Android界面之Spinner

最新推荐文章于 2024-08-11 04:00:42 发布

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本文介绍了一个具体的Spinner组件应用实例，展示了如何通过Spinner组件在Android应用中实现血型选择功能。文章详细解释了如何创建Spinner、配置适配器，并为Spinner添加事件监听器以响应用户的操作。

package com.lan.mySpinner;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.TextView;

public class ActivitySpinner extends Activity {
	private static final String[] m_Countries = {
		"O型","A型","B型","AB型","其它型"
	};
	private TextView m_TextView;
	private Spinner m_Spinner;
	private ArrayAdapter<String> adapter;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        m_TextView = (TextView)findViewById(R.id.TextView01);
        m_Spinner = (Spinner)findViewById(R.id.Spinner01);
        
        //将可选容器与ArrayAdapter连接
        adapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,m_Countries);
        //设置下拉列表风格
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        //将adapter 添加到m_Spinner中
        m_Spinner.setAdapter(adapter);
        //添加Spinner事件监听
        m_Spinner.setOnItemSelectedListener(new Spinner.OnItemSelectedListener()
        {

			public void onItemSelected(AdapterView<?> arg0, View arg1,
					int arg2, long arg3) {
				// TODO Auto-generated method stub
				m_TextView.setText("你选择的血型是："+m_Countries[arg2]);
				arg0.setVisibility(View.VISIBLE);
			}

			public void onNothingSelected(AdapterView<?> arg0) {
				// TODO Auto-generated method stub
				
			}
        	
        });
    }
}