Android编程实现多列显示的下拉列表框Spinner功能示例

概述本文实例讲述了Android编程实现多列显示的下拉列表框Spinner功能。分享给大家供大家参考，具体如下：

本文实例讲述了AndroID编程实现多列显示的下拉列表框Spinner功能。分享给大家供大家参考，具体如下：

先上张效果图：

严格来说，这并不是一个下拉列表，只不过实现的效果很像是下拉列表

实现原理：

该下拉列表其实是一个AlertDialog.Builder，给它设置了一个以linearLayout布局的VIEw。该VIEw内使用了一个GrIDVIEw组件，

代码：

package yyy.testandroID9;private Intent intent;private int index = 0;private SharedPreferences preferences;private file file;private Spinner spinner;private GrIDVIEw grIDVIEw;private linearLayout layout;private Builder builder;private AlertDialog dialog;private MyAdapter adapter;/** Called when the activity is first created. */@OverrIDepublic voID onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentVIEw(R.layout.main);    LayoutInflater inflater = LayoutInflater.from(this);    layout = (linearLayout) inflater.inflate(R.layout.bank_grID,null);    grIDVIEw = (GrIDVIEw) layout.findVIEwByID(R.ID.grID);    adapter = new MyAdapter(this);    grIDVIEw.setAdapter(adapter);    button1 = (button) findVIEwByID(R.ID.button1);    button2 = (button) findVIEwByID(R.ID.button2);    textVIEw = (TextVIEw) findVIEwByID(R.ID.textvIEw);    builder = new Builder(TestAndroID9Activity.this);    builder.setVIEw(layout);    button1.setonClickListener(new OnClickListener() {      public voID onClick(VIEw arg0) {        // Todo auto-generated method stub         if(dialog == null){           dialog = builder.show();         }         dialog.show();      }    });    grIDVIEw.setonItemClickListener(new OnItemClickListener() {      public voID onItemClick(AdapterVIEw<?> arg0,VIEw arg1,int position,long arg3) {        // Todo auto-generated method stub        button1.setText(getResources().getStringArray(R.array.city)[position]);        dialog.dismiss();        adapter.map.put(index,false);        adapter.map.put(position,true);        index = position;        adapter.notifyDataSetChanged();      }    });}private class MyAdapter extends BaseAdapter{    private Context context;    private String[] citys;    private LayoutInflater inflater;    public HashMap<Integer,Boolean> map;    public MyAdapter(Context context) {      super();      this.context = context;      citys = context.getResources().getStringArray(R.array.city);      inflater = LayoutInflater.from(context);      map = new HashMap<Integer,Boolean>();      for(int i=0;i<citys.length;i++){        map.put(i,false);      }    }    public int getCount() {      // Todo auto-generated method stub      return citys.length;    }    public Object getItem(int position) {      // Todo auto-generated method stub      return null;    }    public long getItemID(int position) {      // Todo auto-generated method stub      return position;    }    public VIEw getVIEw(int position,VIEw vIEw,VIEwGroup parent) {      // Todo auto-generated method stub      if(vIEw == null){        vIEw = inflater.inflate(R.layout.bank_item,null);      }      TextVIEw textVIEw = (TextVIEw) vIEw.findVIEwByID(R.ID.List_text);      Radiobutton radiobutton = (Radiobutton) vIEw.findVIEwByID(R.ID.radiobutton);      radiobutton.setChecked(map.get(position));      textVIEw.setText(citys[position]);      return vIEw;    }}

bank_grID.xml

<?xml version="1.0" enCoding="utf-8"?><linearLayout xmlns:androID="http://schemas.androID.com/apk/res/androID"  androID:layout_wIDth="fill_parent"  androID:layout_height="fill_parent"  androID:orIEntation="vertical"  androID:padding="20dp"  androID:background="#ffffff"  androID:ID="@+ID/grID_layout">  <GrIDVIEw    androID:ID="@+ID/grID"      androID:layout_wIDth="fill_parent"      androID:layout_height="fill_parent"      androID:verticalSpacing="20px"      androID:horizontalSpacing="10px"      androID:numColumns="4"      androID:scrollbars="vertical"      androID:layout_margin="10dp"/></linearLayout>

bank_item.xml

<?xml version="1.0" enCoding="utf-8"?><linearLayout xmlns:androID="http://schemas.androID.com/apk/res/androID"  androID:layout_wIDth="fill_parent"  androID:layout_height="fill_parent"  androID:background="#ffffff"   >   <Radiobutton    androID:ID="@+ID/radiobutton"    androID:layout_wIDth="wrap_content"    androID:layout_height="wrap_content"    androID:layout_marginRight="15dp"    androID:focusable="false"    androID:clickable="false"    androID:focusableIntouchMode="false"    />  <TextVIEw    androID:ID="@+ID/List_text"    androID:layout_wIDth="wrap_content"    androID:layout_height="wrap_content"    androID:textcolor="#000000"    androID:layout_gravity="center_vertical"/></linearLayout>

更多关于AndroID相关内容感兴趣的读者可查看本站专题：《Android视图View技巧总结》、《Android布局layout技巧总结》、《Android开发入门与进阶教程》、《Android调试技巧与常见问题解决方法汇总》、《Android基本组件用法总结》及《Android控件用法总结》

希望本文所述对大家AndroID程序设计有所帮助。

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