Android编程实现多列显示的下拉列表框Spinner功能示例

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;

@Override
public 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 map;
    public MyAdapter(Context context) {
      super();
      this.context = context;
      citys = context.getResources().getStringArray(R.array.city);
      inflater = LayoutInflater.from(context);
      map = new HashMap();
      for(int i=0;i

bank_grid.xml



  




bank_item.xml



   
  




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希望本文所述对大家Android程序设计有所帮助。