择的是："+show, 2000).show();
}

@Override
public void onNothingSelected(AdapterView<?> arg0) {
}

});

}

}