Android的下拉式選單

最新推荐文章于 2025-06-20 14:56:05 发布

最新推荐文章于 2025-06-20 14:56:05 发布 · 228 阅读

文章标签：

#Android #OS

本文提供了一个 Android 应用中使用 Spinner 控件的示例代码。该示例展示了如何创建并设置 Spinner，包括初始化数据源、配置适配器以及为 Spinner 设置选择监听器。

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package android.demo.spinner;

import android.app.Activity;

import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.*;
import android.widget.AdapterView.OnItemClickListener;
import android.os.Bundle;

public class Spinner_Activity extends Activity 
{

    /** Called when the activity is first created. */
	private static final String[] m_Countries ={"111","222","333"};
	private TextView m_TextView;
	private Spinner m_Spinner;
	private String TAG;
	private ArrayAdapter<String> adapter;
    @Override
    public void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        m_Spinner = (Spinner) findViewById(R.id.Spinner1);
        m_TextView= (TextView)findViewById(R.id.TextView1);
        adapter= new ArrayAdapter<String>( this,android.R.layout.simple_spinner_item,m_Countries);
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

        m_Spinner.setAdapter(adapter);
        try{

        m_Spinner.setOnItemSelectedListener (On_ItemSelected_Click);

        }catch(Exception err)
        {

			Log.e(TAG, "error: " + err.toString());
			Toast.makeText(Spinner_Activity.this,err.toString(),
			Toast.LENGTH_LONG).show();

        };

    }
    public Spinner.OnItemSelectedListener On_ItemSelected_Click=new Spinner.OnItemSelectedListener()
    {


		@Override
		public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
				long arg3)
		{
			// TODO Auto-generated method stub
			Toast.makeText(Spinner_Activity.this, "您選擇"+arg0.getSelectedItem().toString(), Toast.LENGTH_LONG).show(); 

		}

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

		}
    };

}