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：
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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. */
@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
<?xml version="1.0" encoding="utf-8"?>
bank_item.xml
<?xml version="1.0" encoding="utf-8"?>
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希望本文所述对大家Android程序设计有所帮助。
分享题目：Android编程实现多列显示的下拉列表框Spinner功能示例
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