点击一个按钮，弹出一个对话框，对弹出的对话框进行配置

activity

package com.dialog.test1;


import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.widget.Button;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
public class DialogTest1 extends Activity {
    /** Called when the activity is first created. */
    private Button btn;
    private String TAG="DialogTest1";
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        btn=(Button)findViewById(R.id.button1);
        btn.setOnClickListener(mylistener);
       
    }
    private OnClickListener mylistener= new OnClickListener(){

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            //按了button按钮以后，让他弹出一个对话框
            new AlertDialog.Builder(DialogTest1.this)
            .setIcon(R.drawable.icon)
            .setTitle(R.string.title_name)
            .setMessage(R.string.message_name)
            .setPositiveButton(R.string.btn1_name, new DialogInterface.OnClickListener(){

                @Override
                public void onClick(DialogInterface dialog, int which) {
                    // TODO Auto-generated method stub
                    Log.v(TAG,"你点击了确定");
                    //activity finish
                    finish();
                }
                
            })
            .show();
            
        }   
    };
    @Override
    protected void onDestroy() {
        // TODO Auto-generated method stub
        super.onDestroy();
        Log.v(TAG,"activity finish");
    }
    
}

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
<Button
    android:id="@+id/button1"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="按我会显示对话框哦！"/>   
</LinearLayout>

string.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="hello">Hello World, DialogTest1!</string>
    <string name="app_name">DialogTest1</string>
    <string name="title_name">我是标题</string>
    <string name="message_name">我是message</string>
    <string name="btn1_name">确定</string>
    <string name="btn2_name">取消</string>
</resources>

log 信息

V/DialogTest1( 2244): 你点击了确定
V/DialogTest1( 2309): activity finish

如果不加finish这句话，点完确定之后，对话框也会消失。