Spinner（下拉窗）和AutoCompleteTextView

这两个一样的用法，功能有所不同。

spinner是下拉选择框，AutoCompelteTextView是打两个字母有提示（类似搜索），效果：

布局中加个同名控件

   <Spinner
android:id="@+id/spinner_first"
android:layout_width="match_parent"
android:layout_height="wrap_content"></Spinner>

</LinearLayout>

首先fingviewById、用的ArrayAdapter（简便），然后启动adapter

private Spinner mSpinner;
private ArrayAdapter<String> mAdapter;
private String[] mData={"hehe","haha","wangwang","zizi","zhizhi","sisi"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
// mAutoCompleteTextView= (AutoCompleteTextView) findViewById(R.id.auto_textview);
    //mAdapter=new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,mData);
mSpinner= (Spinner) findViewById(R.id.spinner_first);
mAdapter=new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,mData);
mSpinner.setAdapter(mAdapter);
}