main.xml代码下：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/mytext"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

    <Button
        android:id="@+id/mybtn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="删除" />

</LinearLayout>

package org.lxh.demo;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnFocusChangeListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class Hello extends Activity {
	private Button btn = null;

	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState); // 生命周期方法
		super.setContentView(R.layout.main); // 设置要使用的布局管理器
		this.btn = (Button) super.findViewById(R.id.mybtn);
		this.btn.setOnClickListener(new OnClickListernerImpl());

	}

	private class OnClickListernerImpl implements OnClickListener {

		public void onClick(View v) {
			Dialog dialog = new AlertDialog.Builder(Hello.this)
					.setIcon(R.drawable.pic_m)
					.setTitle("确定删除？")
					.setMessage("您确定要删除此信息？")
					.setPositiveButton("删除",
							new DialogInterface.OnClickListener() {

								public void onClick(DialogInterface arg0,
										int arg1) {

								}
							})
					.setNegativeButton("取消",
							new DialogInterface.OnClickListener() {

								public void onClick(DialogInterface arg0,
										int arg1) {

								}
							}).create();

			dialog.show();
		}

	}
}

Dialog确定和删除按钮