Android AlertDialog

AlertDialogでコンテキストメニューを表示する

Activity

package com.sqlendia.android;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class Android2_21Activity extends Activity
{
    AlertDialog actions;

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);

        setTitle("アラーとダイヤログ");

        Button button = new Button(this);
        button.setText("選んでくださし");
        button.setOnClickListener(new View.OnClickListener()
        {
            public void onClick(View v)
            {
                actions.show();
            }
        });

        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("オプション");
        String[] optoins =
        { "オプション１", "オプション2", "オプション3" };

        builder.setItems(optoins, new DialogInterface.OnClickListener()
        {
            public void onClick(DialogInterface dialog, int which)
            {
                switch (which)
                {
                case 0:
                    break;
                case 1:
                    break;
                case 2:
                    break;
                default:
                    break;
                }
            }
        });

        builder.setNegativeButton("Cancel", null);
        actions = builder.create();

        setContentView(button);
    }
}